Document:

<PAGE>   1
                                                                     Exhibit 4.1

COUNTERSIGNED AND REGISTERED:

                   CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
                          TRANSFER AGENT AND REGISTRAR

                                                            AUTHORIZED SIGNATURE

     NUMBER                                                      SHARES
SMDI-                              STANFORD
                                 MICRODEVICES
This Certificate is Transferable                            CUSIP 854399 10 2
in the Cities of Ridgefield Park,                        SEE REVERSE FOR CERTAIN
N.J. or New York, N.Y.                                         DEFINITIONS

              INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

        THIS CERTIFIES THAT

        is the record holder of

     FULLY PAID AND NONASSESSABLE SHARES OF COMMON STOCK, $0.001 PAR VALUE
                                 PER SHARE, OF

                           STANFORD MICRODEVICES, INC

transferable only on the books of the Corporation by the holder hereof in
person or by duly authorized Attorney upon surrender of this certificate
properly endorsed. This certificate is not valid until countersigned by the
Transfer Agent and Registrar.

    WITNESS the facsimile signatures of its duly authorized officers.

Dated:                              [SEAL]

/s/ ROBERT VAN BUSKIRK                               /s/ JOHN OCAMPO
PRESIDENT AND CHIEF EXECUTIVE OFFICER                CHAIRMAN OF THE BOARD

<PAGE>   2
                          STANFORD MICRODEVICES, INC.

     THE CORPORATION WILL FURNISH WITHOUT CHARGE TO EACH STOCKHOLDER WHO SO
REQUESTS THE POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE PARTICIPATING,
OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OR SERIES THEREOF AND
THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND/OR
RIGHTS, SUCH REQUEST MUST BE MADE TO THE CORPORATION'S SECRETARY AT THE
PRINCIPAL EXECUTIVE OFFICE OF THE CORPORATION.

     Keep this Certificate in a safe place. If it is lost, stolen or destroyed,
the Corporation will require a bond of indemnity as a condition to the issuance
of a replacement certificate.

     The following abbreviations, when used in the inscription on the face of
this Certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
     <S>                                                <C>
     TEN COM  - as tenants in common                    UNIF GIFT MIN ACT - _______________ Custodian _______________
                                                                                 (Cust)                   (Minor)
     TEN ENT  - as tenants by the entireties                                under Uniform Gifts to Minors
                                                                            Act _________________________
     JT TEN   - as joint tenants with right of                                          (State)
                survivorship and not as tenants         UNIF TRF MIN ACT - ________________ Custodian (until age ____)
                in common                                                        (Cust)
                                                                           ___________________ under Uniform Transfers
                                                                                 (Minor)
                                                                           to Minors Act _____________________________
                                                                                                    (State)
</TABLE>

    Additional abbreviations may also be used though not in the above list.

FOR VALUE RECEIVED, ______________________ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE
______________________________________

______________________________________

________________________________________________________________________________
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE(S)

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
Shares represented by the within Certificate, and do hereby irrevocably
constitute and

appoint _______________________________________________________________ Attorney
to transfer the said Shares on the books of the within named Corporation with
full power of substitution in the premises.

Dated ________________________________  ________________________________________
                                        NOTICE: THE SIGNATURE OF THIS ASSIGNMENT
                                        MUST CORRESPOND WITH THE NAME AS WRITTEN
                                        UPON THE FACE OF THE CERTIFICATE IN
In presence of                          EVERY PARTICULAR, WITHOUT ALTERATION OR
                                        ENLARGEMENT, OR ANY CHANGE WHATEVER.
______________________________________

______________________________________

Signature(s) Guaranteed

By _______________________________________________________________________
THE SIGNATURES MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM) PURSUANT
TO S.E.C. RULE 17Ad-15.<PAGE>   1

                                                                    EXHIBIT 10.9

                                                      NORTEL AGREEMENT NO. _____
                                                   PURCHASER AGREEMENT NO. _____

                            VOLUME PURCHASE AGREEMENT

This Volume Purchase Agreement (the "Agreement") is between Nortel Networks
Corporation, a company incorporated under the laws of Canada, having an office
at 185 Corkstown Road, Nepean, Ontario, Canada K2H 8V4 ("Nortel") and Stanford
Microdevices Inc., a company incorporated under the laws of Delaware, having an
office at 522 Almanor Avenue, Sunnyvale, CA ("Purchaser").

1.      DEFINITIONS

        "Affiliate" of any person shall mean any corporation which, directly or
        indirectly, is controlled by the same person.

        "Blanket Order" shall mean an Order which does not set forth a Delivery
        Date or Shipping Date in respect of the Hardware, and which identifies
        the minimum quantity of Hardware to be ordered by Purchaser from Nortel
        during the period commencing September 1st 1999 and ending August 31st
        2000.

        "Cancellation Period(s)" shall mean the period(s) so designated in
        Appendix C, which shall end on the Shipping Date.

        "Delivery" shall mean Nortel's delivery of Hardware in good condition on
        board a common carrier at Nortel's Shipping Location.

