Document:

<PAGE>

                                                                   EXHIBIT 10.18

                [LOGO OF GENERAL INSTRUMENT/(R)/ APPEARS HERE]

                            C 0 N F I D E N T I A L
                            -----------------------

                       DEVELOPMENT AND SUPPLY AGREEMENT

                                by and between

                                MICROTUNE, INC.

                                      and

                        GENERAL INSTRUMENT CORPORATION

                                 JUNE 14, 2000
<PAGE>

     DEVELOPMENT AND SUPPLY AGREEMENT dated this 14th day of June, 2000 by and
between GENERAL INSTRUMENT CORPORATION, a Delaware corporation doing business as
the Broadband Communications Sector of Motorola, Inc.  and having an office at
101 Tournament Drive, Horsham, PA 19044 ("Buyer"), and MICROTUNE, INC., a Texas
corporation with its principal place of business at 2540 East Plano Parkway,
Suite 188, Plano, Texas 75074 ("Seller" and collectively with the Buyer, the
"Parties").

W I T N E S S E T H:
-------------------

     WHEREAS,  Seller has expertise in developing and manufacturing RF tuner
devices which may be used in a variety of broadband communication applications,
including cable modem, set top box and IP telephony products; and

     WHEREAS, Buyer desires to have Seller develop and manufacture for Buyer,
and Seller is willing to develop and manufacture for Buyer, and Buyer desires to
purchase from Seller, RF tuner modules for Buyer's cable modem, set top box and
IP telephony products; and

     WHEREAS, it is the intention of both parties to establish a strategic
alliance pursuant to which Seller is a preferred RF tuner supplier for Buyer and
Buyer is a strategic customer of Seller;

     NOW, THEREFORE, in consideration of the premises and mutual covenants set
forth in this Agreement, the parties, intending to be legally bound, agree as
follows:

ARTICLE 1.  DEFINITIONS

     All defined terms used herein but not otherwise defined shall have the
meanings set forth in Exhibit A.

ARTICLE 2.  DEVELOPMENT OF PRODUCTS

2.1  Development Program

     (a)  The Parties shall establish a development program (the "Development
          Program") for the development of silicon tuners (the "Silicon Tuners")
          in accordance with the terms of the letter agreement dated the date
          hereof by and between Seller and Buyer (the "Development Agreement"),
          a copy of which is attached as Exhibit B hereto.

     (b)  Buyer will make engineering resources available on a reasonable basis
          to work with Seller to qualify the ***** Microtune RF tuner module
          (together with Seller's *****, the "RF Tuner Modules") into Buyer's
          Surfboard cable modem line, with the initial focus to target DOCSIS
          qualification ***** of Seller's tuner module in the SB4100 product
          during *****.

     (c)  Buyer will make engineering resources available on a reasonable basis
          to work with Seller to develop RF tuner modules for Buyer's set top
          and IP telephony DOCSIS applications.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

     (d)  Buyer will make engineering and procurement resources available on a
          reasonable basis to evaluate the technical and commercial feasibility
          of designing in the Seller solution for Analog video RF tuners. Buyer
          shall also provide to Seller its specifications required to meet the
          performance of the current analog tuner in production in the *****
          by July 1, 2000.

2.2  Delivery and Acceptance of Development  Products

     After the release of the Silicon Tuners for commercial production in
accordance with the Development Agreement, the Silicon Tuners shall become
Products which may be purchased and sold pursuant to this Agreement. After the
qualification of the ***** Microtune RF tuner module into Buyer's Surfboard
cable modem line, the ***** Microtune RF tuner module shall become a Product
which may be purchased and sold pursuant to this Agreement.

ARTICLE 3. PURCHASE AND SALE OF PRODUCTS

3.1  Right to Purchase.

     (a)   Buyer agrees to purchase and Seller agrees to sell, in such
quantities and at such prices as are set forth in Sections 3.10 and 6.5 and in
purchase orders or releases ("Orders") received and accepted (or deemed
accepted, as provided in Section 3.1(c) hereof) by Seller and as provided
hereunder, the products specified in Exhibit C (the "Products") Orders for the
Products may be placed by any of the divisions, subsidiaries and affiliates of
Buyer listed on Exhibit D hereto (each hereinafter considered to be a "Buyer"
for purposes of this Agreement) which may be amended by Buyer at any time to
include additional locations for such divisions, subdivisions and affiliates.

     (b)   Subject to Section 3.3, nothing contained in this Agreement shall
restrict Buyer from purchasing Products, or components thereof, from other
suppliers.

     (c)   For purposes of this Agreement any Order for a Product within the
lead time for such Product as set forth in Exhibit C and which is for a quantity
of such Product which does not exceed the lesser of (i), after taking into
account any other Products ordered by Buyer at the same time, ***** of the total
quantity of RF tuner modules utilizing the ***** that Seller's manufacturing
facilities are capable of producing and (ii) the amount of such Product
forecasted to be ordered in the most recent Rolling Forecast for the period in
which such Order is placed, may not be rejected by Seller and shall be deemed
accepted for all purposes of this Agreement, regardless of whether accepted or
acknowledged by Seller.

3.2  Content of Orders (Terms and Conditions); Acknowledgment.

     (a)   Buyer shall issue Orders for Products Buyer elects to purchase in
accordance with the lead times set forth in Exhibit C and the other terms of
this Agreement.

     (b)   All sales shall be pursuant to the "Terms of Purchase" attached
hereto as Exhibit E and incorporated herein by reference (the "Terms of
Purchase"). In the event of a conflict between the terms and conditions
contained in this Agreement and the Exhibits attached hereto, on the one hand,
and Buyer's standard terms and conditions of purchase and

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       2
<PAGE>

any Order or any acknowledgement or acceptance by Seller, on the other hand, the
terms and conditions contained in this Agreement and the Exhibits attached
hereto shall control. The parties acknowledge that the preprinted provisions on
the reverse side of any such Order, quotation, release, acknowledgment or
invoice shall be deemed deleted.

3.3  Forecasts.

     Buyer will provide Seller with a written twelve (12) month forecast (the
"Rolling Forecast") of its anticipated orders of Products, broken down on a
monthly basis. Buyer's Rolling Forecasts shall constitute good faith estimates
on the part of the Buyer and Buyer shall not be obligated to purchase any
quantities estimated in a Rolling Forecast; provided, that Buyer shall be
obligated  to purchase quantities of the Products as set forth in an Order
(including any modified Order pursuant to Section 3.8) and as may be required by
operation of the provisions of Section 3.10.

3.4  No Commitment to Purchase Minimum Amount.

     Except as otherwise expressly set forth in this Agreement (including
without limitation in Section 3.10), this Agreement is a non-commitment contract
and Products shall be manufactured, purchased and sold only on an "as ordered"
basis.

3.5  Reports.

     Seller, at Buyer's reasonable request, shall issue reports on the status of
open Orders.  Seller shall provide such other information as Buyer may
reasonably request from time to time.

3.6  Time is of the Essence

     Time is of the essence with respect to all Orders placed under this
Agreement.

3.7  Purchase Agreement Coordinators.

     To facilitate implementation of this Agreement, Buyer and Seller designate
the individuals listed on Exhibit F as their "Purchase Agreement Coordinators".
The respective Purchase Agreement Coordinators are authorized to act on behalf
of Seller and Buyer under this Agreement.

3.8  Quantity Increases and Shipment Schedule Changes.

     For any accepted Order, Buyer may (i) increase the quantity of Products or
(ii) reschedule the quantity of Products and their shipment date as provided in
the table below:

                                       3
<PAGE>

   Maximum Allowable Variance From Purchase Order Quantities/Shipment Dates
   ------------------------------------------------------------------------

          # of days before     Allowable   Maximum     Maximum
          Shipment Date        Quantity   Reschedule  Reschedule
          on Purchase Order    Increases   Quantity     Period
          -------------------  ---------  ----------  ----------
          0-30                 *****      *****       ***** days
          61-90                *****      *****       ***** days
          91-120               *****      *****       ***** days
          121                  *****      *****       ***** days

Any Order quantities increased or rescheduled pursuant to this Section may not
be subsequently increased or rescheduled without the prior written approval of
Seller.  All other changes in quantity or shipment date require Seller's prior
written consent and shall be subject to an inventory carrying charge of *****
per month for finished Product, and Inventory and Approved Special Inventory
procured to support the original schedule.  Allowable quantity increases are
subject to material availability.  Seller will use reasonable commercial efforts
to meet quantity increases.  If there are extra costs to meet a schedule
increase in excess of the above limits, Seller will inform Buyer in advance of
incurring such extra costs in order to provide Buyer an opportunity to approve
such extra costs (and Buyer shall have no obligation with respect to any such
extra costs not approved by Buyer in writing) or to revise the schedule to avoid
such extra costs.  Buyer and Seller agree to mutually review and revise the
terms of this Section  for the Silicon Tuners.

3.9  Cancellation.

     Except as provided in Sections 3.10 and 6.5 below, Buyer shall be entitled
to cancel any Order, or any portion of an Order, by giving Seller written notice
of such cancellation. The cancellation shall be effective immediately upon
receipt of the notice by Seller. Should Buyer cancel any Order, or any portion
of any Order, for any reason not otherwise permissible under the terms of this
Agreement, Buyer's sole liability and responsibility and the sole remedy of
Seller with respect to such cancellation shall be payment by Buyer of a
cancellation charge, which shall consist of the following:

          (i)  the contract price for all Product in a finished goods state at
     the time of cancellation, limited to that quantity of the Product that was
     scheduled under the cancelled Order for delivery within the next *****
     days;

          (ii) the cost of all Inventory required for the cancelled Products and
     for which Seller is liable at the time of cancellation, whether on order,
     or on hand in raw form or in the form of work-in-process, which cannot be
     cancelled, returned to vendors or used for other customers, less salvage
     value.

3.10 Special Purchase Arrangements

     (a)  Subject to the following provisions of this Section 3.10(a), Buyer
agrees to purchase from Seller on a nonchangeable and noncancellable basis, and
Seller agrees to sell

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       4
<PAGE>

to Buyer, the following quantities of qualified DOCSIS and EuroDOCSIS RF Tuner
Modules or Silicon Tuners for delivery during the following calendar quarters:

--------------------------------------------------------------------------------
             Calendar Quarter               Aggregate Quantity
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
                 4Q 2000                         *****
--------------------------------------------------------------------------------
                 1Q 2001                         *****
--------------------------------------------------------------------------------
                 2Q 2001                         *****
--------------------------------------------------------------------------------

The mix of the Products to be purchased and sold, which may consist of any
combination of RF Tuner Modules or Silicon Tuners at Buyer's sole discretion,
and the delivery dates within such calendar quarters for such Products shall be
determined by Orders submitted by Buyer in accordance with the provisions of
this Agreement. In the event that Buyer submits Orders for the delivery of
Products in excess of the amounts set forth above for such calendar quarters,
Seller shall use all commercially reasonable efforts to accept and fill such
Orders, but Seller shall have no obligation to allocate any production capacity
required by Seller's other customers to satisfy such excess amounts requested by
Buyer. Buyer's obligation to submit such Orders and to purchase such Products
are subject to the Seller's satisfaction of the following minimum technology,
quality, delivery, and other performance and cost criteria with respect to each
Product:

        (i)    technology: product compliance with the product specific
               functional specifications referred to in Exhibit G; product is
               DOCSIS certifiable; product passes Buyer's qualification testing.
               The current tuner specification is General Instrument *****
               specification ***** and General Instrument ***** specification
               *****. Both parties acknowledge that Seller's current product,
               the *****, conforms to the ***** specification and the *****
               conforms to the ***** specification, *****. Further, if any parts
               of Buyer's specifications are waived or deviated by Buyer for any
               other tuner supplier, those same parts of the specifications
               shall be waived or deviated for Seller. The Seller will be
               notified in a timely manner of any such waivers or deviations.

        (ii)   quality: product quality meets minimum quality standards set in
               product specification; product failure rate in production
               decreases in accordance with a mutually acceptable minimum
               learning curve.

        (iii)  delivery: product is available in the quantities set forth in
               Buyer's Rolling Forecasts (not exceeding ***** of the total
               quantity of RF tuner modules utilizing the ***** which Seller's
               manufacturing facilities are capable of manufacturing) and within
               the time schedule set forth in Buyer's Rolling Forecasts as
               specified in this Agreement.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       5
<PAGE>

           (iv)  cost: product meets or exceeds the cost learning curve as
                 specified in Exhibit C.

