[Portions  have  been  omitted  and filed  separately  with the  Securities  and
Exchange Commission in accordance with Rule 24b-2 of the Securities Exchange Act
of 1934, as amended, and the Registrant's request for confidential treatment.]

CUSTOM SALES AGREEMENT
BASE AGREEMENT

Custom Sales Agreement No. X0718
Integrated Device Technology, Inc.
International Business Machines Corporation
281 Winters Street Waltham, MA 02254

Agreement No.  X0718


Customer:  Integrated Device Technology, Inc.
           2975 Stender Way
           Santa Clara, CA  95054

This Custom Sales Agreement, which consists of this Base Agreement and Statement
of Work Attachments,  shall be referred to as the "Agreement".  The term of this
Agreement commences on January 19, 1998 and expires on January 31, 2001.

By signing below, the parties each agree to be bound by the terms and conditions
of this  Agreement and the initial  Statement of Work,  Attachment No. 1, and no
additional  signature on the initial  Statement of Work is required.  Subsequent
Statement of Work Attachments under this Agreement must be signed by the parties
to become effective.

Upon  signature by both parties,  it is agreed this  Agreement  constitutes  the
complete and exclusive  agreement between them superseding any prior agreements,
written  or  oral,  relating  to the  subject  matter  notwithstanding  anything
contained in any document  issued by either party.  Purchase orders may not vary
the terms of this Agreement.  Additional, different and/or conflicting terms and
conditions on a purchase order shall be of no effect unless  mutually  agreed to
in writing.  This  Agreement may not be amended or modified  except by a written
amendment signed by both parties.

The parties expressly  acknowledge that they have received and are in possession
of a copy  of any  referenced  item  which  is not  physically  attached  to the
Agreement and any such item will be treated as if attached.

Accepted and Agreed To:

Integrated Device Technology, Inc. International Business Machines Corporation
By:__________________________       By:_______________________________
Name: Len Perham                    Name:  Peter Hansen
Title:  CEO and President           Title: V. P. of North American Sales
Date:_________________________      Date:______________________________


1.0 DEFINITIONS

Capitalized terms in this Agreement have the following  meanings.  An Attachment
may define additional terms; however, those terms apply only to that Attachment.

1.1 "Item" shall mean any part, specification, design, document, report, data or
the like which Customer delivers to IBM under this Agreement.

1.2 "Product"  shall mean  production  units to be sold or purchased  under this
Agreement. Products shall not include Prototypes.

                                       1



1.3 "Prototype"  shall mean a preliminary  version of a Product which may or may
not be functional,  is intended for internal use and testing and not for resale,
and is not suitable for production in commercial quantities.

1.4 "Purchase  Order Lead Time" shall mean the required  minimum  amount of time
between IBM's receipt of the purchase order issued by Customer and the requested
shipment date necessary to accommodate manufacturing cycle time.

1.5 "Related Company" of a party hereunder shall mean a corporation,  company or
other entity which controls or is controlled by such party or by another Related
Company of such party,  where  control  means  ownership  or control,  direct or
indirect,  of more than fifty (50) percent of: (i) the outstanding voting shares
or securities  (representing  the right to vote for the election of directors or
managing authority),  or (ii) the ownership interests  representing the right to
make decisions for such a corporation,  company or other entity (as the case may
be in  partnership,  joint  venture  or  unincorporated  association  having  no
outstanding  shares or securities).  However,  any such corporation,  company or
other entity shall be deemed to be a Related  Company of such party only so long
as such ownership or control exists.

1.6 "Service" shall mean any  manufacturing  activity or design,  or engineering
work IBM performs.

1.7 "Shipment Date" shall mean IBM's estimated date of shipment.

2.0 AGREEMENT STRUCTURE

2.1 This Agreement  consists of: (i) the Base Agreement  which defines the basic
terms  and  conditions  of  the  relationship  between  the  parties;  and  (ii)
Attachments which specify the details of a specific work task. An Attachment may
include  additional or differing  terms and  conditions,  however such terms and
conditions  apply  only  to  that  Attachment.   Attachments  also  include  any
specification documents agreed to by the parties applicable to the specific work
under that Attachment.

