Document:

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                                                                   EXHIBIT 10.26

                              ASSUMPTION AGREEMENT

        THIS ASSUMPTION AGREEMENT is executed and delivered pursuant to that
certain Agreement and Plan of Merger, dated as of January 28, 2001 (the "Merger
Agreement"), by and among Maxim Integrated Products, Inc., a Delaware
corporation (the "Company"), MI Acquisition Sub, Inc., a Delaware corporation,
and Dallas Semiconductor Corporation, a Delaware corporation ("Dallas
Semiconductor"), pursuant to which Dallas Semiconductor will become a wholly
owned subsidiary of the Company. Pursuant to Section 6.3(c) of the Merger
Agreement, the Company is required to expressly assume the obligations of that
certain Dallas Semiconductor Executives Retiree Medical Plan, effective as of
October 1, 1999, as amended (the "Plan"), a copy of which is attached hereto as
Exhibit A.

        For good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged, in accordance with the provisions of Section 13.11
of the Plan, the Company hereby assumes and agrees to pay, perform, and
discharge in accordance with the terms thereof, all of the duties, liabilities
and obligations of Dallas Semiconductor under the Plan.

        This Assumption Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and assigns.

      [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS]

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        IN WITNESS WHEREOF, each party hereto has caused this instrument to be
executed by its duly authorized officer this the 11th day of April, 2001.

                                        MAXIM INTEGRATED PRODUCTS, INC.

                                        By:    /s/ Carl W. Jasper
                                            ------------------------------------

                                        Name:  Carl W. Jasper

                                        Title: Chief Financial Officer

                                        DALLAS SEMICONDUCTOR CORPORATION

                                        By:    /s/ Alan P. Hale
                                            ------------------------------------

                                        Name:  Alan P. Hale

                                        Title: Chief Financial Officer

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                                    Exhibit A

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                        DALLAS SEMICONDUCTOR CORPORATION

                         EXECUTIVES RETIREE MEDICAL PLAN

                           (EFFECTIVE OCTOBER 1, 1999)

                                       1
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                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                          PAGE
<S>     <C>                                                                                 <C>
ARTICLE I - INTRODUCTION.....................................................................1

        1.1    Purpose of Plan...............................................................1
        1.2    Medical Care Plan Status......................................................1

ARTICLE II - DEFINITIONS.....................................................................2

        2.1    "Administrator"...............................................................2
        2.2    "Board".......................................................................2
        2.3    "Board Member"................................................................2
        2.4    "Code"........................................................................2
        2.5    "Covered Dependent"...........................................................2
        2.6    "Creditable Coverage".........................................................2
        2.7    "Dependent"...................................................................3
        2.8    "Director"....................................................................3
        2.9    "Effective Date"..............................................................3
        2.10   "Eligible Employee"...........................................................3
        2.11   "Eligible Individual".........................................................3
        2.12   "Eligible Retiree"............................................................3
        2.13   "Employer"....................................................................3
        2.14   "Enrollment Date".............................................................3
        2.15   "Enrollment Period"...........................................................4
        2.16   "ERISA".......................................................................4
        2.17   "Excepted Benefits":..........................................................4
        2.18   "FMLA"........................................................................5
        2.19   "Genetic Information".........................................................5
        2.20   "Health Status - Related Factor"..............................................5
        2.21   "Late Enrollee"...............................................................5
        2.22   "Manager".....................................................................5
        2.23   "Military Leave"..............................................................5
        2.24   "Officer".....................................................................5
        2.25   "Participant".................................................................6
        2.26   "Participating Employer"......................................................6
        2.27   "Placed for Adoption".........................................................6
        2.28   "Plan"........................................................................6
        2.29   "Plan Year"...................................................................6
        2.30   "Policy"......................................................................6
        2.31   "Pre-existing Condition"......................................................6
        2.32   "Pre-existing Condition Exclusion"............................................6
        2.33   "Qualified Medical Child Support Order".......................................6
</TABLE>

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<TABLE>
<S>     <C>                                                                                 <C>
        2.34   "Qualified Medical Expense"...................................................6
        2.35   "Retirement" and "Retire".....................................................7
        2.36   "Sponsor".....................................................................7
        2.37   "Spouse"......................................................................7
        2.38   "USERRA"......................................................................7
        2.39   "Waiting Period"..............................................................7

ARTICLE III - PARTICIPATION..................................................................7

        3.1    Eligibility to Participate....................................................7
        3.2    Commencement of Participation.................................................8
        3.3    Cessation of Participation....................................................8
        3.4    USERRA Reinstatement Rules....................................................9
        3.5    FMLA Compliance...............................................................9
        3.6    Reinstatement of Former Participant..........................................10
        3.7    No Eligibility Discrimination Due to Health..................................10
        3.8    Special Enrollments..........................................................10

ARTICLE IV - ELECTION TO RECEIVE MEDICAL CARE BENEFITS......................................11

        4.1    Election of Benefit Options..................................................11
        4.2    Election Procedure...........................................................12
        4.3    No Premium Discrimination Due to Health......................................12

ARTICLE V - MEDICAL CARE BENEFITS...........................................................12

        5.1    Benefits.....................................................................12
        5.2    Pre-existing Conditions......................................................12
        5.3    Notification of Enrollment Rights............................................14
        5.4    Newborns' and Mothers' Health Protection Act of 1996.........................14
        5.5    Mental Health Parity Act of 1996.............................................14
        5.6    Women's Health and Cancer Rights Act of 1998.................................15

ARTICLE VI - PAYMENT OF MEDICAL CARE EXPENSE REIMBURSEMENTS.................................15

        6.1    Claims Procedure.............................................................15
        6.2    Reimbursement of Expenses....................................................15

ARTICLE VII - COORDINATION OF BENEFITS......................................................15

        7.1    Explanation..................................................................15
        7.2    Definitions..................................................................16
</TABLE>

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<TABLE>
<S>     <C>                                                                                 <C>
        7.3    Coordination of Benefits Procedure...........................................16
        7.4    Existence of Other Group Plans...............................................18
        7.5    Recovery and Payment of Benefits.............................................18
        7.6    Coordination with Medicare, Medicaid and CHAMPUS.............................19
        7.7    Subrogation..................................................................20

ARTICLE VIII - TERMINATION OF PARTICIPATION.................................................21

        8.1    Limitation on Covered Expenses...............................................21
        8.2    Date of Policy Coverage Termination..........................................21

ARTICLE IX - CONTINUATION COVERAGE UNDER "COBRA"............................................22

        9.1    Special Definitions..........................................................22
        9.2    Entitlement to Continuation Coverage.........................................23
        9.3    Notice Required..............................................................23
        9.4    Election of Continuation Coverage............................................24
        9.5    Premiums.....................................................................24
        9.6    Period of Continuation Coverage..............................................24
        9.7    Expiration of Continuation Coverage..........................................26

ARTICLE X - FUNDING.........................................................................26

ARTICLE XI - ADMINISTRATION.................................................................27

        11.1   Named Fiduciary..............................................................27
        11.2   Allocation of Fiduciary Responsibilities.....................................27
        11.3   Records......................................................................27
        11.4   Appointment of Committee.....................................................28
        11.5   Actions of Committee.........................................................28
        11.6   Other Powers and Duties of the Administrator.................................28
        11.7   Indemnification..............................................................29
        11.8   Reliance on Tables, Etc......................................................30
        11.9   Claims and Review Procedures.................................................30
        11.10  Participant's Responsibilities...............................................31
        11.11  Missing Persons..............................................................31
        11.12  Nondiscriminatory Exercise of Authority......................................31
        11.13  Expenses.....................................................................31

ARTICLE XII - AMENDMENT OR TERMINATION OF PLAN..............................................32

        12.1   Amendment of Plan............................................................32
        12.2   Termination of Plan..........................................................32
</TABLE>

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<TABLE>
<S>     <C>                                                                                 <C>
ARTICLE XIII - MISCELLANEOUS................................................................32

        13.1   Information to be Furnished..................................................32
        13.2   Limitation of Rights.........................................................32
        13.3   Benefits Not Solely from Policy..............................................32
        13.4   Nonassignability of Rights...................................................33
        13.5   No Guarantee of Tax Consequences.............................................33
        13.6   Severability.................................................................33
        13.7   Construction of Terms........................................................33
        13.8   Choice of Law/Jurisdiction and Venue.........................................33
        13.9   No Vested Interest...........................................................33
        13.10  No Guarantee of Employment...................................................33
        13.11  Adoption by Successor Employer or Affiliates.................................34
        13.12  Bonding......................................................................34

ARTICLE XIV - QUALIFIED MEDICAL CHILD SUPPORT ORDERS........................................34

        14.1   Notification of Receipt of Child Support Order...............................34
        14.2   Procedures to Determine if Medical Child Support Order is a Qualified
               Medical Child Support Order..................................................35
        14.3   Treatment of Alternate Recipient under Qualified Medical Child Support
               Order........................................................................36
        14.4   Cost of Qualified Medical Child Support Order Benefits.......................36
        14.5   Qualified Medical Child Support Order and Medicaid...........................37
        14.6   Payments or Reimbursements under a Qualified Medical Child Support
               Order........................................................................37
        14.7   Alternate Recipient..........................................................37

ARTICLE XV - POLICY.........................................................................37

ARTICLE XVI - PARTICIPATING EMPLOYERS.......................................................37

        16.1   Adoption by Other Employers..................................................37
        16.2   Requirements of Participating Employers......................................38
        16.3   Designation of Agent.........................................................38
        16.4   Transfers....................................................................38
        16.5   Participating Employer's Contribution........................................38
        16.6   Discontinuance of Participation..............................................38
        16.7   Administrator's Authority....................................................39
</TABLE>

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                                   ARTICLE I

                                  INTRODUCTION

        1.1    PURPOSE OF PLAN. The purpose of this Plan is to enable the
Sponsor to provide retiree (and limited other) medical care benefits to (a)
Board Members during the term of their service as a Board Member on behalf of
the Sponsor, and (b) to Board Members and to Eligible Retirees upon their
Retirement from the employment, or service as a Board Member, as applicable, of
the Sponsor or any other Participating Employers. On the Effective Date, the
Plan makes available to Participants the medical insurance described in the
Policy attached as Exhibit A.

        Board Members, Officers and Spouses are to get lifetime coverage and
benefits under this Plan. Each other Participant and his spouse are to get
coverage and benefits under the Plan until the covered individual reaches his
(or her, as appropriate) 65th birthday. Covered Dependents (other than a spouse)
of a Participant who is not a Board Member or Officer are to get coverages and
benefits until the Participant's 65th birthday.

        The specific medical coverages and benefits available to Participants
are identified in the Policy. In the event a Policy is not in effect at the time
a qualifying expense was incurred, the specific medical coverages and benefits
available at that time will be those identified in the Policy most recently in
effect immediately prior to the date the expense was incurred.

        Notwithstanding anything in the Plan to the contrary, the Plan is
intended to provide medical coverage and benefits without regard to whether a
Policy is in effect at a particular time. Except for the coordination of
benefits as required by ARTICLE VII, the benefits and coverages under this Plan
shall not decrease or be reduced in the aggregate or individually by more than
an immaterial amount during the life of this Plan, except as provided in SECTION
12.1 The Sponsor will select and utilize a Policy or Policies that provides
medical coverages and benefits that are not worse than the coverages and
benefits provided by Sponsor to active employees of the Sponsor outside of this
Plan at the time the Policy or Policies were selected, and in the event that it
is determined the Sponsor has attempted to reduce benefits and coverages in an
effort to circumvent the restrictions of this Section and its obligations under
the Plan, notwithstanding anything to the contrary in this Plan, (i) the Plan
shall provide, for the remainder of the Plan's existence, the most valuable
benefits and coverages the Plan provided at any time during the Plan's existence
up to that time, and (ii) the Sponsor shall obtain and maintain insurance
providing coverage and benefits at least as good as those required under this
paragraph.

        1.2    MEDICAL CARE PLAN STATUS. This Plan is intended to qualify as a
"medical care plan" under sections 105 and 106 of the Code, and is to be
interpreted in a manner consistent with the requirements of sections 105 and 106
of the Code. It is intended that the value of medical coverage be excluded from
the Participants' income under Code section 106, to the extent applicable.

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        The Plan is intended to satisfy all applicable requirements of the Code
and its regulations. This Plan is also intended to satisfy those requirements of
ERISA which are applicable to employee medical plans. Nothing in the Plan shall
be construed as requiring compliance with Code or ERISA provisions that do not
otherwise apply.

                                   ARTICLE II

                                   DEFINITIONS

        Whenever used in this document, the following terms have the following
meanings unless a different meaning is clearly required by the context, and
defined terms from the Policy are incorporated in this document by reference,
but only to the extent that such terms are not inconsistent with the following
definitions:

        2.1    "ADMINISTRATOR" means the Sponsor, which shall be the plan
administrator within the meaning of ERISA section 3(16).

        2.2    "BOARD" means the Board of Directors of the Sponsor.

        2.3    "BOARD MEMBER" means each person listed on Exhibit D to the Plan.

        2.4    "CODE" means the Internal Revenue Code of 1986, as amended.

        2.5    "COVERED DEPENDENT" means an individual who qualifies as a
Dependent or as a Spouse under this Plan and who was enrolled by a Participant
under this Plan when he was a Participant under this Plan.

        2.6    "CREDITABLE COVERAGE" means, with respect to an individual,
coverage of the individual under any of the following:

               (a)    A group health plan;

               (b)    Health insurance coverage-,

               (c)    Part A or part B of title XVIII of the Social Security
                      Act;

               (d)    Title XIX of the Social Security Act, other than coverage
                      consisting solely of benefits under section 1928;

               (e)    Chapter 55 of title 10, United States Code;

               (f)    A medical care program of the Indian Health Service or of
                      a tribal organization;

               (g)    A State health benefits risk pool;

               (h)    A health plan offered under chapter 99 of title 5, United
                      States Code;

                                       2
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               (i)    A public health plan (as defined in Federal regulations);

               (j)    A health benefit plan under section 5(e) of the Peace
                      Corps Act (22 U.S.C. 2504(e); or

               (k)    A state uninsured children's health insurance program.

        Such term does not include coverage consisting solely of coverage of
Excepted Benefits.

        2.7    "DEPENDENT" means any person who is a dependent of a Participant
(including, without limitation, a Participant's spouse on the date of his
Retirement) and who satisfies the definition of "dependent" in the Policy in
effect on the date of the Participant's Retirement, or if none, in the last
Policy in effect immediately prior to the Participant's Retirement.

        2.8    "DIRECTOR" means the title awarded by an Employer to employees
(who are not members of the Board) in certain job classifications as specified
on its books and records.

        2.9    "EFFECTIVE DATE" means October 1, 1999, the effective date of the
Plan, except where expressly stated otherwise in this document.

        2.10   "ELIGIBLE EMPLOYEE" means (i) each Officer of the Sponsor on the
Effective Date, (ii) each common-law employee of an Employer who was designated
on the books and records of the Employer as a "functionally equivalent" officer
on the Effective Date and who shared in the contribution made on June 12, 1998,
to the Dallas Semiconductor Corporation Executive Deferred Compensation Plan,
(iii) each common-law employee of an Employer, on the Effective Date, who, on
the Effective Date (or within the five (5) calendar year period preceding the
Effective Date), also held the title of Director or was the Sponsor's corporate
controller, and (iv) each common-law employee of an Employer, on the Effective
Date, who, on the Effective Date, held the position of Manager and was required
to report for operating purposes directly to the Sponsor's President and Chief
Executive Officer. Each person who was an Eligible Employee on the Effective
Date is listed on either Exhibit C or Exhibit F to the Plan.

        2.11   "ELIGIBLE INDIVIDUAL" means a Board Member or an Eligible
Retiree, as appropriate, who has satisfied (i) the requirements of Article III
to be eligible to participate in the Plan, and (ii) the eligibility requirements
stated in the Policy.

        2.12   "ELIGIBLE RETIREE" means an Eligible Employee who has Retired
after the Effective Date.

        2.13   "EMPLOYER" means the Sponsor and each Participating Employer
which shall adopt this Plan under Article XVI.

        2.14   "ENROLLMENT DATE" means the earlier of (i) the last day of an
Enrollment Period during which an Eligible Individual did not elect under
SECTION 3.2 to not be a Participant, or (ii) the first day of the period that
must pass under ARTICLE III, if any, before an Eligible Employee, Board Member
or Dependent, as appropriate, is eligible to be covered for benefits under the
Plan.

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        2.15   "ENROLLMENT PERIOD" means (i) in the case of an Eligible Retiree,
the thirty (30) day period occurring after the Eligible Retiree's Retirement
during which an Eligible Retiree may refuse in writing under Section 3.2 to
participate under the Plan, and (ii) in the case of a Board Member, the thirty
(30) day period occurring immediately after the Effective Date.

        2.16   "ERISA" means the Employee Retirement Income Security Act of
1974, as amended.

        2.17   "EXCEPTED BENEFITS" means the following:

               (a)    benefits not subject to the requirements regarding
                      Creditable Coverage:

                      (1)    coverage only for accident or disability income
                             insurance or any combination thereof,

                      (2)    coverage issued as a supplement to liability
                             insurance;

                      (3)    liability insurance, including general liability
                             insurance and automobile liability insurance;

                      (4)    workers' compensation or similar insurance,

                      (5)    automobile medical payment insurance;

                      (6)    credit-only insurance;

                      (7)    coverage for on-site medical clinics; and

                      (8)    other similar insurance coverage, specified in
                             regulations, under which benefits for medical care
                             are secondary or incidental to other insurance
                             benefits.

               (b)    If offered separately:

                      (1)    limited scope dental or vision benefits;

                      (2)    benefits for long-term care, nursing home care,
                             home health care, community based care, or any
                             combination thereof,

                      (3)    other similar limited benefits as specified in
                             regulations.

               (c)    If offered as independent non-coordinated benefits
                      (separate consent or policy, no coordination of benefits
                      with any other plan sponsored by the employer):

                      (1)    coverage for a specified disease or illness;

                      (2)    hospital indemnity or other fixed indemnity
                             insurance.

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               (d)    If offered as separate insurance policy, Medicare
                      supplemental health insurance and similar supplemental
                      coverage.

        2.18   "FMLA" means the Family and Medical Leave Act of 1993, as
amended.

        2.19   "GENETIC INFORMATION" means information about genes, gene
products, and inherited characteristics that may derive from the individual or a
family member. This includes information regarding carrier status and
information derived from laboratory tests that identify mutations in specific
genes or chromosomes, physical medical examinations, family histories, and
direct analysis of genes or chromosomes.

        2.20   "HEALTH STATUS - RELATED FACTOR" means the following factors:

               (a)    health status,

               (b)    medical condition (include both physical and mental
                      illnesses),

               (c)    claims experience,

               (d)    receipt of health care,

               (e)    medical history,

               (f)    Genetic Information,

               (g)    evidence of insurability (including conditions arising out
                      of acts of domestic violence), and

               (h)    disability.

        2.21   "LATE ENROLLEE" means a Participant or Covered Dependent who
enrolled under this Plan other than during his first Enrollment Period or a
Special Enrollment Period.

        2.22   "MANAGER" means the title awarded by an Employer to employees in
certain job classifications as specified on its books and records.

        2.23   "MILITARY LEAVE" means the absence due to the performance of duty
on a voluntary or involuntary basis under competent authority in (i) the Armed
Forces, (ii) the Army National Guard and the Air National Guard when engaged in
active duty for training, inactive duty training, or full-time National Guard
duty, (iii) the commissioned corps of the Public Health Service, and (iv) other
categories of persons designated by the President in time of war or emergency
for a period of up to thirty (30) days during which a person who previously
qualified as an employee is not employed on a full-time basis solely because the
person is engaged in active military service for the United States government.

        2.24   "OFFICER" means each person listed on Exhibit C to the Plan.

                                       5
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        2.25   "PARTICIPANT" means any Eligible Individual who has elected to
               participate in the Plan in accordance with ARTICLE III.

        2.26   "PARTICIPATING EMPLOYER" means any entity which has adopted this
Plan pursuant to ARTICLE XVI.

        2.27   "PLACED FOR ADOPTION" means the assumption and retention by an
Eligible Employee of a legal obligation for the total or partial support of an
individual in anticipation of adoption of a child prior to the date on which
such child attains age eighteen (18). A child's status as having been Placed for
Adoption ends on the date that the Eligible Employee's legal obligation
described in this Section ends.

        2.28   "PLAN" means the Dallas Semiconductor Corporation Executives
Retiree Medical Plan, as set forth in this document, and any and all amendments,
schedules and supplements to this document.

        2.29   "PLAN YEAR" means the period beginning on the Effective Date and
ending on the following December 31 and, thereafter, the fiscal year beginning
on each January 1 (starting on January 1, 2000) and ending on the following
December 31.

        2.30   "POLICY" means the fully-insured medical insurance policy or
policies described on Exhibit A attached to this Plan, as such Exhibit A existed
on the Effective Date or as it may be amended in the future.

        2.31   "PRE-EXISTING CONDITION" means a condition (whether physical or
mental), regardless of the cause of the condition, for which medical advice,
diagnosis, care or treatment was recommended or received within the six (6)
month period ending on the Enrollment Date.

        2.32   "PRE-EXISTING CONDITION EXCLUSION" means with respect to
coverage, a limitation or exclusion of benefits relating to a condition based on
the fact that the condition was present before the date of enrollment for such
coverage, whether or not any medical advice, diagnosis, care or treatment was
recommended or received before such date. Genetic Information is not a
Pre-existing Condition in the absence of a diagnosis of the condition related to
such information.

        2.33   "QUALIFIED MEDICAL CHILD SUPPORT ORDER" means any judgment,
decree, order (including a settlement agreement), administrative notice or
National Medical Support Notice (defined in section 609(a)(5)(C) of ERISA) which
satisfies the requirements set forth in ARTICLE XIV.

        2.34   "QUALIFIED MEDICAL EXPENSE" means an expense incurred by a
Participant, by the Participant's spouse or by a Dependent of such Participant
for medical care as defined in Code section 213, including, without limitation,
amounts paid for hospital bills and doctor bills, but only to the extent that
(i) the Participant or other person is not reimbursed for the expense through
insurance or otherwise, other than under the Plan, and (ii) the expense is not
taken into account as a deduction by the Participant on his Internal Revenue
Service Form 1040; provided, however, that notwithstanding anything in this
document to the contrary, a Qualified Medical

                                       6
<PAGE>   15

Expense shall be limited to only those expenses covered under the Policy, if a
Policy is in effect, and if no Policy is in effect so that the expense is
covered by Policy, to only those expenses covered under the Policy last in
effect immediately prior to the date the expense was incurred.

        2.35   "RETIREMENT" and "RETIRE" mean (i) an Eligible Employee's
termination of employment with an Employer, voluntarily or involuntarily, after
the Effective Date when the Eligible Employee has at least (10) ten years of
employment by the Sponsor or its affiliates and has reached the age of at least
fifty (50) and (ii) an Officer's termination of employment with an Employer,
voluntarily or involuntarily, after the Effective Date when the Officer has at
least ten (10) years of employment by, and five (5) years as an Officer of, the
Sponsor or its affiliates. A Board Member shall be deemed to be Retired for
purposes of only this Plan on the Effective Date of the Plan.

        2.36   "SPONSOR" means Dallas Semiconductor Corporation, a Delaware
corporation, or any successor or assign which shall adopt the Plan. Throughout
the Plan, a purposeful distinction is drawn between the Sponsor and the
Employers. The powers and responsibilities assigned to the Sponsor by the Plan
shall apply exclusively to the Sponsor, unless specifically delegated in writing
by the Sponsor.

        2.37   "SPOUSE" means the wife of an Officer or of a Board Member on the
date of his Retirement. Each person who was a Spouse on the Effective Date is
listed on Exhibit E, but being listed on Exhibit E does not make an individual a
Spouse for purposes of this Plan.

        2.38   "USERRA" means the Uniformed Services Employment and Reemployment
Rights Act of 1994, as amended.

        2.39   "WAITING PERIOD" means with respect to a group health plan and an
individual who is a potential Participant or beneficiary in the plan, the period
that must pass with respect to the individual before the individual is eligible
to be covered for benefits under the terms of the plan. Any period of time
before a Late Enrollee enrolls under a Special Enrollment Period is not a
Waiting Period.

        Special definitions used only for particular purposes are found in
ARTICLE VII and ARTICLE IX.

                                   ARTICLE III

                                 PARTICIPATION

        3.1    ELIGIBILITY TO PARTICIPATE. Eligible Employees and Board Members
shall become Eligible Individuals on the Effective Date. No other individual may
become a Participant (or an Eligible Individual) under the Plan.

        The Policy in effect on the date of a Participant's Retirement
determines (i) the Plan's Eligible Individuals, (ii) the Plan's Spouses and
(iii) those Dependents, if any, of an Eligible Individual who will be eligible
to be covered under its terms. When an Eligible Individual's

                                       7
<PAGE>   16

eligible Dependents satisfy the eligibility requirements of the Policy in effect
on the date of a Participant's Retirement, those eligible Dependents shall also
be eligible to participate at that time under the Plan. If, at the date of a
Participant's Retirement, no Policy is then in effect, the Participant's
eligible Dependents shall be determined under the terms of the Policy last in
effect with respect to the Plan.