      (b)  Buyer shall have no obligation to submit Orders for the delivery of
Products on or after *****, except as set forth in this Section 3.10(b). On or
before *****, Buyer may send to Seller a proposal referring to this Section (the
"Buyer's Proposal") to order Products at a specified price for delivery during
the *****. Seller may accept Buyer's Proposal by a written acceptance (the
"Seller's Acceptance") delivered to Buyer within thirty (30) days after Seller's
receipt of the Buyer's Notice. In the event that Seller has timely provided the
Seller's Acceptance to Buyer, Buyer shall be obligated to submit to Seller, and
Seller shall be obligated to accept, Orders in accordance with the terms of this
Agreement for any combination of qualified DOCSIS and EuroDOCSIS RF tuner
modules which represents an aggregate amount of at least ***** of the total
aggregate quantity of qualified DOSCIS and EuroDOCSIS RF Tuner Modules that
Buyer orders from all suppliers for Buyer's cable modem, IP telephony, and set
top products concerning which Seller has a qualified Product, subject to the
Seller's satisfaction of the minimum technology, quality, delivery, and other
performance and cost criteria described in (i) through (iv) of Section 3.10(a)
or as otherwise agreed in writing with respect to each Product.

3.11  [Most Favored Customer]

      Buyer will receive pricing terms on any and all of Seller's products,
including the Products, which are *****. Seller shall also make available for
purchase by Buyer on such terms any and all new products developed by Seller.

ARTICLE 4. TERM AND TERMINATION

4.1   Term.

      The term of this Agreement shall commence on the date hereof and shall
continue until December 31, 2001, subject to earlier termination pursuant to
Section 4.2 hereof.  Unless otherwise terminated by either party by written
notice at ninety (90) days prior to the expiration of the term, this Agreement
shall renew for additional one (1) year periods.

4.2   Termination.

      Buyer or Seller may terminate this Agreement at any time if (i) the other
party has breached any provision hereof, including, without limitation, any
representation or warranty contained herein where the breaching Party fails to
cure such breach within thirty (30) days following receipt of notice of such
breach from the non-breaching Party; or (ii) either Party making an assignment
for the benefit of creditors, or if a receiver, trustee in bankruptcy or similar
officer shall be appointed to take charge of any and all of the other parties
property, or if the other Party files a petition for reorganization of its
indebtedness or other similar activities

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       6
<PAGE>

4.3  Effect of Termination.

     Termination of this Agreement for any reason shall not affect the
obligations of either party that exist as of the date of termination.

ARTICLE 5. PRICES AND PAYMENT

5.1  Prices; Shipping.

     The purchase prices for the Products are set forth in Exhibit C and are
subject to adjustment as hereinafter provided.

5.2  Payment of Invoices.

     Buyer's payment of any invoice shall not constitute acceptance of the
Products related to such invoice.

5.3  Delivery of Invoices.

All invoices shall reference this Agreement and shall be submitted to Buyer at:

     Motorola, Inc.
     101 Tournament Drive
     Horsham, Pennsylvania 19044
     Attention:  Accounts Payable

With a copy to Buyer's designated Purchase Agreement Coordinator listed in
Exhibit F. All invoices shall contain such information as Buyer shall reasonably
request.

5.4  Payment Terms.

     Payment for a conforming Product shall be due (i) for invoices received by
Buyer prior to the first anniversary of the date of this Agreement, within *****
days after Buyer's receipt of the invoice and (ii) for invoices received by
Buyer after the first anniversary of the date of this Agreement, within *****
days after Buyer's receipt of the invoice. Payments shall be made in lawful U.S.
currency.

ARTICLE 6. MANUFACTURING OF PRODUCTS

6.1  Specifications and Drawings.

     On or before the date of this Agreement, Buyer shall have delivered to
Seller all information and documentation necessary to permit Seller to perform
its obligations under this Agreement. Such information includes, but is not
limited to the information listed in Exhibit G. All Products will be
manufactured in accordance with the Specifications (see Section 3.10(i)). Seller
shall make no change to the Specifications, to any materials or component parts
described therein, or to the Products, including, without limitation, changes in
form, fit, function, design, appearance or place of manufacture of the Products
or changes which would affect the reliability of any of the Products, without
Buyer's express written consent obtained in

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       7
<PAGE>

accordance with the "Product/Process Change Request Notification" procedure
***** found in Exhibit K.

6.2  Initial Qualification.

     Prior to the commercial production of any of the Products, the Products and
components thereof shall be qualified in accordance with the acceptance test
procedures and qualification plans set forth in Exhibit I, and Exhibit K . The
methods of testing for the qualification of the Products and components thereof,
and the timetable for the qualification of the Products, shall be as set forth
in Exhibit I or as otherwise agreed to between the parties. The current tuner
specification is General Instrument ***** specification ***** and General
Instrument ***** specification *****. Both parties acknowledge that, *****,
Seller's current products, the *****, have been qualified in accordance with the
acceptance test procedures and qualification plans set forth in Exhibit I, and
Exhibit K.

6.3  Manufacturing Location; Restriction on Subcontracting.

     Seller shall initially manufacture the Products, which are RF tuner
modules, at Seller's facilities in Manila, Philippines ("Seller's Facility").
The Products shall not be manufactured for Buyer by any person or entity other
than Seller, without Buyer's express written consent, which shall not be
unreasonably withheld. Buyer reserves the right to audit and approve any
contract manufacturer or alternate location Seller proposes to manufacture
Products. The Silicon Tuners may be manufactured at locations other than Manila
which are mutually acceptable to Seller and Buyer. As of the date of this
Agreement, Buyer acknowledges that IBM's facilities in Burlington, Vermont and
xFab's facilities in Erfert, Germany are acceptable facilities for wafer
fabrication, Amkor/Anam's facilities in Korea and the Philippines are acceptable
facilities for assembly and testing, Seller's facilities in Plano for testing
and any facilities currently used for fabrication, assembly or testing by
Motorola's Semiconductor Division are acceptable facilities for fabrication,
assembly or testing.

6.4  Material Procurement.

     (a) Seller shall purchase materials to manufacture Products necessary to
comply with its obligations to supply Products specified in Exhibit C.  Seller
shall use in its production of Products such parts and components of a type,
quality, and grade as were used in the Products when they were initially
qualified under this Agreement.  Seller shall make no substitution of any
components, raw materials or vendors which would affect the reliability of the
Products without Buyer's written consent.  In the event such substitution is
requested by Seller, Seller shall provide documented evidence of the
qualification of such components, raw materials or vendors in accordance with
Buyer's Component Qualification Procedures identified in Exhibit K.  Seller
shall not use materials with date codes older than one (1) year without Buyer's
consent.

     (b) Buyer's accepted Orders will constitute authorization for Seller to
procure, using the purchasing practices set forth in this Agreement, the
components, materials and supplies necessary for the manufacture of Products
("Inventory") covered by such purchase orders.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       8
<PAGE>

     (c)  In addition, Buyer may authorize Seller to purchase, in amounts beyond
the amount necessary to fill accepted Orders, the components, materials, and
supplies: (i) with lead times greater than ***** days at the time the Order is
placed ("Long Lead Time Components") plus ***** days to account for the order,
shipment, receipt and manufacturing time and, (ii) purchased in quantities above
the required amount in order to achieve price targets ("Economic Order
Inventory"), and (iii) purchased in excess of requirements because of minimum
lot sizes available from manufacturers ("Minimum Order Inventory"). Together
these are called "Special Inventory". Seller shall notify Buyer's Purchaser
Representative of its intent to Purchase Special Inventory at least ten (10)
days prior to such purchase. Such notice shall contain a detailed identification
of the Special Inventory to be purchased, the proposed purchase price, the
vendor supplying the Special Inventory, and a reference to Buyer's obligations
under this Section. During the ten day period, Buyer shall notify Seller whether
or not the purchase of such Special Inventory is authorized. In the event Buyer
notifies Seller that Seller is authorized to purchase such Special Inventory,
the Special Inventory shall be considered to be "Approved Special Inventory" for
purposes of this Agreement. In the event Buyer does not so notify Seller, Seller
shall consider the purchase of the Special Inventory not to be authorized by
Buyer and such Special Inventory shall not be considered "Approved Special
Inventory" for any purpose of this Agreement.

     (d)  Seller may purchase Long Lead Time Components sufficient to meet all
deliveries under the Orders in effect at the time the order with the supplier is
placed, and may reasonably purchase Minimum Order Inventory even if greater than
the amount necessary to meet Orders and Product forecast, in each case only if
authorized by Buyer as set forth in Section 6.4(c) above.  Seller may, from time
to time, at the written request of Buyer hold Long Lead Time Components and
finished Products in inventory to increase Buyer's sourcing flexibility in
amounts authorized by Buyer and at the expense of Buyer.  The components and
quantities of all such inventory will be documented in a separate letter and
signed by both Seller and Buyer.

     (e)  Buyer will be responsible for all Approved Special Inventory purchased
by Seller under this Section 6.4 if such purchases are authorized by Buyer
pursuant to this Section 6.4.  Seller shall be responsible for any Special
Inventory not approved by Buyer and all other Inventory.

6.5  ALLOCATION OF PRODUCTION CAPACITY

     Throughout the term of this Agreement, Seller shall make available for
purchase by Buyer at least ***** of the total quantity of RF tuner modules
utilizing the ***** its manufacturing facilities are capable of producing within
Seller's historical lead times for the production of such products. Without
limiting the general nature of Seller's foregoing obligation to allocate its
manufacturing capacity, in no event shall the quantity of RF tuner modules
utilizing the ***** available for purchase by Buyer be less than the following
amounts during the following periods:

            Time Period              Minimum Quantity
            -----------              ----------------

            4/1/00 to 6/30/00        *****

            7/1/00 to 9/30/00        *****

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       9
<PAGE>

Seller will use all commercially reasonable efforts to supply an additional
***** RF Tuner Modules  to Buyer during the months of June and July 2000.

Buyer agrees to pay Seller a unit price of ***** for delivery of Products from
the period of April 1, 2000 through *****. During the second ***** quarters of
2000 and any period in which Buyer requires at least ***** of Seller's
manufacturing capacity in accordance with this Agreement, Buyer's Orders shall
be noncancelable, but may be modified in accordance with the provisions of
Section 3.8.

ARTICLE 7. EXCLUSIVE PRODUCTS; LICENSES

7.1  Exclusive Products.

     Seller shall not sell any Products incorporating Buyer's Technology to any
other party during or after the term of this Agreement.  For avoidance of doubt,
Seller represents that it will not be necessary to, and that it will not,
incorporate Buyer's Technology into any Product hereunder.

7.2  Proprietary Rights.

     Seller hereby confirms that Buyer has and shall retain the sole right,
title, and interest in and to all proprietary rights in Buyer's Intellectual
Property, including all patents, patent applications, copyrights, trade secrets
or other proprietary rights relating to or embodied therein, including all
documentation, methods, processes, software, and information relating to or
embodied therein ("Buyer's Technology"). Buyer hereby confirms that Seller has
and shall retain the sole right, title, and interest in and to all proprietary
rights in Seller's Products and Seller's Intellectual Property, including all
patents, patent applications, copyrights, trade secrets or other proprietary
rights relating to or embodied therein, including all documentation, methods,
processes, software, and information relating to or embodied therein ("Seller's
Technology").

7.3  Transactions With Other Parties.

     Subject to the provisions of Section 7.1, Seller shall have the right to
separately manufacture and sell to others products which are comparable to the
Products. Nothing contained in this Section 7.3 shall permit Seller to use any
proprietary information or rights of Buyer, including, without limitation,
Buyer's Technology for that purpose or for the purpose of designing or
developing products.

ARTICLE 8. CONFIDENTIALITY

     The terms and conditions of the Non-Disclosure Agreement (the "NDA")
attached hereto as Exhibit H are incorporated herein by reference as if the
entire NDA were set forth herein with the exception that the term of the NDA
shall extend for the term of this Agreement, provided that any termination of
the this Agreement shall not relieve either party from its obligations imposed
by this Agreement with respect to nondisclosure, confidentiality and use of the
Confidential Information disclosed prior to the date of termination.  The
obligations imposed upon the parties under this Agreement shall continue for a
period of ***** years after the receipt of the Confidential Information.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       10
<PAGE>

ARTICLE 9.  EXCUSED PERFORMANCE

     A party shall be excused from performing an obligation under this Agreement
and shall not be considered in default to the extent such party's performance
has been prevented, in whole or in part, by (i) an act of Force Majeure (as
defined below), or (ii) the non-performance of any other party to this
Agreement; provided, however, that a party shall not be so excused from the
performance of its obligations under this Agreement to the extent that the other
party's non-performance is attributable to the party seeking to be excused from
the performance of its obligations under this Agreement failing to perform its
obligations under this Agreement. "Force Majeure" shall mean, without
limitation, (a) any act of God, war, riot, fire, rupture, explosion, flood,
strike, injunction, governmental action, inaction, or order, transportation
failures, unavailability of materials, supplies or energy, or unscheduled outage
or shut-down, (b) any lockout or other labor disturbance, even if such lockout
or disturbance is within the power of a party to settle, or (c) any other cause,
whether similar or dissimilar to the foregoing, which is beyond the reasonable
control of a party (or any affiliate of such party) claiming Force Majeure
interference with the performance of such party under this Agreement. Upon the
occurrence of Force Majeure, the obligations of the party whose performance has
not been affected shall be suspended and such party shall have the rights
available to it under the Uniform Commercial Code.