        "Delivery Date" shall mean the date when the Hardware shall be delivered
        to the Delivery Location.

        "Delivery Location" shall mean the location specified in an Order to
        which the Hardware shall be delivered.

        "Hardware" shall mean the hardware set forth in Appendix A
        (individually, a "Hardware"), provided under this Agreement pursuant to
        an Order, as described in the applicable Technical Specifications, but
        shall exclude Services.

        "Maximum Delivery Period" shall mean the period so designated in
        Appendix C which shall commence on the date that Nortel receives an
        Order or a Release.

        "Maximum Order Amount" shall mean the amount so designated in Appendix
        C.

        "Merchandise" shall mean Hardware not ordered as part of the Hardware
        that is needed for expansion, spares or replacement parts.

        "Minimum Order Amount" shall mean the amount so designated in Appendix
        C.

<PAGE>   2

"Order" shall mean the document used by Purchaser to order Hardware under this
Agreement, and shall specify the quantity of Hardware Purchaser commits to
purchase from Nortel during the subsequent thirteen (13) week period.

        "Parties" shall mean, collectively, Nortel and Purchaser.

        "Party" means, separately, Nortel or Purchaser, as the case may be.

        "Person" shall mean any individual, corporation, partnership, firm,
        joint venture, syndicate, association, trust, government, governmental
        agency, board, commission or authority, and any other form of entity or
        organization.

        "Price Schedule" shall mean the list of prices for the Hardware provided
        to Purchaser by Nortel from time to time.

        "Purchaser Specifications" shall mean any information (including without
        limitation, software, schematics, designs or techniques) supplied by
        Purchaser to Nortel for us in the design or manufacture of the Hardware
        or otherwise incorporated therein.

        "Release" shall mean the document used by Purchaser pursuant to a
        Blanket Order to set the Delivery Date and/or Shipping Date for
        specified quantities of Hardware.

        "Rescheduling Period(s)" shall mean the period(s) so designated in
        Appendix C, which shall end on the Shipping Date.

        "Return Material Authorization" shall mean the distinctive identifier
        provided by Nortel to Purchaser in respect of a Hardware, which
        allegedly does not conform to the warranty in Section 4.1.

        "Services" shall mean services associated with the Hardware which may be
        purchased from or provided by Nortel, such as, but not limited to,
        Hardware replacement, documentation, training or repair pursuant to this
        Agreement.

        "Shipping Date" shall mean the date when a Hardware shall be delivered
        to the carrier at the Shipping Location for shipment to the Delivery
        Location.

        "Shipping Location(s)" shall mean the location(s) so designated in
        Appendix C, from which a Hardware shall be shipped by Nortel.

        "Technical Information" shall mean any information of a scientific or
        technical nature regardless of form or characteristics and in whatever
        form presented, including, but not limited to, inventions, human and
        machine-readable computer software and topography, whether or not
        subject to patent, copyright or other statutory protection.

        "Technical Specifications" shall mean Nortel's standard descriptions,
        engineering information, ordering information, technical specifications,
        installation and test procedures

                                      -2-
<PAGE>   3

        and operating and maintenance/replacement procedures in respect of the
        Hardware. The Technical Specifications are attached hereto as Appendix
        B.

        "Term" shall mean 60 months.

        "Territory" shall mean the world.

        "Vendor Items" shall mean Hardware which is not integral to the
        operation of the Hardware and which is manufactured and/or licensed by
        an entity other than Nortel.

        "Working Day(s)" shall mean Monday through Friday, inclusive, excluding
        holidays recognized by either the federal government of Canada or the
        provincial government of Ontario, excluding December 26 through January
        1, inclusive, unless notice is actually received by an employee of the
        Party to whom it is addressed.

2.      ORDERING AND DELIVERY

2.1     Buyer shall be eligible to place Orders, Blanket Orders, or Releases for
        the Hardware and/or Services, for delivery or performance in the
        Territory, with the benefits of and subject to the terms and conditions
        contained in this Agreement. An Order, Blanket Order or Release
        submitted pursuant to the terms and conditions of this Agreement, and
        which Nortel has accepted within five (5) days of receipt of such Order,
        Blanket Order or Release, shall constitute a contract between Nortel and
        Purchaser, failing such acceptance, any such Order, Blanket Order or
        Release shall be deemed to be void. Purchaser may use the Hardware
        itself in the Territory or use the Hardware to provide services to
        others in the Territory. Purchaser acknowledges and agrees that in no
        circumstances shall this Agreement restrict Nortel from selling, leasing
        or otherwise transferring Hardware, excluding Purchaser Specifications,
        or hardware incorporating purchaser designs/intellectual property, to
        any other Person. [***] Should the terms of any Order, Blanket Order or
        Release conflict with the terms of this Agreement, the terms of this
        Agreement shall govern unless the parties expressly agree in writing to
        the contrary. Notwithstanding that an Order, Blanket Order or Release
        does not refer to this Agreement, any Order, Blanket Order or Release
        issued by Purchaser during the Term shall be deemed to have been issued
        pursuant to this Agreement unless the Parties expressly agree to the
        contrary.