2.2 If there is a  conflict  among  the  terms  and  conditions  of the  various
documents, Attachment terms and conditions govern.

2.3 Purchase  orders will be used to convey  information  only and any terms and
conditions on those are void and replaced by this Agreement.

2.4 Either  party may include  its Related  Companies  under this  Agreement  by
written agreement with the other party.

3.0 ORDER AND DELIVERY

3.1  Customer  shall order  Products and  Services by issuing  written  purchase
orders,  which are subject to  acceptance by IBM.  Purchase  orders for Products
must be received by IBM in advance,  with at least the Purchase  Order Lead Time
specified in the applicable Attachment.

3.2 Products  will be shipped to Customer FOB plant of  manufacture,  except for
Products  shipped  outside the United  States which will be shipped  EXWORKS (as
defined in ICC INCOTERMS).

3.3 Title to the  Products  and risk of loss  shall  pass to the  Customer  upon
delivery to the carrier for shipment to the Customer.

4.0 CANCELLATION AND RESCHEDULING

4.1 If IBM's supply of the Product and/or  Services  ordered  hereunder  becomes
constrained,  IBM will reduce the quantities of Products  and/or  Services to be
supplied  to the  Customer in  proportion  to the  reduction  in  quantities  of
products   and/or  services  of  the  same  technology  or  utilizing  the  same
manufacturing  process  to be  supplied  to  satisfy  others.  Receipt  of  such
allocated supply and later delivery of all undelivered  ordered quantities shall
constitute Customer's exclusive remedy in the event of such a supply constraint.

4.2 Customer may cancel or reschedule an order for Products and/or Services only
upon prior written notice to IBM. In the event of a  cancellation  or reschedule
which exceeds the  rescheduling  rights set forth in an  applicable  Attachment,
Customer shall pay the quoted price for Products  and/or  Services  delivered or
tendered  and refused  and the  cancellation  charges  for  binding

                                       2



portions of Customer's forecast and any cancelled  work-in-progress as set forth
in the applicable Attachment.

4.3 Customer  agrees that if Customer  decreases the total  quantity of an order
that has a unit  price  based on an  agreed  to  quantity  Customer  will pay an
applicable higher unit price for new shipments.

5.0 PAYMENT

5.1 Prices for  Products  and  Services  shall be as set forth in an  applicable
Attachment.  IBM shall invoice  Customer after the Products have been shipped or
the Services  provided.  Payment by the Customer  will be due within thirty (30)
days from the date of  invoice.  Late  payment of  invoices  will be  assessed a
charge  equal to the lesser of one percent  (1.0%) per month or the  statutorily
maximum rate of interest in  accordance  with the laws of the State of New York.
In addition, if Customer's account balance exceeds its credit limit with IBM, or
becomes delinquent,  IBM may stop shipments to Customer or ship to Customer on a
prepaid basis until the account is current again.

6.0 TERMINATION

6.1 If either  party  materially  breaches a term of this Base  Agreement  or an
Attachment,  the other party may, at its option, terminate this Agreement or any
or all  Attachments  provided  the party in breach is given  written  notice and
fails to cure  such  breach  within 30 days or  immediately  in the event of (i)
insolvency,  dissolution or  liquidation  by or against  either party,  (ii) any
assignment of either party's assets for the benefit of creditors,  (iii) any act
or  omission  of an act by a party  demonstrating  its  inability  to pay  debts
generally as they become due, or (iv) if IBM has a  reasonable  basis to believe
any of the Items infringe  intellectual  property rights.  In addition,  IBM may
terminate  this  Agreement  upon  twelve  (12) months  prior  written  notice if
Customer  transfers all or  substantially  all of its business assets to a third
party.

6.2 If IBM terminates this Agreement or an Attachment,  IBM shall be entitled to
treat any or all  applicable  outstanding  purchase  orders as if  cancelled  by
Customer and Customer  shall pay the quoted  price  applicable  for any affected
Products and/or Services delivered or tendered and refused, and the cancellation
charges  for  binding   portions  of  Customer's   forecast  and  any  cancelled
work-in-progress  as set  forth in the  applicable  Attachment  or  Attachments.
Monies owing IBM shall become immediately due and payable.