ARTICLE 10. AGREEMENT

     This Agreement, the Exhibits and all Orders issued hereunder constitute the
final written expression of all terms of the Agreement relating to the
transactions described herein.  This Agreement supersedes all previous
communications, representations, agreements, promises or statements, either oral
or written, with respect to such transactions.  No addition to or modification
of any provision of this Agreement will be binding unless made in writing.

ARTICLE 11. GOVERNING LAW

     The rights and obligations of the parties under this Agreement shall be
governed and determined according to the substantive laws of the State of
California (excluding the conflict of laws principles thereof).

ARTICLE 12. PUBLICITY

     Buyer and Seller will issue a joint press release announcing the
relationship, including development of the single chip silicon tuner, upon
execution of this Agreement and prior to the marketing of initial public
offering of Microtune securities. In addition, Buyer acknowledges that Seller
may be required to file a copy of this Agreement with the Securities and
Exchange Commission. In connection with such filing, Seller shall make an
initial request for confidential treatment for any of the terms of this
Agreement designated by Buyer. In responding to any comments made or positions
taken by the Securities and Exchange Commission with respect to Seller's request
for confidential treatment, Seller shall notify Buyer of such comments or
positions and, to the extent the procedures of the Securities and Exchange
Commission provide it an opportunity to do so, shall use commercially reasonable
efforts to obtain confidential treatment for the terms of this Agreement
designated by Buyer, but shall have no obligation to Buyer if the Securities and
Exchange Commission ultimately declines to provide such confidential treatment
to the terms designated by Buyer.

                                       11
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the date and year first above written.

Buyer:                                  Seller:

GENERAL INSTRUMENT CORPORATION          MICROTUNE, INC.

By:     /s/ Keith C. Jones              By:     /s/ Douglas J. Bartek
     -----------------------------           ------------------------

Name:   Keith C. Jones                  Name:   Douglas J. Bartek
Title:  V.P. & Director, Supply Mgmt.   Title:  CEO and Chairman
Date:   June 14, 2000                   Date:   June 14, 2000

                                       12
<PAGE>

                                   EXHIBIT A

                                  DEFINITIONS

     "Business Day" means a day other than a Saturday, Sunday, Holiday or other
day on which commercial banks located in Philadelphia, Pennsylvania or Dallas,
Texas are obligated or authorized by law to close.

     "Buyer's Designated Warehouse" means each of  those warehouses designated
by Buyer which are set forth on Exhibit D hereto.

     "Confidential Information" has the meaning referred to in the NDA.

     "Critical Defect" means a Defect that might reasonably be expected to
endanger life or be a hazard to health, including, but not limited to, Defects
that might give an electric shock or create a fire hazard.

     "Defect" means  any malfunction of a Product, or any adverse deviation of a
Product  from the Specifications.

     "Field Rejection Rate" means, with respect to a Product, the percentage of
units of such Product delivered to Buyer since the commencement of this
Agreement which (i) have a Critical Defect or a Major Defect discovered prior to
or upon installation of the Product by Buyer's customer, or (ii) have been
returned to Seller for warranty repair under this Agreement. A Critical Defect
or Major Defect arising solely from a defect in design furnished by Buyer shall
not be included in the calculation of Field Rejection Rate.

     "Buyer's Intellectual Property" means all of Buyer's technology,
techniques, software, proprietary databases, patents, copyrights, mask works,
trade secrets and practices, Buyer's Know-how, methods, specifications, designs,
design elements and all other intellectual property provided or disclosed to
Seller by Buyer in the course of the parties' transactions under, or in
contemplation of, this Agreement.

     "Seller's Intellectual Property" means all of Seller's technology,
techniques, software, proprietary databases, patents, copyrights, mask works,
trade secrets and practices, Sellers Know-how, methods, specifications, designs,
design elements and all other intellectual property provided or disclosed to
Buyer by Seller in the course of the parties' transactions under, or in
contemplation of, this Agreement.

     "Buyer's Know-how" means all information and data not generally known
(including formulae, procedures, protocols, techniques and results of
experimentation and testing) which are necessary or useful to make the Products,
which is owned by or licensed to Buyer and which has been disclosed by Buyer to
Seller prior to or during the term of this Agreement; all to the extent and only
to the extent that Buyer now has or hereafter will have the right to grant
licenses, immunities or other rights thereunder.

     "Seller's Know-how" means all information and data not generally known
(including formulae, procedures, protocols, techniques and results of
experimentation and testing) which
<PAGE>

are necessary or useful to make the Products, which is owned by or licensed to
Seller independent of Buyer.

     "Major Defect" means a Defect that causes a unit of a Product to be
functionally inoperative, materially unusable, or unable to meet the
Specifications in any material respect.  No Product shall be considered to have
a Major Defect if a Major Defect cannot be detected after the return of the
Product to Seller pursuant to mutually acceptable testing procedures.

     "Minor Defect" means a Defect that does not reduce the reliability or
usability of a unit or Product.

     "Products" means all products listed in Exhibit C attached hereto, as such
exhibit may be amended from time to time, and any portion(s) of any of such
Products, and in any subsequent Exhibits as hereafter mutually agreed upon and
attached hereto and made a part hereof, as the context may require.

     "Specifications" means the specifications, drawings and technical
information attached or referenced to in Exhibit G hereto, (including, without
limitation, General Instrument ***** specification ***** and General Instrument
***** specification ***** as such exhibit may be revised by Buyer from time to
time, as well as all supplementary specifications and related documents which
Buyer may provide to Seller from time to time and which are designated as part
of the Specifications covered by this Agreement.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

<PAGE>

                                   EXHIBIT B

                             DEVELOPMENT AGREEMENT

     DEVELOPMENT AGREEMENT dated as of the ___ day of June, 2000 by and between
GENERAL INSTRUMENT CORPORATION, a Delaware corporation doing business as the
Broadband Communications Sector of Motorola, Inc.  and having an office at 101
Tournament Drive, Horsham, PA 19044 ("Buyer"), and MICROTUNE, INC., a Texas
corporation with its principal place of business at 2540 East Plano Parkway,
Suite 188, Plano, Texas 75074 ("Seller" and collectively with the Buyer, the
"Parties").

                                   Background

     Buyer and Seller are parties to a Development and Supply Agreement dated
the date hereof (the "Purchase Agreement"). This is the Development Agreement
referred to in the Purchase Agreement.

                                   Agreement

     NOW, THEREFORE, the parties hereto, intending to be legally bound, hereby
agree as follows:

1.0  Silicon Tuner Program.   Buyer will provide technical guidance to Seller on
the development of a single chip silicon tuner, providing access to Buyer's
engineering resources as defined below:

     1.1  Seller will provide a confidential copy of the silicon tuner product
          specification to Buyer no later than July 1, 2000.

     1.2  Buyer will review and provide feedback on all specifications within 30
          days of receiving the specification.

     1.3  Seller will use commercially reasonable efforts to incorporate Buyer's
          feedback to the final specification, which shall be delivered to Buyer
          no later than ***** after receipt by Seller of Buyer's feedback.

     1.4  Seller shall fabricate, specify (in the manner provided herein),
          design, simulate, prototype, assemble, test, and deliver a prototype
          silicon tuner in accordance with the final specification no later than
          *****.

     1.5  Buyer will develop or modify an existing cable modem and/or IP
          telephony and/or set-top box design to receive either a silicon tuner
          or silicon tuner-based module, in preparation for testing once the
          silicon tuner is available. The Buyer prototype testing design will be
          completed and available to receive the Microtune silicon tuner product
          within one week of delivery of the prototype tuner product to Buyer.
          Seller will provide a delivery schedule of the prototype tuner product
          a minimum of ***** in advance of the delivery date.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

<PAGE>

      1.6  Buyer and Seller agree to mutually develop and execute a prototype
           evaluation schedule that coincides with first availability of the
           silicon tuner.

      1.7  Seller agrees to make early samples of the silicon tuner product
           available to Buyer for evaluation and feedback and Buyer agrees to
           evaluate the Microtune silicon tuner and provide timely feedback to
           Seller.

      1.8  Seller agrees to incorporate pertinent performance enhancements and
           anomaly fixes into the Silicon Tuner per Buyer's input.

      1.9  Buyer agrees to identify potential programs for the Microtune silicon
           tuner solution and make best efforts to incorporate it into its
           product line under the condition that the Silicon Tuner solution
           meets GI's performance, cost, and power consumption goals.

2.0  Payment of NRE. In consideration for the resources and information made
     available to Seller hereunder, Seller agrees to pay Buyer the sum of
     ***** (the "NRE Amount"), payable in the following manner:

      ***** upon Seller's delivery of the *****;

      ***** upon completion of ***** of the Seller's silicon tuner with formal
      feedback to Seller;

      ***** upon completion of ***** incorporating the Seller's silicon tuner;

      ***** upon completion of ***** of the Seller's silicon tuner in Buyer's
      product (DOCSIS certification or other); and

      ***** upon first Buyer order for Seller's silicon tuner product in
      commercial quantities, but in no event less than *****.

   All payments of NRE shall be made within sixty (60) days after the date of
   Buyer's invoice for such payments and approval by Seller of completion of the
   respective milestones.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the date first written above.

Buyer:                                  Seller:

GENERAL INSTRUMENT CORPORATION          MICROTUNE, INC.

By:                                     By:
    --------------------------------        ----------------------------------
Name:  Keith C. Jones                   Name:  Douglas J. Bartek
Title: V.P. & Director, Supply Mgmt.    Title: CEO and Chairman
Date:                                   Date:
      ------------------------------          --------------------------------
<PAGE>

                                   EXHIBIT C

                          PRODUCTS, PRICES, LEAD TIMES
<TABLE>
<CAPTION>

                                       Q2-CY00    Q3-CY00    Q4-CY00    Q1-CY01    Q2-CY01    Q3-CY01    Q4-CY01
                                      ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                   <C>        <C>        <C>        <C>        <C>        <C>        <C>
CABLE MODEM TUNER UNIT
PURCHASES (Note 1)
*****                                 *****      *****      *****      *****      *****          -            -
*****                                                       *****      *****      *****      *****        *****
*****                                                                             *****      *****        *****
*****                                                                                        *****        *****
Total Units                           *****      *****      *****      *****      *****      *****        *****

CABLE MODEM TUNER UNIT PRICES
*****                                 *****      *****      *****      *****      *****
*****                                                       *****      *****      *****      *****        *****
*****                                                                             *****      *****        *****
*****                                                                                        *****        *****
Average Unit Price                    *****      *****      *****      *****      *****      *****        *****

CABLE MODEM TUNER EST. LEAD
TIME (WKS)
*****                                 *****      *****      *****      *****      *****      *****        *****
*****                                 *****      *****      *****      *****      *****      *****        *****
*****                                                                             *****      *****        *****
*****                                                                                        *****        *****
</TABLE>

Note 1  The quantities set forth in
this table are estimates only and
do not create any obligation on
the part of Buyer to purchase the
quantities shown.
Note 2:  Pricing is an estimate based on current silicon tuner module projected
costs
Note 3:  Pricing is an estimate based upon current silicon tuner development
plans and die size and cost estimates

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

                                   EXHIBIT D

                 BUYER'S DIVISIONS, SUBSIDIARIES AND AFFILIATES
                       PERMITTED TO ORDER UNDER AGREEMENT

                                       2
<PAGE>

                                   EXHIBIT E

                               TERMS OF PURCHASE

1.   Order / Acceptance.

     (a) Each order ("Order") is an offer by General Instrument Corporation
("Buyer") to purchase the goods and/or services ("Products") identified by
Buyer, pursuant to the terms and conditions in the Manufacture and Supply
Agreement (the "Agreement") these terms and conditions and any other provisions
specifically incorporated by reference by Buyer on the face thereof. Each Order
shall be in the form of a written or electronic communication and shall contain
the following information unless otherwise specified in the Agreement:

       (i)  A description of the Product;
       (ii)  The quantity of the Product;
       (iii) The delivery date;
       (iv) The location to which the Products are to be shipped;
       (v) The location to which invoices shall be sent for payment; and
       (vi) Transportation instructions.