        3.2    COMMENCEMENT OF PARTICIPATION. An Eligible Individual shall
become a Participant automatically when he becomes an Eligible Individual unless
he refuses in writing in a form acceptable to the Administrator that is received
by the Administrator before the Eligible Individual's Enrollment Date.

        3.3    CESSATION OF PARTICIPATION. Subject to Section 12.2, a Board
Member and an Officer shall be a Participant and receive coverage under this
Plan for his life.

        A Participant (other than a Board Member or an Officer) shall be a
Participant and receive coverage under the Plan until his 65th birthday and such
a Participant's spouse shall be a Covered Dependent and receive coverage under
the Plan until her 65th birthday; provided, however, that notwithstanding
anything in this Plan to the contrary, a Participant (other than a Board Member
or an Officer) shall also cease to be a Participant (and his spouse shall also
cease to be a Covered Dependent) as of the earliest of

               (a)    the date on which the Plan terminates as provided in
                      Section 12.2;

               (b)    the date on which the Participant (other than a Board
                      Member or an Officer) or his spouse fails to satisfy the
                      eligibility criteria of the Plan; or

               (c)    the date on which his election to receive medical care
                      under this Plan terminates or expires according to its
                      written terms.

        Subject to Section 12.2, a Spouse shall receive coverage under the Plan
for her life.

        A Covered Dependent (other than a Spouse and the spouse of a Participant
who is neither a Board Member nor an Officer) shall receive coverage under the
Plan until his or her Participant reaches his 65th birthday; provided, however,
that notwithstanding anything in this Plan to the contrary, a Covered Dependent
(other than a Spouse and the spouse of a Participant who is neither a Board
Member nor an Officer) shall also cease to be a Covered Dependent as of the
earliest of:

               (a)    the date on which the Plan terminates as provided in
                      Section 12.2;

               (b)    the date on which the Covered Dependent fails to satisfy
                      the eligibility criteria of the Plan; or

               (c)    the date on which his election to receive medical care
                      under this Plan terminates or expires according to its
                      written terms.

                                       8
<PAGE>   17

        3.4    USERRA REINSTATEMENT RULES.

               (a)    This Plan shall provide any health benefits otherwise
                      available to Eligible Employees, if any, in accordance
                      with USERRA and this Section, effective with respect to
                      Military Leaves that began on or after October 13, 1994.

               (b)    The maximum period of Plan coverage available to an
                      Eligible Employee and his Dependents under this Section
                      will not exceed the lesser of (i) eighteen months or (ii)
                      the period ending on the day after the date upon which the
                      person fails to apply for a return to a position of
                      employment under section 4312(a) of USERRA. The period of
                      Plan coverage available under this Section shall begin on
                      the date on which the person's qualifying absence begins.

               (c)    Only for purposes of determining eligibility for medical
                      benefits and only if the Eligible Employee pays all
                      amounts that the Employer is permitted to charge under
                      USERRA for coverage while on a qualifying leave, an
                      Eligible Employee who experiences a reduction in hours or
                      termination of employment solely due to a Military Leave
                      shall be deemed to continue to be an employee until the
                      earliest date that the termination of his Plan benefits is
                      permitted by USERRA and this Section.

        3.5    FMLA COMPLIANCE.

               (a)    This Plan shall provide any health benefits otherwise
                      available to Eligible Employees, if any, in accordance
                      with FMLA for Eligible Employees.

               (b)    Unless an Eligible Employee chose not to retain health
                      coverage, the Employer must maintain medical coverage
                      under the Plan, if any, for such an Eligible Employee on
                      FMLA leave for the duration of his FMLA leave, at the
                      level and under the conditions that coverage would have
                      been provided if the Eligible Employee had continued
                      working and had not taken a FMLA leave.

               (c)    An Eligible Employee on FMLA leave shall have the same
                      opportunity as active employees to change Plan coverage,
                      such as from single coverage to family coverage on the
                      birth of a child, as required by FMLA.

               (d)    The Employer's obligation to continue to maintain health
                      coverage under FMLA and this Section ends on the earliest
                      of the following dates:

                      (1)    the date the Eligible Employee informs the Employer
                             of his intent not to return from a FMLA leave;

                                       9
<PAGE>   18

                      (2)    the date the Eligible Employee's employment
                             relationship would be terminated but for the FMLA
                             leave (such as during a reduction in force);

                      (3)    the date the Eligible Employee fails to return from
                             the FMLA leave; or

                      (4)    the date the Eligible Employee fails to pay a
                             required employee contribution when due.

               (e)    Former Participants who lose eligibility during a FMLA
                      leave will have their benefits reinstated upon their
                      return at the end of the FMLA leave at the same levels as
                      were provided to them under the Plan when their FMLA leave
                      began, but subject to any changes in benefit levels that
                      may have occurred during the leave that affected the
                      entire work force. Participants returning from FMLA leave
                      shall not be required to requalify for any benefits.

        3.6    REINSTATEMENT OF FORMER PARTICIPANT. A former Participant who
again meets the eligibility requirements under Section 3.1 will receive medical
coverages and benefits under the Plan and become a Participant in this Plan
again on the first day the former Participant satisfies the requirements of
Section 3. 1, unless the former Participant is (i) reinstated as a Participant
in the Plan as provided by Sections 3.4 and 3.5 or (ii) declines participation
as provided under Section 3.2.

        3.7    NO ELIGIBILITY DISCRIMINATION DUE TO HEALTH. The Plan shall not
establish rules for eligibility (including continued eligibility) for any
individual under the Plan that are based on one or more Health Status-Related
Factors of the individual or his Dependent.

        3.8    SPECIAL ENROLLMENTS.

               (a)    Notwithstanding any provision to the contrary, an Eligible
                      Individual or an eligible Dependent of an Eligible
                      Individual may elect health care coverage under Special
                      Enrollment, but only if

                      (1)    the Eligible Individual (or the eligible Dependent)
                             was covered under a group health plan or health
                             insurance at the time coverage was offered under
                             this Plan;

                      (2)    the Eligible Individual (or the eligible Dependent)
                             declined coverage under the Plan in writing for the
                             stated reason that he had the other health
                             coverage;

                      (3)    the Eligible Individual (or the eligible Dependent)
                             has "Exhausted COBRA Coverage" or the other health
                             coverage (or the individual's former employer's
                             contribution toward the cost of such coverage) has
                             terminated; and

                                       10
<PAGE>   19

                      (4)    the Eligible Individual (or the eligible Dependent)
                             requests Special Enrollment under this Section in
                             writing within thirty (30) days after the date he
                             or she lost his or her other health coverage.

                      For purposes of this Plan, a person shall be treated as if
                      they have "Exhausted COBRA Coverage" if that individual's
                      COBRA coverage ceased for any reason other than either
                      failure of the individual to pay premiums on a timely
                      basis or for cause (such as making a fraudulent claim or
                      an intentional misrepresentation of a material fact in
                      connection with the plan). A person has "Exhausted COBRA
                      Coverage" if the COBRA coverage ceases because either (a)
                      the employer or other responsible entity fails to remit
                      the premiums on a timely basis, or (b) the individual no
                      longer resides in the service area of an HMO or a similar
                      program (whether or not within the choice of the
                      individual) and there is no other COBRA coverage available
                      to the individual.

               (b)    Special Enrollment must be offered to Dependents if. (a)
                      the Plan offers Dependent coverage, (b) the Eligible
                      Individual is a Participant under the Plan or has met the
                      Waiting Period and is eligible for coverage but for his
                      failure to enroll during a previous enrollment period, and
                      (c) the Dependent became a new Dependent as -a result of
                      marriage, birth, adoption or being Placed for Adoption. A
                      thirty (30) day Special Enrollment period shall be offered
                      to such Dependent beginning on the later of (i) the date
                      Dependent coverage is made available or (ii) the date of
                      marriage, birth, adoption or being Placed for Adoption, as
                      the case may be. If a Special Enrollment period is offered
                      to a new Dependent under the Plan, the Eligible Individual
                      who has the new Dependent may also enroll under the Plan
                      during that Special Enrollment period if he is not already
                      a Participant.

        Coverage that is timely elected during a Special Enrollment period shall
be effective (i) if due to loss of coverage, on the first day of the month after
receipt of the completed enrollment request under the Plan, (ii) if due to
birth, on the date of birth, (iii) if due to adoption or being Placed for
Adoption, the date it occurred and (iv) if due to marriage, on the first day of
the month after receipt of the completed enrollment request under the Plan. A
person who enrolls during a Special Enrollment period is not a Late Enrollee.

                                   ARTICLE IV

                    ELECTION TO RECEIVE MEDICAL CARE BENEFITS

        4.1    ELECTION OF BENEFIT OPTIONS. An Eligible Individual shall be
deemed to have elected to receive medical care coverages and benefits under the
Plan as described in the Policy in effect on his Enrollment Date. If no Policy
is in effect on his Enrollment Date, an Eligible Individual will be deemed to
have elected to receive medical coverage and benefits under the

                                       11
<PAGE>   20

Plan as described in the Policy in effect immediately prior to his Enrollment
Date. An Eligible Individual who declined participation during an Enrollment
Period will become a Participant in the subsequent Enrollment Period, if any,
during which he does not refuse to become a Participant.

        4.2    ELECTION PROCEDURE. An Eligible Individual may decline to
participate in this Plan by filing a properly completed election form with the
Administrator.

        4.3    NO PREMIUM DISCRIMINATION DUE TO HEALTH. The Plan shall not
require an individual (as a condition of enrollment or continued enrollment
under the Plan) to pay a premium or otherwise contribute an amount which exceeds
the amount paid by a similarly situated individual solely due to a Health Status
- Related Factor of the individual; provided, however, that the rules regarding
Health Status-Related Factors do not restrict the amount an Employer may charge
for coverage or prevent premium discounts or rebates or modified deductibles and
co-payments in return for adherence to programs of health promotion and disease
prevention.

                                   ARTICLE V

                              MEDICAL CARE BENEFITS

        5.1    BENEFITS. The Administrator shall offer to each Eligible
Individual, at the time he becomes eligible under ARTICLE III and at each
subsequent Enrollment Period applicable to that Eligible Individual, if any, the
opportunity to participate in the Plan. Subject to SECTION 12.1, the specific
coverages and benefits available to Participants are set forth in the Policy or
if there is no Policy, in the Policy last in effect in connection with the Plan.
The benefits and coverages under this Plan shall continue for the lifetime of
each Board Member, each Officer and each Spouse.

        5.2    PRE-EXISTING CONDITIONS.

               (a)    PRE-EXISTING CONDITIONS. The Plan will not pay any
                      benefits for the care or treatment of pre-existing
                      conditions (as defined in the Policy) for the period of
                      time set forth in the Policy; provided, however, that (i)
                      notwithstanding anything in this Plan or any Policy to the
                      contrary, a pre-existing condition in the Policy shall not
                      include any condition that does not fall within the
                      definition of a Pre-existing Condition, (ii) no
                      pre-existing condition shall include a condition for which
                      Genetic Information was used as a basis for asserting the
                      existence of the condition if there has been no diagnosis
                      of the condition related to such information, and (iii)
                      the period during which any exclusion or limitation of
                      benefits (relating to a condition based on the fact that
                      the condition was present before a person's Enrollment
                      Date) in the Plan or the Policy will be enforced shall not
                      be longer than the excess of twelve (12) months (eighteen
                      (18) months for a Late Enrollee), beginning on his
                      Enrollment Date, over the aggregate

                                       12
<PAGE>   21

                      of the periods of Creditable Coverage (if any) applicable
                      to the Participant as of his Enrollment Date.

                      For purposes of this subsection, a period of Creditable
                      Coverage shall not be counted, with respect to enrollment
                      of an individual under the Plan, if, after such period and
                      before his Enrollment Date, there was a 63 -day period for
                      all of which the individual was not credited with
                      Creditable Coverage. However, any period that an
                      individual is required to wait before becoming covered
                      under the Plan pursuant to the Policy or ARTICLE III shall
                      not be taken into account in determining the continuous
                      63-day period described in the preceding sentence.

                      The individual seeking to become a Participant and who
                      seeks to establish a period of Creditable Coverage must
                      obtain and provide to the Administrator a written
                      certification from the prior health insurance plan or the
                      prior health insurance issuer regarding each period of
                      Creditable Coverage of the individual under such prior
                      health insurance plan and COBRA continuation provisions.
                      Such certification should detail the Waiting Period, if
                      any, imposed with respect to the individual for any
                      coverage under such other health insurance plan. If a
                      written certification cannot be produced, Creditable
                      Coverage may be demonstrated through the presentation of
                      other documentation or through other means satisfactory to
                      the Administrator.

               (b)    EXCLUSION NOT APPLICABLE TO CERTAIN NEWBORNS. The Plan
                      shall not impose any pre-existing condition exclusion (as
                      defined in the Policy) in the case of an individual who,
                      as of the last day of the thirty (30) day period beginning
                      with the date of birth, is covered under Creditable
                      Coverage. However, this exclusion shall no longer apply to
                      an individual after the end of the first 63-day period
                      during all of which the individual was not covered under
                      any Creditable Coverage.

               (c)    EXCLUSION NOT APPLICABLE TO CERTAIN ADOPTED CHILDREN. The
                      Plan shall not impose any pre-existing condition exclusion
                      (as defined in the Policy) in the case of a child who is
                      adopted or Placed for Adoption before attaining eighteen
                      (18) years of age and who, as of the last day of the
                      thirty (30) day period beginning on the date of the
                      adoption or Placement of Adoption, is covered under
                      Creditable Coverage. The previous sentence shall not apply
                      to coverage before the date of such adoption or Placement
                      for Adoption. However, this exclusion shall no longer
                      apply to an individual after the end of the first 63-day
                      period during all of which the individual was not covered
                      under any Creditable Coverage.

               (d)    EXCLUSION NOT APPLICABLE TO PREGNANCY. The Plan shall not
                      impose any exclusion relating to pregnancy as a
                      pre-existing condition.

                                       13
<PAGE>   22

               (e)    NOTICE OF CREDITABLE COVERAGE. The Administrator or its
                      designee shall provide written certification of Creditable
                      Coverage to any individual whose coverage terminates under
                      the Plan (i) at the time of the Qualifying Event or other
                      termination of coverage, (ii) at the time COBRA coverage
                      ceases, and (iii) upon any written request made by an
                      individual not later than twenty-four (24) months after
                      his Plan coverage ceased. The written certification will
                      include (i) the date the certificate is issued, (ii) the
                      name of the plan that provided the coverage, (iii) the
                      name of the participant and/or dependents to whom the
                      certificate applies, (iv) the name, address, and telephone
                      number of the plan administrator, (v) the telephone number
                      of the person to contact for additional information, and
                      (vi) either (a) a statement that the individual has at
                      least 18 months of Creditable Coverage without a 63-day
                      break in coverage, or (b) state (A) the Waiting Period (if
                      any) imposed on the individual for coverage under the
                      plan, (B) the date coverage began, and (C) the date
                      coverage ended (or indicate if it is continuing).

               (f)    NOTICE TO INDIVIDUAL OF PRE-EXISTING CONDITION EXCLUSION.
                      After the Plan receives a Creditable Coverage certificate
                      from a prior plan, the Plan will make a determination and
                      notify individuals within a reasonable period of time
                      regarding the length of any Pre-Existing Condition
                      Exclusion period that applies to them. If no Pre-Existing
                      Condition Exclusion applies to the individual, the Plan
                      will not send a notice. The notice shall explain the basis
                      of the Plan's determination, including the source and
                      substance of any information that the Plan relied on, and
                      the Plan's appeal procedures.

        5.3    NOTIFICATION OF ENROLLMENT RIGHTS. All Eligible Individuals shall
be provided with a notice of his or her enrollment rights in writing at or
before the time the Eligible Individual elects to enroll, and such notification
shall be substantially in the same form as provided in Temp. Treas. Reg.ss.
54.9801-6T(c) and Interim U.S. Department of Labor Regulations.2590.701-6(c).

        5.4    NEWBORNS' AND MOTHERS' HEALTH PROTECTION ACT OF 1996.
Notwithstanding the precertification requirements of the Plan to the contrary,
the Plan shall provide maternity care benefits in accordance with the Newborns'
and Mothers' Health Protection Act of 1996 (the "Newborns' Act"), effective on
the date specified in the Newborns' Act. In accordance with the Newborns' Act,
the Plan shall provide benefits for a minimum of 48 hours of inpatient hospital
stay following a normal vaginal delivery and a minimum of 96 hours of inpatient
hospital stay following caesarean section delivery unless the health care
provider and the mother agree that discharge from the hospital shall occur
earlier.

        5.5    MENTAL HEALTH PARITY ACT OF 1996. In accordance with the Mental
Health Parity Act of 1996, the lifetime maximum limit and the annual maximum
limit on mental health benefits under the Plan shall be at least equal to the
lifetime maximum limit and the annual

                                       14
<PAGE>   23

maximum limit, respectively, for medical and surgical benefits under the Plan,
unless one or more of the exceptions set forth in the Mental Health Parity Act
of 1996 apply

        5.6    WOMEN'S HEALTH AND CANCER RIGHTS ACT OF 1998. Medical and
surgical benefits provided for mastectomies under the Plan will be provided in
accordance with the Women's Health and Cancer Rights Act of 1998 (the "Women's
Health Act"). In accordance with the Women's Health Act, coverage will be
provided for the following:

               (a)    reconstruction of the breast on which the mastectomy has
                      been performed;

               (b)    surgery and reconstruction of the other breast to produce
                      a symmetrical appearance; and

               (c)    prostheses and coverage for any complications in all
                      stages of mastectomy, including lymphedema.

                                   ARTICLE VI

                 PAYMENT OF MEDICAL CARE EXPENSE REIMBURSEMENTS

        6.1    CLAIMS PROCEDURE. Participants and Covered Dependents seeking
benefits under the Plan shall follow the claims procedures established by the
Policy under which they are covered, if any, at the time and the procedures set
forth in SECTION 11.9. Notwithstanding the claim filing procedures established
by this Plan or the applicable Policy, the Health Care Financing Administration
shall have three years from the date a claim is filed to seek recovery of a
mistaken payment when this Plan should have paid as the "Primary Plan" and
Medicare should have paid as the "Secondary Plan" pursuant to ARTICLE VII.

        6.2    REIMBURSEMENT OF EXPENSES. All Qualified Medical Expenses of a
Participant or Covered Dependent that are covered under the Policy shall be
reimbursed as set forth in the Policy.

                                  ARTICLE VII

                            COORDINATION OF BENEFITS

        7.1    EXPLANATION. When a Participant is covered under this Plan and by
one or more other Group Plans, the benefits of this Plan shall be coordinated
and determined in accordance with the provisions of this Article. This Article
is intended to prevent the payment of medical benefits which exceed expenses.
Determination of benefits shall be made in relation to the services furnished to
a Participant during any one calendar year.

                                       15
<PAGE>   24

        7.2    DEFINITIONS. The following definitions apply to this Article.

               (a)    "Group Plan" means any group or group-type arrangement of
                      coverage whether insured or uninsured which provides
                      health benefits or services to a Participant (including
                      the Policy under this Plan), either by indemnity or
                      prepaid services, by means of (i) group or blanket
                      insurance, (ii) franchise insurance that terminates upon
                      cessation of employment, (iii) group hospital or medical
                      service plans and other group prepayment coverage, or (iv)
                      any coverage under labor-management trusteed arrangements,
                      union medical arrangements, employer organization
                      arrangements, government benefit arrangements or
                      government programs (excluding Medicare).

               (b)    "Allowable Expenses" means any necessary, reasonable, and
                      customary item of expense for health care when the item of
                      expense is covered at least in part by one or more Group
                      Plans covering the Participant for whom claim is made. An
                      Allowable Expense does not include (i) differences between
                      the cost of an average semiprivate hospital room and a
                      private hospital room unless the private hospital room is
                      medically necessary (as defined in the Policy), or (ii)
                      the amount of any reduction in benefits because a
                      Participant does not comply with the Group Plat)
                      provisions.

               (c)    "Primary Plan" means the Group Plan whose benefits for a
                      Participant's health care coverage must be determined
                      without consideration of the existence of any other plan.

               (d)    "Secondary Plan" means a Group Plan which is not a Primary
                      Plan. If a Participant is covered by more than one
                      Secondary Plan, the order of benefit determination rules
                      decide the order in which their benefits are determined in
                      relation to each other.

        7.3    COORDINATION OF BENEFITS PROCEDURE. Without regard to what is
stated in the Policy, this Plan determines its order of benefits using the first
of the following rules which applies:

               (a)    The benefits of a Group Plan which covers the Participant
                      (on whose expenses the claim is based) other than as a
                      Dependent shall be determined before the benefits of a
                      Group Plan which covers the Participant as a Dependent.

               (b)    The benefits of a Group Plan which covers the Participant
                      (on whose expenses the claim is based) as a Dependent of a
                      person whose birthday occurs earlier in a calendar year
                      shall be determined before the benefits of a Group Plan
                      which covers such Participant as a Dependent of a person
                      whose birthday occurs later in a calendar year. However,
                      if either Group Plan does not have the provisions of this
                      subsection (b) and the omission results either in each
                      Group Plan determining its benefits before the other,

                                       16
<PAGE>   25

                      or in each Group Plan determining its benefits after the
                      other, the provisions of this subsection (b) shall not
                      apply, and the rule set forth in the other Group Plan
                      shall determine the order of benefits; provided, however,
                      that notwithstanding anything to the contrary in the Plan,
                      in the case of a Participant for whom claim is made as a
                      Dependent child:

                      (1)    When the parents are separated or divorced and the
                             parent with custody of the child has not remarried,
                             the benefits of a Group Plan which covers the child
                             as a Dependent of the parent with custody of the
                             child will be determined before the benefits of a
                             Group Plan which covers the child as a Dependent of
                             the parent without custody.

                      (2)    When the parents are divorced and the parent with
                             custody of the child has remarried, the benefits of
                             a Group Plan which covers the child as a Dependent
                             of the parent with custody shall be determined
                             before the benefits of a Group Plan which covers
                             that child as a Dependent of the stepparent, and
                             the benefits of a Group Plan which covers that
                             child as a Dependent of the stepparent will be
                             determined before the benefits of a Group Plan
                             which covers that child as a Dependent of the
                             parent without custody.

                      (3)    Notwithstanding subparagraphs (1) and (2) of this
                             subsection (b), when the parents are divorced or
                             separated and there is a court decree which would
                             otherwise establish financial responsibility for
                             the health care expenses of the child, the benefits
                             of a Group Plan which covers the child as a
                             Dependent of the person with such financial
                             responsibility shall be determined before the
                             benefits of any other Group Plan which covers the
                             child as a Dependent.

               (c)    When subsections (a) and (b) above do not establish an
                      order of benefits determination, the benefits of a Group
                      Plan which has covered the Participant (on whose expenses
                      the claim is based) for the longer period of time shall be
                      determined before the benefits of a Group Plan which has
                      covered such Participant for the shorter period of time,
                      except that:

                      (1)    The benefits of a Group Plan covering the
                             Participant (on whose expenses the claim is based)
                             as a laid-off or retired employee or as a Dependent
                             of such a Participant shall be determined after the
                             benefits of any other Group Plan covering such
                             Participant as an employee other than as a laid-off
                             or retired employee or a dependent of such a
                             person; and

                      (2)    If either Group Plan does not have a provision
                             regarding laid-off or retired employees and as a
                             result each Group Plan determines its

                                       17
<PAGE>   26

                      benefits after the other, the provisions of this
                      subsection (c) do not apply.

               (d)    When another Group Plan is a Primary Plan under the order
                      of benefit determination rules contained in this Article
                      but such Group Plan contains "excess" or "always
                      secondary" provisions, the Group Plan which has been in
                      force for the longest period of time will be the Primary
                      Plan.

               (e)    When this Plan is the Secondary Plan, the benefits of the
                      other Group Plan shall be deducted from the charges for
                      all items of Allowable Expenses for which any benefit is
                      provided under this Plan or the other Group Plan and this
                      Plan will pay the remainder of the charges for such items;
                      provided, however, that in no event shall the provisions
                      of this Article be construed to increase the amount of
                      total benefits which would be available under the Plan in
                      the absence of another Group Plan.

               (f)    If this Plan is the Secondary Plan under this Article, but
                      is unable to determine the benefits of the other Group
                      Plan, this Plan may estimate in good faith the benefits of
                      the other Group Plan and provide the benefits of this Plan
                      on the basis of that estimate. Payment under this
                      subsection shall constitute full discharge of the
                      liability of the Plan for the charges involved, subject
                      only to adjustment in the event the Plan later determines
                      the actual benefits of the other Group Plan.