6.3 If Customer  terminates  this Agreement or an Attachment,  IBM will fill all
applicable  previously accepted purchase orders for Products,  but IBM shall not
be obligated  to accept  further  applicable  purchase  orders  after  receiving
notice.

6.4 This Base Agreement will continue after its  termination or expiration  with
respect to any Attachments already in place until they expire, are terminated or
completed.  Provided  that no  monies  are due IBM,  applicable  Items  shall be
disposed of as directed by  Customer in writing at  Customer's  expense  after a
termination or expiration.

7.0 CONFIDENTIAL INFORMATION

7.1 With the  exception of prices and  quantities  of Products  and/or  Services
hereunder,  no  information  exchanged  between the parties  shall be considered
confidential and/or proprietary to either party, or to any third party except as
may be specified pursuant to Section 7.2 below.

7.2 In the  event  IBM or  Customer  needs  to  disclose  specific  confidential
information to the other in order for IBM to furnish  Products  and/or  Services
hereunder,  such information  shall be disclosed only pursuant to the terms of a
confidential information exchange agreement executed by the parties.

8.0 LICENSE

8.1 No license,  immunity  or other right is granted  herein by one party to the
other whether directly or by implication, estoppel or otherwise, with respect to
any patent, trademark,  copyright, mask work, trade secret or other intellectual

                                       3



property right to such party,  with the exception of Customer's  right to use or
resell any Product sold by IBM to Customer  pursuant to this  Agreement and with
the further  exception that IBM shall have all rights and licenses  necessary to
manufacture  Products and  Prototypes  for  Customer and to provide  Services to
Customer in accordance with this Agreement.

9.0 TRADEMARK

9.1 Nothing in this  Agreement  grants  either party any rights to use the other
party's  trademarks or trade names,  directly or indirectly,  in connection with
any product, service, promotion, or to make any publication or publicity without
prior written approval of the other party or owner.

10.0 INTELLECTUAL PROPERTY AND INDEMNIFICATION

10.1 IBM agrees to indemnify  Customer against damages assessed against Customer
as a result of a final  judgment of a court of  competent  jurisdiction  holding
that any Product sold or Service provided by IBM to Customer hereunder infringes
a patent or  copyright  of a third  party in any  country  in which IBM sells or
provides  similar  products or  services,  up to the amount paid by Customer for
Products or Services  provided  hereunder;  PROVIDED  THAT Customer (1) promptly
notifies IBM, in writing,  of the charge of  infringement;  or (2) allows IBM to
control  and  cooperates  with IBM in the  defense  and any  related  settlement
action;  and (3) upon the  written  request  of IBM (a)  allows IBM to modify or
replace the  Product,  or (b)  returns the Product to IBM for a credit  equal to
Customer's  purchase  price for the  Product,  provided  Customer  has  followed
generally accepted accounting principles. Such indemnification does not apply to
a claim of infringement involving any Product sold or Service provided by IBM to
Customer  which has been  modified by  Customer,  used in  combination  with any
product  not sold by IBM to  Customer,  or made,  modified or provided by IBM in
compliance  with Customer's  specification(s).  Customer agrees to indemnify IBM
against all damages and costs resulting from such a claim of  infringement.  The
foregoing states the entire  obligation and exclusive remedy of IBM and Customer
regarding any claim of patent or copyright  infringement relating to any Product
sold or  Service  provided  hereunder.  

10.2 Customer warrants that it is the originator,  rightful owner or licensee of
all Items supplied to IBM hereunder and that to the best of Customer's knowledge
no part of such Items infringes any intellectual property rights.

11.0 LIMITATION OF LIABILITY

11.1 Neither party shall be entitled to indirect,  incidental,  consequential or
punitive  damages,  including lost profits based on any breach or default of the
other party,  including those arising from infringement or alleged  infringement
of any  patent,  trademark,  copyright,  mask  work,  or any other  intellectual
property.

11.2 Except for  nonpayment,  no action,  regardless of form,  arising from this
Agreement  may be brought by either party more than one (1) year after the cause
of action has arisen.  IBM's liability for any and all causes of action shall be
limited in the aggregate to the greater of: (1) $50,000.00 or (2) the applicable
IBM price to Customer for the specific  Products and/or Services that caused the
damages or that are the subject matter of, or directly  related to, the cause of
action.