2.2     Purchaser shall issue an Order to Nortel on the third Working Day of
        each week in respect of the subsequent thirteen (13) week period. An
        Order shall set forth a description of the following: (a) Hardware and
        quantity; (b) price (in accordance with the current Price Schedule); (c)
        Delivery Location; (d) the location where the invoice shall be rendered
        for payment; (e) method of shipment; (f) quantity; and (g) Delivery Date
        and/or Shipping Date. An Order or a Release shall not be issued for less
        than the Minimum Order Amount or for more than the Maximum Order Amount
        unless the Parties expressly agree to a larger or smaller amount. All
        shipping documents shall reference the number of the Order issued for
        the Hardware contained in the shipment.

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

                                      -3-
<PAGE>   4

2.3     Purchaser agrees to issue Orders for a minimum of one thousand wafers
        over the first twelve months of the Term, according to the release
        schedule as set out in Appendix C

2.4     Within five (5) Working Days of Nortel's receipt of an Order or a
        Release, Nortel shall either confirm the Shipping Date or propose an
        alternate Shipping Date. If Nortel fails to do so, Nortel shall be
        deemed to have agreed to the Shipping Date set forth by Purchaser. If
        Nortel proposes an alternate Shipping Date, then Purchaser shall within
        five (5) Working Days of its receipt of notice of such alternate
        Shipping Date notify Nortel that either such alternate Shipping Date is
        acceptable or such Order or Release is cancelled. If Purchaser fails to
        give such notice, it shall be deemed to have agreed to the alternate
        Shipping Date.

2.5     Purchaser may, without charge, postpone the Shipping Date at any time
        prior to the commencement of the Rescheduling Period, for a period of up
        to ninety (90) days. If Purchaser cancels an Order or a Release prior to
        the commencement of the Cancellation Period, there shall be no charge to
        Purchaser. If Purchaser cancels an Order or a Release during the
        Cancellation Period, Purchaser shall reimburse Nortel for the actual
        costs Nortel has incurred in connection with the manufacture of such.

2.6     Purchaser may, at any time, request additions, alterations, deductions
        or deviations to an Order subject to the condition that such changes and
        any adjustments resulting from such changes including, but not limited
        to, schedules and prices, shall be mutually agreed upon and, if so
        agreed, subsequently detailed in a written revision to the applicable
        Order (a "Change Order"). Purchaser acknowledges that a premium charge
        may be applied by Nortel should Nortel agree to process a Change Order
        outside of its standard Order processing cycle for a Hardware or in the
        event that a Change Order requires an additional amount of work (such as
        engineering) to be undertaken to comply with such changes.

2.7     The Parties may add new Hardware to Appendix A upon mutual agreement in
        writing. The process the Parties shall follow, unless otherwise mutually
        agreed, to add new Hardware to Appendix A is described in Appendix E.

2.8     In the event that Nortel decides to cease production of the Hardware for
        any reason, including but not limited to discontinuance of its wafer
        manufacturing business or significant changes to its wafer manufacturing
        process, Nortel will provide Purchaser with a written end-of-life notice
        six (6) months prior to such end of production. Upon receipt of such
        notice, Purchaser shall submit last time purchase orders to Nortel no
        later than either (a) three (3) months after receipt of such notice if
        Purchaser's last time purchase order is for a quantity of hardware that
        will exceed one hundred fifty (150%) of the quantity of Hardware
        purchased under this Agreement in the twelve (12) months preceding
        Purchaser's receipt of such notice or (b) no later than six (6) months
        after receipt of such notice if Purchaser's last time purchase order is
        for a quantity of hardware that are less than one hundred fifty (150%)
        of the quantity of Hardware purchased under this Agreement in the twelve
        (12) months preceding Purchaser's receipt of such notice. The maximum
        quantity of a last time purchase may not exceed three hundred percent
        (300%) of the quantity purchased under this Agreement in the twelve (12)
        months preceding Purchaser's receipt of such notice and Purchaser must
        take delivery of the full order with fifteen (15) months of the notice,
        unless rescheduled by Nortel

                                      -4-
<PAGE>   5

        in its sole discretion. Last time purchase orders shall be subject to
        the terms and conditions of this Agreement.

3.      PRICE, PAYMENT AND RISK OF LOSS

3.1     Unless otherwise indicated in the Price Schedule, the prices set forth
        in the Price Schedule are: (a) in U.S. dollars; (b) F.O.B. Nortel's
        Shipping Location; (c) exclusive of any applicable excise and sales
        taxes now existing or hereinafter imposed by any applicable taxing
        authority; and (d) exclusive of transportation and insurance charges
        applicable between the Shipping Location and the Delivery Location. Such
        taxes, transportation and insurance charges and duty for which Purchaser
        is liable shall be separately stated on the invoice.