        7.4    EXISTENCE OF OTHER GROUP PLANS. This Plan assumes no obligation
to discover the existence of another Group Plan or the benefits available under
it if discovered. This Plan will give effect to the provisions of this Article
in accordance with information furnished it by an authoritative source. This
Plan shall, however, be entitled to obtain and to release such information as
reasonably necessary to give effect to these provisions without the consent of
or notice to any person, and any person claiming benefits under this Article
shall, as a condition precedent to his right of recovery, furnish to the Plan
full information concerning the existence of other Group Plans, their benefits,
and any other information as may be necessary to implement this Article.

        7.5    RECOVERY AND PAYMENT OF BENEFITS. The Plan shall be entitled at
any time to recover benefits paid in excess of its obligation determined under
the provisions of this Article, irrespective of to whom such benefits were paid,
from an issuer, insurer, provider under the other Group Plan, hospital,
physician or other provider, any person or firm to (or for) whom such payment
was made, or from any combination of such sources.

        When benefits have been paid under another Group Plan, the Plan shall
have the right, in its discretion, to pay to the issuer or provider of such
other Group Plan any portion of the benefits available under this Plan which the
Plan may determine to be due in order to give effect to the intent of this
Article and corresponding coordination of benefits provisions in such other
Group Plan. The amount so paid shall be deemed to be benefits provided under
this Plan and to the extent the Plan shall be fully discharged from liability.

                                       18
<PAGE>   27

        7.6    COORDINATION WITH MEDICARE, MEDICAID AND CHAMPUS. The term "Group
Plan" as used in this Article includes Medicare, Medicaid and CHAMPUS, and the
statutes, regulations, and other laws governing these programs take precedence
over the order of determination set forth in this Plan.

        Any Participant eligible for Medicare has the following rights to
coordinate the coverage under this Plan with Medicare coverage and should see
the Administrator to determine what elections may be available with respect to
primary and secondary Medicare coverage and to obtain election forms.

               (a)    AGE SIXTY-FIVE (65) AND OLDER. Individuals and their
                      eligible spouses age sixty-five (65) or older are entitled
                      to receive the same Plan benefits, under the same
                      conditions, as those Individuals and Covered Dependents
                      under age sixty-five (65). The Plan is the Primary Plan
                      and Medicare is the Secondary Plan unless the Participant
                      elects otherwise, as set forth below.

               (b)    DISABLED INDIVIDUALS AND COVERED DEPENDENTS. Individuals
                      and their Covered Dependents who become eligible for
                      Medicare by reason of disability rather than by age (even
                      though they are not sixty-five (65) years of age) are
                      entitled to the same Plan benefits, under the same
                      conditions, as other Participants. The Plan is the Primary
                      Plan and Medicare is the Secondary Plan with respect to
                      these disabled persons.

               (c)    PARTICIPANTS WITH END STAGE RENAL DISEASE. Participants
                      who are medically determined to have end stage renal
                      disease (as defined by Medicare) are entitled to the same
                      Plan benefits, under the same conditions, as other
                      Participants for the first thirty (30) month period
                      following the earlier of (i) initiation of renal dialysis,
                      or (ii) eligibility for Medicare benefits due to such
                      condition. The Plan is the Primary Plan and Medicare is
                      the Secondary Plan with respect to these Participants.

               (d)    MEDICARE ELECTION NOTICE. Each Individual who is eligible
                      for Medicare upon attainment of age sixty-five (65) must
                      complete a Medicare Election Notice Form notifying the
                      Employer that they want Medicare as the Primary Plan with
                      this Plan as the Secondary Plan.

                      If the Individual's spouse is age sixty-five (65) or
                      older, such spouse will also be subject to the
                      Individual's election of the Primary Plan.

               (e)    COORDINATION WITH MEDICARE. Subject to the above
                      provisions and to the extent permitted by Medicare,
                      medical benefits payable under this Plan will be
                      coordinated with Medicare. Such coordination will apply
                      whether or not the Participant has or has not applied for
                      or is receiving Medicare.

               (f)    MEDICAID BENEFICIARY. When enrolling an individual or
                      making any payments for medical benefits to a Participant
                      or on a Participant's behalf,

                                       19
<PAGE>   28

                      the Plan shall not take into account the Participant's
                      eligibility for medical assistance or benefits payable
                      under a plan under 42 U.S.C.ss. 1396, et seq.

                      The effective date for this subsection (f) was October 1,
                      1993.

        7.7    SUBROGATION. If a Participant incurs charges for any sickness,
injury or other condition through the acts or omissions of another person or
organization, the Plan shall pay the medical benefits which are medically
necessary and provided by this Plan, subject to the following conditions:

               (a)    The Participant shall advise the Administrator of any
                      claim against a third party or insurance carrier within
                      sixty (60) days of the occurrence of the sickness or
                      injury, shall provide the Plan with any information
                      necessary to pursue its rights and shall cooperate with
                      the Administrator and shall do whatever is necessary to
                      secure those rights. The Participant agrees to do nothing
                      which would prejudice those rights;

               (b)    The Plan shall be subrogated, to the extent of payments
                      made for medical benefits, to all of the Participant's
                      rights of recovery of those medical benefits against any
                      person or organization who, by reason of such person's
                      acts or omissions, is responsible for the sickness or
                      injury in question;

               (c)    It is agreed that if the Participant fails to take the
                      necessary legal action to recover from a responsible party
                      within one (1) year after the date of the sickness or
                      injury, the Plan may proceed in the name of the
                      Participant against the responsible party and will be
                      entitled to the recovery of the amount of medical benefits
                      paid and the expenses for that recovery;

               (d)    The Plan will have a lien against the proceeds of a
                      settlement or judgment resulting from a Participant's
                      claim or suit against a third party in an amount equal to
                      all sums paid by the Plan with respect to the illness or
                      injury in question, regardless of whether the proceeds of
                      such settlement or judgment are designated as payment for
                      other specified damages. The Employer shall be entitled to
                      notify third parties, including insurance carriers, of
                      this lien. The Employer may deduct the amount covered by
                      the lien from any future claims payable to the Participant
                      if the lien has not been previously satisfied or the
                      Participant fails to notify the Employer of payment
                      received from the third party; and

               (e)    The Participant must agree in writing, prior to his
                      entitlement to medical benefits:

                      (1)    To reimburse the Plan for medical benefits paid
                             under the Plan immediately upon receipt of any
                             damages collected from a third party, whether
                             pursuant to judgment, settlement or otherwise, net
                             of reasonable expenses incurred in collecting such
                             amount, such as

                                       20
<PAGE>   29

                             reasonable attorneys' fees, and any amounts which
                             are allocated under the terms of any judgment for
                             payment of unreimbursed medical expenses;

                      (2)    To execute and deliver such instruments and do
                             whatever else is reasonably necessary to secure the
                             Plan's right to reimbursement of medical payments
                             and to provide the Plan such information as is
                             necessary to enforce its rights under this
                             provision;

                      (3)    To agree to a credit against payments to be made
                             under the Plan in the future equal to the amount of
                             any damages collected by the Participant from a
                             third party, less any amount paid to the Plan;

                      (4)    If a covered person fails to comply with these
                             requirements, he will not be eligible to receive
                             any further medical benefits under the Plan until
                             he complies; and

                      (5)    The Plan has the right to intervene at its own
                             expense in any suit or other proceeding to protect
                             these reimbursement rights. The Participant is
                             responsible for all fees and expenses of the
                             attorney handling his or her claim against the
                             third party.

In the event the Plan recovers an amount greater than the medical benefit paid,
the excess over the expenses of recovery will be paid to the Participant. The
Plan reserves the right to compromise the amount of its claim if, in its
opinion, it is appropriate to do so.

        The Administrator may, in its sole discretion, elect not to enforce this
provision.

                                  ARTICLE VIII

                          TERMINATION OF PARTICIPATION

        8.1    LIMITATION ON COVERED EXPENSES. In the event that an individual
ceases to be a Participant or Covered Dependent in this Plan for any reason, the
individual (or his estate) shall be entitled to reimbursement only for Qualified
Medical Expenses incurred and submitted for reimbursement (following the date
the expense was incurred) in accordance with the terms of the Policy, but only
if the expense was incurred while the individual was a Participant or Covered
Dependent, and only if the individual (or his estate) applies for such
reimbursement in the time and manner provided in the Policy. Except to the
extent required in Article IX, no such reimbursement shall exceed the coverage
limitations provided by the Policy.

        8.2    DATE OF POLICY COVERAGE TERMINATION. Coverage provided by a
Policy shall terminate according to the terms of the Policy unless continued
pursuant to SECTION 3.4, SECTION 3.5, or ARTICLE IX. Termination of a Policy
shall not terminate this Plan or its obligations.

                                       21
<PAGE>   30

                                   ARTICLE IX

                       CONTINUATION COVERAGE UNDER "COBRA"

        9.1    SPECIAL DEFINITIONS. For purposes of this Article, the following
terms shall have the meaning given them as follows:

               (a)    "Qualified Beneficiary" means any individual who was the
                      spouse of a Participant or the dependent child of a
                      Participant whose expenses were eligible for reimbursement
                      under the Plan on the day before a Qualifying Event,
                      unless that individual was entitled to benefits under
                      Title XVIII of the Social Security Act on the day before
                      the Qualifying Event. Notwithstanding anything to the
                      contrary in the preceding sentence, the term "Qualified
                      Beneficiary" shall also include a child who is born to, or
                      Placed for Adoption with the Participant during the COBRA
                      continuation period as determined under SECTION 9.6.

                      (1)    In the case of a Qualifying Event described in
                             SECTION 9.1(b)(2), the term "Qualified Beneficiary"
                             also includes the Participant, unless the
                             Participant is not an employee or was entitled to
                             benefits under Title XVIII of the Social Security
                             Act on the day before the Qualifying Event.

                      (2)    In the case of a Qualifying Event described in
                             SECTION 9.1(b)(6), the term "Qualified Beneficiary"
                             includes a Participant who had retired on or before
                             the date of substantial elimination of coverage
                             under this Plan and any other individual who on the
                             day before such Qualifying Event was a beneficiary
                             under this Plan as a spouse, surviving spouse or
                             dependent child of the Participant.

               (b)    "Qualifying Event" means any of the following events which
                      would result in the loss of coverage under this Plan for a
                      Qualified Beneficiary:

                      (1)    The death of the Participant,

                      (2)    The termination of the Participant's employment
                             with an Employer (for reasons other than the
                             Participant's gross misconduct), the reduction of
                             hours of the Participant's employment, or a
                             Participant's notice to the Administrator he will
                             not return to work from a leave of absence under
                             FMLA,

                      (3)    The divorce or legal separation of the Participant,

                      (4)    The Participant's becoming entitled to benefits
                             under Title XVIII of the Social Security Act,

                                       22
<PAGE>   31

                      (5)    A dependent child ceasing to be a dependent child
                             under this Plan, or

                      (6)    A proceeding under Title II of the United States
                             Code with respect to the Employer from whose
                             employment the Participant retired at any time.

        9.2    ENTITLEMENT TO CONTINUATION COVERAGE.

               (a)    Notwithstanding any other provision of this Plan, a
                      Qualified Beneficiary who would otherwise lose coverage
                      under this Plan as a result of a Qualifying Event is
                      entitled to elect continuation coverage from the Employer
                      under this Plan.

               (b)    The continuation coverage will consist of coverage which,
                      as of the time the coverage is being provided, is
                      identical to the coverage provided under the Plan to
                      similarly situated beneficiaries under the Plan with
                      respect to whom a Qualifying Event has not occurred. If
                      coverage under the Plan is modified for any group of
                      similarly situated beneficiaries, coverage will be
                      modified in the same manner for the Qualified
                      Beneficiaries.

               (c)    The continuation coverage provided in this Article will
                      not be conditioned upon or discriminate on the basis of
                      lack of evidence of insurability.

        9.3    NOTICE REQUIRED.

               (a)    At the time that coverage commences under this Plan,
                      Participants and their spouses, if any, shall be given
                      written notice of their rights under this Article.

               (b)    The Employer of any affected Participant shall notify the
                      Administrator of any Qualifying Event described in SECTION
                      9.1(b)(1), (2), (4) or (6) within thirty (30) days after
                      the date of such Qualifying Event.

               (c)    Each Qualified Beneficiary shall notify the Administrator
                      of the occurrence of a Qualifying Event described in
                      SECTION 9.1(b)(3) or (5) within sixty (60) days after the
                      later of the date of such Qualifying Event or the date as
                      of which the Qualified Beneficiary would otherwise lose
                      coverage under the Plan as a result of that Qualifying
                      Event. If the Qualified Beneficiary fails to notify the
                      Administrator of such a Qualifying Event within such sixty
                      (60) day period, such Qualified Beneficiary shall forfeit
                      his right to elect continuation coverage under this
                      Article.

               (d)    Any Qualified Beneficiary who is determined, under Titles
                      II or XVI of the Social Security Act, to have been
                      disabled at any time during the first sixty (60) days of
                      continuation coverage that began as a result of a

                                       23
<PAGE>   32

                      Qualifying Event described in SECTION 9.1(b)(2) shall so
                      notify the Administrator within sixty (60) days of such
                      determination; provided, however, that such notice must
                      occur in any event before the expiration of the initial
                      eighteen (18) month period following the Qualifying Event.
                      In addition, such Qualified Beneficiary shall notify the
                      Administrator within thirty (30) days of any final
                      determination that he is no longer disabled.

               (e)    Within fourteen (14) days after the Administrator is
                      notified of a Qualifying Event, the Administrator shall
                      notify any Qualified Beneficiary of his or her rights
                      under this Article. Notice to a Qualified Beneficiary who
                      is the spouse or former spouse of a Participant will be
                      treated as notice to all other Qualified Beneficiaries
                      residing with such spouse at the time such notice is
                      given.

        9.4    ELECTION OF CONTINUATION COVERAGE. Any Qualified Beneficiary who
desires continuation coverage under this Plan must make an election during the
applicable "election period" which begins on the date coverage would otherwise
terminate under the Plan by reason of a Qualifying Event, and ends sixty (60)
days after such date or sixty (60) days after the date the Qualified Beneficiary
receives notice of his or her fight to elect continuation coverage, whichever is
later. Unless specified otherwise in the election, any election by a Participant
or spouse to continue coverage under this Plan shall be deemed to be an election
of continuation coverage on behalf of any other Qualified Beneficiary who would
otherwise lose coverage under the Plan by reason of the same Qualifying Event.

        9.5    PREMIUMS. The Qualified Beneficiary may be required to pay
premiums for any period of continuation coverage up to one hundred two percent
(102%) of the applicable premium, as defined under and determined in accordance
with Code section 498013(f)(4) and ERISA section 604; provided, however, that
notwithstanding the foregoing, that a Qualified Beneficiary who is entitled to
extended coverage under SECTION 9.6(a)(1)(A) may be required to pay premiums up
to one hundred fifty percent (150%) of the applicable premium for the coverage
period following the initial eighteen (18) month period. Premiums shall be
payable in monthly installments on the first day of every month; provided,
however, that the premium payment for the period of coverage prior to the date
of the participant's initial election shall not be required prior to forty-five
(45) days after the date of the election.

        9.6    PERIOD OF CONTINUATION COVERAGE. Continuation of coverage timely
and properly elected by any Qualified Beneficiary under this Article shall
extend for a period that begins on the date of the Qualifying Event, and ends on
the earliest of the following dates:

               (a)    Maximum Period.

                      (1)    In the case of a Qualifying Event described in
                             SECTION 9.1(b)(2), the date which is eighteen (18)
                             months after the date of the Qualifying Event;
                             provided, however,

                             (A)    if the Qualified Beneficiary is. determined
                                    to have been disabled at any time during the
                                    first 60 days of continuation

                                       24
<PAGE>   33

                                    coverage following the Qualifying Event
                                    under Titles 11 or XVI of the Social
                                    Security Act, and if the Qualified
                                    Beneficiary has timely notified the
                                    Administrator of such determination in
                                    accordance with SECTION 9.3(d), the maximum
                                    period for that Qualified Beneficiary and
                                    the covered members of the Qualified
                                    Beneficiary's family shall end on the
                                    earlier of (i) the date which is 29 months
                                    after the date of the Qualifying Event, or
                                    (ii) the first day of the month commencing
                                    more than thirty (30) days after a final
                                    determination that the Qualified Beneficiary
                                    is no longer disabled;

                             (B)    if another Qualifying Event, other than the
                                    one described in SECTION 9.1(b)(6), occurs
                                    during such eighteen (18) month period, the
                                    date which is thirty-six (36) months after
                                    the date of the original Qualifying Event;
                                    and

                      (2)    In the case of a Qualifying Event described in
                             Section 9.1(b)(2) that occurs less than 18 months
                             after the date the Covered Individual became
                             entitled to benefits under Article XVIII of the
                             Social Security Act, the period of coverage for
                             Qualified Beneficiaries other than the Participant
                             shall not terminate before the date which is
                             thirty-six (36) months after the date the
                             Participant became entitled to benefits under Title
                             XVIII of the Social Security Act, regardless of
                             whether such entitlement was the sole Qualifying
                             Event or if entitlement preceded the Qualifying
                             Event.

                      (3)    In the case of a Qualifying Event described in
                             SECTION 9.1(b)(6), the date of death of the former
                             Participant; or if the Qualifying Event occurs
                             after the death of the former Participant, the date
                             of death of the surviving spouse of the former
                             participant; or with regard to the surviving spouse
                             or dependent children of a former Participant who
                             dies after the Qualifying Event, the date which is
                             thirty-six (36) months after the date of the former
                             Participant's death.

                      (4)    In the case of any other Qualifying Event, the date
                             which is thirty-six (36) months after the date of
                             the Qualifying Event;

               (b)    The date on which the Employer of the Participant ceases
                      to provide any group health plan to any employee;

               (c)    If a premium is unpaid when due, the date that is thirty
                      (30) days after the first day on which the premium is due
                      under this Plan, or, if later, the date

                                       25
<PAGE>   34

                      on which Participants would lose their coverage under this
                      Plan due to failure to pay premiums when due;

               (d)    The first date after a valid COBRA election is made that
                      the Qualified Beneficiary becomes entitled to benefits
                      under Title XVIII of the Social Security Act; or

               (e)    The first date after a valid COBRA election is made that
                      the Qualified Beneficiary becomes covered under any other
                      group health plan, as an employee or otherwise; provided,
                      however, that in order for this to stop a continuation of
                      coverage period, such other plan may not contain any
                      exclusion or limitation for pre-existing conditions with
                      respect to the Qualified Beneficiary, and provided,
                      however, that for any period commencing after December 31,
                      1996, the coverage provided under a group health plan with
                      respect to a Qualified Beneficiary who has continuation
                      coverage under the Plan shall not be considered to contain
                      any exclusion or limitation with respect to any
                      Pre-Existing Condition of that person by reason of the
                      existence of any limitation or exclusion which does not
                      apply to (or is satisfied by) such person continuing the
                      coverage by reason of Chapter 100 of the Code, part 7 of
                      the subtitle B of Title I of ERISA or Title XXVII of the
                      Public Health Service.

        9.7    EXPIRATION OF CONTINUATION COVERAGE. In the case of any Qualified
Beneficiary whose continuation coverage expires under Section 9.6(a), the
Administrator shall, during the thirty-one (31) day period ending on such
expiration date, provide to the Qualified Beneficiary the option of enrolling in
a conversion plan otherwise generally available to Participants under the Plan,
if any. No conversion coverage shall be available to Participants under this
Plan.

                                    ARTICLE X

                                     FUNDING

        Except for Board Members, Officers and Spouses, the Plan shall be funded
solely by contributions from Participants and Covered Dependents. In the case of
a Board Member, an Officer or a Spouse, notwithstanding anything in the Plan or
any other agreement to the contrary, the Sponsor will pay (i) all of the cost of
all of the Plan's benefits and coverages for that individual for that
individual's lifetime and (ii) to the individual, an additional sum in the
amount necessary to reimburse such individual for any federal income tax
liability resulting from (or associated with) the Sponsor's payments to or for
the benefit of the individual under this Plan, so that the benefits and
coverages under this Plan for that individual are provided at no cost to that
individual.

        The Employers shall have no obligation, but shall have the right, to
establish a special trust or fund out of which benefits shall be paid. The
Employers shall have no obligation, but shall have the right, to reinsure, or to
purchase any type of additional coverage with respect to

                                       26
<PAGE>   35

any benefits under the Plan. To the extent the Employer elects to purchase
insurance for any benefits under the Plan, any such benefits shall be the sole
responsibility of the insurer, and the Employer shall have no responsibility for
the payment of such benefits (except for refunding any Participant contributions
that were not remitted to an insurer).

                                   ARTICLE XI

                                 ADMINISTRATION

        11.1   NAMED FIDUCIARY. The Named Fiduciaries of the Plan shall be the
Administrator, and any insurer or other persons, to the extent of its or their
discretionary authority with regard to the administration of the Plan. Except as
otherwise provided in the Policy, the Administrator shall have complete
authority to control and manage the operation and administration of the Plan.
The Administrator, subject to the succeeding provisions of this ARTICLE XI, is
authorized to take such actions as may be necessary to carry out the provisions
and purposes of the Plan and shall have the authority to control and manage the
operation and administration of the Plan. In order to effectuate the purposes of
the Plan, the Administrator shall have the discretionary power to construe and
interpret the Plan, to supply any omissions therein, to reconcile and correct
any errors or inconsistencies, to decide any questions in the administration and
application of the Plan, and to make equitable adjustments for any mistakes or
errors made in the administration of the Plan. All such actions or
determinations made by the Named Fiduciaries, and the application of rules and
regulations to a particular case or issue by the Named Fiduciaries, in good
faith, shall not be subject to review by anyone, but shall be final, binding,
and conclusive on all persons ever interested hereunder, subject only to the
claims review procedures set forth in SECTION 11.9. In construing the Plan and
in exercising its power under provisions requiring Administrator approval, the
Administrator shall attempt to ascertain the purpose of the provisions in
question and when such purpose is known or reasonably ascertainable, such
purpose shall be given effect to the extent feasible. Likewise, the
Administrator is authorized to determine all, questions with respect to the
individual rights of the Participants or Beneficiaries under this Plan,
including, but not limited to, all issues with respect to eligibility. The Named
Fiduciary in the exercise of any discretionary powers hereunder, shall exercise
such discretion in a uniform manner with respect to all similarly situated
Participants.

        11.2   ALLOCATION OF FIDUCIARY RESPONSIBILITIES. The Administrator may
allocate certain of its fiduciary responsibilities among others and/or may
designate other persons to carry out certain of its fiduciary responsibilities
in accordance with and subject to the limitations of ERISA section 405. Any
person or group of persons may serve in more than one fiduciary capacity with
regard to the Plan. The Administrator and any fiduciary designated by the
Administrator may employ one or more persons to render advice concerning their
responsibilities under the Plan.

        11.3   RECORDS. The Administrator shall exercise such authority as it
deems appropriate in order to comply with the terms of the Plan relating to the
records of Participants and the amounts which are payable under the Plan. The
Administrator shall make available to each

                                       27
<PAGE>   36

Participant such of its records under the Plan as pertain to him for examination
at reasonable times during normal business hours.

        11.4   APPOINTMENT OF COMMITTEE. The day-to-day administration of the
Plan shall be handled by a Committee comprised of at least one individual, if
such a Committee is appointed by the Administrator as its agent. If no Committee
is appointed, the Administrator shall be the Committee. Each member of the
Committee shall serve until his successor is appointed by the Administrator or
until he otherwise resigns. All expenses of the Committee shall be paid by the
Sponsor. A member of the Committee who is an employee shall not receive any
additional compensation for his or her services on the Committee, but shall be
reimbursed by the Sponsor for expenses incurred.

        11.5   ACTIONS OF COMMITTEE. A majority of the members of the Committee
appointed pursuant to Section 11.4 shall constitute a quorum for the transaction
of business, and shall have full power to act hereunder. Action by the Committee
shall be official if approved by a vote of a majority of the members present at
any official meeting. The Committee may, without a meeting, authorize or approve
any action by written instrument signed by a majority of all of the members. Any
written memorandum signed by the Chairman, any other member of the Committee, or
any other person duly authorized by the Committee to act regarding the subject
matter of the memorandum, shall have the same force and effect as a formal
resolution adopted in open meeting.

        A member of the Committee may not vote or decide upon any matter
relating solely to him or vote in any case in which his individual fight or
claim to any benefit under the Plan is specifically involved. If a Committee
member is so disqualified to act and the remaining members then present cannot,
by majority vote, act or decide, the Sponsor will appoint a temporary substitute
member to exercise all of the powers of the disqualified member concerning the
matter in which he is disqualified.

        The Committee shall maintain minutes of its meetings and written records
of its actions. Members may participate and hold a meeting of the Committee by
means of telephone conference or similar communications equipment which permits
all persons participating in the meeting to hear each other; however, minutes
and written records must be maintained of such meeting. Participation in such a
meeting constitutes presence in person at such meeting.