11.3 The limitation of Section 11.2 does not apply to: (1) payments  referred to
in Section 10.1 and (2) damages for bodily injury  (including  death) and damage
to real property and tangible personal property caused by IBM's negligence.

11.4 Under no  circumstances  is IBM liable for any of the following:  (A) third
party claims against  Customer for losses or damages other than those in 11.3(1)
and (2) above;  or (B) loss of, or damage  to,  Customer's  or another  parties'
records  or  data;  or (C)  when  the  Products  and/or  Services  are  used  in
conjunction with medical devices or nuclear materials.

12.0  WARRANTIES

                                       4



12.1  IBM  warrants  all  Products  delivered  hereunder  shall  conform  to the
specifications  set forth in Part A of the  applicable  Attachment  and shall be
free from defects in material and  workmanship for a period of one (1) year from
the date of shipment unless otherwise stated in an Attachment applicable to such
Products. Customer acknowledges that the functionality of Products is contingent
on  Customer's  designs  and,  therefore,  such  warranty  does not apply to the
functionality of Products  fabricated  under this Agreement.  All Prototypes are
provided "As Is" without warranty of any kind.

12.2 THE  FOREGOING  WARRANTY  IS IN LIEU OF ALL OTHER  WARRANTIES,  EXPRESS  OR
IMPLIED,  INCLUDING THE IMPLIED WARRANTY OF  MERCHANTABILITY OR FITNESS OR USAGE
FOR PARTICULAR PURPOSE.

12.3 No course of dealing, course of performance, usage of trade, or description
of  Product,  Prototype  or Service  shall be deemed to  establish  a  warranty,
express or implied.

12.4 If Customer  claims  that any  Products  and any  incidental  Services  are
nonconforming,  Customer shall (1) promptly notify IBM, in writing, of the basis
for such  nonconformity;  (2) follow  IBM's  instructions  for the return of the
Products;  and (3) return  such  Products  freight  collect to IBM's  designated
facility.  If IBM  determines the Products are  nonconforming,  IBM will, at its
option,  repair or replace the defective  Products,  or issue a credit or rebate
for the purchase price.

12.5 IBM's sole  liability  and  Customer's  sole  remedy for breach of warranty
shall be limited as stated in this Section 12.

13.0 TAXES

13.1 IBM shall bill Customer for all  applicable  sales,  use and gross receipts
taxes, unless Customer provides IBM with appropriate exemption certificates.

14.0 NOTICES

14.1  All  communications  and  notices  between  the  parties  concerning  this
Agreement shall be given to the appropriate  individual listed in the applicable
Attachment  and  shall  be  deemed  sufficiently  made on the  date if  given by
personal  service,  sent via mail,  facsimile or  electronic  data  interchange.
Communication  by facsimile or electronic  data  interchange  is acceptable as a
"writing".  The  autographs of  representatives  of the parties,  as received by
facsimile  or  electronic  data   interchange,   shall   constitute   "original"
signatures.

15.0 INDEPENDENCE OF ACTION

15.1 Each party agrees that this Agreement will not restrict the right of either
party to enter into  agreements  with other parties for same or similar work, or
to make, have made, use, sell, buy,  develop,  market or otherwise  transfer any
products or services, now or in the future, so long as confidential  information
is not disclosed.  IBM shall not sell, market or otherwise transfer to any third
party any Products  using the trademark or trade name of Customer  without prior
written consent.

16.0 This Section Reserved.

17.0 GENERAL

17.1 Neither party shall be responsible  for failure to fulfill its  obligations
under this  Agreement  due to fire,  flood,  war or other such cause  beyond its
reasonable control and without its fault or negligence (excluding labor disputes
or payment obligations) provided it promptly notifies the other party.

17.2 The substantive laws of the State of New York govern this Agreement without
regard to conflict of law principles. Both parties agree to waive their right to
a jury trial in any dispute  arising out of this  Agreement and agree any action
concerning this Agreement shall be brought in a court of competent  jurisdiction
in the State of New York.

17.3 Neither party may assign its rights  (except that IBM may assign its rights
for payment) or delegate or subcontract its duties  hereunder  without the

                                       5



prior  written  consent of the other party,  except that either party may freely
assign its rights or  delegate or  subcontract  its duties  hereunder  if all or
substantially  all of the  assets  of the  business  unit  connected  with  this
Agreement are sold or otherwise transferred to a third party.