3.3     As of the moment of Delivery of a Hardware, Purchaser accepts all risks
        of loss, mishandling, breakage, and other damages relating thereto.
        Times quoted for Delivery will date from acceptance of the Order by
        Nortel. Title shall pass to Purchaser upon receipt of full payment by
        Nortel. If Purchaser returns a Hardware, risk of loss or damage for such
        Hardware shall pass to Nortel when Purchaser delivers the Hardware to
        the Shipping Location.

3.4     Purchaser grants to Nortel a first priority purchase money security
        interest in the Hardware. Nortel may perfect such interest, and
        Purchaser shall assist Nortel, as reasonably necessary, to do so. Nortel
        may retain such interest until title to the Hardware has passed to
        Purchaser. Prior to Hardware title transfer, Purchaser shall not cause
        or permit the Hardware or any portion thereof, to be sold, leased or
        subjected to a lien or other encumbrance.

3.2     Nortel shall issue invoices for Hardware and/or Services ordered
        hereunder as follows:

        (a) Invoices for Hardware, Merchandise and/or Vendor Items shall be
        issued upon Delivery of the Hardware, Merchandise and/or Vendor Items.

        (b) Invoices for Services shall be issued upon completion of the
        Services.

        (c) All invoices shall be paid in full by Purchaser within [***]
        days of the date of Nortel's invoice. Overdue payments may, at Nortel's
        sole discretion, be subject to interest charges, calculated daily from
        the date due, at one percent (1%) per month, twelve percent (12%) per
        annum) or such lesser rate as maybe the maximum permissible rate under
        applicable law.

        (d) All payments hereunder shall be made in U.S. dollars ($U.S.).

4.      WARRANTY

4.1     Nortel warrants to Purchaser that Hardware will at the time of delivery
        are new and free and clear of all liens and encumbrances. Nortel further
        warrants that the hardware will be free from defects in material and
        workmanship for a period of twelve months after delivery such that the
        hardware meets the technical specifications outlined in appendix B.

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

                                      -5-
<PAGE>   6
4.2     Purchaser shall provide written or verbal notice of any Hardware, which
        does not conform to the warranty described in Section 4.1 within two
        weeks of discovery of such defects. If Purchaser has not so notified
        Nortel of any such nonconformance within two weeks of discovery of such
        defects of the relevant Hardware, Purchaser shall be deemed to have
        accepted this Hardware and Nortel shall have no obligation to replace
        this Hardware. If Purchaser does notify Nortel of a nonconformance to
        the warranty described in section 4.1 within two weeks of the discovery
        of such defects of the relevant Hardware, Nortel shall, at Nortel's
        option, replace the Hardware which does not conform to the warranty or
        (b) refund to Purchaser the price of such Hardware. All transportation
        and other expenses arising from shipping the non-conforming Hardware to
        the Shipping Location shall be paid by Purchaser. All transportation and
        other expenses arising from shipping the repaired or replaced
        non-conforming Hardware from the Shipping Location to the Delivery
        Location shall be paid by Nortel.

4.3     Purchaser shall provide written or verbal notice of any Hardware, which
        does not conform to the incoming inspection as outlined in Appendix B.
        If Purchaser has not so notified Nortel of any such nonconformance
        within five weeks of delivery of the relevant Hardware, Purchaser shall
        be deemed to have accepted this Hardware and Nortel shall have no
        obligation to replace this Hardware. If Purchaser does notify Nortel of
        a nonconformance to the incoming inspection as outlined in Appendix B
        within five weeks of the delivery of the relevant Hardware, Nortel
        shall, at Nortel's option, replace the Hardware which does not conform
        to the incoming inspection or (b) refund to Purchaser the price of such
        Hardware. All transportation and other expenses arising from shipping
        the non-conforming Hardware to the Shipping Location shall be paid by
        Purchaser. All transportation and other expenses arising from shipping
        the repaired or replaced non-conforming Hardware from the Shipping
        Location to the Delivery Location shall be paid by Nortel.

4.4     Vendor Items resold by Nortel as part of the Hardware provided hereunder
        shall bear the warranty of the original equipment manufacturer only.

4.5     Nortel shall assign a Return Material Authorization to each Hardware
        identified by Purchaser as allegedly not conforming to the warranty in
        Section 4.1 Nortel shall promptly provide the Return Material
        Authorization to Purchaser. Purchaser and Nortel shall use the Return
        Material Authorization in all communications in respect of such
        Hardware.

4.6     THE WARRANTIES PROVIDED HEREUNDER ARE IN LIEU OF ALL OTHER WARRANTIES,
        GUARANTEES OR CONDITIONS PERTAINING TO THE HARDWARES AND SERVICES,
        WRITTEN OR ORAL, STATUTORY, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY
        AS TO MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR
        NONINFRINGEMENT, AND THE PROVISIONS HEREIN SHALL CONSTITUTE NORTEL'S
        SOLE OBLIGATION AND LIABILITY AND PURCHASER'S SOLE REMEDY FOR BREACH OF
        WARRANTY. NORTEL SHALL NOT BE RESPONSIBLE FOR ANY WARRANTY OFFERED BY
        PURCHASER TO ANY CUSTOMER(S) OF PURCHASER. IN NO EVENT SHALL NORTEL BE
        LIABLE FOR ANY

                                      -6-
<PAGE>   7

        INCIDENTAL, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES RELATING TO
        BREACH OF WARRANTY.