        11.6   OTHER POWERS AND DUTIES OF THE ADMINISTRATOR. The Administrator,
the Committee and any persons or entities designated by the Administrator,
except as otherwise set forth in the Policy, shall have all powers necessary or
desirable to administer the Plan, including, but not limited to, the following:

               (a)    in its sole discretion, to construe and interpret the
                      Plan, reconcile errors and supply omissions in the Plan,
                      and decide all questions of eligibility;

               (b)    to prescribe procedures to be followed by Participants in
                      making elections under the Plan and in filing claims under
                      the Plan;

               (c)    to prepare and distribute information explaining the Plan
                      to Participants;

                                       28
<PAGE>   37

               (d)    to obtain from Participants such information as shall be
                      necessary for the proper administration of the Plan;

               (e)    to keep records of elections, claims, and disbursements
                      for claims under the Plan;

               (f)    to appoint individuals or committees to assist in the
                      administration of the Plan and to engage any other agents
                      it deems advisable, including legal and actuarial counsel;

               (g)    to purchase any insurance deemed necessary for providing
                      benefits under the Plan;

               (h)    to accept, modify, or reject elections under the Plan;

               (i)    to promulgate election forms and claims forms to be used
                      by Participants;

               (j)    to prepare and file any reports or returns regarding the
                      Plan required by the Code, ERISA, or any other laws;

               (k)    to determine and announce any Participant contributions
                      required hereunder;

               (l)    to determine and enforce any limits on benefits elected
                      hereunder;

               (m)    to take such action as may be necessary to cause the
                      payroll deduction of any Participant contributions
                      required hereunder;

               (n)    to, notwithstanding any other provision of the Plan, in
                      the event the Administrator determines that as a result of
                      administrative or arithmetic error, it has, with respect
                      to one or more Individuals, incorrectly determined
                      eligibility for participation, job classification, or
                      other items involving or concerning the continued
                      qualification of the, Plan under the Code, and determines
                      further that such error has resulted in one or more
                      Individuals receiving a smaller (or greater) benefit
                      provided by the Plan than they would have in the absence
                      of the error, take such steps as shall be necessary or
                      appropriate to correct such error with respect to the
                      affected individuals, utilizing whatever method will
                      result in the least overall cost to the Plan; and

               (o)    to recover overpayments erroneously made from the Plan to
                      Participants, Beneficiaries, or others utilizing whatever
                      method will result in the least overall cost to the Plan.

        11.7   INDEMNIFICATION. The Sponsor and the Employers agree to and shall
indemnify and hold harmless each Indemnified Person (as defined in this Section)
from and against any and all claims, losses, damages, causes of action, suits,
and liability of every kind, including all

                                       29
<PAGE>   38

expenses of litigation, court costs and reasonable attorney's fees, incurred in
connection with the Plan. "Indemnified Person" shall mean each member of the
Committee, and each employee, officer, or director of the Sponsor or of an
Employer acting as a fiduciary of the Plan. Such indemnity shall apply
regardless of whether the claims, losses, damages, causes of action, suits, or
liability arise in whole or in part from the negligence or other fault on the
part of the Indemnified Person, except to the extent there has been a final
adjudication that the claim or liability results from the gross negligence or
willful misconduct of the Indemnified Person.

        11.8   RELIANCE ON TABLES, ETC. In administering the Plan, the
Administrator will be entitled, to the extent permitted by law, to rely
conclusively upon all tables, valuations, certificates, opinions and reports
which are furnished by accountants, counsel or other experts employed or engaged
by the Administrator.

        11.9   CLAIMS AND REVIEW PROCEDURES.

               (a)    CLAIMS PROCEDURE. If any person believes he is being
                      denied any rights or benefits under the Plan, such person
                      may file a written claim with the Administrator. If the
                      claim is wholly or partially denied, the Administrator
                      will notify the claimant of its decision in writing. Such
                      notification will be written in a manner calculated to be
                      understood by such person and will contain: (i) specific
                      reasons for the denial, (ii) specific reference to
                      pertinent Plan provisions, (iii) a description of any
                      additional material or information necessary for the
                      person to perfect his claim and an explanation of why such
                      material or information is necessary, and (iv) information
                      as to the steps to be taken if the person wishes to submit
                      a request for review. Notification of a claim denial will
                      be given within ninety (90) days after the claim is
                      received by the Administrator, or within one hundred
                      eighty (180) days if special circumstances require an
                      extension of time for processing the claim, in which case
                      written notice of such extension and the circumstances
                      shall be given to the claimant within the initial ninety
                      (90) day period. If the claimant does not receive written
                      notice that the claim has been denied within the initial
                      ninety (90) day period, or within the one hundred eighty
                      (180) day period, if applicable, the claim will be deemed
                      to have been denied as of the last day of such period, and
                      such person may request a review of his claim.

               (b)    REVIEW PROCEDURE. Within sixty (60) days after the date on
                      which a person receives written notice of a claim denial,
                      or if applicable, within sixty (60) days after the date on
                      which such denial is deemed to have occurred, such person
                      or his duly authorized representative may file a written
                      request with the Administrator for a review of his denied
                      claim. The claimant and/or his authorized representative
                      may inspect pertinent documents and submit written issues
                      and comments to the Administrator. The Administrator will
                      notify the claimant of its decision in writing. Such
                      notification will be written in a manner calculated to be
                      understood by such person and will contain specific
                      reasons for the decision, as well as

                                       30
<PAGE>   39

                      specific references to pertinent Plan provisions. The
                      decision on review will be made within sixty (60) days
                      after the request for review is received by the
                      Administrator, or within one hundred twenty (120) days if
                      special circumstances require an extension of time. If
                      such an extension of time is taken, the Administrator
                      shall notify the claimant in writing within the initial
                      sixty (60) day period and shall state the circumstances
                      and the date on which a decision is expected. If the
                      claimant does not receive written notice of the decision
                      within the initial sixty (60) day period, or within the
                      one hundred twenty (120) day period if applicable, the
                      claim shall be deemed to have been denied on review.

        11.10  PARTICIPANT'S RESPONSIBILITIES. Each Participant shall be
responsible for providing the Administrator and the Sponsor with the
Participant's and his beneficiary's current address. Any notices required or
permitted to be given under this Section shall be deemed given if directed to
such address and mailed by regular United States mail. Neither the Administrator
nor the Sponsor shall have any obligation or duty to locate a Participant or
beneficiary. In the event that a Participant or beneficiary becomes entitled to
a payment under the Plan and such payment is delayed or cannot be made because:

               (a)    the current address according to Sponsor records is
                      incorrect;

               (b)    the Participant or beneficiary fails to respond to the
                      notice sent to the current address according to Sponsor
                      records;

               (c)    of conflicting claims to such payments; or

               (d)    of any other reason.

The amount of such payment, if and when made, shall be that determined under the
provisions of the Plan without consideration of any interest which may have
accrued.

        11.11  MISSING PERSONS. If any amount becomes payable under the Plan to
a Participant or beneficiary and the same shall not have been claimed, or if any
check issued under the Plan remains uncashed, and reasonable care shall have
been exercised by the Administrator in attempting to make such payments, the
amount shall be forfeited within such period as is necessary to prevent escheat
under any applicable law and shall cease to be a liability of the Plan.

        11.12  NONDISCRIMINATORY EXERCISE OF AUTHORITY. In the administration of
the Plan, whenever any discretionary action by the Administrator is required,
the Administrator shall exercise its authority in a nondiscriminatory manner in
order that all persons similarly situated will receive substantially the same
treatment.

        11.13  EXPENSES. The Employer shall bear all costs and expenses
associated with the administration of this Plan which are not paid by an
established trust, if any.

                                       31
<PAGE>   40

                                   ARTICLE XII

                        AMENDMENT OR TERMINATION OF PLAN

        12.1   AMENDMENT OF PLAN. The Sponsor expressly reserves the right to
amend the elections, terms and conditions of the Plan, if necessary; provided,
however, that without the express, prior written consent of each Participant and
Covered Dependent at the time the amendment is signed (or, if earlier, is
effective), no amendment to this Plan shall reduce the coverages available or
benefits payable under the Plan or decrease the individuals who may be
Participants or Covered Dependents under this Plan. Any amendment that is
necessary with respect to the Plan and permitted under this Section shall be
made only by a written instrument signed by the appropriate person or persons
and shall be binding upon and effective with respect to each Employer and its
Participants, Dependents, and Eligible Individuals.

        12.2   TERMINATION OF PLAN. The Sponsor may terminate or discontinue
this Plan at any time, if necessary, only by a written instrument signed by its
authorized officer and only with the express, prior written consent of all
Participants and Covered Dependents at the effective date of the termination or
discontinuation. Notwithstanding anything in the Plan to the contrary, coverages
and benefits provided under this Plan are to be continued for the life of each
Board Member, each Officer and each Spouse, and the Plan and the Sponsor's
obligations under the Plan may not be terminated or discontinued without the
express, prior written consent of each Board Member, Officer and Spouse. Upon
termination or discontinuance of the Plan as permitted by this Section, all
elections shall terminate, and reimbursements or payments of Qualified Medical
Expenses shall be made only in accordance with ARTICLE VI.

                                  ARTICLE XIII

                                  MISCELLANEOUS

        13.1   INFORMATION TO BE FURNISHED. Participants shall provide the
Employer and Administrator with such information and evidence as may reasonably
be requested from time to time for the purpose of administering the Plan.

        13.2   LIMITATION OF RIGHTS. Neither the establishment of the Plan, nor
any amendment of the Plan, nor the payment of any benefits shall be construed as
giving to any Participant or other person any legal or equitable right against
the Employer or Administrator or their respective officers and directors, as an
employee or otherwise, except as expressly provided in this Plan, and in no
event will the terms of employment or service of any Participant or employee be
modified or in any way affected by this Plan.

        13.3   BENEFITS NOT SOLELY FROM POLICY. Except as required by law,
applicable regulation or elsewhere in this Plan, the benefits provided under the
Plan shall be paid solely from the Policy so long as there is a Policy. If there
is no Policy, benefits payable under this Plan shall be paid from the general
assets of the Sponsor. Nothing in this Plan shall be construed to

                                       32
<PAGE>   41

require (except as required by law and applicable regulation) any Fiduciary or
the Administrator to maintain any fund or segregate any amount for the benefit
of any Participant.

        13.4   NONASSIGNABILITY OF RIGHTS. The right of any Participant to
receive any reimbursement under the Plan shall not be alienable by the
Participant by assignment or any other method and shall not be subject to being
taken by his creditors by any process whatsoever, and any attempt to cause such
right to be so subjected will not be recognized, except to such extent as may be
required by law.

        13.5   NO GUARANTEE OF TAX CONSEQUENCES. Neither the Employer nor the
Administrator makes any commitment or guarantee that any amounts paid to or for
the benefit of a Participant under ARTICLES V or VI will be excludable from the
Participant's gross income for federal or state income employment tax purposes,
or that any other federal or state tax treatment will apply to or be available
to any Participant. It shall be the obligation of each Participant to determine
whether each payment under ARTICLES V or VI is excludable from the Participant's
gross income for federal and state income and employment tax purposes, and to
notify the Employer if the Participant has reason to believe that any such
payment is not so excludable.

        13.6   SEVERABILITY. If any provision of this Plan is held invalid,
unenforceable or inconsistent with any law, regulation or requirement for a
medical plan governed by Code sections 104 or 105 or ERISA, its invalidity,
unenforceability or inconsistency shall not affect any other provision of the
Plan, and the Plan shall be construed and enforced as if such provision were not
a part of the Plan.

        13.7   CONSTRUCTION OF TERMS. Words of gender shall include persons and
entities of any gender, the plural shall include the singular and the singular
shall include the plural. Section headings exist for reference purposes only and
shall not be construed as part of the Plan.

        13.8   CHOICE OF LAW/JURISDICTION AND VENUE. THIS PLAN SHALL BE
CONSTRUED, ADMINISTERED, AND GOVERNED IN ALL RESPECTS (i) UNDER APPLICABLE
FEDERAL LAW, INCLUDING, WITHOUT LIMITATION, THE PROVISIONS OF ERISA AND THE CODE
AND RELEVANT INTERPRETATIONS OF BOTH, AND (ii) TO THE EXTENT NOT PREEMPTED BY
FEDERAL LAW, UNDER THE LAWS OF THE STATE OF TEXAS. EXCLUSIVE JURISDICTION AND
VENUE OF ALL DISPUTES ARISING OUT OF OR RELATING TO THIS PLAN SHALL BE IN ANY
COURT OF APPROPRIATE JURISDICTION IN DALLAS COUNTY, TEXAS. THE PROVISIONS OF
THIS SECTION SHALL SURVIVE AND REMAIN IN EFFECT UNTIL ALL OBLIGATIONS ARE
SATISFIED, NOTWITHSTANDING ANY TERMINATION OF THE PLAN.

        13.9   NO VESTED INTEREST. Except for the right to receive any benefit
payable under the Plan in regard to a previously incurred claim, no person shall
have any right, title, or interest in or to the assets of any Employer because
of the Plan.

        13.10  NO GUARANTEE OF EMPLOYMENT. Nothing in this Plan shall be
construed as a (i) contract of employment between an Employer and any
Individual, (ii) guarantee that any

                                       33
<PAGE>   42

Individual will be continued in the employment or service of an Employer, or
(iii) limitation on the right of an Employer to discharge any of its employees
with or without cause.

        13.11  ADOPTION BY SUCCESSOR EMPLOYER OR AFFILIATES. In the event of the
reorganization, purchase, merger, dissolution, or reconstitution, whether direct
or indirect, of the Sponsor, any successor entity shall be required to adopt and
continue the Plan; in which event, the Plan shall continue without any gap or
lapse in coverage or benefits. Failure of the Sponsor to obtain such assumption
and agreement prior to the effectiveness of any such succession shall be a
breach of this agreement and shall entitle the Participants and Covered
Dependents at that time to a lump sum payment from the Sponsor as liquidated
damages that will be an amount equal to the sum of (i) the total value of the
coverages and benefits under the Plan to such individual and (ii) the cost to
obtain identical (or better) replacement coverage for Plan coverage for such
individual.

        The Sponsor shall pay to each Participant and Covered Dependent all
legal fees and expenses incurred by that individual, if any, in seeking to
obtain or enforce any right, coverage or benefit provided by this Agreement. An
individual entitled to a payment under this Section shall not be required to
mitigate the amount of a payment due to him under this Section, and
notwithstanding anything in the Plan to the contrary, payments due under this
Section shall not be reduced by any coverage or benefits received by a payment's
recipient from any other source. Throughout the Plan, a purposeful distinction
is drawn between the Sponsor and the Employers. The powers and responsibilities
assigned to the Sponsor by the Plan shall apply exclusively to the Sponsor.

        13.12  BONDING. Every Fiduciary, except a bank or an insurance company,
unless exempted by ERISA and its regulations, shall be bonded in an amount not
less than 10% of the amount of the funds such Fiduciary handles; provided,
however, that the minimum bond shall be $1,000 and the maximum bond, $500,000.
The amount of funds handled shall be determined at the beginning of each Plan
Year by the amount of funds handled by such person, group, or class to be
covered and their predecessors, if any, during the preceding Plan Year, or if
there is no preceding Plan Year, then by the amount of the funds to be handled
during the then current year. The bond shall provide protection to the Plan
against any loss by reason of acts of fraud or dishonesty by a Fiduciary alone
or in connivance with others. The surety shall be a corporate surety company (as
such term is used in section 412(a)(2) of ERISA), and the bond shall be in a
form approved by the Secretary of Labor. Notwithstanding anything in the Plan to
the contrary, the cost of such bonds shall be an expense of and may, at the
election of the Administrator, be paid by the Employer.

                                   ARTICLE XIV

                     QUALIFIED MEDICAL CHILD SUPPORT ORDERS

        14.1   NOTIFICATION OF RECEIPT OF CHILD SUPPORT ORDER. Upon receipt by
the Administrator of a medical child support order, an administrative notice, or
a National Medical Support Notice as set forth in ERISA, the Administrator shall
tell the Participant and the

                                       34
<PAGE>   43

potential alternate recipient of the medical child support order, administrative
notice or National Medical Support Notice that it has received the medical child
support order, administrative notice, or National Medical Support Notice within
fifteen (15) days of the Administrator's receipt of the medical child support
order, administrative notice, or National Medical Support Notice. The
notification shall also describe the procedures for determining whether the
medical child support order, administrative notice, or National Medical Support
Notice is a "Qualified Medical Child Support Order"as defined in section 609 of
ERISA. The procedures shall permit a potential alternate recipient to designate
a representative to receive copies of notices with respect to a medical child
support order, administrative notice, or National Medical Support Notice.

        The Administrator shall determine if the medical child support order,
the administrative notice or the National Medical Support Notice is a Qualified
Medical Child Support Order within sixty (60) days of receipt of such order or
notice, unless circumstances cause a delay. If a delay is required, the
potential alternate recipient shall be notified of any such delay in writing.

        14.2   PROCEDURES TO DETERMINE IF MEDICAL CHILD SUPPORT ORDER IS A
QUALIFIED MEDICAL CHILD SUPPORT ORDER. The Administrator shall review the
medical child support order, the administrative notice, or the National Medical
Support Notice (or request legal counsel to review the medical child support
order, administrative notice or National Medical Support Notice) and verify that
the following items are appropriately addressed in the medical child support
order, administrative notice, or National Medical Support Notice:

               (a)    The medical child support order, administrative notice or
                      National Medical Support Notice must create or recognize
                      the existence of an alternate recipient's right to receive
                      benefits for which the Participant or beneficiary is
                      eligible under the Plan or to assign those rights;

               (b)    The medical child support order, administrative notice or
                      National Medical Support Notice must identify the parties
                      responsible for paying for the benefits that are the
                      subject of the order, notice or National Medical Support
                      Notice;

               (c)    The medical child support order, administrative notice, or
                      National Medical Support Notice must clearly specify the
                      name and last known mailing address of each alternate
                      recipient covered by the order, administrative notice or
                      National Medical Support Notice or must provide the name
                      and address of any state official or political subdivision
                      that will be substituted for that of the alternate
                      recipient. Payment made to any such selected official
                      shall be treated as payment made to the alternate
                      recipient;

               (d)    The medical child support order, administrative notice, or
                      National Medical Support Notice must specify in a
                      reasonable description the type of coverage to be provided
                      by the Plan to each alternate recipient or the manner in
                      which the type of coverage is to be determined;

                                       35
<PAGE>   44

               (e)    The medical child support order, administrative notice or
                      National Medical Support Notice must specify the period to
                      which the order, administrative notice or National Medical
                      Support Notice applies;

               (f)    The medical child support order, administrative notice, or
                      National Medical Support Notice must not require the Plan
                      to provide any type or form of benefit not otherwise
                      provided under the Plan; and

               (g)    The medical child support order, administrative notice or
                      National Medical Support Notice must clearly be an order,
                      administrative notice, judgment, decree, approval of a
                      settlement or a National Medical Support Notice.

        If the Administrator determines the medical child support order,
administrative notice or National Medical Support Notice satisfies all of the
above requirements, the medical child support order, administrative notice or
National Medical Support Notice shall, subject to SECTION 14.4, be a Qualified
Medical Child Support Order, and the Administrator shall notify, in writing,
each of the alternate recipient(s) or the alternate recipient(s)' selected
official or political subdivision, if applicable, and the Participant or
beneficiary related to such alternate recipient(s) that the order,
administrative notice, or National Medical Support Notice is a Qualified Medical
Child Support Order. The Administrator shall also notify the Participant that he
must execute a new enrollment form to cover the cost of such coverage or
otherwise notify the party responsible for paying for the coverage of their
obligations with respect to payment for the coverage. If the Administrator
determines that the order or administrative notice, or National Medical Support
Notice is not a Qualified Medical Child Support Order, the Administrator shall
notify, in writing, each of the proposed alternate recipient(s) or the alternate
recipient(s)' selected official or political subdivision, if applicable, and the
related Participant or beneficiary that the order, administrative notice, or
National Medical Support Notice is not a Qualified Medical Child Support Order,
why the order, administrative notice or National Medical Support Notice failed
to qualify as such and their rights, if any, to appeal such decision.

        14.3   TREATMENT OF ALTERNATE RECIPIENT UNDER QUALIFIED MEDICAL CHILD
SUPPORT ORDER. The Administrator shall treat each alternate recipient under a
Qualified Medical Child Support Order as a Participant under the Plan, but only
for purposes of the reporting and disclosure requirements imposed by ERISA.

        14.4   COST OF QUALIFIED MEDICAL CHILD SUPPORT ORDER BENEFITS. The cost
of the coverage provided under the Qualified Medical Child Support Order shall
be paid by the party designated as responsible for paying for such coverage in
the order, administrative notice or National Medical Support Notice.

        In the event a medical child support order, administrative notice, or
National Medical Support Notice does not specify the party responsible for
payment for the alternate recipient's coverage under the medical child support
order, administrative notice, or National Medical Support Notice, the
Administrator shall either deny the medical child support order's,
administrative notice's, or National Medical Support Notice's qualified status
and send copies of

                                       36
<PAGE>   45

the Qualified Medical Child Support Order procedures to the parties, or file an
appropriate pleading in either the Federal district court or in the domestic
relations court requesting revisions of the issued order, administrative notice
or National Medical Support Notice in such a manner as to qualify the order,
administrative notice, or National Medical Support Notice as a Qualified Medical
Child Support Order.

        14.5   QUALIFIED MEDICAL CHILD SUPPORT ORDER AND MEDICAID. The
Administrator shall not consider the alternate recipient's eligibility for
Medicaid when enrolling the alternate recipient in the Plan. The Plan shall
comply with the alternate recipient's assignment rights under Medicaid, if any.

        14.6   PAYMENTS OR REIMBURSEMENTS UNDER A QUALIFIED MEDICAL CHILD
SUPPORT ORDER. The Administrator is permitted to pay or reimburse the alternate
recipient, the alternate recipient's custodial parent, or any state official or
political subdivision selected by the alternate recipient to receive payments
for any benefit payments due under the Plan to or on behalf of the alternate
recipient.

        14.7   ALTERNATE RECIPIENT. "Alternate recipient" means the individual
designated as the person entitled to receive health care coverage under the
Qualified Medical Child Support Order.

                                   ARTICLE XV

                                     POLICY

        The Policy set forth on Exhibit A to this Plan is incorporated by this
reference as part of the Plan document. Any amendment or replacement of any of
the documents comprising the Policy may be certified by a duty authorized
officer of the Sponsor, and may be updated as required, without any need to
amend this document. But, to the extent any part of the Policy conflicts with or
contradicts the provisions of this document, this document shall govern in
determining (i) the rights of Participants, their Covered Dependents and, if
any, their other covered beneficiaries, and (ii) the obligations of the
Employers, Administrator, and any Fiduciary to Participants, Covered Dependents
and, if any, other covered beneficiaries.

                                  ARTICLE XVI

                             PARTICIPATING EMPLOYERS

        16.1   ADOPTION BY OTHER EMPLOYERS. Notwithstanding anything in this
document to the contrary, with the written consent of the Sponsor, any other
corporation or entity, whether an affiliate or subsidiary or not, may adopt this
Plan and become a Participating Employer, by a properly executed document
evidencing said intent and will of such Participating Employer. Participating
Employers who have adopted the Plan are listed on Exhibit B to this Plan, as it
may be amended from time to time.

                                       37
<PAGE>   46

        16.2   REQUIREMENTS OF PARTICIPATING EMPLOYERS.

               (a)    The transfer of any Participant from or to an Employer
                      participating in this Plan, whether he be an employee of
                      the Sponsor or a Participating Employer, shall not affect
                      such Participant's rights under the Plan, and his length
                      of participation in the Plan shall continue to his credit.

               (b)    Any expenses of the Plan which are to be paid by the
                      Employer or borne by the Plan shall be paid by each
                      Participating Employer in the same proportion that the
                      total number of all Participants employed by such Employer
                      bears to the total number of all Participants.

        16.3   DESIGNATION OF AGENT. Each Participating Employer shall be deemed
to be a part of this Plan-, provided, however, that with respect to all of its
relations with the Administrator for the purpose of this Plan, each
Participating Employer shall be deemed to have designated irrevocably the
Sponsor as its agent.

        16.4   TRANSFERS. It is anticipated that an Individual who is an
employee may be transferred between Participating Employers, and in the event of
any such transfer, the employee involved shall carry with him his accumulated
service and eligibility. No such transfer shall effect a termination of
employment under this Plan, and the Participating Employer to which the employee
is transferred shall become obligated under this Plan with respect to such
employee in the same manner as was the Participating Employer from whom the
employee was transferred.

        16.5   PARTICIPATING EMPLOYER'S CONTRIBUTION. All contributions made by
a Participating Employer, as provided for in this Plan, shall be determined
separately by each Participating Employer and shall be paid for the exclusive
benefit of the employees of such Participating Employer and the Beneficiaries of
such employees, subject to all the terms and conditions of this Plan. On the
basis of the information furnished by the Employers to the Administrator, the
Administrator shall keep separate books and records concerning the Plan affairs
of each Participating Employer and as to the accounts and credits of the
employees of each Participating Employer. The Administrator may, but need not,
register contracts so as to evidence that a particular Participating Employer is
the interested Employer, but in the event of an employee transfer from one
Participating Employer to another, the employing Employer shall immediately
notify the Administrator.