(b)  Seller shall accept and acknowledge each Order it is obligated to accept
under the provisions of this Agreement within five (5) Business Days of receipt
by Seller of such Order without conditioning such acceptance upon the acceptance
by Buyer of any terms inconsistent with or in addition to those set forth in the
Agreement and these terms and conditions. Seller shall respond to all other
Orders within five (5) Business Days of Seller's receipt of such other Order.
Acceptance of the Order by Seller may be made by signing and returning the
attached acknowledgment copy of the Order, by other express acceptance, or by
attempted part or full performance. Acceptance of the Order is limited to these
terms and conditions and such referenced provisions, and Buyer hereby rejects
any other terms, conditions and provisions. If Seller uses its own form to
accept the Order, it is understood that such use is for Seller's convenience
only and that Buyer hereby refuses to assent to any terms or conditions
contained therein, conflicting with or in addition to those contained herein,
and such conflicting and/or additional terms and conditions shall be of no force
or effect. The failure of Seller to acknowledge or accept any Order which it is
obligated to accept under the provisions of this Agreement shall have no effect
on Buyer's obligation to purchase and Seller's obligation to sell the Products
covered by such Order.

     (c) All quotations, purchase orders, acknowledgments and invoices issued
pursuant to the Agreement are issued for convenience of the Parties only and
shall be subject to the provisions of the Agreement and the Exhibits thereto.
The parties acknowledge that the preprinted provisions on the reverse side of
any such quotation, purchase order, release, acknowledgment or invoice shall be
deemed deleted. No modification to the Agreement, the Exhibits or any Order
shall be valid without the prior written consent of the Purchase Agreement
Coordinators of Seller and Buyer.

     (d) Termination or expiration of the Agreement shall not affect Orders
previously issued hereunder. In addition, the Agreement shall apply to Orders
issued by Buyer to Seller and accepted by Seller before the date of the
Agreement, and for which deliveries are scheduled after the date hereof. Such
Orders are hereby amended to reflect the prices contained in Exhibit C.  The
right to purchase granted hereunder shall apply only with respect to Products
actually ordered by Buyer prior to the termination date of the Agreement and
requested for delivery by Buyer not later than ***** months after said
termination date.

2.   Prices and Payment Terms

     (a) All prices are FOB Seller's place of manufacture, which for RF tuners
is currently in Manila, The Philippines  or such other location agreed to by
both Seller and Buyer.  Risk of loss and title shall pass to Buyer upon Buyer's
receipt of conforming goods at Seller's place of manufacture.  All prices are to
be paid in U.S. dollars.  At the time Seller ships any Products under this
Agreement it shall send to Buyer by overnight delivery service, telefax or
electronic mail a notice of such shipment.

     (b) Seller's prices include packaging, and all sales, use and excise taxes
levied upon, or measured by the sale, price or use of the Products prior to
delivery to the Buyer.  Seller assumes sole responsibility for payment of all
such taxes with respect to its sale of the Products to Buyer.  If Buyer is
purchasing the Products for resale and claiming a tax exemption in connection
therewith, Buyer shall furnish Seller with an applicable resale certificate.
Buyer shall be responsible for all taxes not included in the selling price and
for all import duties in connection with the shipment of the Products purchased
by Buyer.

     (c) Seller shall, subject to any relevant obligation of confidentiality,
provide to Buyer information and documentation reasonably requested by Buyer
with respect to the cost of items of Inventory and Special Inventory.Buyer shall
also review the test requirements for the Products. Seller shall provide
reasonable assurances to Buyer that *****

     (d) Seller shall maintain, for a period of not less than five (5) years
after the date of sale, or for such longer period as required by applicable law,
such records as

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

are necessary to permit each Product identified with a lot number by Seller and
sold by Buyer to be traced by lot number and customer account. Buyer shall have
the right to audit such records periodically, either by itself or through a
designated agent acceptable to Buyer, during normal business hours following at
least seventy-two (72) hours advance notification, to verify compliance with
this Section.

(e)  The Parties agree to cooperate in good faith to implement a product cost
reduction program involving new technologies, component cost reduction,
productivity, quality and reliability improvements, and manufacturing processes.
Buyer shall provide Seller with reasonable assistance in the selection of raw
materials, components and manufacturing processes.

     Any cost savings which are achieved by Seller as a result of implementing
cost reductions proposed by Buyer shall reduce the purchase price of the
Products by an amount up to *****

(f)  Seller and Buyer shall cooperate in identifying selected components used in
the Products for potential cost reductions. Information to be shared will
include the manufacturer's or supplier's part number and, when possible, the
purchase price. If Buyer is able to obtain for Seller a supply of any components
utilized by Seller in the Products of comparable quality for a lower price than
the price then being paid by Seller for such component, and upon other terms
acceptable to Seller (which terms shall be deemed acceptable if substantially
similar to the terms provided by Seller's existing supplier of such components),
the price of any Product in which such component is used shall be reduced by an
amount up to the amount of the decrease in the price of the component to Seller,
but only to the extent that there is no decrease in Seller's gross profit margin
for such affected Product.

3.   Manufacturing of Products

     (a) Buyer may, from time to time, request changes to the Specifications.
Seller shall use commercially reasonable efforts to accommodate the requested
changes.  If changes result in a change in the cost or in the time required to
manufacture such Products, an adjustment to the prices and/or lead times (if
any) listed on Exhibit C will be made.  Any adjustment to prices or lead times
shall be in writing.  No changes shall be implemented and become a part of the
Agreement until ninety (90) days following Seller's and Buyer's mutual agreement
of the modifications and price changes, if any.

     (b) Seller shall consult with Buyer no less than once each calendar quarter
to perform a thorough review of Seller's quality and delivery performance under
the Agreement. Buyer shall provide Seller, on a bi-annual basis, a business
metric review consisting of a review of Seller's technology, quality, cost and
service metrics. The criteria on which these business metrics are based shall be
at the discretion of Buyer to facilitate continuous performance enhancement. The
locations of both business and metrics review meetings shall be held at sites
alternately selected by Seller and Buyer and mutually agreed upon.

4.   Packing, Transportation and Risk of Loss.

Seller shall mark, pack, package, crate, transport, ship and store all Products
to ensure (i) delivery of the goods to their ultimate destination in safe
condition, (ii) compliance with all requirements of the carrier and destination
authorities, (iii) compliance with any reasonable special instructions of Buyer,
and (iv) the ***** transportation costs consistent with the above.  All
invoices, shipping documents, exterior packaging and correspondence related
thereto shall indicate the applicable Order number and include suitable markings
and information to reference the covered Products.   All shipments shall be
accompanied by the appropriate shipping documents, including without limitation,
applicable customs and export documentation and a packing list indicating the
Order number, description of the goods, model numbers and total quantity by
"lot" for such goods.  Buyer's count and/or weights shall be conclusive on
shipments not accompanied by a conforming packing list.  Seller shall bear all
excess transportation and other charges and costs resulting from any failure to
follow Buyer's instructions hereunder. Notwithstanding the above, overshipments
to allow for reasonable efficiencies in packing and shipping will be allowed.

5.   Inspection - Nonconformity.

     (a)  Buyer may inspect the Products upon receipt and/or at any time prior
thereto, provided that such inspection is completed within thirty (30) days of
receipt of the Products at Buyer's facility.  Buyer shall, however, be under no
duty to inspect the Products prior to Buyer's use or resale of the Products.
Buyer reserves the right to refuse to accept Products which do not conform with
the requirements of an Order (including, without limitation, delivery schedule
and shipping instructions) or the Specifications for the Products. Neither
receipt, retention, use, resale, nor payment of or for the same shall be
construed to constitute an acceptance of any Product not in compliance with the
terms of Buyer's Order or the Specifications, or construed to constitute a
waiver of any obligations of Seller with respect to its warranty relating to
such Product. Buyer may reject a lot or group of Products if five percent (5%)
defective Products are discovered and in such case, upon Seller's approval, the
expenses of Buyer in sorting and testing the Products in order to find defective
units shall be reimbursed to Buyer by Seller.  Buyer shall promptly return to
Seller for repair or replacement, nonconforming Products, including Products
becoming nonconforming due to latent material or workmanship defects not
discovered during any inspection, testing and/or acceptance.  Products
containing latent material or workmanship defects shall be deemed rejected as of
the time of delivery in the same manner as Products found defective at the time
of incoming inspection. Seller shall promptly and without expense to Buyer
replace or correct defects in any nonconforming Products. Seller shall bear the
risk, and all costs and expenses, including, without limitation, storage,
transportation, shipping, recalling, repacking, reshipping, and the like,
associated with repair and/or replacement of nonconforming Products. Buyer shall
bear all of the risk, and all costs and expenses, associated with Products that
have been returned to Seller for which there is no defect found.     Within
fifteen (15) days after the end of each calendar quarter during the term of the
Agreement, Buyer shall provide Seller with its calculation of the Field
Rejection Rate as of the end of such calendar quarter.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       2
<PAGE>

     (b) Seller has the right to retest any Products returned by Buyer under
this Section 5, and Buyer has a right to witness any such retest.  Seller agrees
to promptly and without expense to Buyer, replace or correct Defects in any
nonconforming Products. Seller shall bear the risk, and all costs and expenses
including without limitation, storage, transportation, shipping, recalling,
repacking, reshipping and the like, associated with such repair and replacement.
Buyer shall bear all of the risk, and all costs and expenses, associated with
Products that have been returned to Seller for which there is no Defect found.

     (c) Seller agrees to deliver conforming Products ordered within five (5)
calendar days of the scheduled delivery dates contained in the Orders
(including, if so scheduled, weekly scheduled deliveries).  Whenever Seller has
reason to believe performance will not be made strictly in accordance with
Buyer's schedule for any reason whatsoever, Seller shall immediately notify
Buyer by telephone of the same, to be followed promptly by written notification
to Buyer stating the causes for the anticipated delay. If Seller fails to
deliver to Buyer any conforming Product within the time period required under
any Order (provided that any lead time for such Product has expired and further
provided that such delay has not been caused by Buyer), Buyer shall have the
right to cancel the Order for such Product. In addition, in the event that
Seller is not able to meet a delivery date for any conforming Products which is
within the time period requested (provided that such time period is within the
lead times established under the Agreement and further provided that such delay
has not been caused by Buyer), Buyer may instruct Seller with regard to Buyer's
preferred method of shipment, the cost of which shall be borne entirely by
Seller.

     (d) Buyer reserves the right to reject Products delivered more than five
(5) Business Days in advance of the scheduled delivery date.  If Buyer retains
such Products it will hold Seller's invoice until the date it would ordinarily
be due if delivery had been made in accordance with the scheduled delivery date.

     (e) Except for reasonable efficiencies in packing and shipping, Seller will
not make partial shipments of units of Products covered by an Order without the
prior written consent of Buyer.

     (f) Buyer expects ***** acceptable parts, manufactured and tested to the
Specifications, and will not be bound by any Seller procedure designating any
other acceptable quality level.

     (i) In the event that the Field Rejection Rate of any Product at any time
is greater than *****, beginning on the date that Seller receives written
notification from Buyer of the Field Rejection Rate excess, the purchase price
for any units of such Product to be delivered after the notification date shall
be reduced by an amount equal to ***** of such purchase price until such time as
the Field Rejection Rate decreases to less than *****.

     (j) Subject to Buyer's review and reasonable approval, Seller shall
establish and maintain quality assurance procedures to produce Products with
performance and reliability characteristics meeting or exceeding those required
by the Agreement and shall provide and maintain a quality control, inspection
and test system for all Products in accordance with industry standards. Upon the
reasonable request by Buyer, Seller shall provide written certification of such
compliance with such program and standards. Seller represents that all
facilities used to manufacture Products under this Agreement are ISO 9002
certified and the parties agree that achievement of ISO 9002 certification meets
the quality control, inspection and test system requirements for all Products
hereunder.  Prior to shipping any Products from Seller's Facility, and upon the
request of Buyer, Seller will issue to Buyer a certificate as to the compliance
of Products with applicable Specifications (a "Certificate of Compliance").
Within twenty-four (24) hours following the receipt of such Certificate of
Compliance, Buyer shall have the right to instruct Seller to forego shipping
such Products based on unsatisfactory test results for such Products.  If Seller
fails to provide Buyer with a Certificate of Compliance, after Buyer request,
for any Product by at least twenty-four (24) hours prior to shipment, Buyer
shall have the right to reject such Product at any time as nonconforming.  Buyer
may inspect Products at Seller's Facility and Seller shall provide all
reasonable facilities and assistance for such inspection, provided, Buyer gives
Seller at least seventy two (72) hours advance notice and such inspection does
not interrupt the standard course of Seller's business  To the extent that test
procedures or quality control requirements are included in Exhibit I, such test
procedures and requirements shall be in addition to the obligations described in
this Section.  Seller shall replace all Products that do not pass any test
procedures described herein.  Complete and accurate records relating to such
tests shall be maintained by Seller at all times during the term of the
Agreement and for a period of three years thereafter. Buyer shall have the right
to inspect all testing records maintained by Seller during normal hours and
after Buyer gives Seller at least seventy-two (72) hours notification.