5.      TERM AND TERMINATION

5.1     This Agreement shall commence on the Effective Date and continue in
        effect for the Term. This Agreement shall be automatically renewed for
        additional terms of twelve (12) months each on an annual basis after the
        Term, unless either Party notifies the other in writing of its intent to
        terminate the Agreement, and such notice is received at least sixty
        (180) days prior to the end of the current term.

5.2     Subject to Sections 5.3 and 5.4, the termination of this Agreement shall
        not effect the rights or obligations of either Party to the other under
        any Order or Release issued by Purchaser and accepted by Nortel prior to
        such termination.

5.3     If either Party shall be declared insolvent or bankrupt, or if any
        assignment of its property shall be made for the benefit of creditors or
        otherwise, or if its interest herein shall be levied upon under
        execution or seized by virtue of any writ of any court, or if a petition
        is filed in any court to declare such Party bankrupt and not dismissed
        in sixty (60) days, or if a trustee in bankruptcy, receiver or
        receiver-manager or similar officer is appointed for such Party or for
        any of such Party's assets, then the other Party may, at its option,
        terminate, without charge, this Agreement and/or any or all outstanding
        Orders and Releases and shall thereupon be free from all liability and
        obligations thereunder. The ability of a Party to terminate in such
        instances shall be subject to the applicable bankruptcy and insolvency
        statutes.

5.4     Subject to Section 5.3, a Party (the "Non-Breaching Party") may
        terminate an Order or a Release only if the other Party (the "Breaching
        Party") is in material breach of a term of this Agreement or an Order or
        Release and such breach has not been corrected within thirty (30)
        Working Days after the date of the Non-Breaching Party's notice thereof
        to the Breaching Party. In the event Purchaser terminates an Order or
        Release pursuant to this Section 5.4, Purchaser shall reimburse Nortel
        for the actual costs incurred to date in connection such Order or
        Release.

6.      INTELLECTUAL PROPERTY RIGHTS

6.1     This Agreement shall not constitute any transfer of intellectual
        property rights of any nature whatsoever.

6.2     Nortel acknowledges that all Purchaser Specifications for the Hardware
        are the property of Purchaser.

6.3     Subject to Section 6.4 below, Nortel agrees not to use the Purchaser
        Specifications or any customized ASIC, test vectors, or tooling
        generated exclusively for the Hardware in the course of development
        other than for the manufacture of the Hardware on behalf of Purchaser.
        Purchaser acknowledges and agrees that place and route data, database
        tapes, mask sets and other customized data relating to the Hardware
        contain proprietary information

                                      -7-
<PAGE>   8

        of Nortel and Purchaser, and such materials shall therefore remain in
        the custody of Nortel at all times. Upon request of Purchaser, however,
        Nortel shall destroy such materials produced for Purchaser and provide
        certification thereof.

6.4     Nortel or its licensors shall own and retain all intellectual property
        rights (including, without limitation, mask work rights) associated with
        any and all circuitry design components and process technology furnished
        by Nortel in connection with the design, development or manufacture of
        the Hardware, including but not limited to 9I) all base array layers
        (ii) all Nortel-licensed library elements (including, without
        limitation) any megafunctions or macrocells) and (iii) all
        Nortel-furnished modification of any such library elements. The rights
        of Purchaser in the Hardware designed hereunder shall be strictly
        limited to control of the customized configuration of the Hardware
        created by the interconnections of such elements of hardware information
        contained in the Hardware manufactured for Purchaser.

6.5     Nortel shall own any process, pattern or device discovered by Nortel in
        the course of performing this Agreement. If Purchaser discovers any
        process, pattern, or device in the course of designing or developing the
        Hardware, Nortel shall automatically acquire a fully paid, perpetual,
        worldwide license to use such invention in connection with the
        manufacture of the Hardware. The Parties shall be deemed joint owners of
        any invention, which is jointly discovered.

6.6     Purchaser covenants not to remove, modify or obscure Nortel's logos and
        part numbers on the Hardware.

7.      CONFIDENTIAL INFORMATION

7.1     Any Technical Information, specifications, drawings, documentation,
        schematics, models, pricing information and "know-how" of every kind and
        description whatsoever provided by one Party ("Discloser") to the other
        ("Recipient") in connection with the negotiation or performance of this
        Agreement or any Order or Release, regardless of form, shall be deemed
        to be confidential information, and the exclusive property, of Discloser
        except if such information is: (a) in or becomes part of the public
        domain through no fault of Recipient; (b) disclosed to Recipient by a
        third party without restriction; (c) known to Recipient at the time of
        disclosure and is so documented; (d) independently developed by
        Recipient without access to any information furnished to it by Discloser
        and is so documented; or (e) disclosed when such disclosure is compelled
        pursuant to legal, judicial or administrative proceeding, or otherwise
        required by law, subject to Recipient giving all reasonable prior notice
        to Discloser to allow it to seek protective or other court orders. All
        such confidential information, except as specifically authorized in
        writing by Discloser or as provided hereunder, shall be held in
        confidence by Recipient and, if in written form, returned to Discloser
        upon its request. Recipient shall not: (x) disclose or allow to be
        disclosed such information except to its employees who have a bona fide
        need to know; (y) reproduce such information without the written consent
        of Discloser; or (z) use any of such information for any purpose other
        than the satisfaction of its rights and obligations under this
        Agreement. The foregoing obligations of confidentiality shall survive
        for a period of five (5) years after the applicable disclosure,
        notwithstanding the termination or expiration of this Agreement.