        16.6   DISCONTINUANCE OF PARTICIPATION. Any Participating Employer shall
be permitted to discontinue or revoke its participation in the Plan. At the time
of any such discontinuance or revocation, satisfactory evidence of such action
and of any applicable conditions imposed shall be delivered to the
Administrator. The Administrator shall thereafter transfer, deliver and assign
the contracts and other assets allocable to the Participants of such
Participating Employer to such new Administrator as shall have been designated
by such Participating Employer, in the event that it has established a separate
medical care plan for its employees. If no successor is designated, the
Administrator shall retain such assets for the employees of said Participating
Employer. In no such event shall any part of the corpus or income of the Trust
as it relates to

                                       38
<PAGE>   47

such Participating Employer be used for or diverted for purposes other than for
the exclusive benefit of the employees of such Participating Employer.

        16.7   ADMINISTRATOR'S AUTHORITY. The Administrator shall have authority
to make any and all necessary rules or regulations, binding upon all
Participating Employers and all Participants, to effectuate the purpose of this
Article.

        IN WITNESS WHEREOF, the Corporation has caused this Plan to be executed
in its name and on its behalf this 23rd day of June, 2000 authorized
representative.

                                        "SPONSOR"

                                        DALLAS SEMICONDUCTOR CORPORATION

                                        By:    /s/ Alan P. Hale
                                            ------------------------------------

                                        Title: V. P. Finance & CFO

                                       39
<PAGE>   48

                                    EXHIBIT A

                                     POLICY

                                       40
<PAGE>   49

                                    EXHIBIT B

                             PARTICIPATING EMPLOYERS

                                       41
<PAGE>   50

                                    EXHIBIT C

                                    OFFICERS

C. V. Prothro
Chao C. Mai
Michael L. Bolan
Alan P. Hale
Jack Von Gillern

                                       42
<PAGE>   51

                                    EXHIBIT D

                                  BOARD MEMBERS

Richard L. King

Merlyn D. Sampels

Carmelo J. Santoro

Adm. E.R. Zumwalt, Jr.

                                       43
<PAGE>   52

                                    EXHIBIT E

                                     SPOUSES

Nancy J. Santoro

Anita R. Sampels

Carolyn Leftwich

Karen L. Hale

Shao S. Mai

Caren H. Prothro

Elizabeth L. Von Gillern

                                       44
<PAGE>   53

                                    EXHIBIT F

                               ELIGIBLE EMPLOYEES
                              (OTHER THAN OFFICERS)

Matt Adams

Philip A. Adams

G. Malcom Bayless

Heber L. Clement

Met Cruz

Stephen M. Curry

Don Dias

Jeffrey L. Hannon

Tom Harrington, III

David L. Heim

Jerry L. Housden

Joe Hundt

Reynold W. Kelm

Hal Kurkowski

Robert D. Lee

John E. Manton, III

Wayne Mendenhall

Kenneth B. Molitor

Joe Monroe

David J. Rapier

John Rea

Sandy Scherpenberg

Michael D. Smith

Gay T. Vencill

Clark R. Williams

                                       45
<PAGE>   54

                                AMENDMENT ONE TO

                      THE DALLAS SEMICONDUCTOR CORPORATION

                         EXECUTIVES RETIREE MEDICAL PLAN

        Amendment made to the Dallas Semiconductor Corporation Executives
Retiree Medical Plan, Effective October 1, 1999 (the "Plan"), by Dallas
Semiconductor Corporation (the "Corporation").

                               W I T N E S S E T H

        WHEREAS, the Corporation sponsors the Plan to provide retiree (and
limited other) medical care benefits to board members, officers, certain other
eligible retirees, and the eligible spouses of board members and officers; and

        WHEREAS, the Corporation desires to amend the Plan to permit the spouse
of Richard King, Carol Edgar, to participate in the Plan, effective June 24,
2000, the date of their marriage; and

        WHEREAS, by the terms of Section 12.1 of the Plan, the Plan may be
amended by the Corporation.

        NOW, THEREFORE, effective June 24, 2000, the Plan is hereby amended as
follows:

        1.     Section 2.37 is deleted in its entirety and the following is
substituted in its place:

                      "2.37 'SPOUSE' means the wife of an Officer or of a Board
               Member on the date of his Retirement, and in the case of only
               Richard King, means Carol Edgar, effective June 24, 2000. Carol
               Edgar, effective June 24, 2000 and each person who was a spouse
               of an Officer or of a Board Member on the Effective Date are
               listed on Exhibit E, but being listed on Exhibit E does not make
               an individual a Spouse for purposes of this Plan."

        2.     Existing Exhibit E to the Plan is deleted in its entirety, and
the attached Exhibit E is substituted in its place.

<PAGE>   55

        IN WITNESS WHEREOF, the Corporation, has caused this instrument to be
executed by its duly authorized officer on this 23rd day of June, 2000, to be
effective June 24, 2000.

                                    DALLAS SEMICONDUCTOR CORPORATION

                                    BY:     /S/ ALAN P. HALE
                                        ----------------------------------------

                                    Title: Vice President - Finance and Chief
                                           Financial Officer

                                       2
<PAGE>   56

                                    EXHIBIT E

                                     SPOUSES

Nancy J. Santoro

Anita R. Sampels

Carolyn Leftwich

Karen L. Hale

Shao S. Mai

Caren H. Prothro

Elizabeth L. Von Gillern

Carol Edgar

                                       3
<PAGE>   57

                                AMENDMENT TWO TO
                      THE DALLAS SEMICONDUCTOR CORPORATION
                         EXECUTIVES RETIREE MEDICAL PLAN

        Amendment made to the Dallas Semiconductor Corporation Executives
Retiree Medical Plan, effective October 1, 1999 (the "Plan"), by Dallas
Semiconductor Corporation (the "Corporation").

                               W I T N E S S E T H

        WHEREAS, the Corporation sponsors the Plan to provide retiree (and
limited other) medical care benefits to board members, officers, certain other
eligible retirees, and the eligible spouses of board members and officers; and

        WHEREAS, the Corporation desires to amend the Plan to clarify that the
Plan will not impose a pre-existing condition limitation; and

        WHEREAS, by the terms of SECTION 12.1 of the Plan, the Plan may be
amended by the Corporation.

        NOW, THEREFORE, effective October 1, 1999, the Plan is hereby amended as
follows:

        1.     SECTION 2.34 is deleted in its entirety, and the following is
substituted in its place:

               "2.34 `QUALIFIED MEDICAL EXPENSE' means an expense incurred by a
               Participant, by the Participant's spouse or by a Dependent of
               such Participant for medical care as defined in Code section 213,
               including, without limitation, amounts paid for hospital bills
               and doctor bills, but only to the extent that (i) the participant
               or other person is not reimbursed for the expense through
               insurance or otherwise, other than under the Plan, and (ii) the
               expense is not taken into account as a deduction by the
               Participant on his Internal Revenue Service Form 1040."

        2.     The second sentence of SECTION 5.1 is deleted in its entirety,
and the following is substituted in its place:

               "Subject to SECTIONS 5.2(A) and 12.1, the specific coverages and
               benefits available to Participants are set forth in the Policy or
               if there is no Policy, in the Policy last in effect in connection
               with the Plan."

        3.     SECTION 5.2(A) is deleted in its entirety, and the following is
substituted in its place:

               "5.2   PRE-EXISTING CONDITIONS.

<PAGE>   58

               (a)    PRE-EXISTING CONDITIONS. Notwithstanding anything in the
                      Plan or any Policy to the contrary, the Plan shall not
                      impose any type of pre-existing condition exclusion.
                      Notwithstanding anything in any Policy to the contrary, a
                      pre-existing condition in a Policy shall not include any
                      condition that does not fall within the definition of a
                      Pre-existing Condition, no pre-existing condition shall
                      include a condition for which Genetic Information was used
                      as a basis for asserting the existence of the condition if
                      there has been no diagnosis of the condition related to
                      such information, and the period during which any
                      exclusion or limitation of benefits (relating to a
                      condition based on the fact that the condition was present
                      before a person's Enrollment Date) in the Policy would be
                      enforced (if the Plan allowed pre-existing condition
                      exclusions) for no longer than the excess of twelve (12)
                      months (eighteen (18) months for a Late Enrollee),
                      beginning on his Enrollment Date, over the aggregate of
                      the periods of Creditable Coverage (if any) applicable to
                      the Participant as of his Enrollment Date."

        5.     The last sentence of SECTION 8.1 is amended to delete the words
"coverage limitations" in that sentence and to substitute "coverage maximums" in
their place.

               IN WITNESS WHEREOF, the Corporation has caused this instrument to
be executed by its duly authorized officer effective October 1, 1999.

                                        DALLAS SEMICONDUCTOR CORPORATION

                                        By:   /s/ Alan P. Hale
                                            ------------------------------------

                                        Title:
                                               ---------------------------------

                                       2
<PAGE>   59

                               AMENDMENT THREE TO

                      THE DALLAS SEMICONDUCTOR CORPORATION

                         EXECUTIVES RETIREE MEDICAL PLAN

        Amendment made to the Dallas Semiconductor Corporation Executives
Retiree Medical Plan, effective October 1, 1999 (the "Plan"), by Dallas
Semiconductor Corporation (the "Corporation").

                               W I T N E S S E T H

        WHEREAS, the Corporation sponsors the Plan to provide retiree (and
limited other) medical care benefits to board members, officers, certain other
eligible retirees, and the eligible spouses of board members and officers; and

        WHEREAS, the Corporation desires to amend the Plan to permit three
Directors appointed after October 19, 1999, Jeffrey A. Koch, John K. Foley and
Larry N. Bright, to participate in the Plan, effective on the date each was
appointed as a Director; and

        WHEREAS, by the terms of Section 12.1 of the Plan, the Plan may be
amended by the Corporation.

        NOW, THEREFORE, effective as provided below, the Plan is amended as
follows:

        1.     SECTION 2.10 is deleted in its entirety, effective October 9,
2000, and the following is substituted in its place:

                       "ELIGIBLE EMPLOYEE" means (i) each Officer of the Sponsor
               on the Effective Date, (ii) each common-law employee of an
               Employer who was designated on the books and records of the
               Employer as a "functionally equivalent" officer on the Effective
               Date and who shared in the contribution made on June 12, 1998, to
               the Dallas Semiconductor Corporation Executive Deferred
               Compensation Plan, (iii) each common-law employee of an Employer,
               on the Effective Date, who, on the Effective Date (or within the
               five (5) calendar year period preceding the Effective Date), also
               held the title of Director or was the Sponsor's corporate
               controller, (iv) effective October 9, 2000, Larry N. Bright, John
               K. Foley and Jeffrey A. Koch, and (v) each common-law employee of
               an Employer, on the Effective Date, who, on the Effective Date,
               held the position of Manager and was required to report for
               operating purposes directly to the Sponsor's President and Chief
               Executive Officer. Each person who was an Eligible Employee on
               the Effective Date or become an Eligible Employee as a result of
               an amendment to the Plan after the Effective Date is listed on
               either Exhibit C or Exhibit F to the Plan."

                                       1
<PAGE>   60

        2.     Effective October 9, 2000, existing Exhibit F is deleted in its
entirety, and the attached Exhibit F is substituted in its place.

        IN WITNESS WHEREOF, the Corporation, has caused this instrument to be
executed by its duly authorized officer on this 10th day of April, 2001.

                                        DALLAS SEMICONDUCTOR CORPORATION

                                        By:    /s/ Alan P. Hale
                                            ------------------------------------

                                        Name:  Alan P. Hale

                                        Title: Chief Financial Officer

                                       2
<PAGE>   61

                                    EXHIBIT F

                               ELIGIBLE EMPLOYEES

                              (OTHER THAN OFFICERS)

                           (EFFECTIVE OCTOBER 9, 2000)

        Matt Adams

        Philip A. Adams

        G. Malcom Bayless

        Larry N. Bright

        Heber L. Clement

        Mel Cruz

        Stephen M. Curry

        Don Dias

        John K. Foley

        Jeffrey L. Hannon

        Tom Harrington, III

        David L. Heim

        Jerry L. Housden

        Joe Hundt

        Reynold W. Kelm

        Jeff Koch

        Hal Kurkowski

        Robert D. Lee

                                       3
<PAGE>   62

        John E. Manton, III

        Wayne Mendenhall

        Kenneth B. Molitor

        Joe Monroe

        David J. Rapier

        John Rea

        Sandy Scherpenberg

        Michael D. Smith

        Gay T. Vencill

        Clark R. Williams

                                       4<PAGE>   1
                                                                   EXHIBIT 10.27

                              ASSUMPTION AGREEMENT

        THIS ASSUMPTION AGREEMENT is executed and delivered pursuant to that
certain Agreement and Plan of Merger, dated as of January 28, 2001 (the "Merger
Agreement"), by and among Maxim Integrated Products, Inc., a Delaware
corporation (the "Company"), MI Acquisition Sub, Inc., a Delaware corporation,
and Dallas Semiconductor Corporation, a Delaware corporation ("Dallas
Semiconductor"), pursuant to which Dallas Semiconductor will become a wholly
owned subsidiary of the Company. Pursuant to Sections 1.8(a) and 5.5(a) of the
Merger Agreement, the Company is required at the Effective Time to expressly
assume all options to purchase the common stock, par value $.02 per share (the
"Common Stock"), of Dallas Semiconductor then outstanding, whether vested or
unvested, under Dallas Semiconductor's (i) 1984 Stock Option Plan, (ii) Amended
1987 Stock Option Plan and (iii) 1993 Officer and Director Stock Option Plan
(each as amended, collectively, the "Option Plans"), and the various option
agreements (the "Option Agreements"), including notice of grants thereto (each a
"Notice"), issued under such Option Plans. By way of example, and not by way of
limitation, a copy of the form of Notice and forms of Option Agreements are
attached hereto as Exhibit A. The failure to attach to this Assumption Agreement
all forms of Notice and all forms of Option Agreements that may be outstanding
shall in no way limit the Company's obligations under Sections 1.8(a) and 5.5(a)
of the Merger Agreement with respect to the assumptions addressed herein. All
capitalized terms not otherwise defined herein shall have the meaning ascribed
to such terms in the Merger Agreement.

        For good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged the Company hereby assumes and agrees to pay,
perform, and discharge in accordance with the terms thereof, all of the duties,
liabilities and obligations of Dallas Semiconductor under the Option Plans, the
Option Agreements and the Notice.

        This Assumption Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and assigns.

      [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS]

<PAGE>   2

        IN WITNESS WHEREOF, each party hereto has caused this instrument to be
executed by its duly authorized officer this the 11th day of April, 2001.

                                        MAXIM INTEGRATED PRODUCTS, INC.

                                        By:     /s/ Carl W. Jasper
                                           -------------------------------------

                                        Name:  Carl W. Jasper
                                        Title: Chief Financial Officer

                                        DALLAS SEMICONDUCTOR CORPORATION

                                        By:     /s/ Alan P. Hale
                                           -------------------------------------

                                        Name:  Alan P. Hale
                                        Title: Chief Financial Officer

                                       2
<PAGE>   3

                                    Exhibit A

                                       3
<PAGE>   4

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and
entered into this ____ day of _____________, 19__ (the "Date of Grant"), by and
between DALLAS SEMICONDUCTOR CORPORATION, a Delaware corporation (the
"Company"), and ________________________, an employee of the Company
("Optionee").

        WHEREAS, the Company desires, by affording Optionee an opportunity to
purchase shares of its Common Stock, par value $.02 per share (the "Common
Stock"), as hereinafter provided, to carry out the purposes of the Dallas
Semiconductor Corporation 1987 Stock Option Plan (the "Plan");

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. The Company hereby grants to Optionee, pursuant to
the Plan, the terms and provisions of which are incorporated herein by
reference, an option (the "Option") to purchase all or any part of ___________
shares of the Common Stock of the Company on the terms and conditions herein set
forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $_____ per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value

                                       4
<PAGE>   5

of such shares as determined by the Board of Directors of the Company (the
"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. Exercise of the Option This Option shall be exercisable in full or in
part at any time, and from time to time, during the term hereof, at any time
after the Date of Grant. No fractional shares may be issued pursuant to the
exercise of this Option. Furthermore, the exercise of this Option shall be
subject to the condition that if at any time the Company shall determine in its
sole discretion that the satisfaction of withholding tax or other withholding
liabilities, or that the listing, registration, or qualification of any shares
otherwise deliverable upon such exercise upon any national securities exchange
or under any state or federal law, or that the report to, or consent or approval
of, any regulatory body, is necessary or desirable as a condition of, or in
connection with, such exercise or the delivery or purchase of shares pursuant
hereto, then in any such event, such exercise shall not be effective unless such
withholding, listing, registration, qualification, report, consent or approval
shall have been effected or obtained free of any conditions not acceptable to
the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for

                                       5
<PAGE>   6

hereinbefore, in which event, the Company shall deliver a certificate or
certificates, as may be requested by Optionee, representing such shares as soon
as practicable after the notice and payment shall be received. The certificate
or certificates for the shares as to which the Option shall have been exercised
shall be registered as designated in the notice. In the event the Option shall
be exercised, pursuant to Paragraph 8 hereof, by any person or persons other
than the Optionee, such notice shall be accompanied by proof deemed appropriate
by the Company of the right of such person or persons to exercise the Option.
All shares that shall be purchased upon the exercise of this Option as provided
herein shall be fully paid and non-assessable.

        6. Non-Transferability. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee, voluntarily or by operation of law, other than by will
or by the laws of descent and distribution. Neither this Option nor the shares
covered hereby shall be pledged or hypothecated in any way. Neither this Option
nor the shares covered hereby shall be subject to the execution, attachment, or
similar process except with the prior written consent of the Board.

        7. Termination of Employment. In the event that Optionee shall at any
time hereafter cease to be an employee of the Company or its subsidiaries for
any reason other than his death, retirement or permanent disability, any part of
the Option granted hereunder which has not been exercised by the date of such
cessation shall immediately terminate on the date of such cessation. In the
event that Optionee's employment with the Company or its subsidiary shall
terminate by reason of his retirement or permanent disability, the Option may be
exercised, to the extent of the shares with respect to which the Option could
have been exercised by Optionee on the date of such termination prior to the
date of its expiration or three (3) months after the date of such termination,
whichever occurs first.

                                       6
<PAGE>   7

        8. Death of Optionee. If Optionee dies prior to the termination of his
right to exercise the Option in accordance with the provisions hereof without
having totally exercised the Option, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of Optionee's death, by the Optionee's estate or by the
person who acquires the right to exercise the Option by bequest, inheritance, or
by reason of the death of the Optionee, provided the Option is exercised prior
to the date of its expiration or one (1) year from the date of the Optionee's
death, whichever occurs first.

        9. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionees.

        10. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a shareholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
does not confer on Optionee any continued right of employment or directorship
with the Company or any additional rights other than as expressly provided for
herein. There is no obligation upon Optionee to exercise this Option or any part
thereof.

        11. Subject to Plan. This option is subject to all of the terms and
conditions of the Company's 1987 Stock Option Plan (and as amended hereafter if
the Plan is amended hereafter). In the event of any conflict between such terms
and conditions and those set forth herein, the terms of the Plan shall govern
and be determinative.

                                       7
<PAGE>   8

        12. Incentive Stock Option. This option is not intended to qualify as an
"incentive stock option" under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        13. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof. Any such action by the Board shall be final and
binding on Optionee.

        14. Shareholder's Agreement. The exercise of this Option is expressly
conditioned upon the prior or contemporaneous execution by the Optionee and the
Company of a Shareholder's Agreement, as provided in the Plan. All rights of the
Optionee and his heirs, successors and assigns shall be determined by such
agreement and the Optionee and his heirs, successors and assigns shall be bound
thereby. The shares of Common Stock issued pursuant to the exercise hereof shall
not be deemed to be issued vested stock option" and shall be subject to the
repurchase rights as provided in such agreement.

        15. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

                                       8
<PAGE>   9

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4350 Beltwood Parkway South
Dallas, Texas 75244
                                        By:
                                              ----------------------------------

                                        Title:
                                              ----------------------------------

------------------------------          ----------------------------------------
                                        Optionee

------------------------------

                                       9
<PAGE>   10

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and
entered into this ____ day of _______________, 19__ (the "Date of Grant"), by
and between DALLAS SEMICONDUCTOR CORPORATION, a Delaware corporation (the
"Company"), and ___________________, an employee of the Company ("Optionee").

        WHEREAS, the Company desires, by affording Optionee an opportunity to
purchase shares of its Common Stock, par value $.02 per share (the "Common
Stock"), as hereinafter provided, to carry out the purposes of the Dallas
Semiconductor Corporation 1987 Stock Option Plan (the "Plan");

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. The Company hereby grants to Optionee, pursuant to
the Plan, the terms and provisions of which are incorporated herein by
reference, an option (the "Option") to purchase all or any part of ______ shares
of the Common Stock of the Company on the terms and conditions herein set forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $_____ per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such

                                       10
<PAGE>   11

determinations shall be binding upon the Optionee. No shares may be issued until
full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. Exercise of the Option. This Option shall be exercisable in full or
in part at any time, and from time to time, during the term hereof, at any time
commencing on the last day of the first completed calendar quarter following the
Date of Grant. No fractional shares may be issued pursuant to the exercise of
this Option. Furthermore, the exercise of this Option shall be subject to the
condition that if at any time the Company shall determine in its sole discretion
that the satisfaction of withholding tax or other withholding liabilities, or
that the listing, registration, or qualification of any shares otherwise
deliverable upon such exercise upon any national securities exchange or under
any state or federal law, or that the report to, or consent or approval of, any
regulatory body, is necessary or desirable as a condition of, or in connection
with, such exercise or the delivery or purchase of shares pursuant hereto, then
in any such event, such exercise shall not be effective unless such withholding,
listing, registration, qualification, report, consent or approval shall have
been effected or obtained free of any conditions not acceptable to the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for

                                       11
<PAGE>   12

hereinbefore, in which event, the Company shall deliver a certificate or
certificates, as may be requested by Optionee, representing such shares as soon
as practicable after the notice and payment shall be received. The certificate
or certificates for the shares as to which the Option shall have been exercised
shall be registered as designated in the notice. In the event the Option shall
be exercised pursuant to Paragraph 10 hereof, by any person or persons other
than the Optionee, such notice shall be accompanied by proof deemed appropriate
by the Company of the right of such person or persons to exercise the Option.
All shares that shall be purchased upon the exercise of this Option as provided
herein shall be fully paid and non-assessable.

        6. Tax Benefit Right. The Compensation Committee (the "Committee") of
the Board may in its sole discretion at any time prior to the exercise of this
Option grant to Optionee a bonus in an amount in cash not to exceed the then
existing maximum statutory Federal income tax rate (including any surtax or
similar charge or assessment) for individual taxpayers multiplied by the amount
of ordinary income, if any, realized by Optionee for Federal income tax purposes
as a result of the exercise of this Option. Any such payment, if granted, shall
be made by the Company upon the due date for such taxes in the form of a check
payable to the Internal Revenue Service for the account of Optionee, or in such
other manner as the Committee in its sole discretion may determine. Any such
payment shall otherwise be made upon such terms and conditions as may from time
to time be determined by the Committee and such right shall be subject to
limitation (as to term, amount, or otherwise) and to cancellation at any time by
the Committee in its sole discretion.

        7. Company Loan. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Company may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option,

                                       12
<PAGE>   13

or any part hereof, over the aggregate par value of such Common Stock, less any
other consideration delivered by Optionee upon such exercise, provided that
Optionee shall execute a promissory note for such amount, payable to the order
of the Company, in such form as is in accordance with the provisions of the Plan
and as is otherwise satisfactory to the Committee.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Committee shall have determined in its sole discretion prior to the
exercise date that such loan should be made, but shall have no such obligation
if the Committee shall have thereafter cancelled or suspended the operation of
the loan provisions of the Plan, or if the loan and/or other loans to be made at
such time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Committee in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Committee and the execution by
Optionee of such stock powers or other instruments which the Committee may deem
necessary or advisable in connection with such loan and creation of such
security interest.

        8. Non-Transferability. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee, voluntarily or by operation of law, other than by will
or by the laws of descent and distribution. Neither this Option nor the shares
covered hereby shall be pledged or hypothecated in any way. Neither this Option
nor the shares covered hereby shall be subject to the execution, attachment, or
similar process except with the prior written consent of the Board.

        9. Termination of Employment. In the event that Optionee shall at any
time hereafter cease to be an employee of the Company or its subsidiaries for
any reason other than his death, retirement or permanent disability, any part of
the Option granted hereunder which has not been

                                       13
<PAGE>   14

exercised by the date of such cessation shall immediately terminate on the date
of such cessation. In the event that Optionee's employment with the Company or
its subsidiary shall terminate by reason of his retirement or permanent
disability, the Option may be exercised, to the extent of the shares with
respect to which the Option could have been exercised by Optionee on the date of
such termination prior to the date of its expiration or three (3) months after
the date of such termination, whichever occurs first.