     (m) This Section (or any action taken by Buyer hereunder) shall not be
construed or interpreted to mean that Buyer has waived any rights it may have
under any provision of the Agreement (including the Exhibits hereto), or
otherwise, in connection with late deliveries of Products by Seller.

6.   Performance and Warranty.

     (a) The performance dates indicated on the Order shall be deemed to be of
the essence of this contract, and failure to adhere to such dates (which in the
case of the  delivery of Products shall be within five (5) calendar days of such
dates) shall be a breach hereof.  Products manufactured or delivered, inventory
purchased, or commitments or production arrangements made, in excess of the
amount, or in advance of the time reasonably necessary to meet Buyer's schedule
or Buyer's express releases are entirely at Seller's risk, and may be rejected
and/or returned to Seller at Seller's expense.  When Seller has reason to
believe performance may not be made strictly in accordance with Buyer's schedule
or releases, Seller shall immediately notify Buyer by telephone, with written
confirmation, providing the details of such potential failure, and if so
requested by Buyer, Seller shall use commercially reasonable efforts *****.

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

                                       3
<PAGE>

     (b) Seller warrants to Buyer and to Buyer's customers that for a period of
one (1) year from the date of the receipt of each Product at Buyer's facility
that such Product will conform to all applicable Specifications, and will be
free from defects, material and workmanship. This warranty does not apply to (a)
materials consigned or supplied by Buyer to Seller; (b) defects resulting from
Buyer's Specifications or the design of the Products; or (c) Products that have
been abused, damaged, altered or misused by any person or entity after they have
been received by Buyer at Buyer's facility.  With respect to first articles,
prototypes, pre-production units, test units or other similar Products, Seller
makes no representations or warranties whatsoever.  Notwithstanding anything
else in the Agreement, Seller assumes no liability for or obligation related to
the performance, accuracy, specifications, failure to meet specifications or
defects of or due to tooling, designs or instructions produced or supplied by
Buyer and Buyer shall be liable for costs or expenses incurred by Seller related
thereto.

     (c) Seller's shall replace or repair, at Seller's option, defective or
nonconforming Products.

     (d) The warranties provided in this Section 6 are applicable only if Seller
receives written notice of a breach of warranty mailed to its office within
sixty (60) days after the end of the applicable warranty period.  The warranties
provided herein shall not apply to Products or parts thereof that have been
subjected to misuse, neglect, accident, damage in transit, abuse or unusual
hazard.

     (e) Failure by Seller to repair or replace a defective Product within
fifteen (15) Business Days after it has been received and verified by Seller
shall be considered a default.

     (f) Seller shall pay all transportation costs for the return of the
Products to Seller and for the shipment of the repaired or replacement Products
to Buyer and shall bear all risk of loss or damage to such Products while in
transit. Seller shall repair or replace any Products returned to it for warranty
repair within fifteen (15) Business Days after Seller receives the Product, and
will provide Buyer with a failure analysis report and a corrective action plan.
In the event that any Product is returned for warranty repair more than two (2)
times based on similar reasons relating to its functionality or usability,
Seller shall immediately provide Buyer or Buyer's customers with a new,
conforming replacement Product or if so elected by Buyer or Buyer's customers,
provide a refund of the purchase price of such Product.  In the event that any
Product is returned for warranty repair and such Product is not repaired within
fifteen (15) days from the date of receipt by Seller of such Product, Seller
shall immediately provide Buyer or Buyer's customers with a new, conforming
replacement Product or if so elected by Buyer or Buyer's customers, provide a
refund of the purchase price of such product.  Any repaired Product shall be
warranted as set forth in this Section 6 for a period equal to the greater of
(i) the balance of the applicable warranty period relating to such Product or
(ii) ninety (90) days after it is received by Buyer's customer. Any replacement
Product shall be warranted for the applicable warranty period set forth in this
Section 6 relating to a new Product.  If any Product returned for warranty
repair is not covered by the terms of the warranty applicable to such Product or
does not have a Defect, the actual shipping costs incurred shall be paid by
Buyer to Seller.

     (g) In addition to "in-warranty" repairs under this Section 6, Seller
agrees to provide repair service for any Product ordered during the term of the
Agreement for a period of one (1) year after the termination of the warranty
period applicable to such Product. Seller shall provide such out-of-warranty
repairs at the repair charges then generally charged by Seller for such repairs
or, if such repairs are not then being performed by Seller, at reasonable rates.

     Defective Products out-of-warranty may be returned at Buyer's expense to
Seller for repair or replacement. If any Product returned to Seller for repair
is reasonably determined to be irreparable, Seller shall promptly notify Buyer.
Seller shall then, at Buyer's option, sell to Buyer a replacement Product, if
available, at the prices set forth in the Agreement or, if the Agreement is then
terminated, at Seller's then current price for such Product.

     Seller shall complete repairs and ship the repaired Product or, as
authorized by Buyer in an equipment repair order, a replacement Product within
Seller's then standard lead time for the replacement Product. Buyer shall bear
the risk of loss or damage during transit of the Product to and from the Seller
and shall prepay and bear the cost of transportation charges for shipment to and
from the Seller of the Product to be repaired or replaced. If Seller reasonably
determines that the Product returned is not defective, Seller shall promptly
advise Buyer in writing of such determination. In such case, Seller shall return
the Product to Buyer, at Buyer's expense, in its "as received" condition.

     Any out-of-warranty repair performed by Seller shall be warranted as set
forth in this Section 6 for a period of one (1) year after the repaired Product
is returned to the Buyer.  Any replacement Products shall be warranted for the
applicable warranty period set forth in this Section 6 relating to a new Product

  (h) The warranties in this Section shall run to Buyer, its successors and
assigns, and shall not be the exclusive remedies of such parties.

7.   Representations and Warranties

Seller and Buyer hereby represent and warrant as follows:

     (a) To their knowledge, Seller and Buyer respectively represent and warrant
that no impediment exists to their entering into the Agreement and they have not
made any agreement with any third party which will interfere with their
performance under the Agreement.

     (b) To their knowledge, Seller and Buyer respectively represent and warrant
that no information contained in any proposal, quotation or other document
submitted by Seller or Buyer to the other in connection with the transactions
contemplated by the Agreement is incorrect or misleading.

     (c) Seller's performance under the Agreement, as well as all Products
provided hereunder, will

                                       4
<PAGE>

comply with all applicable international, national, federal, state and local
laws and ordinances, and all orders, rules, regulations and requirements
thereunder. All Products will be marked, as required, to show compliance with
the laws of any country in which such Products will be used, sold or leased by
Buyer.

8.   Indemnity.

     (a) Seller shall indemnify, defend, and hold harmless Buyer and Buyer's,
affiliates, directors, officers, employees, agents, other representatives and
customers from all demands, claims, actions, causes of action, proceedings,
assessments, losses, damages, liabilities, settlements, judgments, fines,
penalties, interest, costs and expenses (including reasonable fees and
disbursements of counsel) of every kind based upon (i) personal injury, death,
or property damage to the extent any of the foregoing is proximately caused
either by a  Defect in material or workmanship of such Product or by the
negligent or willful acts or omissions of Seller or its officers, employees,
subcontractors or agents, or (ii) strict liability in tort or products liability
of any kind in connection with any Product to the extent any of the foregoing is
proximately caused either by a  Defect in material or workmanship or by the
negligent or willful acts or omissions of Seller or its officers, employees,
subcontractors or agents. The foregoing indemnity, to the extent permitted by
law, shall apply in the case of all claims that arise from the negligence,
misconduct or other fault of Seller, provided, however, that if a claim is the
result of joint negligence, joint misconduct, or joint fault of Seller and
Buyer, the amount of the claim for which Buyer is entitled to indemnification
shall be limited to that portion of such claim that is attributable to the
negligence, misconduct, or other fault of Seller. The obligations of Seller
under this paragraph are in addition to Seller's obligation to provide insurance
and shall not be limited by any limitation on the amount of type of damages,
compensation or benefits payable by Seller under any workers compensation acts
or similar employee benefit act.

     (b)  Buyer shall indemnify, defend, and hold harmless Seller and Seller's
affiliates, directors, officers, employees, contractors, agents and other
representatives from all demands, claims, actions, causes of action,
proceedings, assessments, losses, damages, liabilities, settlements, judgments,
fines, penalties, interest, costs and expenses (including reasonable fees and
disbursements of counsel) of every kind based upon (i) personal injury, death,
or damage to tangible personal property to the extent any of the foregoing is
caused by a defect in the designs and/or Specifications provided by Buyer for
the Product, or (ii) strict liability in tort or products liability of any kind
in connection with any Product to the extent any of the foregoing is caused by a
defect in the designs and/or Specifications provided by Buyer for the Product.
If a claim is the result of joint negligence, joint misconduct, or joint fault
of Buyer and Seller, the amount of the claim for which Seller is entitled to
indemnification shall be limited to that portion of such claim that is
attributable to the negligence, misconduct, or other fault of Buyer. The
obligations of Buyer under this paragraph are in addition to Buyer's insurance
and shall not be limited by any limitation on the amount of type of damages,
compensation or benefits payable by Buyer under any workers compensation acts or
similar employee benefit act.

     (c) A party entitled to indemnification pursuant to Section 8(a) or 8(b)
(the "Indemnitee") shall promptly notify the other party (the "Indemnitor") in
writing of any suits, claims or demands covered by this indemnity. Promptly
after receipt of such notice, the Indemnitor shall assume the defense of such
claim with counsel reasonably satisfactory to the Indemnitee. If the Indemnitor
fails, within a reasonable time after receipt of such notice, to assume the
defense with counsel reasonably satisfactory to the Indemnitee or, if in the
reasonable judgment of the Indemnitee, a direct or indirect conflict of interest
exists between the parties with respect to the claim, the Indemnitee shall have
the right to undertake the defense, compromise and settlement of such claim for
the account and at the expense of the Indemnitor. Notwithstanding the foregoing,
if the Indemnitee in its sole judgment so elects, the Indemnitee may also
participate in the defense of such action by employing counsel at its expense,
without waiving the Indemnitor's obligation to indemnify and defend. The
Indemnitor shall not compromise any claim or consent to the entry of any
judgment without an unconditional release of all liability of the Indemnitee to
each claimant or plaintiff.

     (d) Seller shall indemnify, defend, and hold harmless Buyer and Buyer's
customers affiliates, directors, officers, employees, and , agents from all
demands, claims, actions, causes of action, proceedings, assessments, losses,
damages, liabilities, settlements, judgments, fines, penalties, interest, costs
and expenses (including fees and disbursements of counsel) arising from or
relating to any actual or alleged infringement or misappropriation of any
patent, trademark, copyright, trade secret or any actual or alleged violation of
any other intellectual property rights arising from or in connection with the
manufacture of the Products, except to the extent that such infringement exists
solely as a result of use by Seller of the  designs and/or Specifications
provided by Buyer for the Product and such infringement would not exist but for
the use by Seller of the designs and/or Specifications provided by Buyer for the
Product.

     (e) In the event of any allegation of infringement of the type described in
Section 8(d), or a claim or suit based thereon (the "Allegation"), the
indemnified party shall promptly notify Seller of such Allegation in writing.
Seller shall assume the defense of such claim with counsel reasonably
satisfactory to Buyer. If Seller fails, within a reasonable time after receipt
of such notice, to assume the defense with counsel reasonably satisfactory to
Buyer or, if in the reasonable judgment of Buyer a direct or indirect conflict
of interest exists between the parties with respect to the claim, Buyer shall
have the right to undertake the defense, compromise and settlement of such claim
for the account and at the expense of the Seller. Notwithstanding the foregoing,
if Buyer in its sole judgment so elects, Buyer may also participate in the
defense of such actions by employing counsel at its expense, without waiving
Seller's obligation to indemnify and defend. Seller shall not compromise any
claim or consent to the entry of any judgment without an unconditional release
of all liability of Buyer to each claimant or plaintiff.

     (f) In the event that the use of any Product is enjoined, Seller shall at
its option, do one or more of the following:

                                       5
<PAGE>

          (i)   procure the right to continue using the infringing Product at no
cost to Buyer or its customers; or

          (ii) replace the infringing Product with a non-infringing product or
modify the infringing Product so that it is no longer infringing; provided that
                                                                  --------
the replacement product or modified Product complies with the Specifications in
all material respects.

     If Seller is unable to accomplish (i) or (ii) within ninety (90) days after
the issuance of such injunction, Buyer may, in addition to all other rights and
remedies available to it, require Seller to refund the entire purchase price for
the infringing Product and to pay to Buyer any amounts Buyer is required to pay
to its customers as a result of the injunction], including, without limitation,
any refund of the purchase price of Buyer's products rendered unusable as a
result of the injunction.