                                      -8-
<PAGE>   9

8.      INDEMNIFICATION

8.1     Nortel, at its expense, shall indemnify, defend and hold harmless
        Purchaser against any claim in the United States of America or Canada
        based on an allegation that a Hardware (except for Vendor Items)
        infringes a United States or Canadian patent, copyright, or trademark of
        another Person, or violates any trade secret or other proprietary
        interest of another Person except in respect of any claim relating to
        designs or information furnished by Purchaser, and Nortel will pay any
        resulting costs, damages, and attorney's fees finally awarded against
        Purchaser that are attributable to such claim and will pay the part of
        any settlement that is attributable to such claim provided that: (a)
        Purchaser notifies Nortel promptly in writing of the claim; (b) Nortel
        is permitted to control the defense or settlement of the claim; and (c)
        Purchaser cooperates reasonably in such defense or settlement at
        Nortel's expense. Purchaser shall not settle or compromise any such
        legal action without Nortel's prior written approval. The selection of
        counsel to be employed in the defense of such legal action shall be
        within Nortel's sole discretion. Such indemnity shall not apply in the
        event the Hardware(s) have been modified by Purchaser, have been
        utilized in a manner other than as specified by Nortel or are used or
        located outside the Territory. The indemnity provided herein shall not
        extend to any legal action based upon any infringement or alleged
        infringement of any patent, trademark or copyright by Vendor Items, or
        by the combination of any Hardware furnished by Nortel with other
        equipment not furnished by Nortel. Notwithstanding the above, Nortel
        shall have no obligation or liability with regard to any patent
        infringement suit, claim, or proceeding that may be made or brought
        against Purchaser (i) alleging that method of use claims in such patent
        are infringed by any service offering and/or by any use by Purchaser of
        Hardware furnished hereunder to make such service offering available or
        (ii) resulting in a settlement payment, or award of damages, or
        accounting of profits, where such settlement, award, or accounting is
        based on the revenues or profits earned or other value obtained by
        Purchaser from its use of such Hardware and/or is based on the lost
        revenues or profits of third parties arising from Purchaser's use of
        such Hardware.

8.2     In its defense or settlement of any such claim described in Section 8.1
        Nortel may: (a) procure for Purchaser the right to continue using the
        Hardware; (b) modify the Hardware or the Hardware manufacturing process
        so that the use or manufacturing of the Hardware becomes non-infringing;
        (c) replace the Hardware with equivalent Hardware not subject to such
        claim; or (d) in the event none of the foregoing is commercially
        feasible, refund Purchaser the price paid for such Hardware, and
        Purchaser shall return such Hardware to Nortel immediately.

8.3     Independent of any other limitation, in no event shall Nortel be liable
        to Purchaser or to parties claiming through or on behalf of Purchaser
        for special, incidental, exemplary, consequential or indirect damages or
        for loss of anticipated profits pursuant to the indemnities provided in
        this Article 8. In no event shall Nortel's liability to Purchaser or its
        customers or any other Persons pursuant to Section 8.1 exceed in the
        aggregate the monies received by Nortel from Purchaser pursuant to this
        Agreement to the date of such claims. The foregoing states the entire
        obligation and liability of Nortel with respect to infringement or
        violation of any proprietary interest of another Person and claims
        thereof.

                                      -9-
<PAGE>   10

8.4     Purchaser, at its expense, shall indemnify, defend and bold harmless
        Nortel against any claim based on an allegation that the designs and
        information provided by Purchaser in respect of Hardware infringes a
        patent, copyright, or trademark of another Person, or violates any trade
        secret or other proprietary interest of another Person, and Purchaser
        will pay any resulting costs, damages, and attorney's fees finally
        awarded against Nortel that are attributable to such claim and will pay
        the part of any settlement that is attributable to such claim provided
        that: (a) Nortel notifies Purchaser promptly in writing of the claim;
        (b) Purchaser is permitted to control the defense or settlement of the
        claim; and (c) Nortel cooperates reasonably in such defense or
        settlement at Purchaser's expense.

8.5     In its defense or settlement of any such claim described in Section 8.4
        Purchaser may: (a) procure for Nortel the right to continue using the
        design and information; (b) modify the design and information so that it
        is non-infringing; or (c) replace the design and information with an
        equivalent design and information not subject to such claim.