        10. Death of Optionee. If Optionee dies prior to the termination of his
right to exercise the Option in accordance with the provisions hereof without
having totally exercised the Option, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of Optionee's death, by the Optionee's estate or by the
person who acquires the right to exercise the Option by bequest, inheritance, or
by reason of the death of the Optionee, provided the Option is exercised prior
to the date of its expiration or one (1) year from the date of the Optionee's
death, whichever occurs first.

        11. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionees.

        12. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a shareholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
does not confer on Optionee any continued right of employment or

                                       14
<PAGE>   15

directorship with the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        13. Subject to Plan. This option is subject to all of the terms and
conditions of the Company's 1987 Stock Option Plan (and as amended hereafter if
the Plan is amended hereafter). In the event of any conflict between such terms
and conditions and those set forth herein, the terms of the Plan shall govern
and be determinative.

        14. Incentive Stock Option. This option is not intended to qualify as an
"incentive stock option" under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        15. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof. Any such action by the Board shall be final and
binding on Optionee.

        16. Shareholder's Agreement. The exercise of this Option is expressly
conditioned upon the prior or contemporaneous execution by the Optionee and the
Company of a Shareholder's Agreement, as provided in the Plan. All rights of the
Optionee and his heirs, successors and assigns shall be determined by such
agreement and the Optionee and his heirs, successors and assigns shall be bound
thereby. The shares of Common Stock issued pursuant to the exercise hereof shall
not be deemed to be issued pursuant to a "fully vested stock option" and shall
be subject to the repurchase rights as provided in such agreement.

        17. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

                                       15
<PAGE>   16

Address for Notices:                         DALLAS SEMICONDUCTOR CORPORATION

4350 Beltwood Parkway South
Dallas, Texas 75244
                                             By:
                                                   -----------------------------

                                             Title:
                                                   -----------------------------

-----------------------------------          -----------------------------------
                                             Optionee

-----------------------------------

                                       16
<PAGE>   17

Form of Stock Option Agreement under the 1993 Officer and Director Stock Option
Plan for grants on July 9, 1993, and October 3, 1996, to executive officers and
certain key employees

                                       17
<PAGE>   18

                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT (the "Agreement") is made and entered into
this ____ day of ____________,199__ (the "Date of Grant"), by and between DALLAS
SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and
__________________, [an employee of the Company who has been determined by the
Compensation Committee of the Board of Directors of the Company to hold a
position functionally equivalent to a vice president of the Company (exclusive
of policy-making functions](1) ("Optionee").

        WHEREAS, the Company's 1993 Officer and Director Stock Option Plan (the
"Plan") provides that certain officers of the Company may from time to time be
granted an option to purchase shares of the Company's Common Stock, par value
$.02 per share (the "Common Stock"), as therein provided, in furtherance of the
purposes of the Plan.

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. GRANT OF OPTION. The Company hereby grants to Optionee, pursuant to
Section 7(a) of the Plan, the terms and provisions of which Plan are
incorporated herein by reference, an option (the "Option") to purchase all or
any part of _______ shares of the Common Stock of the Company on the terms and
conditions herein set forth.

----------

(1) Provision used in key employee options granted in 1996

                                       18
<PAGE>   19

        2. PURCHASE PRICE. The purchase price of each share of Common Stock
subject to this Option shall be $_______ per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

        3. TERM OF OPTION. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. EXERCISE OF THE OPTION. Subject to the provisions of Paragraph 14
hereof, this Option shall be exercisable in installments (subject to the right
of accumulation described below) so that this Option shall be exercisable for
25% of the aggregate number of shares provided in Paragraph 1 hereof at the end
of first year of the term hereof and thereafter shall be exercisable for 6.25%
of such aggregate number of shares during each calendar quarter during the term
hereof (until it shall become fully vested at the end of sixteen (16) calendar
quarters from the Date of Grant); provided, however, that this Option, or any
unexercised portion hereof, shall become immediately exercisable in full upon
the occurrence of a Change of Control. To the extent an installment is not
exercised during the time stated, such installment shall accumulate and be
exercisable, in whole or in part, in any subsequent period during the term of
this Option. No fractional shares may be issued pursuant to the exercise of this
Option. Furthermore, the exercise

                                       19
<PAGE>   20

of this Option shall be subject to the condition that if at any time the Company
shall determine in its sole discretion that the satisfaction of withholding tax
or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in connection with, such exercise or the
delivery or purchase of shares pursuant thereto, then in any such event, such
exercise shall not be effective unless such withholding, listing, registration,
qualification, report, consent or approval shall have been effected or obtained
free of any conditions not acceptable to the Company.

        5. NOTICE OF ELECTION. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 10 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

                                       20
<PAGE>   21

        6. TAX BENEFIT RIGHT. The Board may in its sole discretion at any time
prior to the exercise of this Option grant to Optionee a bonus in an amount in
cash not to exceed the then existing maximum statutory Federal income tax rate
(including any surtax or similar charge or assessment) for individual taxpayers
multiplied by the amount of income, if any, realized by Optionee for Federal
income tax purposes as a result of the exercise of this Option. Any such
payment, if granted, shall be made by the Company upon the due date for such
taxes in the form of a check payable to the Internal Revenue Service for the
account of Optionee, or in such other manner as the Board in its sole discretion
may determine. Any such payment shall otherwise be made upon such terms and
conditions as may from time to time be determined by the Board and such right
shall be subject to limitation (as to term, amount, or otherwise) and to
cancellation at any time by the Board in its sole discretion.

        7. COMPANY LOAN. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Board may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the Board.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Board shall have determined in its sole discretion prior to the exercise
date that such loan should

                                       21
<PAGE>   22

be made, but shall have no such obligation if the Board shall have thereafter
canceled or suspended the operation of the loan provisions of the Plan, or if
the loan and/or other loans to be made at such time would exceed any limit on
the maximum amount of loans that may be made under the Plan established from
time to time by the Board in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Board and the execution by Optionee
of such stock powers or other instruments which the Board may deem necessary or
advisable in connection with such loan and creation of such security interest.

        8. NON-TRANSFERABILITY. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee, voluntarily or by operation of law, other than by will
or by laws of descent and distribution. Neither this Option nor the shares
covered hereby shall be pledged or hypothecated in any way. Neither this Option
nor the shares covered hereby shall be subject to the execution, attachment, or
similar process except with the prior written consent of the Board.

        9. TERMINATION OF EMPLOYMENT. In the event that Optionee shall at any
time hereafter cease to be an employee of the Company for any reason other than
his death or retirement, any part of the Option granted hereunder which has not
been exercised by the date of such cessation shall immediately terminate on the
date of such cessation. In the event that Optionee's employment by the Company
shall terminate by reason of his retirement or permanent disability, the Option
may be exercised, to the extent of the shares with respect to which the Option
could have been exercised by optionee on the date of such termination prior to
the date of its expiration or three (3) months after the date of such
termination, whichever occurs first.

                                       22
<PAGE>   23

        10. DEATH OF OPTIONEE. If the Optionee dies prior to the termination of
his right to exercise this Option in accordance with the provisions hereof
without having totally exercised the Option, the Option may be exercised, to the
extent of the shares with respect to which the Option could have been exercised
by Optionee on the date of Optionee's death, by the Optionee's Successor,
provided the Option is exercised prior to the date of its expiration or one (1)
year from the date of the Optionee's death, whichever occurs first.

        11. ADJUSTMENTS. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        12. NO OTHER RIGHTS OR OBLIGATIONS. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered
thereby until the date of the issuance of one or more stock certificates to him
for such shares pursuant to the due exercise of the Option. The granting of this
Option shall not confer on Optionee any continued right to employment or tenure
as an officer of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        13. SUBJECT TO PLAN. This Option is subject to all of the terms and
conditions of the Company's 1993 Officer & Director Stock Option Plan (and as
amended if the Plan is amended hereafter). In the event of any conflict between
such terms and conditions and those set forth herein, the terms of the Plan
shall govern and be determinative.

                                       23
<PAGE>   24

        14. STOCKHOLDER APPROVAL. This Option has been granted subject to the
approval of the Plan by stockholders of the Company. Notwithstanding the
provisions of Paragraph 4 hereof, this Option may not be exercised unless and
until the Plan has been duly approved by the stockholders of the Company.(2)

        15. SHAREHOLDERS AGREEMENT. The shares of Common Stock issued to
Optionee upon the exercise of this Option shall be deemed to be issued pursuant
to a "fully vested stock option" under the terms of any Shareholder's Agreement
previously entered into between the Company and Optionee.

        16. DEFINED TERMS. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Stock Option Agreement as of the date first above written.

Address for Notices:                         DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244                          By:
                                                   -----------------------------
                                                      C. V. Prothro

                                             Title:
                                                   -----------------------------
                                                      Chairman of the Board and
                                                      President

-----------------------------------          -----------------------------------
                                             Optionee

----------

(2) Stockholder approval of the 1993 Officer and Director Stock Option Plan was
obtained on April 26, 1994.

                                       24
<PAGE>   25

-----------------------------------

                                       25
<PAGE>   26

Form of Stock Option Agreement used for grants under the 1993 Officer and
Director Stock Option Plan on October 5, 1998 to employees who were both
officers and directors

                                       26
<PAGE>   27

                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT (the "Agreement") is made and entered into
this 5th day of October, 1998 (the "Date of Grant"), by and between DALLAS
SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and C. V.
Prothro, an officer and director of the Company ("Optionee").

        WHEREAS, the Company's 1993 Officer and Director Stock Option Plan (the
"Plan") provides that certain officers of the Company may from time to time be
granted an option to purchase shares of the Company's Common Stock, par value
S.02 per share (the "Common Stock"), as therein provided, in furtherance of the
purposes of the Plan.

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. GRANT OF OPTION. The Company hereby grants to Optionee, pursuant to
Section 7(a) of the Plan, an option (the "Option") to purchase all or any part
of 270,000 shares of the Common Stock of the Company on the terms and conditions
herein set forth.

        2. PURCHASE PRICE. The purchase price of each share of Common Stock
subject to this Option shall be $23.75 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such c
heck and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

                                       27
<PAGE>   28

        3. TERM OF OPTION. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. EXERCISE OF THE OPTION. This Option shall be exercisable in
installments (subject to the right of accumulation described below) so that this
Option shall be exercisable for 25% of the aggregate number of shares provided
in Paragraph 1 hereof at the end of first year of the term hereof and thereafter
shall be exercisable for 6.25% of such aggregate number of shares during each
calendar quarter during the term hereof (until it shall become fully vested at
the end of sixteen (16) calendar quarters from the Date of Grant); provided,
however, that this Option, or any unexercised portion hereof, shall become
immediately exercisable in full upon the occurrence of a Change of Control. To
the extent an installment is not exercised during the time stated, such
installment shall accumulate and be exercisable, in whole or in part, in any
subsequent period during the term of this Option. No fractional shares may be
issued pursuant to the exercise of this Option. Furthermore, the exercise of
this Option shall be subject to the condition that if at any time the Company
shall determine in its sole discretion that the satisfaction of withholding tax
or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in connection with, such exercise or the
delivery or purchase of shares pursuant thereto, then in any such event, such
exercise shall not be effective unless such withholding, listing, registration,
qualification, report, consent or approval shall have been effected or obtained
free of any conditions not acceptable to the Company.

                                       28
<PAGE>   29

        5. NOTICE OF ELECTION. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 9 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. TAX BENEFIT RIGHT. The Board may in its sole discretion at any time
prior to the exercise of this Option grant to Optionee a bonus in an amount in
cash not to exceed the then existing maximum statutory Federal income tax rate
(including any surtax or similar charge or assessment) for individual taxpayers
multiplied by the amount of income, if any, realized by Optionee for Federal
income tax purposes as a result of the exercise of this Option. Any such
payment, if granted, shall be made by the Company upon the due date for such
taxes in the form of a check payable to the Internal Revenue Service for the
account of Optionee, or in such other manner as the Board in its sole discretion
may determine. Any such payment shall otherwise be made upon such terms and
conditions as may from time to time be determined by the Board and

                                       29
<PAGE>   30

such right shall be subject to limitation (as to term, amount, or otherwise) and
to cancellation at any time by the Board in its sole discretion.

        7. COMPANY LOAN. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Board may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the Board.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Board shall have determined in its sole discretion prior to the exercise
date that such loan should be made, but shall have no such obligation if the
Board shall have thereafter canceled or suspended the operation of the loan
provisions of the Plan, or if the loan and/or other loans to be made at such
time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Board in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Board and the execution by Optionee
of such stock powers or other instruments which the Board may deem necessary or
advisable in connection with such loan and creation of such security interest.

                                       30
<PAGE>   31

        8. TRANSFERABILITY. Other than by will or by laws of descent and
distribution, this Option shall be assignable or transferable by Optionee, only
if and under terms and conditions approved by the Board in its sole discretion.
Neither this Option nor the shares covered hereby shall be pledged or
hypothecated in any way. Neither this Option nor the shares covered hereby shall
be subject to the execution, attachment, or similar process except with the
prior written consent of the Board.

        9. TERMINATION OF EMPLOYMENT OR DIRECTORSHIP.

        (a) In the event that Optionee shall at any time hereafter cease to be
an employee of the Company for any reason other than his death, retirement or
permanent disability, any part of the Option granted hereunder which has not
been exercised by the date of such cessation shall immediately terminate on the
date of such cessation. In the event that Optionee's employment by the Company
shall terminate by reason of his retirement or permanent disability, the Option
may be exercised, to the extent of the shares with respect to which the Option
could have been exercised by Optionee on the date of such termination, prior to
the date of its expiration or three (3) months after the date of such
termination, whichever occurs first. If the Optionee ceases to be an employee of
the Company by reason of his death prior to the termination of his right to
exercise this Option in accordance with the provisions hereof without having
totally exercised the Option, the Option may be exercised, to the extent of the
shares with respect to which the Option could have been exercised by Optionee on
the date of Optionee's death, by the Optionee's Successor, provided the Option
is exercised prior to the date of its expiration or one (1) year from the date
of the Optionee's death, whichever occurs first.

                                       31
<PAGE>   32

        (b) Notwithstanding the provisions of Paragraph 9(a) above, in the event
that Optionee shall at any time hereafter cease to be a director of the Company
(whether or not remaining an employee of the Company) for any reason, including,
but not limited to, his retirement, permanent disability or death, any part of
the Option granted hereunder which has not been exercised by the date of such
cessation shall, on the date of such cessation, become immediately exercisable
and may be exercised by Optionee, or by the Optionee's Successor, provided the
Option is exercised prior to the date of its expiration.

        10. ADJUSTMENTS. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        11. NO OTHER RIGHTS OR OBLIGATIONS. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered
thereby until the date of the issuance of one or more stock certificates to him
for such shares pursuant to the due exercise of the Option. The granting of this
Option shall not confer on Optionee any continued right to employment or tenure
as an officer of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        12. SUBJECT TO PLAN. In the event of any conflict between the terms and
conditions of the Plan and those set forth herein, the terms of this Option
shall govern and be determinative.

                                       32
<PAGE>   33

        13. SHAREHOLDERS AGREEMENT. The shares of Common Stock issued to
Optionee upon the exercise of this Option shall be deemed to be issued pursuant
to a "fully vested stock option" under the terms of any Shareholder's Agreement
previously entered into between the Company and Optionee.

        14. DEFINED TERMS. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Stock Option Agreement as of the date first above written.

Address for Notices:                         DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244                          By:
                                                   -----------------------------
                                                     Alan P. Hale

                                             Title:
                                                   -----------------------------
                                                     Vice President -- Finance

-----------------------------------          -----------------------------------
                                                     C. V. Prothro, Optionee

-----------------------------------

                                       33
<PAGE>   34

Form of Stock Option Agreement used in 1998 and in 1999 (except as to exercise
price) for grants under the 1993 Stock Officer and Director Stock Option Plan to
non-director officers and employees

                                       34
<PAGE>   35

                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT (the "Agreement") is made and entered into
this 5th day of October, 1998 (the "Date of Grant"), by and between DALLAS
SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and Michael
D. Smith ("Optionee").

        WHEREAS, the Company's 1993 Officer and Director Stock Option Plan (the
"Plan") provides that certain officers of the Company may from time to time be
granted an option to purchase shares of the Company's Common Stock, par value
$.02 per share (the "Common Stock"), as therein provided, in furtherance of the
purposes of the Plan.

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. GRANT OF OPTION. The Company hereby grants to Optionee, pursuant to
Section 7(a) of the Plan, the terms and provisions of which Plan are
incorporated herein by reference, an option (the "Option") to purchase all or
any part of 36,000 shares of the Common Stock of the Company on the terms and
conditions herein set forth.

        2. PURCHASE PRICE. The purchase price of each share of Common Stock
subject to this Option shall be $23.75 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such

                                       35
<PAGE>   36

determinations shall be binding upon the Optionee. No shares may be issued until
full payment of the purchase price therefor has been made.

        3. TERM OF OPTION. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. EXERCISE OF THE OPTION. This Option shall be exercisable in
installments (subject to the right of accumulation described below) so that this
Option shall be exercisable for 25% of the aggregate number of shares provided
in Paragraph 1 hereof at the end of first year of the term hereof and thereafter
shall be exercisable for 6.25% of such aggregate number of shares during each
calendar quarter during the term hereof (until it shall become fully vested at
the end of sixteen (16) calendar quarters from the Date of Grant); provided,
however, that this Option, or any unexercised portion hereof, shall become
immediately exercisable in full upon the occurrence of a Change of Control. To
the extent an installment is not exercised during the time stated, such
installment shall accumulate and be exercisable, in whole or in part, in any
subsequent period during the term of this Option. No fractional shares may be
issued pursuant to the exercise of this Option. Furthermore, the exercise of
this Option shall be subject to the condition that if at any time the Company
shall determine in its sole discretion that the satisfaction of withholding tax
or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in connection with, such exercise or the
delivery or purchase of shares pursuant thereto, then in any such event, such
exercise shall not be effective unless such

                                       36
<PAGE>   37

withholding, listing, registration, qualification, report, consent or approval
shall have been effected or obtained free of any conditions not acceptable to
the Company.

        5. NOTICE OF ELECTION. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 10 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. TAX BENEFIT RIGHT. The Board may in its sole discretion at any time
prior to the exercise of this Option grant to Optionee a bonus in an amount in
cash not to exceed the then existing maximum statutory Federal income tax rate
(including any surtax or similar charge or assessment) for individual taxpayers
multiplied by the amount of income, if any, realized by Optionee for Federal
income tax purposes as a result of the exercise of this Option. Any such
payment, if granted, shall be made by the Company upon the due date for such
taxes in the form of a check payable to the Internal Revenue Service for the
account of Optionee, or in such other

                                       37
<PAGE>   38

manner as the Board in its sole discretion may determine. Any such payment shall
otherwise be made upon such terms and conditions as may from time to time be
determined by the Board and such right shall be subject to limitation (as to
term, amount, or otherwise) and to cancellation at any time by the Board in its
sole discretion.

        7. COMPANY LOAN. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Board may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the Board.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Board shall have determined in its sole discretion prior to the exercise
date that such loan should be made, but shall have no such obligation if the
Board shall have thereafter canceled or suspended the operation of the loan
provisions of the Plan, or if the loan and/or other loans to be made at such
time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Board in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Board and the execution by Optionee
of such stock powers or other instruments which the Board may deem necessary or
advisable in connection with such loan and creation of such security interest.

                                       38
<PAGE>   39

        8. NON-TRANSFERABILILTY. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee, voluntarily or by operation of law, other than by will
or by laws of descent and distribution. Neither this Option nor the shares
covered hereby shall be pledged or hypothecated in any way. Neither this Option
nor the shares covered hereby shall be subject to the execution, attachment, or
similar process except with the prior written consent of the Board.

        9. TERMINATION OF EMPLOYMENT. In the event that Optionee shall at any
time hereafter cease to be an employee of the Company for any reason other than
his death or retirement, any part of the Option granted hereunder which has not
been exercised by the date of such cessation shall immediately terminate on the
date of such cessation. In the event that Optionee's employment by the Company
shall terminate by reason of his retirement or permanent disability, the Option
may be exercised, to the extent of the shares with respect to which the Option
could have been exercised by optionee on the date of such termination prior to
the date of its expiration or three (3) months after the date of such
termination, whichever occurs first.

        10. DEATH OF OPTIONEE. If the Optionee dies prior to the termination of
his right to exercise this Option in accordance with the provisions hereof
without having totally exercised the Option, the Option may be exercised, to the
extent of the shares with respect to which the Option could have been exercised
by Optionee on the date of Optionee's death, by the Optionee's Successor,
provided the Option is exercised prior to the date of its expiration or one (1)
year from the date of the Optionee's death, whichever occurs first.

        11. ADJUSTMENTS. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its

                                       39
<PAGE>   40

discretion, any stock dividend, stock split, share combination, exchange of
shares, recapitalization, merger, consolidation, separation, reorganization,
liquidation or the like of or by the Company. Decisions by the Board as to what
adjustments shall be made, and the extent thereof, shall be final, binding and
conclusive on Optionee.

        12. NO OTHER RIGHTS OR OBLIGATIONS. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered
thereby until the date of the issuance of one or more stock certificates to him
for such shares pursuant to the due exercise of the Option. The granting of this
Option shall not confer oil Optionee any continued right to employment or tenure
as an officer of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        13. SUBJECT TO PLAN. This Option is subject to all of the terms and
conditions of the Company's 1993 Officer & Director Stock Option Plan (and as
amended if the Plan is amended hereafter). In the event of any conflict between
such terms and conditions and those set forth herein, the terms of the Plan
shall govern and be determinative.

        14. SHAREHOLDERS AGREEMENT. The shares of Common Stock issued to
Optionee upon the exercise of this Option shall be deemed to be issued pursuant
to a "fully vested stock option" under the terms of any Shareholder's Agreement
previously entered into between the Company and Optionee.

        15. DEFINED TERMS. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

                                       40
<PAGE>   41

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Stock Option Agreement as of the date first above written.

Address for Notices:                         DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244                          By:
                                                   -----------------------------
                                                     C. V. Prothro

                                             Title:
                                                   -----------------------------
                                                     Chairman of the Board,
                                                     President and Chief
                                                     Executive Officer

-----------------------------------          -----------------------------------
                                             Michael D. Smith, Optionee

-----------------------------------

                                       41
<PAGE>   42

Form of Stock Option Agreement used in 1998 in connection with "repricing" of
options under the 1987 Stock Option Plan to non-director employees

                                       42
<PAGE>   43

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and
entered into this 5th day of October, 1998 (the "Date of Grant"), by and between
DALLAS SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and
____________________________, an employee of the Company ("Optionee").

        WHEREAS, the Company desires, by affording Optionee an opportunity to
purchase shares of its Common Stock, par value $.02 per share (the "Common
Stock"), as hereinafter provided, to carry out the purposes of the Dallas
Semiconductor Corporation 1987 Stock Option Plan (the "Plan");

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. The Company hereby grants to Optionee, pursuant to
the Plan, the terms and provisions of which are incorporated herein by
reference, of an option (the "Option") to purchase all or any part of _______
shares of the Common Stock of the Company on the terms and conditions herein set
forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $23.75 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall not be less than 100% of
the fair market value of such shares as determined by the Board of Directors of
the Company (the

                                       43
<PAGE>   44

"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period equal to
the unexpired term of the Prior Option (as defined in Paragraph 15 hereof) but
in no event greater than ten (10) years from the Date of Grant, subject to
earlier termination or cancellation as provided herein and in the Plan.

        4. Exercise of the Option. Subject to the provisions of Paragraph 14 of
this Agreement and the Shareholder's Agreement referenced therein, this Option
shall be exercisable, after the expiration of one (1) year from the Date of
Grant, in installments (subject to the right of accumulation described below) so
that this Option shall be exercisable for 5.0% of the aggregate number of shares
provided in Paragraph I hereof during each calendar quarter during the term
hereof commencing on the last day of the first completed calendar quarter
following the Date of Grant until the end of twenty (20) calendar quarters.
[NOTE: CHANGE TO 6.25% AND 16 CALENDAR QUARTERS FOR GRANTS THAT VEST IN FOUR
YEARS.] To the extent an installment is not exercised during the time stated,
such installment shall accumulate and be exercisable, in whole or in part, in
any subsequent period during the term of this Option. No fractional shares may
be issued pursuant to the exercise of this Option. Furthermore, the exercise of
this Option shall be subject to the condition that if at any time the Company
shall determine, in its sole discretion, that the satisfaction of withholding
tax or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in

                                       44
<PAGE>   45

connection with, such exercise or the delivery or purchase of shares pursuant
hereto, then in any such event, such exercise shall not be effective unless such
withholding, listing, registration, qualification, report, consent or approval
shall have been effected or obtained free of any conditions not acceptable to
the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company, in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event, the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 8 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. Non-Transferability. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee, voluntarily or by operation of law, other than by will
or by laws of descent and distribution. Neither this Option nor the shares
covered hereby shall be pledged or hypothecated in any way. Neither this Option
nor the shares covered hereby shall be subject to execution, attachment, or
similar process except with the prior written consent of the Board.