     (g) Notwithstanding any other provision of this Section to the contrary,
Seller shall have no liability for any Allegation or portion of an Allegation
based solely upon either (a) the combination of non-infringing Products with
other products, unless Seller sold, manufactured, or recommended such other
products or was aware of the intended combination with such other products or
such combination is necessary for the intended use of the Products or (b) the
modification of the Products after they are delivered to Buyer unless Seller
makes or recommends such modification, the modification constitutes normal
repair or replacement in accordance with Seller's repair procedures, or the
modification is the result of the implementation of Seller provided options and
enhancements for the Products.

     (h) Buyer  shall indemnify, defend, and hold harmless Seller and Seller's
directors, officers, employees, and agents from all demands, claims, actions,
causes of action, proceedings, assessments, losses, damages, liabilities,
settlements, judgments, fines, penalties, interest, costs and expenses
(including reasonable fees and disbursements of counsel) arising from or
relating to any actual or alleged infringement or misappropriation of any
patent, trademark, copyright, trade secret or any actual or alleged violation of
any other intellectual property rights arising from or in connection with the
manufacture of the Products, but only to the extent that such infringement
exists as a result of the authorized use by Seller of designs and/or
Specifications provided by Buyer for the Product and such infringement would not
exist but for the use by Seller of the designs and/or Specifications provided by
Buyer for the Product or as a result of any modifications by Buyer to the
Products after delivery to Buyer by Seller hereunder. In the event of any
Allegation of infringement of the type described in this Section 8(h) or a claim
or suit based thereon, the indemnified party shall promptly notify Buyer of such
Allegation in writing. Buyer shall assume the defense of such claim with counsel
reasonably satisfactory to Seller. If Buyer fails, within a reasonable time
after receipt of such notice, to assume the defense with counsel reasonably
satisfactory to Seller, or, if in the reasonable judgment of Seller a direct or
indirect conflict of interest exists between the parties with respect to the
claim, Seller shall have the right to undertake the defense, compromise and
settlement of such claim for the account and at the expense of the Buyer.
Notwithstanding the foregoing, if Seller in its sole judgment so elects, Seller
may also participate in the defense of such actions by employing counsel at its
expense, without waiving Buyer's obligation to indemnify and defend. Buyer shall
not compromise any claim or consent to the entry of any judgment without an
unconditional release of all liability of Seller to each claimant or plaintiff.

10.  Insurance.

     Seller shall maintain during the term of the Agreement adequate levels of
insurance, customary in the industry, such as workers compensation,  employer's
liability insurance, comprehensive automobile liability insurance, comprehensive
general liability insurance, and comprehensive general liability.  Buyer has a
right to review Seller's insurance policies with Seller and make recommendations
regarding the levels of insurance carried by Seller.

11.  General Provisions

     (a) Neither party may assign its rights, nor secure the assumption of its
obligations, nor subcontract or delegate performance, under the Agreement,
without the prior written consent of the other not to be unreasonably withheld;
provided, however, that such consent shall not be required for a transfer or
assignment of this Agreement to a parent or subsidiary of such party as of the
date of this Agreement or a subsequent parent or subsidiary of such party upon
the reincorporation or restructuring of the party which does not change the
ultimate ownership of the party.

     (b) Other than as provided herein, the Agreement does not create any
exclusive arrangement between the parties, and either party hereto may meet,
exchange information, enter into agreements and conduct business relationships
of any kind with third parties, to the exclusion of the other party.

     (c) Seller and Buyer are each independent contractors.  Nothing in the
Agreement shall constitute the parties as partners, joint ventures, co-owners or
otherwise as participants in a joint or common undertaking.  Neither party shall
be considered an agent or legal representative of the other for any purpose, and
neither party nor any of their respective directors, officers, agents or
employees shall be, or be considered, an agent or employee of the other.
Neither Seller nor Buyer has authority to assume or create any obligation or
responsibility on behalf of the other or in the other's name, and neither Seller
nor Buyer will attempt to do so.

     (d) Seller shall, at Seller's expense (i) promptly furnish to Buyer such
assurances, product markings, certifications and information as Buyer may
request with respect to any local or regional origin content requirements for
the Products  (Seller will further coordinate the selection of its suppliers in
compliance therewith).  Seller shall comply with all laws, regulations,
executive orders and policies applicable to it by any jurisdiction, including
without limitation, those related to workplace conditions and environmental
regulation, and shall obtain all permits needed to complete this transaction
under the laws of the country from which the shipment is made, including among
other things, any required export permits. It shall be a breach of the Order if
any gratuities are offered or given to

                                       6
<PAGE>

any officer, agent, employee or representative of Buyer or to the extent
violative of any law, to any representative of any government or political
party, for the purpose of securing favorable treatment with respect to the
awarding, performance or amendment of any contract. In the event Seller will be
performing services hereunder at Buyer's facility Seller shall maintain adequate
insurance coverage for public liability, personal injury and property damage
(and shall evidence the same at Buyer's request), shall otherwise comply with
all security procedures and other applicable rules affecting the services
provided.

     (e) A party may deduct from any payment due to the other party, or set-off
against any claim by the other, any amount which is due to it for any reason,
including, among other reasons, any charges caused by deviations from the terms,
conditions and provisions of the Order and/or this Agreement.. If any
manufacturer's excise tax, value added tax or other tax measured by selling
price is included in or added to the price of the goods paid by Buyer, then, in
the event all or any part of that tax shall be refunded to Seller, Seller shall
promptly remit such refund in full to Buyer.

     (f) EXCEPT TO THE EXTENT SET FORTH IN SECTION 8 HEREOF OR IN THE NON-
DISCLOSURE AGREEMENT ATTACHED TO THIS AGREEMENT, IN NO EVENT SHALL EITHER PARTY
BE LIABLE TO THE OTHER FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.

     (g) This document and any other documents referenced herein, constitute the
entire agreement between the parties on this subject.  All other prior
representations, negotiations or arrangements on this subject matter are
superseded by these terms and shall not form a basis for interpretation of these
terms.  All amendments to these terms must be agreed to in writing by Buyer and
Seller.  Seller or Buyer may waive performance of any condition, but any waiver
by Buyer or Seller shall not be considered a waiver for succeeding performance.
If any provision of the Agreement or these Terms of Purchase is declared invalid
by any tribunal or legal authority having jurisdiction, the remaining provisions
not so declared invalid shall be enforced to the fullest extent permitted by
law, unless the removal of such invalid part shall have the effect of materially
impairing the Agreement.

     (h) This transaction and all its terms shall be governed and construed in
accordance with the laws of the State of California., without giving effect to
conflicts of law principles, specifically including the provisions of the
California Uniform Commercial Code and excluding the provisions of the
Convention on the International Sale of Goods.

     (i) Each party agrees that it will not export or re-export, directly or
indirectly, any of the other party's Confidential Information or items to any
country for which the United States of America, at the time of export or re-
export, requires an export license or other governmental approval, without first
obtaining such license or approval.

                                       7
<PAGE>

                                   EXHIBIT F

                        PURCHASE AGREEMENT COORDINATORS

          FOR BUYER:

               Motorola, Inc.
               101 Tournament Drive
               Horsham, PA  19044
               Attention:
                         -----------------------
               Phone:  (215)
                            --------------------
               Fax:    (215)
                            --------------------

          FOR SELLER:

               Microtune, Inc.
               2540 East Plano Parkway, Suite 188
               Plano, Texas 75074

               ---------------
               Attention: President
               Phone:(972) 673-1600
               Fax:(972) 673-1602
<PAGE>

                                   EXHIBIT G

                                 SPECIFICATIONS

General Instrument ***** specification *****

General Instrument ***** specification *****

General Instrument specifications to meet the performance of *****

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

                                   EXHIBIT H

                            NON-DISCLOSURE AGREEMENT

Non-Disclosure Agreement dated 13th October 1999

<PAGE>

                                   EXHIBIT I

                               QUALIFICATION PLAN

  The tuner must allow the Buyers product to meet applicable CableLabs DOCSIS
  specifications:

  *****

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

                                   EXHIBIT J

                        THIS PAGE IS INTENTIONALLY BLANK
<PAGE>

                                   EXHIBIT K

           GENERAL INSTRUMENT COMPONENT QUALIFICATION AND CHANGE PLAN

             Qualification and Change Plan, *****

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.SOUTHWESTERN ENERGY COMPANY
                           NON-QUALIFIED STOCK OPTION

                               (Not Transferable)

                THIS CERTIFIES,  that SOUTHWESTERN  ENERGY COMPANY,  an Arkansas
corporation (the "Company"),  has, as of the ____ day of _____, 2000, granted to
________________  (the "Participant"),  a Non-Qualified Stock Option to purchase
______ shares (the  "Optioned  Shares") of the Company's  Common Stock ($.10 par
value)  on the terms  and  conditions  attached  hereto  and made a part  hereof
("Terms").

                This  Non-Qualified  Stock Option is granted  separate and apart
from the  Southwestern  Energy Company 2000 Stock Incentive Plan, and any shares
issued to the  Participant  upon  exercise of this  option  shall be issued from
treasury shares.

                This  Non-Qualified  Stock Option shall be  exercisable  only in
accordance  with  the  provisions  of  this  Certificate  and  the  Terms.  This
Non-Qualified  Stock  Option is not  transferable  except by Will or the laws of
descent and distribution.

                The exercise price of the Optioned  Shares shall be $_______ per
share.

                This Non-Qualified Stock Option shall be exercisable in whole or
in part;  provided,  that no partial exercise shall be for an aggregate exercise
price of less than  $1,000.  The partial  exercise of this  Non-Qualified  Stock
Option  shall not cause  the  expiration,  termination  or  cancellation  of the
remaining portion hereof.

                This Non-Qualified Stock Option shall be exercised by delivering
notice to the Company's principal office, to the attention of its Secretary,  no
less than one  business  day in advance of the  effective  date of the  proposed
exercise.  Such notice shall be accompanied by this  Certificate,  shall specify
the number of Optioned  Shares with  respect to which this  Non-Qualified  Stock
Option is being  exercised and the effective  date of the proposed  exercise and
shall be signed by the Participant.  The Participant may withdraw such notice at
any time  prior  to the  close  of  business  on the  business  day  immediately
preceding the effective date of the proposed exercise.

                Payment for Optioned Shares  purchased upon the exercise of this
Non-Qualified  Stock Option shall be made on the effective date of such exercise
in accordance with the Terms.

                THIS  NON-QUALIFIED  STOCK OPTION SHALL FIRST BECOME EXERCISABLE
WITH RESPECT TO THE FOLLOWING  PERCENTAGE OF THE TOTAL SHARES  SUBJECT HERETO ON
THE FOLLOWING DATES:

<PAGE>

=======================================  =======================================

                                           First Date on Which Such Percentage
     Percentage of Total Shares            of Total Shares Becomes Exercisable
=======================================  =======================================

              33 1/3 %
=======================================  =======================================

              33 1/3 %
=======================================  =======================================

              33 1/3 %
=======================================  =======================================

                THIS NON-QUALIFIED STOCK OPTION SHALL BECOME FULLY VESTED AT THE
EARLIER  OF  ___________,   _____  OR  UPON  PARTICIPANT'S  RETIREMENT  PROVIDED
PARTICIPANT HAS REACHED NORMAL  RETIREMENT AGE (SIXTY-FIVE  (65)), AS DEFINED IN
THE  SOUTHWESTERN  ENERGY  COMPANY  PENSION PLAN.  PROVIDED,  HOWEVER,  UPON THE
OCCURRENCE OF A CHANGE IN CONTROL, IF AND TO THE EXTENT IT STILL IS OUTSTANDING,
THIS NON-QUALIFIED  STOCK OPTION SHALL BECOME FULLY AND IMMEDIATELY  EXERCISABLE
AND SHALL REMAIN  EXERCISABLE UNTIL ITS EXPIRATION,  TERMINATION OR CANCELLATION
PURSUANT TO THE TERMS.

                THIS  NON-QUALIFIED  STOCK  OPTION  SHALL EXPIRE AND BE VOID AND
SHALL NOT BE EXERCISABLE AFTER THE EXPIRATION OF TEN (10) YEARS FROM THE DATE AS
OF WHICH IT WAS GRANTED AND MAY BE EXERCISED ONLY IN THE MANNER  PROVIDED IN THE
TERMS. THIS NON-QUALIFIED STOCK OPTION SHALL BE SUBJECT TO EARLIER  TERMINATION,
EXPIRATION OR CANCELLATION AS PROVIDED IN THE TERMS.

                IN WITNESS  WHEREOF,  the Company has issued this  Non-Qualified
Stock Option  Certificate by its undersigned  duly authorized  officer as of the
____day of _____, 2000.