8.6     Independent of any other limitation, in no event shall Purchaser be
        liable to Nortel or to parties claiming through or on behalf of Nortel
        for special, incidental, exemplary, consequential or indirect damages or
        for loss of anticipated profits pursuant to the indemnity in Section
        8.4.

8.7     Each Party hereto shall indemnify and save the other harmless from any
        liabilities, claims or demands (including the costs, expenses and
        reasonable attorney's fees on account thereof) that may be made by
        anyone for bodily injuries, including death, or damage to tangible
        personal property, resulting from the negligence and/or willful
        misconduct of that Party, its employees or agents in the performance of
        this Agreement. Each Party shall defend the other at the other's request
        against any such liability, claim or demand. Each Party shall notify the
        other promptly of written claims or demands against such Party of which
        the other Party is responsible hereunder.

9.      LIMITATION OF LIABILITY

9.1     IN NO EVENT SHALL EITHER PARTY BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
        INDIRECT, EXEMPLARY OR CONSEQUENTIAL DAMAGES OR LOSS FOR ANY BREACH OF
        THIS AGREEMENT, TORT OR OTHER LEGAL THEORY, INCLUDING NOT LIMITED TO
        LOSS OF OPPORTUNITY, USE, INCOME OR PROFIT OR OTHER SUCH CLAIMS ARISING
        FROM ANY CAUSE WHATSOEVER. THIS LIMITATION SHALL SURVIVE ANY TERMINATION
        OF THIS AGREEMENT. IN NO EVENT SHALL NORTEL BE LIABLE FOR DAMAGES FOR
        ANY CAUSE WHATSOEVER IN ANY AMOUNT IN EXCESS OF, IN AGGREGATE, THE
        MONIES RECEIVED BY NORTEL FROM PURCHASER PURSUANT TO THIS AGREEMENT TO
        THE DATE OF SUCH LIABILITY.

9.2     Any action for breach of this Agreement or to enforce any right
        hereunder shall be commenced within two (2) years after the cause of
        action occurs or it shall be deemed waived and barred.

                                      -10-
<PAGE>   11

10.     FORCE MAJEURE

10.1    Nortel shall not be responsible or liable to Purchaser for any delay or
        failure to perform hereunder if such delay or failure results from fire,
        explosion, labor dispute, earthquake, casualty or accident, lack or
        failure of transportation facilities, epidemic, flood, drought, or by
        reason of war, declared or undeclared, revolution, civil commotion, the
        act of a public enemy, blockade or embargo, act of God, any inability to
        obtain any requisite license, permit or authorization, or by reason of
        any law, proclamation, regulation, ordinance, demand, or requirement of
        any government or by reason of any other cause whatsoever, whether
        similar or dissimilar to those enumerated, beyond the reasonable control
        of Nortel. With respect to labor disputes as described above, Nortel
        shall not be obligated to accede to any demands being made by employees
        or other personnel. All such causes will delay Nortel's performance
        hereunder for a period equal to the delay resulting from any such causes
        and such additional period as may be reasonably necessary to allow
        Nortel to resume its obligations.

11.     ACCESS TO PREMISES

11.1    Each Party shall, subject to reasonable notice, have access to the
        premises of the other Party in order to perform their respective
        obligations under this Agreement. Each Party shall comply with the
        general security and safety rules of the other Party, as appropriate,
        when in such premises. In addition, each Party acknowledges that its
        access to the other Party's premises may be restricted by the host
        Party, acting reasonably, in order to preserve the host Party's trade
        secrets and obligations of confidentiality to third parties.

12.     GENERAL

12.1    Any notices to be given under this Agreement shall be sent by certified
        mail, postage prepaid, or by facsimile or hand delivery to the other
        Party at the addresses set forth below and to the attention of:

        Nortel:       Legal notices:
                      Corporate Secretary
                      Nortel Networks Corporation
                      8200 Dixie Road, Suite 100
                      Brampton, Ontario
                      L6T 5P6 Canada

                      Business notices:
                      Nortel Advanced Components
                      Nortel Networks Corporation
                      185 Corkstown Road
                      Nepean, Ontario
                      K2H 8V4 Canada

                                      -11-
<PAGE>   12

               Stanford Microdevices:       Stanford Microdevices
                                            Attn: Jerry Quinnell
                                            Chief Operating Officer
                                            522 Alamnor Ave.
                                            Sunnyvale, CA USA 94086
                                            Fax: (408) 739-0970

12.2    Notices shall be deemed to have been received five (5) Working Days
        after mailing if given by mail, one (1) Working Day after sending if
        given by facsimile and upon delivery if given by hand. A Party may
        change its address for notices by written notice to the other Party in
        the manner provided in Section 12.1.

12.3    The failure of a Party to enforce any provision of this Agreement shall
        not constitute a waiver of such provision or the right of such Party to
        enforce such and every other provision.