                                       45
<PAGE>   46

        7. Termination of Employment. In the event that Optionee shall at any
time hereafter cease to be an employee of the Company for any reason other than
his death, retirement or permanent disability, any part of the Option granted
hereunder which has not been exercised by the date of such cessation shall
immediately terminate on the date of such cessation. In the event that
Optionee's employment with the Company shall terminate by reason of his
retirement or permanent disability, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of such termination prior to the date of its expiration or
three (3) months after the date of such termination, whichever occurs first.

        8. Death of Optionee. If Optionee dies prior to the termination of his
right to exercise this Option in accordance with the provisions hereof without
having totally exercised the Option, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of Optionee's death, by the Optionee's estate or by the
person who acquires the right to exercise the Option by bequest, inheritance, or
by reason of the death of the Optionee, provided the Option is exercised prior
to the date of its expiration or one (1) year from the date of the Optionee's
death, whichever occurs first.

        19. Adjustment. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

                                       46
<PAGE>   47

        10. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
shall not confer on Optionee any continued right of employment with or service
to the Company or any additional rights other than as expressly provided for
herein. There is no obligation upon Optionee to exercise this Option or any part
thereof.

        11. Subject to Plan. This Option is subject to all of the terms and
conditions of the Company's 1987 Stock Option Plan, as amended (and as amended
hereafter if the Plan is amended hereafter). In the event of any conflict
between such terms and conditions and those set forth herein, the terms of the
Plan shall govern and be determinative. Unless otherwise defined herein, each
capitalized term used herein shall have the same meaning given such term in the
Plan.

        12. Incentive Stock Option. This Option is not intended to qualify as an
"incentive stock option" under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        13. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof. Any such action by the Board shall be final and
binding on Optionee. Neither this Option nor any term or provision hereof may be
amended, supplemented, waived or modified orally, but only by an instrument in
writing signed by a duly authorized officer of the Company.

        14. Shareholder's Agreement. The exercise of this Option is expressly
conditioned upon the prior or contemporaneous execution by the Optionee and the
Company of a Shareholder's Agreement as provided in the Plan. All rights of the
Optionee and his heirs, successors and assigns, shall be determined by such
agreement and the Optionee and his heirs,

                                       47
<PAGE>   48

successors and assigns shall be bound thereby. The shares of Common Stock issued
pursuant to the exercise hereof shall not be deemed to be issued pursuant to a
"fully vested stock option" and shall be subject to the repurchase rights as
provided in such agreement.

        15. Cancellation of Prior Option. The grant of this Option is expressly
conditioned upon, and Optionee by his signature hereto, acknowledges, the
cancellation of that certain option (the "Prior Option") granted to Optionee on
_____________, 199__, covering ________ shares of Common Stock of the Company
with an exercise price of $________ per share. Optionee agrees to deliver to the
Company the original document evidencing the Prior Option, but the cancellation
of the Prior Option shall be effective regardless of whether or not such
delivery is made by Optionee.

        IN WITNESS WBEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

Address for Notices:                         DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway                  By:
Dallas, Texas 75244                                -----------------------------

                                             Title:
                                                   -----------------------------

-----------------------------------          -----------------------------------
                                             Optionee

-----------------------------------

                                       48
<PAGE>   49

Form of Stock Option Agreement used in 1998 in connection with "repricing" of
options under the 1987 Stock Option Plan to non-employee directors

                                       49
<PAGE>   50

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and
entered into this 5th day of October, 1998 (the "Date of Grant") (October 4
being a non-business day), by and between DALLAS SEMICONDUCTOR CORPORATION, a
Delaware corporation (the "Company"), and Richard L. King, a director of the
Company ("Optionee").

        WHEREAS, the Company's 1987 Stock Option Plan, as amended (the "Plan")
provides for the automatic annual grant of options to purchase shares of the
Company's Common Stock, par value $.02 per share (the "Common Stock") to certain
of the Company's non-employee directors, as hereinafter provided, in furtherance
of the purposes of the Plan;

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. Subject to the provisions of Paragraph 16 hereof,
the Company hereby confirms the automatic grant to Optionee, pursuant to Section
7(b) of the Plan, of an option (the "Option") to purchase all or any part of
10,000 shares of the Common Stock of the Company on the terms and conditions
herein set forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $23.75 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such

                                       50
<PAGE>   51

determinations shall be binding upon the Optionee. No shares may be issued until
full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period equal to
the unexpired term of the Prior Option (as defined in Paragraph 16 hereof but in
no event greater than ten (10) years from the Date of Grant, subject to earlier
termination or cancellation as provided herein.

        4. Exercise of the Option. This Option shall be exercisable, after the
expiration of one (1) year from the Date of Grant, in installments (subject to
the right of accumulation described below) so that this Option shall be
exercisable for 6.25% of the aggregate number of shares provided in Paragraph 1
hereof during each calendar quarter during the term hereof, commencing on the
last day of the first completed calendar quarter following the Date of Grant
(until it shall become fully vested at the end of sixteen (16) calendar
quarters). To the extent an installment is not exercised during the time stated,
such installment shall accumulate and be exercisable, in whole or in part, in
any subsequent period during the term of this Option. No fractional shares may
be issued pursuant to the exercise of this Option. Furthermore, the exercise of
this Option shall be subject to the condition that if at any time the Company
shall determine, in its sole discretion, that the satisfaction of withholding
tax or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in connection with, such exercise or the
delivery or purchase of shares pursuant hereto, then in any such event, such
exercise shall not be effective unless such withholding, listing, registration,

                                       51
<PAGE>   52

qualification, report, consent or approval shall have been effected or obtained
free of any conditions not acceptable to the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company, in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event, the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 9 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. Tax Benefit Right. The Compensation Committee (the "Committee") of
the Board may, in its sole discretion, at any time prior to the exercise of this
Option, grant to Optionee a bonus in an amount in cash not to exceed the then
existing maximum statutory Federal income tax rate (including any surtax or
similar charge or assessment) for individual taxpayers multiplied by the amount
of ordinary income, if any, realized by Optionee for Federal income tax purposes
as a result of the exercise of this Option. Any such payment, if granted, shall
be made by the Company upon the due date for such taxes in the form of a check
payable to the Internal Revenue Service for the account of Optionee, or in such
other manner as the Committee in its sole discretion may

                                       52
<PAGE>   53

determine. Any such payment shall otherwise be made upon such terms and
conditions as may from time to time be determined by the Committee and such
right shall be subject to limitation (as to term, amount, or otherwise) and to
cancellation at any time by the Committee, in its sole discretion.

        7. Company Loan. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Company may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the
Committee.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Committee shall have determined, in its sole discretion prior to the
exercise date, that such loan should be made, but shall have no such obligation
if the Committee shall have thereafter canceled or suspended the operation of
the loan provisions of the Plan, or if the loan and/or other loans to be made at
such time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Committee in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Committee and the execution by
Optionee of such stock powers or other instruments which the Committee may deem
necessary or advisable in connection with such loan and creation of such
security interest.

                                       53
<PAGE>   54

        8. Transferability. Other than by will or by laws of descent and
distribution, this Option shall be assignable or transferable by Optionee, only
if and under terms and conditions approved by the Board in its sole discretion.
Neither this Option nor the shares covered hereby shall be pledged or
hypothecated in any way. Neither this Option nor the shares covered hereby shall
be subject to execution, attachment, or similar process except with the prior
written consent of the Board.

        9. Termination of Directorship. In the event that Optionee shall at any
time hereafter cease to be a director of the Company for any reason, including,
but not limited to, his retirement, permanent disability or death, any part of
the Option granted hereunder which has not been exercised by the date of such
cessation shall, on the date of such cessation, become immediately exercisable
and may be exercised by Optionee, or by the Optionee's estate or by the person
who acquires the right to exercise the Option by bequest, inheritance, or by
reason of the death of the Optionee, provided the Option is exercised prior to
the date of its expiration.

        10. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        11. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
shall not confer on Optionee any continued right of service or tenure

                                       54
<PAGE>   55

as a director of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        12. Option to Control. In the event of any conflict between the terms
and conditions of the Plan and those set forth herein, the terms of this Option
shall govern and be determinative.

        13. Incentive Stock Option. This Option is not intended to qualify as an
"incentive stock option" under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        14. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof Any such action by the Board shall be final and
binding on Optionee.

        15. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        16. Cancellation of Prior Option. The grant of this Option is expressly
conditioned upon, and Optionee by his signature hereto, acknowledges, the
cancellation of that certain option (the "Prior Option") granted to Optionee on
October 3, 1997, covering 10,000 shares of Common Stock of the Company with an
exercise price of $47.625 per share. Optionee agrees to deliver to the Company
the original document evidencing the Prior Option, but the cancellation of the
Prior Option shall be effective regardless of whether or not such delivery is
made by Optionee.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

                                       55
<PAGE>   56

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244                     By:
                                           -------------------------------------
                                             C. V. Prothro
                                             Chairman of the Board, President
                                             and Chief Executive Officer

809 Jeffrey Court                       ----------------------------------------
P. O. Box 4251                          Richard L. King, Optionee
Incline Village, Nevada  89450

                                       56
<PAGE>   57

Form of Stock Option Agreement in use prior to 1998 for automatic grants under
the 1987 Stock Option Plan to non-employee directors

                                       57
<PAGE>   58

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and
entered into this 4th day of October, 1996 (the "Date of Grant"), by and between
DALLAS SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and
________________________ a director of the Company ("Optionee").

        WHEREAS, the Company's 1987 Stock Option Plan, as amended (the "Plan")
provides for the automatic annual grant of options to purchase shares of the
Company's Common Stock, par value $.02 per share (the "Common Stock") to certain
of the Company's non-employee directors, as hereinafter provided, in furtherance
of the purposes of the Plan;

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. The Company hereby confirms the automatic grant to
Optionee, pursuant to Section 7(b) of the Plan, the terms and provisions of
which Plan are incorporated herein by reference, of an option (the "Option") to
purchase all or any part of _________ shares of the Common Stock of the company
on the terms and conditions herein set forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $_________ per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. the value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the

                                       58
<PAGE>   59

"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. Exercise of the Option. This Option shall be exercisable in
installments (subject to the right of accumulation described below) so that this
Option shall be exercisable for 6.25% of the aggregate number of shares provided
in Paragraph 1 hereof during each calendar quarter during the term hereof,
commencing on the last day of the first completed calendar quarter following the
Date of Grant (until it shall become fully vested at the end of sixteen (16)
calendar quarters). To the extent an installment is not exercised during the
time stated, such installment shall accumulate and be exercisable, in whole or
in part, in any subsequent period during the term of this Option. No fractional
shares may be issued pursuant to the exercise of this Option. Furthermore, the
exercise of this Option shall be subject to the condition that if at any time
the Company shall determine, in its sole discretion, that the satisfaction of
withholding tax or other withholding liabilities, or that the listing,
registration, or qualification of any share otherwise deliverable upon such
exercise upon any national securities exchange or under any state or federal
law, or that the report to, or consent or approval of, any regulatory body, is
necessary or desirable as a condition of, or in connection with, such exercise
or the delivery or purchase of shares pursuant hereto, then in any such event,
such exercise shall not be effective unless such withholding, listing,
registration, qualification, report, consent or approval shall have been
effected or obtained free of any conditions not acceptable to the Company.

                                       59
<PAGE>   60

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company, in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event, the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 10 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. Tax Benefit Right. The Compensation Committee (the "Committee") of
the Board may, in its sole discretion, at any time prior to the exercise of this
Option, grant to Optionee a bonus in an amount in cash not to exceed the then
existing maximum statutory Federal income tax rate (including any surtax or
similar charge or assessment) for individual taxpayers multiplied by the amount
of ordinary income, if any, realized by Optionee for Federal income tax purposes
as a result of the exercise of this Option. Any such payment, if granted, shall
be made by the Company upon the due date for such taxes in the form of a check
payable to the Internal Revenue Service for the account of Optionee, or in such
other manner as the Committee in its sole discretion may determine. Any such
payment shall otherwise be made upon such terms and conditions as may from time
to time be determined by the Committee and such right shall be subject to
limitation (as

                                       60
<PAGE>   61

to term, amount, or otherwise) and to cancellation at any time by the Committee,
in its sole discretion.

        7. Company Loan. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Company may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the
Committee.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Committee shall have determined, in its sole discretion prior to the
exercise date, that such loan should be made, but shall have no such obligation
if the Committee shall have thereafter canceled or suspended the operation of
the loan provisions of the Plan, or if the loan and/or other loans to be made at
such time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Committee in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Committee and the execution by
Optionee of such stock powers or other instruments which the Committee may deem
necessary or advisable in connection with such loan and creation of such
security interest.

        8. Non-Transferability. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee,

                                       61
<PAGE>   62

voluntarily or by operation of law, other than by will or by laws of descent and
distribution. Neither this Option nor the shares covered hereby shall be pledged
or hypothecated in any way. Neither this Option nor the shares covered hereby
shall be subject to execution, attachment, or similar process except with the
prior written consent of the Board.

        9. Termination of Directorship. In the event that Optionee shall at any
time hereafter cease to be a director of the Company for any reason other than
his death or retirement, any part of the Option granted hereunder which has not
been exercised by the date of such cessation shall immediately terminate on the
date of such cessation. In the event that Optionee's services as a director of
the Company shall terminate by reason of his retirement, the Option may be
exercised, to the extent of the shares with respect to which the Option could
have been exercised by Optionee on the date of such termination prior to the
date of its expiration or three (3) months after the date of such termination,
whichever occurs first.

        10. Death of Optionee. If Optionee dies prior to the termination of his
right to exercise this Option in accordance with the provisions hereof without
having totally exercised the Option, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of Optionee's death, by the Optionee's estate or by the
person who acquires the right to exercise the Option by bequest, inheritance, or
by reason of the death of the Optionee, provided the Option is exercised prior
to the date of its expiration or one (1) year from the date of the Optionee's
death, whichever occurs first.

        11. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions

                                       62
<PAGE>   63

by the Board as to what adjustments shall be made, and the extent thereof, shall
be final, binding and conclusive on Optionee.

        12. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
shall not confer on Optionee any continued fight of service or tenure as a
director of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        13. Subject to Plan. This Option is subject to all of the terms and
conditions of the Company's 1987 Stock Option Plan, as amended (and as amended
hereafter if the Plan is amended hereafter). In the event of any conflict
between such terms and conditions and those set forth herein, the terms of the
Plan shall govern and be determinative.

        14. Incentive Stock Option. This Option is not intended to qualify as an
"incentive stock option" under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        15. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof Any such action by the Board shall be final and
binding on Optionee.

        16. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

                                       63
<PAGE>   64

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway             By:
Dallas, Texas 75244                        -------------------------------------
                                             C. V. Prothro
                                             Chairman of the Board, President
                                             and Chief Executive Officer

                                        ----------------------------------------
                                        Optionee

                                       64
<PAGE>   65

Form of Stock Option Agreement used in 1998 for automatic grants under the 1987
Stock Option Plan to non-employee directors

                                       65
<PAGE>   66

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and
entered into this 5th day of October, 1998 (the "Date of Grant") (October 4
being a non-business day), by and between DALLAS SEMICONDUCTOR CORPORATION, a
Delaware corporation (the "Company"), and ___________, a director of the Company
("Optionee").

        WHEREAS, the Company's 1987 Stock Option Plan, as amended (the "Plan")
provides for the automatic annual grant of options to purchase shares of the
Company's Common Stock, par value $.02 per share (the "Common Stock") to certain
of the Company's non-employee directors, as hereinafter provided, in furtherance
of the purposes of the Plan;

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. The Company hereby confirms the automatic grant to
Optionee, pursuant to Section 7(b) of the Plan, of an option (the "Option') to
purchase all or any part of 10,000 shares of the Common Stock of the Company on
the terms and conditions herein set forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be per share. Full payment for shares purchased
upon exercise of this Option shall be made in cash or by check, or by delivery
of previously owned shares of Common Stock, or partly in cash or such check and
partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

                                       66
<PAGE>   67

        3. Term of Option. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein.

        4. Exercise of the Option. This Option shall be exercisable in
installments (subject to the right of accumulation described below) so that this
Option shall be exercisable for 6.25% of the aggregate number of shares provided
in Paragraph 1 hereof during each calendar quarter during the term hereof,
commencing on the last day of the first completed calendar quarter following the
Date of Grant (until it shall become fully vested at the end of sixteen (16)
calendar quarters). To the extent an installment is not exercised during the
time stated, such installment shall accumulate and be exercisable, in whole or
in part, in any subsequent period during the term of this Option. No fractional
shares may be issued pursuant to the exercise of this Option. Furthermore, the
exercise of this Option shall be subject to the condition that if at any time
the Company shall determine, in its sole discretion, that the satisfaction of
withholding tax or other withholding liabilities, or that the listing,
registration, or qualification of any share otherwise deliverable upon such
exercise upon any national securities exchange or under any state or federal
law, or that the report to, or consent or approval of, any regulatory body, is
necessary or desirable as a condition of, or in connection with, such exercise
or the delivery or purchase of shares pursuant hereto, then in any such event,
such exercise shall not be effective unless such withholding, listing,
registration, qualification, report, consent or approval shall have been
effected or obtained free of any conditions not acceptable to the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company, in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and

                                       67
<PAGE>   68

shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event, the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 9 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. Tax Benefit Right. The Compensation Committee (the "Committee") of
the Board may, in its sole discretion, at any time prior to the exercise of this
Option, grant to Optionee a bonus in an amount in cash not to exceed the then
existing maximum statutory Federal income tax rate (including any surtax or
similar charge or assessment) for individual taxpayers multiplied by the amount
of ordinary income, if any, realized by Optionee for Federal income tax purposes
as a result of the exercise of this Option. Any such payment, if granted, shall
be made by the Company upon the due date for such taxes in the form of a check
payable to the Internal Revenue Service for the account of Optionee, or in such
other manner as the Committee in its sole discretion may determine. Any such
payment shall otherwise be made upon such terms and conditions as may from time
to time be determined by the Committee and such right shall be subject to
limitation (as to term, amount, or otherwise) and to cancellation at any time by
the Committee, in its sole discretion.

        7. Company Loan. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the

                                       68
<PAGE>   69

Company may (on such exercise date) loan to Optionee an amount equal to the
excess of the aggregate option price of the Common Stock which Optionee is then
electing to purchase pursuant to the exercise of this Option, or any part
hereof, over the aggregate par value of such Common Stock, less any other
consideration delivered by Optionee upon such exercise, provided that Optionee
shall execute a promissory note for such amount, payable to the order of the
Company, in such form as is in accordance with the provisions of the Plan and as
is otherwise satisfactory to the Committee.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Committee shall have determined, in its sole discretion prior to the
exercise date, that such loan should be made, but shall have no such obligation
if the Committee shall have thereafter canceled or suspended the operation of
the loan provisions of the Plan, or if the loan and/or other loans to be made at
such time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Committee in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Committee and the execution by
Optionee of such stock powers or other instruments which the Committee may deem
necessary or advisable in connection with such loan and creation of such
security interest.

        8. Transferability. Other than by will or by laws of descent and
distribution, this Option shall be assignable or transferable by Optionee, only
if and under terms and conditions approved by the Board in its sole discretion.
Neither this Option nor the shares covered hereby shall be pledged or
hypothecated in any way. Neither this Option nor the shares covered hereby shall
be subject to execution, attachment, or similar process except with the prior
written consent of the Board.

                                       69
<PAGE>   70

        9. Termination of Directorship. In the event that Optionee shall at any
time hereafter cease to be a director of the Company for any reason, including,
but not limited to, his retirement, permanent disability or death, any part of
the Option granted hereunder which has not been exercised by the date of such
cessation shall, on the date of such cessation, become immediately exercisable
and may be exercised by Optionee, or by the Optionee's estate or by the person
who acquires the right to exercise the Option by bequest, inheritance, or by
reason of the death of the Optionee, provided the Option is exercised prior to
the date of its expiration.

        10. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        11. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
shall not confer on Optionee any continued right of service or tenure as a
director of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        12. Option to Control. In the event of any conflict between the terms
and conditions of the Plan and those set forth herein, the terms of this Option
shall govern and be determinative.

                                       70
<PAGE>   71

        13. Incentive Stock Option. This Option is not intended to qualify as an
"incentive stock option" under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        14. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof. Any such action by the Board shall be final and
binding on Optionee.

        15. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway             By:
Dallas, Texas 75244                        -------------------------------------
                                             C. V. Prothro
                                             Chairman of the Board, President
                                             and Chief Executive Officer

                                        ----------------------------------------
                                        Optionee

                                       71
<PAGE>   72

Form of Stock Option Agreement under the 1993 Officer and Directors Stock Option
Plan used for July 1999 grants to non-employee directors and the Corporate
Secretary

                                       72
<PAGE>   73

                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT (the "Agreement") is made and entered into
this 21st day of July, 1999 (the "Date of Grant"), by and between DALLAS
SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and M. D.
Sampels, a director of the Company ("Optionee").

        WHEREAS, the Company's 1993 Officer and Director Stock Option Plan (the
"Plan") provides that certain officers and directors of the Company may from
time to time be granted an option to purchase shares of the Company's Common
Stock, par value $.02 per share (the "Common Stock"), as therein provided, in
furtherance of the purposes of the Plan.

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. GRANT OF OPTION. The Company hereby grants to Optionee, pursuant to
Section 5 of the Plan, an option (the "Option") to purchase all or any part of
30,000 shares of the Common Stock of the Company on the terms and conditions
herein set forth.

        2. PURCHASE PRICE. The purchase price of each share of Common Stock
subject to this Option shall be $50.5625 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such

                                       73
<PAGE>   74

determinations shall be binding upon the Optionee. No shares may be issued until
full payment of the purchase price therefor has been made.

        3. TERM OF OPTION. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. EXERCISE OF THE OPTION. This Option shall be exercisable in
installments (subject to the right of accumulation described below) so that this
Option shall be exercisable for 25% of the aggregate number of shares provided
in Paragraph I hereof at the end of first year of the term hereof and thereafter
shall be exercisable for 6.25% of such aggregate number of shares during each
calendar quarter during the term hereof (until it shall become fully vested at
the end of sixteen (16) calendar quarters from the Date of Grant); provided,
however, that this Option, or any unexercised portion hereof, shall become
immediately exercisable in full upon the occurrence of a Change of Control. To
the extent an installment is not exercised during the time stated, such
installment shall accumulate and be exercisable, in whole or in part, in any
subsequent period during the term of this Option. No fractional shares may be
issued pursuant to the exercise of this Option. Furthermore, the exercise of
this Option shall be subject to the condition that if at any time the Company
shall determine in its sole discretion that the satisfaction of withholding tax
or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in connection with, such exercise or the
delivery or purchase of shares pursuant thereto, then in any such event, such
exercise shall not be effective unless such

                                       74
<PAGE>   75

withholding, listing, registration, qualification, report, consent or approval
shall have been effected or obtained free of any conditions not acceptable to
the Company.

        5. NOTICE OF ELECTION. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 10 hereto by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the fight of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. TAX BENEFIT RIGHT. Optionee is hereby granted a bonus in an amount in
cash not to exceed the then existing maximum statutory Federal income tax rate
(including any surtax or similar charge or assessment) for individual taxpayers
multiplied by the amount of income, if any, realized by Optionee for Federal
income tax purposes as a result of the exercise of this Option. Such payment(s)
shall be made by the Company on the exercise date(s) in the form of a check
payable to the Internal Revenue Service for the account of Optionee.(3)

--------

(3) This provision is not contained in the Corporate Secretary's Option
    Agreement.

                                       75
<PAGE>   76

        7. COMPANY LOAN.

        (a) Subject to the provisions of subparagraph (b) below, upon request of
Optionee made at least three (3) business days prior to the intended exercise
date, the Board may (on such exercise date) loan to Optionee an amount equal to
the excess of the aggregate option price of the Common Stock which Optionee is
then electing to purchase pursuant to the exercise of this Option, or any part
hereof, over the aggregate par value of such Common Stock, less any other
consideration delivered by Optionee upon such exercise, provided that Optionee
shall execute a promissory note for such amount, payable to the order of the
Company, in such form as is in accordance with the provisions of the Plan and as
is otherwise satisfactory to the Board.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Board shall have determined in its sole discretion prior to the exercise
date that such loan should be made, but shall have no such obligation if the
Board shall have thereafter canceled or suspended the operation of the loan
provisions of the Plan, or if the loan and/or other loans to be made at such
time would exceed any limit on the maximum amount of loans that may be made
under the Plan established from time to time by the Board in its discretion.

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Board and the execution by Optionee
of such stock powers or other instruments which the Board may deem necessary or
advisable in connection with such loan and creation of such security interest.