                                           SOUTHWESTERN ENERGY COMPANY

ATTEST:   (Seal)                           By:_____________________________
                                                   President and Chief
                                                    Executive Officer

By:____________________________
   Executive Vice President and
     Chief Financial Officer

                                              _____________________________
                                                      (Participant)

                                       2
<PAGE>

                            NQO TERMS AND CONDITIONS

1.       Definitions

         As used herein, the following  definitions apply to the terms indicated
below:

                  (a) "Cause" when used in connection  with the termination of a
         Participant's  employment with the Company,  shall mean the termination
         of the  Participant's  employment  by the Company on account of (i) the
         willful  and  continued  failure by the  Participant  to  substantially
         perform the Participant's  duties and obligations  (other than any such
         failure resulting from the Participant's  incapacity due to physical or
         mental illness), after a written demand for substantial performance has
         been   delivered  to  the   Participant   by  the  Company  or  by  the
         Participant's supervisor,  which demand identifies in reasonable detail
         the  manner  in  which  the   Participant   is  believed  to  have  not
         substantially  performed  his or her  duties,  (ii)  the  Participant's
         willful  and  serious   misconduct  which  has  resulted  in  or  could
         reasonably  be expected to result in material  injury to the  business,
         financial   condition  or   reputation   of  the  Company,   (iii)  the
         Participant's  conviction of, or entering of a plea of nolo  contendere
         to, a crime that  constitutes a felony or serious  misdemeanor  or (iv)
         the breach by the Participant of any written covenant or agreement with
         the Company not to disclose any  information  pertaining to the Company
         or not to compete or interfere with the Company.

                  (b) "Change in Control"  shall mean the  occurrence  of any of
         the following:

                      (i) any "person" (as such term  is used in  Sections 13(d)
                  and  14(d)  of  the  Securities  Exchange  Act  of  1934  (the
                  "Exchange   Act"),   an   "Acquiring   Person")   becomes  the
                  "beneficial  owner"  (as such term is  defined  in Rule  13d-3
                  promulgated  under the Exchange Act),  directly or indirectly,
                  of securities of Southwestern  representing 20% or more of the
                  combined  voting  power  of  Southwestern's  then  outstanding
                  securities,  provided,  however,  that any  acquisition by (A)
                  Southwestern  or  any  of its  subsidiaries,  or any  employee
                  benefit plan (or related  trust)  sponsored or  maintained  by
                  Southwestern or any of its subsidiaries or (B) any corporation
                  with respect to which, immediately following such acquisition,
                  more than 60% of, respectively, the then outstanding shares of
                  Common Stock of such corporation and the combined voting power
                  of the then outstanding  voting securities of such corporation
                  entitled to vote  generally  in the  election of  directors is
                  then  beneficially  owned,  directly  or  indirectly,  in  the
                  aggregate by all or  substantially  all of the individuals and
                  entities who were the beneficial owners, respectively,  of the
                  outstanding  Southwestern Common Stock and Southwestern voting
                  securities   immediately   prior   to  such   acquisition   in
                  substantially the same proportion

                                      3
<PAGE>

                  as their ownership,  immediately prior to such acquisition, of
                  the  outstanding  Southwestern  Common Stock and  Southwestern
                  voting securities,  as the case may be, shall not constitute a
                  Change in Control;

                      (ii) consummation  by  Southwestern  of a  reorganization,
                  merger or  consolidation (a "Business  Combination"),  in each
                  case,  with respect to which all or  substantially  all of the
                  individuals and entities who were their respective  beneficial
                  owners  of  the  outstanding  Southwestern  Common  Stock  and
                  Southwestern  voting  securities  immediately  prior  to  such
                  Business  Combination  do not in  the  aggregate,  immediately
                  following  such  Business   Combination,   beneficially   own,
                  directly or indirectly,  more than 60% of,  respectively,  the
                  then  outstanding  shares  of Common  Stock  and the  combined
                  voting  power  of  the  then  outstanding   voting  securities
                  entitled to vote  generally in the election of  directors,  as
                  the  case  may be,  of the  corporation  resulting  from  such
                  Business  Combination in substantially  the same proportion as
                  their ownership immediately prior to such Business Combination
                  of the outstanding  Southwestern Common Stock and Southwestern
                  voting securities, as the case may be;

                      (iii) any individual who is  nominated  by the  Board  for
                  election  to the Board on any date fails to be so elected as a
                  direct or  indirect  result of any  proxy  fight or  contested
                  election for positions on the Board;

                      (iv) a "change in  control" of  Southwestern  of a  nature
                  that would be required to be reported in response to Item 6(e)
                  of  Schedule  14A of  Regulation  14A  promulgated  under  the
                  Exchange Act occurs;

                      (v) (A)  a  complete   liquidation   or   dissolution   of
                  Southwestern  or (B) a sale  or  other  disposition  of all or
                  substantially  all of the assets of both the  Exploration  and
                  Production and the Utility  business  segments of Southwestern
                  other than to a corporation with respect to which, immediately
                  following  such  sale  or  disposition,   more  than  80%  of,
                  respectively,  the then outstanding shares of Common Stock and
                  the  combined  voting  power  of the then  outstanding  voting
                  securities  entitled  to vote  generally  in the  election  of
                  directors is then beneficially owned,  directly or indirectly,
                  in  the  aggregate  by  all  or   substantially   all  of  the
                  individuals  and  entities  who  were the  beneficial  owners,
                  respectively, of the outstanding Southwestern Common Stock and
                  Southwestern voting securities  immediately prior to such sale
                  or disposition in  substantially  the same proportion as their
                  ownership  of the  outstanding  Southwestern  Common Stock and
                  Southwestern   voting   securities,   as  the   case  may  be,
                  immediately prior to such sale or disposition;

                                       4
<PAGE>

                      (vi) other than with  respect to a person who is  employed
                  in the Utility business  segment of Southwestern,  the sale or
                  other  disposition of all or  substantially  all the assets of
                  the Exploration and Production  business segment other than to
                  a  corporation  with respect to which,  immediately  following
                  such sale or disposition, more than 80% of, respectively,  the
                  then  outstanding  shares  of Common  Stock  and the  combined
                  voting  power  of  the  then  outstanding   voting  securities
                  entitled to vote  generally  in the  election of  directors is
                  then  beneficially  owned,  directly  or  indirectly,  in  the
                  aggregate by all or  substantially  all of the individuals and
                  entities who were the beneficial owners, respectively,  of the
                  outstanding  Southwestern Common Stock and Southwestern voting
                  securities  immediately  prior to such sale or  disposition in
                  substantially  the same  proportion as their  ownership of the
                  outstanding  Southwestern Common Stock and Southwestern voting
                  securities, as the case may be, immediately prior to such sale
                  or disposition; or

                      (vii) a  majority  of the  Board  determines  in its  sole
                  and  absolute  discretion  that  there  has been a  Change  in
                  Control  of  Southwestern  or that  there  will be a Change in
                  Control  of  Southwestern   upon  the  occurrence  of  certain
                  specified events and such events occur.

                  (c) "Code" shall mean the Internal Revenue Code of 1986.

                  (d) "Committee"  shall mean the Compensation  Committee of the
         Board of  Directors  or such other  committee as the Board of Directors
         shall  appoint from time to time to  administer  this  agreement and to
         otherwise  exercise and perform the authority and functions assigned to
         the Committee under the terms of the agreement.

                  (e) "Common  Stock" shall mean  Southwestern's  Common  Stock,
         $.10 par value per share,  or any other  security into which the common
         stock shall be changed pursuant to the adjustment provisions of Section
         5 hereto.

                  (f) "Company"  shall   mean   Southwestern  and  each  of  its
         Subsidiaries.

                  (g) "Disability"   shall   mean  a   condition   entitling   a
         Participant   to  benefits  under  the  long-term   disability   policy
         maintained by the Company and applicable to the Participant.

                  (h) "Exchange Act" shall mean the  Securities  Exchange Act of
         1934, as amended.

                  (i) the "Fair  Market  Value"  shall mean,  with  respect to a
         share of Common Stock, as of the applicable date of  determination  (i)
         the closing sales price

                                       5
<PAGE>

         on the immediately preceding business day of a share of Common Stock as
         reported on the principal securities exchange on which shares of Common
         Stock  are  then  listed  or  admitted  to  trading  or  (ii) if not so
         reported,  the  average  of the  closing  bid  and  ask  prices  on the
         immediately   preceding  business  day  as  reported  on  the  National
         Association of Securities  Dealers Automated  Quotation System or (iii)
         if  not  so  reported,  as  furnished  by any  member  of the  National
         Association of Securities Dealers,  Inc. selected by the Committee.  In
         the event  that the price of a share of  Common  Stock  shall not be so
         reported,  the Fair  Market  Value of a share of Common  Stock shall be
         determined by the Committee in its absolute discretion.

                  (j) "Incentive Stock Option" shall mean an Option granted to a
         Participant  which,  at  the  date  of  grant,  is  intended  to  be an
         "incentive  stock option" within the meaning of Section 422 of the Code
         and which is identified  as an Incentive  Stock Option in the agreement
         by which it is evidenced.

                  (k) "Non-Qualified  Stock Option" shall mean an Option granted
         to a Participant which is not an Incentive Stock Option.

                  (l) "Option" shall mean an option to purchase shares of Common
         Stock granted pursuant to Section 3 hereof.

                  (m) "Person"  shall mean a "person,"  as such term  is used in
         sections 13(d) and 14(d) of the Exchange Act.

                  (n) "Securities Act" shall mean the Securities Act of 1933, as
         amended.

                  (o) "Subsidiary"  shall   mean  any  "subsidiary  corporation"
         within the meaning of Section 425(f) of the Code.

2.       Administration

         The  Agreement  shall be  administered  by a Committee  of the Board of
Directors  consisting of two or more persons,  at least two of whom qualify as a
"disinterested  person,"  within the  meaning of Rule  16b-3  promulgated  under
Section 16 of the Exchange Act, and an "outside director," within the meaning of
Treasury  Regulation  Section  1.162-27(e)(2).  The  Committee  shall  have full
authority to administer  this  agreement,  including  authority to interpret and
construe any provision of this  agreement.  Decisions of the Committee  shall be
final and binding on all parties.

         The Committee  may, in its absolute  discretion,  without  amendment to
this  agreement,  accelerate  the date on which  any  Option  granted  hereunder
becomes exercisable or otherwise adjust any of the terms of such Option.

                                       6
<PAGE>

         The Committee shall determine  whether an authorized  leave of absence,
or absence in military or government  service,  shall constitute  termination of
employment.

         No member of the Committee shall be liable for any action, omission, or
determination  relating to the Agreement,  and Southwestern  shall indemnify and
hold harmless  each member of the Committee and each other  director or employee
of the  Company  to whom any duty or power  relating  to the  administration  or
interpretation  of the Agreement has been delegated  against any cost or expense
(including counsel fees) or liability (including any sum paid in settlement of a
claim with the approval of the Committee) arising out of any action, omission or
determination  relating to the Agreement,  unless,  in either case, such action,
omission or determination was taken or made by such member, director or employee
in bad faith and without  reasonable belief that it was in the best interests of
the Company.

3.       Options

         (a) Term and Exercise of Options

         (1) Each Option  shall be  exercisable  in whole or in part;  provided,
that no partial  exercise of an Option shall be for an aggregate  exercise price
of less than  $1,000.  The  partial  exercise  of an Option  shall not cause the
expiration,  termination or cancellation of the remaining portion thereof.  Upon
the partial exercise of an Option, the agreements  evidencing such Option marked
with such  notations as the  Committee  may deem  appropriate  to evidence  such
partial  exercise,  shall  be  returned  to the  Participant  together  with the
delivery of the certificates described in Section 3(a)(4) hereof.

         (2) An Option shall be exercised by delivering  notice to the Company's
principal office, to the attention of its Secretary, no less than three business
days in advance of the  effective  date of the  proposed  exercise.  Such notice
shall  specify  the number of shares of Common  Stock with  respect to which the
Option is being  exercised and the effective  date of the proposed  exercise and
shall be signed by the Participant.  The Participant may withdraw such notice at
any time  prior  to the  close  of  business  on the  business  day  immediately
preceding the  effective  date of the proposed  exercise.  Payment for shares of
Common  Stock  purchased  upon the  exercise  of an Option  shall be made on the
effective  date of such exercise  either (i) in cash, by certified  check,  bank
cashier's check or wire transfer or (ii) through a directed  brokerage  service,
if any is made available to  Participants of the Company or (iii) subject to the
approval of the Committee, in shares of Common Stock that have been owned by the
Participant  for a least six months prior to the effective  date of exercise and
valued at their Fair Market Value on the  effective  date of such  exercise,  or
partly in shares of Common Stock with the balance in cash,  by certified  check,
bank  cashier's  check or wire  transfer.  Any payment in shares of Common Stock
shall  be  effected  by  the  delivery  of  such  shares  to  the  Secretary  of
Southwestern,  duly  endorsed  in blank or  accompanied  by  stock  powers  duly
executed  in blank,  together

                                       7
<PAGE>

with any other documents  and  evidences  as the Secretary of Southwestern shall
require from time to time.