12.4    The validity, interpretation and performance of this Agreement, the
        rights and obligations arising hereunder and any purchase made hereunder
        shall be governed by the laws of the Province of Ontario and the federal
        laws of Canada applicable therein, without giving effect to the
        principles of conflicts of laws thereof and without reference to the
        UNCITRAL Convention on Agreements for the International Sale of Goods.

12.5    Neither Party shall assign this Agreement or any rights hereunder
        without the prior written consent of the other Party. Notwithstanding
        the foregoing, Nortel may assign this Agreement to any Nortel Affiliate
        or manufacturing licensee without the consent of the Purchaser. Nortel
        may subcontract any of its obligations under this Agreement, but no such
        subcontract shall relieve Nortel of primary responsibility for
        performance of its obligations.

12.6    Purchaser shall not export any technical data received from Nortel
        pursuant to this Agreement, or release any such technical data with the
        knowledge or intent that such technical data will be exported or
        transmitted to any country or to foreign nationals of any country,
        except in accordance with applicable U.S. and/or Canadian law concerning
        the exporting of such technical data Purchaser shall obtain all
        authorizations from the U.S. and/or Canadian government in accordance
        with applicable law prior to exporting or transmitting any such
        technical data as described above.

12.7    A Party shall not release, without the prior written approval of the
        other Party, any advertising or other publicity relating to this
        Agreement wherein such other Party may reasonably be identified. In
        addition, each Party shall take reasonable precautions to keep the
        existence of this Agreement confidential so long as this Agreement
        remains in effect and for a period of [***] years thereafter, except
        as may be otherwise expressly provided in this Agreement or as may be
        reasonably required to enforce this Agreement by law.

12.8    Section headings are inserted for convenience only and shall not be used
        to interpret this Agreement.

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

                                      -12-
<PAGE>   13

12.9    All obligations and liabilities which, by their nature, are intended to
        survive the expiration or termination of this Agreement shall remain in
        effect beyond any expiration or termination.

12.10   The invalidity in whole or in part of any provision of these terms and
        conditions shall not void or effect the validity of any other provision
        of this Agreement. The Parties hereto agree to substitute any provision
        of these terms and conditions which is or shall become invalid by such
        provision which in its legal and commercial contents is the most similar
        to the invalid provision.

12.11   This Agreement, including the Appendices to it, constitutes the entire
        agreement between the Parties on the subject matter hereof and
        supersedes prior agreements and communications, written or oral, with
        respect thereto. Except for the information which must be set forth in
        an Order, Blanket Order or Release in accordance with Articles 1 and 2,
        any additional or different term set forth in any Order, Blanket Order
        or Release, acknowledgment form, quotation or other document hereafter
        issued shall be void. This Agreement may not be modified or any right of
        a Party waived, except by means of an amendment, which expressly
        references this Agreement and is duly executed by each of the Parties.

12.12   This Agreement is not intended to and shall not constitute, create, give
        effect or otherwise recognise a joint venture, partnership, agency
        relationship or formal business entity of any kind.

IN WITNESS WHEREOF, the Parties hereto have signed this Agreement by their duly
authorized representatives as of the date first written above.

Nortel Networks Corporation                  STANFORD MICRODEVICES INC.

By:  /s/ Barbara Callaghan                   By: /s/ Robert M. Van Buskirk
     -------------------------------             -------------------------------

Print Name:   Barbara Callaghan              Print Name:   Robert M. Van Buskirk
           -------------------------                    ------------------------

Title:   VP & GM Microelectronics            Title:   CEO
      ------------------------------               -----------------------------

Date:   October 12, 1999                     Date:  15 September 1999
      ------------------------------              ------------------------------

By:  /s/ D. Wilson                           By:
     -------------------------------             -------------------------------

Print Name:   D. Wilson                      Print Name:
           -------------------------                    ------------------------

Title:  Sr. Counsel                          Title:
      ------------------------------               -----------------------------

Date:  9 Nov 99                              Date:
      ------------------------------              ------------------------------

                                      -13-
<PAGE>   14

                                   APPENDIX A

                                    HARDWARES

[***]

[***] Certain information on this page has been omitted and filed separately
with the Commission. Confidential treatment requested has been requested with
respect to the omitted portions.
<PAGE>   15

                                   APPENDIX B

                            TECHNICAL SPECIFICATIONS

[***]

[***] Certain information on this page has been omitted and filed separately
with the Commission. Confidential treatment requested has been requested with
respect to the omitted portions.
<PAGE>   16

                                   APPENDIX C

                                     GENERAL

Shipping Location:

Delivery Location:

Rescheduling Period:  13 weeks

Cancellation Period:  13 weeks

Maximum Delivery Period:  15 weeks

Minimum Order Amount:  [***]

Maximum Order Amount:  [***]

Release Schedule:     [***]

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

<PAGE>   17

                                   APPENDIX D

[***]

[***] Certain information on this page has been omitted and filed separately
with the Commission. Confidential treatment requested has been requested with
respect to the omitted portions.
<PAGE>   18

                                   APPENDIX E

                        NEW HARDWARE INTRODUCTION PROCESS

              Nortel requires a fabrication cycle time of 13 weeks.

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