        8. NON-TRANSFERABILITY. Other than by will or by laws of descent and
distribution, this Option shall be assignable or transferable by Optionee only
if and under terms and conditions approved by the Board in its sole discretion.
Neither this Option nor the shares covered hereby

                                       76
<PAGE>   77

shall be pledged or hypothecated in any way. Neither this Option nor the shares
covered hereby shall be subject to the execution, attachment, or similar process
except with the prior written consent of the Board.

        9. TERMINATION OF DIRECTORSHIP. In the event that Optionee shall at any
time hereafter cease to be a director of the Company for any reason, including,
but not limited to, his retirement, permanent disability or death, any part of
the Option granted hereunder which has not been exercised by the date of such
cessation shall, on the date of such cessation, become immediately exercisable
and may be exercised by Optionee, or by the Optionee's Successor, provided the
Option is exercised prior to the date of its expiration.

        10. ADJUSTMENTS. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        11. NO OTHER RIGHTS OR OBLIGATIONS. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered
thereby until the date of the issuance of one or more stock certificates to him
for such shares pursuant to the due exercise of the Option. The granting of this
Option shall not confer on Optionee any continued right to tenure as a director
of the Company or any additional rights other than as expressly provided for
herein.' There is no obligation upon Optionee to exercise this Option or any
part thereof

                                       77
<PAGE>   78

        12. DEFINED TERMS. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Stock Option Agreement as of the date first above written.

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244   By:               By:
                                              ----------------------------------
                                               C. V. Prothro

                                        Title: /s/ C. V. Prothro
                                              ----------------------------------
                                               Chairman of the Board, President
                                               and Chief Executive Officer

                                               /s/ M. D. Sampels
-----------------------------------           ----------------------------------
                                               M. D. Sampels, Optionee

-----------------------------------

                                       78
<PAGE>   79

FORM OF STOCK OPTION AGREEMENT PURSUANT TO 1987 STOCK OPTION PLAN
FOR USE WITH 12-15-00 GRANTS

                      NON-QUALIFIED STOCK OPTION AGREEMENT

        THIS NON-QUALIFIED STOCK OPTION AGREEMENT (the -'Agreement") is made and
entered into this 15th day of December, 2000 (the "Date of Grant"), by and
between DALLAS SEM[ICONDUCTOR CORPORATION, a Delaware corporation (the
"Company"), and . an employee of the Company ("Optionee").

        WHEREAS, the Company desires, by affording Optionee an opportunity to
purchase shares of its Common Stock, par value $.02 per share (the "Common
Stock"), as hereinafter provided, to carry out the purposes of the Dallas
Semiconductor Corporation 1987 Stock Option Plan, as amended (the "Plan");

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1 . Grant of Option. The Company hereby grants to Optionee option (the
"Option") to purchase all or any part of shares of the Common Stock of the
Company on the terms and conditions herein set forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $24.6875 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such

                                       79
<PAGE>   80

determinations shall be binding upon the Optionee. No shares may be issued until
full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein.

        4. Exercise of the Option. This Option shall be exercisable in full or
in part at any time, and from time to time, during the term hereof, in
accordance with the vesting schedule contained in the "Notice of Grant of Stock
Options and Option Agreement" attached hereto and made a part hereof. No
fractional shares may be issued pursuant to the exercise of this Option.
Furthermore, the exercise of this Option shall be subject to the condition that
if at any time the Company shall determine, in its sole discretion, that the
satisfaction of withholding tax or other withholding liabilities, or that the
listing, registration, or qualification of any share otherwise deliverable upon
such exercise upon any national securities exchange or under any state or
federal law, or that the report to, or consent or approval of, the Company's
stockholders or any regulatory body, is necessary or desirable as a condition
of, or in connection with, such exercise or the delivery or purchase of shares
pursuant hereto, then in any such event, such exercise shall not be effective
unless such withholding, listing, registration, qualification, report, consent
or approval shall have been effected or obtained free of any conditions not
acceptable to the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company, in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for

                                       80
<PAGE>   81

hereinbefore, in which event, the Company shall deliver a certificate or
certificates, as may be requested by Optionee, representing such shares as soon
as practicable after the notice and payment shall be received. The certificate
or certificates for the shares as to which the Option shall have been exercised
shall be registered as designated in the notice. In the event the Option shall
be exercised, pursuant to Paragraph 8 hereof, by any person or persons other
than the Optionee, such notice shall be accompanied by proof deemed appropriate
by the Company of the right of such person or persons to exercise the Option.
All shares that shall be purchased upon the exercise of this Option as provided
herein shall be fully paid and non-assessable.

        6. Non-Transferability. Except as may otherwise be approved by the
Board, during the lifetime of Optionee, this Option shall be exercisable only by
Optionee. This Option shall not be assignable or transferable by Optionee,
voluntarily or by operation of law, other than by will or by laws of descent and
distribution. Neither this Option nor the shares covered hereby shall be pledged
or hypothecated in any way. Neither this Option nor the shares covered hereby
shall be subject to execution, attachment, or similar process except with the
prior written consent of the Board.

        7. Termination of Employment. In the event that Optionee shall at any
time hereafter cease to be an employee of the Company for any reason other than
his death, retirement or permanent disability, any part of the Option granted
hereunder which has not been exercised by the date of such cessation shall
immediately terminate on the date of such cessation. In the event that
Optionee's employment with of the Company shall terminate by reason of his
retirement or permanent disability, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of such termination prior to

                                       81
<PAGE>   82

the date of its expiration or three (3) months after the date of such
termination, whichever occurs first.

        8. Death of Optionee. If Optionee dies prior to the termination of his
right to exercise this Option in accordance with the provisions hereof without
having totally exercised the Option, the Option may be exercised, to the extent
of the shares with respect to which the Option could have been exercised by
Optionee on the date of Optionee's death, by the Optionee's estate or by the
person who acquires the right to exercise the Option by bequest, inheritance, or
by reason of the death of the Optionee, provided the Option is exercised prior
to the date of its expiration or one (1) year from the date of the Optionee's
death, whichever occurs first.

        9. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        10. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to Optionee for
such shares pursuant to the due exercise of the Option. The granting of this
Option shall not confer on Optionee any continued right of employment or
directorship with the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

                                       82
<PAGE>   83

        11. Option to Control. In the event of any conflict between the terms
and conditions of the Plan (as amended and as further amended if the Plan is
amended hereafter) and those set forth herein, the terms of this Agreement shall
govern and be determinative, it being distinctly understood and agreed that
Optionee has no rights with respect to the Option granted hereby other than as
specifically set forth in this Agreement and in the Stockholder's Agreement
provided for in Paragraph 14 below.

        12. Incentive Stock Option. This Option is not intended to qualify as an
"incentive Stock option7 under the Internal Revenue Code of 1986, as amended,
and applicable regulations and rulings promulgated thereunder, and shall not be
so construed.

        13. Amendment. The Board shall have the right, without the consent or
approval of the Optionee, to amend, modify, limit or terminate this Option or
any term or provision hereof Any such action by the Board shall be final and
binding on Optionee.

        14. Shareholders Agreement. The grant of this Option is expressly
conditioned upon the contemporaneous execution by the Optionee and the Company
of a Stockholder Agreement, as provided in the Plan. All rights of Optionee as a
stockholder and heirs, successors and assigns shall be determined by such
agreement and the Optionee and heirs, successors and assigns shall be bound
thereby, including but not limited to the repurchase rights as provided in such
agreement.

        15. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

                                       83
<PAGE>   84

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Non-Qualified Stock Option Agreement as of the date first above
written.

        Address for Notices:                DALLAS SEMICONDUCTOR CORPORATION

        4401 South Beltwood Parkway
        Dallas, Texas 75244

                                       84
<PAGE>   85

          Form of Notice of Grant of Stock Options and Option Agreement

                                       85
<PAGE>   86

-------------------------------------------------------------------------------

                                        DALLAS SEMICONDUCTOR

NOTICE OF GRANT OF STOCK OPTIONS        ID:  75 19357 15 0

AND OPTION AGREEMENT                    4401 Beltwood Parkway South

                                        Dallas, TX  75244-3292

-------------------------------------------------------------------------------

                                        OPTION NUMBER:

                                        PLAN:

                                        ID:

-------------------------------------------------------------------------------

Effective           , you have been granted a(n) Non-Qualified Stock Option to
buy           shares of Dallas Semiconductor (the Company) stock at $       per
share.

The total option price of the shares granted is $

Shares in each period will become fully vested on the date shown.

         Shares             Vest Type        Full Vest         Expiration
         ------             ---------        ---------         ----------

--------------------------------------------------------------------------------

By your signature and the Company's signature below, you and the Company agree
that these options are granted under and governed by the terms and conditions of
the Company's Stock Option Plan as amended and the Option Agreement all of which
are attached and made a part of this document.

--------------------------------------------------------------------------------

-----------------------------------               ------------------------------
Dallas Semiconductor                              Date

-----------------------------------               ------------------------------
                                                  Date

                                       86
<PAGE>   87

                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT (the "Agreement") is made and entered into
this 9th day of July, 1993 (the "Date of Grant"), by and between DALLAS
SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and Richard
L. King, a director of the Company ("Optionee").

        WHEREAS, the Company's 1993 Officer and Director Stock Option Plan (the
"Plan") provides for the automatic grant of an option to purchase shares of the
Company's Common Stock, par value $.02 per share (the "Common Stock") to each of
the Company's non-employee directors in office on the date of adoption of the
Plan or subsequently elected, as therein provided, in furtherance of the
purposes of the Plan;

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. Grant of Option. The Company hereby confirms the automatic grant to
Optionee, pursuant to Section 7(b) of the Plan, the terms and provisions of
which Plan are incorporated herein by reference, of an option (the "Option") to
purchase all or any part of 100,000 shares of the Common Stock of the Company on
the terms and conditions herein set forth.

        2. Purchase Price. The purchase price of each share of Common Stock
subject to this Option shall be $14.75 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such

                                       87
<PAGE>   88

determinations shall be binding upon the Optionee. No shares may be issued until
full payment of the purchase price therefor has been made.

        3. Term of Option. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. Exercise of the Option. Subject to the provisions of Paragraph 14
hereof, this Option shall be exercisable in installments (subject to the right
of accumulation described below) so that this Option shall be exercisable for 25
% of the aggregate number of shares provided in Paragraph 1 hereof at the end of
first year of the term hereof and thereafter shall be exercisable for 6.25% of
such aggregate number of shares during each calendar quarter during the term
hereof (until it shall become fully vested at the end of sixteen (16) calendar
quarters from the Date of Grant); provided, however, that this Option, or any
unexercised portion hereof, shall become immediately exercisable in full upon
the occurrence of a Change of Control. To the extent an installment is not
exercised during the time stated, such installment shall accumulate and be
exercisable, in whole or in part, in any subsequent period during the term of
this Option. No fractional shares may be issued pursuant to the exercise of this
Option. Furthermore, the exercise of this Option shall be subject to the
condition that if at any time the Company shall determine in its sole discretion
that the satisfaction of withholding tax or other withholding liabilities, or
that the listing, registration, or qualification of any share otherwise
deliverable upon such exercise upon any national securities exchange or under
any state or federal law, or that the report to, or consent or approval of, any
regulatory body, is necessary or desirable as a condition of, or in connection
with, such exercise or the delivery or purchase of shares pursuant hereto, then
in any such event, such exercise shall not be effective unless such withholding,
listing, registration,

                                       88
<PAGE>   89

qualification, report, consent or approval shall have been effected or obtained
free of any conditions not acceptable to the Company.

        5. Notice of Election. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event, the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 10 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. Tax Benefit Right. The Board may in its sole discretion at any time
prior to the exercise of this Option grant to Optionee a bonus in an amount in
cash not to exceed the then existing maximum statutory Federal income tax rate
(including any surtax or similar charge or assessment) for individual taxpayers
multiplied by the amount of income, if any, realized by Optionee for Federal
income tax purposes as a result of the exercise of this Option. Any such
payment, if granted, shall be made by the Company upon the due date for such
taxes in the form of a check payable to the Internal Revenue Service for the
account of Optionee, or in such other manner as the Board in its sole discretion
may determine. Any such payment shall otherwise be

                                       89
<PAGE>   90

made upon such terms and conditions as may from time to time be determined by
the Board and such right shall be subject to limitation (as to term, amount, or
otherwise) and to cancellation at any time by the Board in its sole discretion.
Any grant of such a bonus to Optionee shall be on such terms and conditions, if
any, as may be permitted under Rule l6b-3 without adversely affecting any
requirement of such rule that the Plan be administered by disinterested persons.

        7. Company Loan. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Board may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the Board.

        (b) The Company shall have an obligation to make a loan to Optionee only
if the Board shall have determined in its sole discretion prior to the exercise
date that such loan should be made, but shall have no such obligation if the
Board shall have thereafter canceled or suspended the operation of the loan
provisions of the Man, or if the loan and/or other loans to be made at such time
would exceed any limit on the maximum amount of loans that may be made under the
Plan established from time to time by the Board in its discretion. Any loan
hereunder to Optionee shall be on such terms and conditions, if any, as may be
permitted by Rule 16b-3 without adversely affecting any requirement of such rule
that the Plan be administered by disinterested persons.

                                       90
<PAGE>   91

        (c) Such loan shall further be conditioned upon the delivery by Optionee
of such collateral as may be required by the Board and the execution by Optionee
of such stock powers or other instruments which the Board may deem necessary or
advisable in connection with such loan and creation of such security interest.

        8. Non-Transferability. During the lifetime of Optionee, this Option
shall be exercisable only by Optionee. This Option shall not be assignable or
transferable by Optionee, voluntarily or by operation of law, other than by will
or by laws of descent and distribution. Neither this Option nor the shares
covered hereby shall be pledged or hypothecated in any way. Neither this Option
nor the shares covered hereby shall be subject to the execution, attachment, or
similar process except with the prior written consent of the Board.

        9. Termination of Directorship. In the event that Optionee shall at any
time hereafter cease to be a director of the Company by reason of his removal
from office, any part of the Option granted hereunder which has not been
exercised by the date of such removal shall immediately terminate on the date of
such removal. In the event that Optionee's services as a director of the Company
shall terminate by reason of his resignation or retirement and Optionee shall
have then served as a director of the Company for more than three (3) years, the
vesting of any unexercised portion of this Option shall immediately accelerate,
so that any such unexercised portion of this Option may thereafter be exercised
by Optionee (or in the event of his subsequent death, by his Successor), at any
time prior to the date of its expiration. In the event Optionee has not served
as a director of the Company for more than three (3) years at the time of his
resignation or retirement, he (or, in the event of his subsequent death, his
Successor) shall be entitled to exercise, at any time prior to the date of
expiration of this Option, any unexercised portion of this Option exercisable by
Optionee at the time of his resignation or retirement.

                                       91
<PAGE>   92

        10. Death of Optionee. If Optionee dies prior to the termination of his
right to exercise this Option in accordance with the provisions hereof without
having fully exercised the Option, the vesting of any unexercised portion of
this Option shall immediately accelerate, so that any such unexercised portion
of this Option may thereafter be exercised by the Optionee's Successor, provided
this Option is exercised prior to the date of its expiration.

        11. Adjustments. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionees.

        12. No Other Rights or Obligations. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered hereby
until the date of the issuance of one or more stock certificates to him for such
shares pursuant to the due exercise of the Option. The granting of this Option
shall not confer on Optionee any continued right of service or tenure as a
director of the Company or any additional rights other than as expressly
provided for herein. There is no obligation upon Optionee to exercise this
Option or any part thereof.

        13. Subject to Plan. This option is subject to all of the terms and
conditions of the Company's 1993 Officer & Director Stock Option Plan (and as
amended if the Plan is amended hereafter). In the event of any conflict between
such terms and conditions and those set forth herein, the terms of the Plan
shall govern and be determinative.

        14. Stockholder Approval. This Option has been granted subject to the
approval of the Plan by stockholders of the Company. Notwithstanding the
provisions of Paragraph 4 hereof, this

                                       92
<PAGE>   93

Option may not be exercised unless and until the Plan has been duly approved by
the stockholders of the Company.

        15. Defined Terms. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Stock Option Agreement as of the date first above written.

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244                     By:       /s/ /C. V. Prothro
                                               ---------------------------------
                                        Title:
                                               ---------------------------------

Carnegie Hall Tower                                /s/ Richard L. King
152 West 57th St. - 18th Floor                 ---------------------------------
New York, New York 10019                    Optionee

                                       93
<PAGE>   94

                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT (the "Agreement") is made and entered into
this 21st day of July, 1999 (the "Date of Grant"), by and between DALLAS
SEMICONDUCTOR CORPORATION, a Delaware corporation (the "Company"), and MARLA K.
SUGGS ("Optionee").

        WHEREAS, the Company's 1993 Officer and Director Stock Option Plan (the
"Plan") provides that certain officers and directors of the Company may from
time to time be granted an option to purchase shares of the Company's Common
Stock, par value $.02 per share (the "Common Stock"), as therein provided, in
furtherance of the purposes of the Plan.

        NOW, THEREFORE, in consideration of the covenants herein set forth, the
parties hereto have agreed and do hereby agree as follows:

        1. GRANT OF OPTION. The Company hereby grants to Optionee an option (the
"Option") to purchase all or any part of 7,500 shares of the Common Stock of the
Company on the terms and conditions herein set forth.

        2. PURCHASE PRICE. The purchase price of each share of Common Stock
subject to this Option shall be $50.5625 per share. Full payment for shares
purchased upon exercise of this Option shall be made in cash or by check, or by
delivery of previously owned shares of Common Stock, or partly in cash or such
check and partly in such stock. The value of shares of Common Stock delivered in
connection with the payment of the option price shall be the fair market value
of such shares as determined by the Board of Directors of the Company (the
"Board") and such determinations shall be binding upon the Optionee. No shares
may be issued until full payment of the purchase price therefor has been made.

                                       94
<PAGE>   95

        3. TERM OF OPTION. The term of the Option shall be for a period of ten
(10) years from the Date of Grant, subject to earlier termination or
cancellation as provided herein and in the Plan.

        4. EXERCISE OF THE OPTION. This Option shall be exercisable in
installments (subject to the right of accumulation described below) so that this
Option shall be exercisable for 25% of the aggregate number of shares provided
in Paragraph I hereof at the end of first year of the term hereof and thereafter
shall be exercisable for 6.25% of such aggregate number of shares during each
calendar quarter during the term hereof (until it shall become fully vested at
the end of sixteen (16) calendar quarters from the Date of Grant); provided,
however, that this Option, or any unexercised portion hereof, shall become
immediately exercisable in full upon the occurrence of a Change of Control. To
the extent an installment is not exercised during the time stated, such
installment shall accumulate and be exercisable, in whole or in part, in any
subsequent period during the term of this Option. No fractional shares may be
issued pursuant to the exercise of this Option. Furthermore, the exercise of
this Option shall be subject to the condition that if at any time the Company
shall determine in its sole discretion that the satisfaction of withholding tax
or other withholding liabilities, or that the listing, registration, or
qualification of any share otherwise deliverable upon such exercise upon any
national securities exchange or under any state or federal law, or that the
report to, or consent or approval of, any regulatory body, is necessary or
desirable as a condition of, or in connection with, such exercise or the
delivery or purchase of shares pursuant thereto, then in any such event, such
exercise shall not be effective unless such withholding, listing, registration,
qualification, report, consent or approval shall have been effected or obtained
free of any conditions not acceptable to the Company.

                                       95
<PAGE>   96

        5. NOTICE OF ELECTION. Subject to the terms and conditions hereof,
Optionee may exercise this Option by delivering written notice to the Secretary
of the Company in person or by registered or certified mail, postage prepaid.
Such notice shall state the election to partially or totally exercise this
Option and the number of shares in respect of which it is being exercised, and
shall be signed by Optionee. Such notice shall be accompanied by payment as
provided for hereinbefore, in which event the Company shall deliver a
certificate or certificates, as may be requested by Optionee, representing such
shares as soon as practicable after the notice and payment shall be received.
The certificate or certificates for the shares as to which the Option shall have
been exercised shall be registered as designated in the notice. In the event the
Option shall be exercised, pursuant to Paragraph 10 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by proof
deemed appropriate by the Company of the right of such person or persons to
exercise the Option. All shares that shall be purchased upon the exercise of
this Option as provided herein shall be fully paid and non-assessable.

        6. TAX BENEFIT RIGHT. The Board may in its sole discretion at any time
prior to the exercise of this Option grant to Optionee a bonus in an amount in
cash not to exceed the then existing maximum statutory Federal income tax rate
(including any surtax or similar charge or assessment) for individual taxpayers
multiplied by the amount of income, if any, realized by Optionee for Federal
income tax purposes as a result of the exercise of this Option. Any such
payment, if granted, shall be made by the Company upon the due date for such
taxes in the form of a check payable to the Internal Revenue Service for the
account of Optionee, or in such other manner as the Board in its sole discretion
may determine. Any such payment shall otherwise be made upon such terms and
conditions as may from time to time be determined by the Board and

                                       96
<PAGE>   97

such right shall be subject to limitation (as to term, amount, or otherwise) and
to cancellation at any time by the Board in its sole discretion.

        7. COMPANY LOAN. (a) Subject to the provisions of subparagraph (b)
below, upon request of Optionee made at least three (3) business days prior to
the intended exercise date, the Board may (on such exercise date) loan to
Optionee an amount equal to the excess of the aggregate option price of the
Common Stock which Optionee is then electing to purchase pursuant to the
exercise of this Option, or any part hereof, over the aggregate par value of
such Common Stock, less any other consideration delivered by Optionee upon such
exercise, provided that Optionee shall execute a promissory note for such
amount, payable to the order of the Company, in such form as is in accordance
with the provisions of the Plan and as is otherwise satisfactory to the Board.

               (b) The Company shall have an obligation to make a loan to
Optionee only if the Board shall have determined in its sole discretion prior to
the exercise date that such loan should be made, but shall have no such
obligation if the Board shall have thereafter canceled or suspended the
operation of the loan provisions of the Plan, or if the loan and/or other loans
to be made at such time would exceed any limit on the maximum amount of loans
that may be made under the Plan established from time to time by the Board in
its discretion.

               (c) Such loan shall further be conditioned upon the delivery by
Optionee of such collateral as may be required by the Board and the execution by
Optionee of such stock powers or other instruments which the Board may deem
necessary or advisable in connection with such loan and creation of such
security interest.

                                       97
<PAGE>   98

        8. NON-TRANSFERABILITY. Other than by will or by laws of descent and
distribution, this Option shall be assignable or transferable by Optionee only
if and under terms and conditions approved by the Board in its sole discretion.
Neither this Option nor the shares covered hereby shall be pledged or
hypothecated in any way. Neither this Option nor the shares covered hereby shall
be subject to the execution, attachment, or similar process except with the
prior written consent of the Board.

        9. TERMINATION OF SERVICE AS CORPORATE SECRETARY. In the event that
Optionee shall at any time hereafter cease to serve as Corporate Secretary of
the Company for any reason, including, but not limited to, her retirement,
permanent disability or death, any part of the Option granted hereunder which
has not been exercised by the date of such cessation shall, on the date of such
cessation, become immediately exercisable and may be exercised by Optionee, or
by the Optionee's Successor, provided the Option is exercised prior to the date
of its expiration.

        10. ADJUSTMENTS. The number of shares of Common Stock covered by this
Option and the option price may be adjusted to reflect, as deemed appropriate by
the Board in its discretion, any stock dividend, stock split, share combination,
exchange of shares, recapitalization, merger, consolidation, separation,
reorganization, liquidation or the like of or by the Company. Decisions by the
Board as to what adjustments shall be made, and the extent thereof, shall be
final, binding and conclusive on Optionee.

        11. NO OTHER RIGHTS OR OBLIGATIONS. Optionee shall have no rights by
reason of this Option as a stockholder with respect to any shares covered
thereby until the date of the issuance of one or more stock certificates to her
for such shares pursuant to the due exercise of the Option. The granting of this
Option shall not confer on Optionee any continued right to employment or

                                       98
<PAGE>   99

tenure as an officer of the Company or any additional rights other than as
expressly provided for herein. There is no obligation upon Optionee to exercise
this Option or any part thereof.

        12. DEFINED TERMS. Unless otherwise defined herein, the capitalized
terms used herein shall have the same meaning given to such terms in the Plan.

        IN WITNESS WHEREOF, Dallas Semiconductor Corporation and Optionee have
executed this Stock Option Agreement as of the date first above written.

Address for Notices:                    DALLAS SEMICONDUCTOR CORPORATION

4401 South Beltwood Parkway
Dallas, Texas 75244   By:               By:    /s/ C. V. Prothro
                                              ----------------------------------
                                               C. V. Prothro

                                        Title:
                                              ----------------------------------
                                               Chairman of the Board, President
                                               and Chief Executive Officer

501 Brian Drive                         /s/ Marla K. Suggs
------------------------------          ----------------------------------------
                                            Marla K. Suggs, Optionee
Grand Prairie, TX  75052
------------------------------
Address of Optionee

                                       99

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