         (3) During the lifetime of the Participant,  each Option granted to the
Participant  shall be exercisable  only by the  Participant.  No Option shall be
assignable or transferable  otherwise than by will or by the laws of descent and
distribution,  nor shall any option be  permitted  to be pledged in any  manner.
Notwithstanding  the  foregoing,  with the prior consent of the  Committee,  any
Option,  including the right to exercise such Option,  may be  transferred  by a
Participant during the Participant's lifetime, but only to: (i) one or more of a
Participant's spouse or natural or adopted lineal descendants;  or (ii) a trust,
partnership, or corporation or other similar entity which is owned solely by one
or more of the Participant's  spouse or natural or adopted lineal descendants or
which  will hold such  options  solely  for the  benefit  of one or more of such
persons.

         (4) Certificates for shares of Common Stock purchased upon the exercise
of an Option shall be issued in the name of the Participant and delivered to the
Participant  as soon as  practicable  following the effective  date on which the
Option is exercised.

         (b) Effect of Termination of Employment

         (1) In the event that the employment of a Participant  with the Company
shall  terminate for any reason other than  Disability,  Retirement,  Cause,  or
death (i)  Options  granted to such  Participant,  to the extent  that they were
vested and exercisable at the time of such termination, shall remain exercisable
until the expiration of ninety days after such  termination,  on which date they
shall expire,  and (ii) Options granted to such Participant,  to the extent that
they were not exercisable at the time of such  termination,  shall expire at the
close of business on the date of such termination;  provided,  however,  that no
Option shall be exercisable after the expiration of its term.

         (2) In the event that the employment of a  articipant  with the Company
shall  terminate on account of the  Disability or Retirement of the  Participant
such Participant  shall be entitled to exercise at any time or from time to time
after such  termination  and until the first  anniversary  of such  termination,
Options  granted to the  Participant  hereunder  to the extent that such Options
were vested and exercisable at the time of such termination  provided,  however,
that no Option shall be exercisable after the expiration of its original term.

         (3) In the event that the employment of a Participant  with the Company
shall terminate on account of the death of the Participant,  such  Participant's
estate  or  beneficiary  under  the  Participant's  will  shall be  entitled  to
exercise,  at any time or from time to time until the first  anniversary of such
termination,  Options  granted to the  Participant  hereunder to the extent that
such  Options  were  exercisable  at the  time  of such  termination;  provided,
however,  that no  Option  shall be  exercisable  after  the  expiration  of its
original term.

                                       8
<PAGE>

Options  that  are  not  exercised  prior  to  the  first  anniversary  of  such
termination shall expire on such anniversary date.

         (4) In the event of the termination of a  Participant's  employment for
Cause,  all outstanding  Options granted to the Participant  shall expire at the
commencement  of business on the date of such  termination;  provided,  however,
that no Participant shall be deemed to have been terminated for Cause during the
two year period following any Change in Control.

         (5) For purposes of this Section  3(b), an Option shall be deemed to be
exercisable  on the date of the  termination  of the employment of a Participant
with the Company to the extent,  if any, it becomes  exercisable by acceleration
by the Committee.

         (c) Acceleration of Exercise Date Upon Change in Control

         Upon the  occurrence  of a  Change  in  Control,  each  Option  granted
hereunder  and  outstanding  at such time  shall  become  fully and  immediately
exercisable and shall remain  exercisable  until its expiration,  termination or
cancellation pursuant to the terms hereof.

4.       Adjustment Upon Changes in Common Stock

         (a) Adjustment upon Certain Events

         In the event of any change in the shares of Common Stock outstanding by
reason of any stock dividend or split, recapitalization,  merger, consolidation,
combination,  spin-off,  reclassification  or  exchange  of  shares  or  similar
corporate  change,  the  number  of  options  granted  the  Participant  may  be
appropriately  adjusted as the Committee shall determine to prevent  enlargement
or  dilution  of the  rights  of  Participants  hereunder  and  the  Committee's
determination hereunder shall be conclusive.

         (b) Outstanding Options - Certain Transactions

         Notwithstanding  any  other  provisions  hereto,  in the event of (i) a
dissolution or liquidation of Southwestern,  (ii) a sale of all or substantially
all of  Southwestern's  assets  or (iii) a  merger  or  consolidation  involving
Southwestern, the Committee shall have the power to:

                  (A) cancel,  effective  immediately prior to the occurrence of
         such event,  each Option  outstanding  immediately  prior to such event
         (whether or not then  exercisable),  and, in full consideration of such
         cancellation,  pay to the Participant an amount in cash, for each share
         of Common  Stock  subject to such Option equal to the excess of (A) the
         value,  as determined by the Committee in its absolute  discretion,  of
         the  property  (including  cash)  received  by the holder of a share of

                                       9
<PAGE>

         Common Stock as a result of such event over (B) the  exercise  price of
         such Option; or

                  (B) provide  for   the  exchange  of each  Option  outstanding
         immediately  prior to such event (whether or not then  exercisable) for
         equivalent  options  covering  securities of the  acquiring  entity (or
         ultimate  parent  thereof)  and,  incident  thereto,  make an equitable
         adjustment as determined by the Committee in the exercise price of such
         option  or,  if  appropriate,   provide  for  a  cash  payment  to  the
         Participant in partial consideration for the exchange of the Option.

         (c) No Other Rights

         Except as expressly provided herein, the Participant shall not have any
rights by reason of any subdivision or  consolidation  of shares of stock of any
class,  the payment of any  dividend,  any increase or decrease in the number of
shares  of  stock  of any  class  or any  dissolution,  liquidation,  merger  or
consolidation  of the  Company  or any other  corporation.  Except as  expressly
provided herein, no issuance by Southwestern of shares of stock of any class, or
securities  convertible into shares of stock of any class,  shall affect, and no
adjustment by reason thereof shall be made with respect to, the number of shares
of Common Stock subject to the exercise price of any Option.

5.       Rights as a Stockholder

         No person  shall have any rights as a  stockholder  with respect to any
shares of Common Stock  covered by or relating to any Option  granted  hereunder
until the date of the  issuance  of a stock  certificate  with  respect  to such
shares.  Except  as  otherwise  expressly  provided  in  Section  4  hereof,  no
adjustment  to any Option  shall be made for  dividends or other rights for with
the record date occurs prior to the date such stock certificate is issued.

6.       No Special Employment Rights; No Right to Options

         Nothing contained herein shall confer upon a Participant any right with
respect to the  continuation  of a  Participant's  employment  by the Company or
interfere in any way with the right of the Company,  subject to the terms of any
separate  employment  agreement to the contrary,  at any time to terminate  such
employment or to increase or decrease the compensation of a Participant from the
rate in existence at the time of the grant hereunder.

         The Participant  shall have no claim or right to receive any additional
Options hereunder.  The Committee's  granting of Options to a Participant at any
time shall neither  require the Committee to grant Options to the Participant at
any time nor  preclude  the  Committee  from  making  subsequent  grants  to the
Participant.

                                       10
<PAGE>

7.       Securities Matters

         (a) Southwestern   shall  be   under  no   obligation   to  effect  the
registration  pursuant to the  Securities  Act of any interests in any shares of
Common Stock to be issued  hereunder or to effect similar  compliance  under any
state laws. Notwithstanding anything herein to the contrary,  Southwestern shall
not be obligated to cause to be issued or delivered any certificates  evidencing
shares of Common Stock pursuant to this agreement unless and until  Southwestern
is advised by its counsel that the issuance and delivery of such certificates is
in compliance with all applicable  laws,  regulations of governmental  authority
and the  requirements  of the New York Stock  Exchange and any other  securities
exchange on which shares of Common Stock are traded.  The Committee may require,
as a condition of the issuance and delivery of certificates evidencing shares of
Common Stock  pursuant to the terms  hereof,  that the  recipient of such shares
make such covenants, agreements and representations,  and that such certificates
bear such legends, as the Committee deems necessary or desirable.

         (b) The  exercise of any Option  granted  hereunder  shall be effective
only at such time as counsel to  Southwestern  shall  have  determined  that the
issuance and delivery of shares of Common Stock  pursuant to such exercise is in
compliance with all applicable laws,  regulations of governmental  authority and
the  requirements  of the New  York  Stock  Exchange  and any  other  securities
exchange on which  shares of Common Stock are traded.  Southwestern  may, in its
sole  discretion,  defer the  effectiveness of any exercise of an Option granted
hereunder or the issuance or transfer of shares of Common Stock pursuant thereto
or ensure compliance under federal or state securities laws.  Southwestern shall
inform the Participant in writing of its decision to defer the  effectiveness of
the  exercise of an Option or the issuance or transfer of shares of Common Stock
granted  hereunder.  During the period that the effectiveness of the exercise of
an Option has been deferred,  the Participant  may, by written notice,  withdraw
such exercise and obtain the refund of any amount paid with respect thereto.

8.       Withholding Taxes

         (a) Cash Remittance

         Whenever  shares of Common  Stock are to be issued upon the exercise of
an Option, Southwestern shall have the right to require the Participant to remit
to Southwestern in cash an amount sufficient to satisfy federal, state and local
withholding tax requirements,  if any,  attributable to such exercise,  prior to
the delivery of any certificate or certificates for such shares.

         (b) Stock Remittance

         Subject to Section  8(d)  hereof at the  election  of the  Participant,
subject to the approval of the Committee,  when shares of Common Stock are to be
issued upon the

                                       11
<PAGE>

exercise  of an Option,  in lieu of the  remittance  required  by  Section  8(a)
hereof,  the Participant may tender to Southwestern a number of shares of Common
Stock  owned by the  Participant  for at least six months  having a Fair  Market
Value at the tender date determined by the Committee to be sufficient to satisfy
the federal, state and local withholding tax requirements,  if any, attributable
to such exercise,  and not greater than  Participant's  estimated total federal,
state and local tax obligations associated with such exercise.

         (c) Stock Withholding

         Southwestern  shall have the right,  when shares of Common Stock are to
be issued upon the exercise of an Option,  in lieu of requiring  the  remittance
required by Section 8(a) hereof,  to withhold a number of such shares,  the Fair
Market  Value of which at the  exercise  date  the  Committee  determines  to be
sufficient to satisfy the federal, state and local withholding tax requirements,
if any,  attributable  to such exercise,  and is not greater than  Participant's
estimated total federal,  state and local tax  obligations  associated with such
exercise.

         (d) Timing and Method of Elections

         If the Participant is subject to Section 16(b) of the Exchange Act, the
Participant may only make such election  described in Section 8(b) hereof if the
Participant is in compliance with the Southwestern  Energy Company  Statement of
Company  Policy on Insider  Trading and the  Southwestern  Energy Company Policy
Regarding Special Trading Procedures.

9.       No Obligation to Exercise

         The grant to the  Participant  of an Option shall impose no  obligation
upon such Participant to exercise such Option.

10.      Transfers Upon Death

         Upon the death of a Participant,  outstanding  Options may be exercised
only by the  executors or  administrators  of a  Participant's  estate or by any
person or persons who shall have  acquired  such right to exercise by Will or by
the laws of descent and distribution. No transfer by Will or the laws of descent
and  distribution of any Option,  or the right to exercise any Option,  shall be
effective to bind  Southwestern  unless the Committee  shall have been furnished
with (a) written notice thereof and with a copy of the Will and/or such evidence
as the  Committee  may deem  necessary to establish the validity of the transfer
and (b) an  agreement  by the  transferee  to  comply  with  all the  terms  and
conditions  of this  agreement  that are or would  have been  applicable  to the
Participant  and to be bound by the  acknowledgments  made by the Participant in
connection with the grant of the Option.

                                       12
<PAGE>

Except as provided  in this  Section 10, no Option  shall be  transferable,  and
shall be exercisable only by a Participant during the Participant's lifetime.

11.      Failure to Comply

         In addition to the  remedies of  Southwestern  elsewhere  provided  for
herein,  failure by the Participant  (or  beneficiary) to comply with any of the
terms and conditions hereof,  unless such failure is remedied by the Participant
(or  beneficiary)  within ten days after having been notified of such failure by
the  Committee,  shall be grounds for the  cancellation  and  forfeiture of such
Option, in whole or in part, as the Committee,  in its absolute discretion,  may
determine.

12.      Applicable Law

         Except to the extent  preempted by any  applicable  federal  law,  this
agreement will be construed and  administered in accordance with the laws of the
State of Arkansas, without reference to the principles of conflicts of law.

                                       13

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00012-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00012-of-00352.parquet"}]]