17.4 No delay or  failure  by  either  party to act in the  event of a breach or
default  hereunder  shall be  construed  as a waiver  of that or any  subsequent
breach or default of any provision of this Agreement.

17.5 If any part,  term or provision of this  Agreement is declared  unlawful or
unenforceable,  by judicial determination or performance,  the remainder of this
Agreement shall remain in full force and effect.

17.6 Any terms of this Agreement which by their nature extend beyond  expiration
or  termination  of this  Agreement  shall remain in effect until  fulfilled and
shall bind the parties and their legal  representatives,  successors,  heirs and
assigns.

17.7 The headings  contained in this  Agreement are for reference  purposes only
and shall not affect in any way the meaning or interpretation of this Agreement.

17.8 Each party will comply,  at its own expense,  with all applicable  federal,
state and local laws, regulations and ordinances including,  but not limited to,
the  regulations  of the U.S.  Government  relating  to  export  and  re-export.
Customer  agrees  that  it is  responsible  for  obtaining  required  government
documents and approvals prior to export and re-export of any commodity, machine,
software or technical data.

17.9 The UN Convention on Contracts  for the  International  Sale of Goods shall
not apply to this Agreement.


                                 Signature Copy
                                Attachment No. 1
                       Integrated Device Technology, Inc.
Custom Sales Agreement X0718                        IDTSow7.lwp 

         Page 1 of Semiconductor Contract Manufacturing Attachment No. 1
Custom Sales Agreement No. X0718

When signed by the  parties  below,  the  following  Statement  of Work shall be
incorporated into Custom Sales Agreement No. X0718 as Attachment No. 1 effective
on January 19, 1998. Attachments are governed by the terms and conditions of the
Base Agreement.

                                Statement of Work
                  CUSTOM SEMICONDUCTOR MANUFACTURING TASK ORDER

Definitions

"Wafer Acceptance Criteria" means the engineering specifications,  referenced in
Part A of this Statement of Work, which sets forth the technology parameters and
physical criteria to which the Product will conform at the time of delivery.

1.0 Scope of Work

1.1 IBM will  manufacture  photomasks and Products in accordance  with Part A of
this Statement of Work.

1.2 Subject to the terms and conditions of this Statement of Work, Customer will
provide IBM with the  Customer's  Items and cooperate  with IBM to enable IBM to
perform foundry services in accordance with this Agreement.

1.3 Customer may, at any time and from time to time,  by written  notice to IBM,
request  changes to the part numbers,  specifications,  or work scope.  IBM will
submit a written report to Customer setting forth the probable  effect,  if any,

                                       6



of such requested change on prices,  payment or delivery.  IBM shall not proceed
with any change  until  authorized  in writing by  Customer.  The parties  shall
promptly amend this Attachment to incorporate any agreed changes.

1.4 IBM may  implement  engineering  changes  required  to satisfy  governmental
standards, protect Product or system integrity, or for environmental,  health or
safety reasons. Customer will use reasonable efforts to incorporate such changes
in Products already shipped by IBM. IBM may implement  engineering  changes that
result in cost reductions to Product with prior approval of Customer, which will
not be unreasonably withheld.

2.0 Forecasting

Initial  Forecast.   Each  Attachment  shall  contain  an  initial  forecast  of
Customer's anticipated unit production demand requirements for Product(s) for at
least the twelve  (12)  month  period  immediately  following  execution  of the
Attachment.  The initial  forecast will not become binding on either party until
Customer  submits the first purchase order for Product  pursuant to Section 3 of
this Attachment.  The first purchase order shall, at a minimum,  cover the first
four (4) months of the twelve (12) month forecast.

Subsequent  Forecasts.  Customer shall provide an updated forecast in writing to
IBM,  on a  monthly  basis by no later  than the fifth  (5th) day of each  month
during  the term of the  Attachment.  Each such  forecast  will cover at least a
rolling  twelve (12) month  period (not to exceed the term of this  Attachment),
and will be reviewed for acceptance by IBM.  Within ten (10) business days after
receipt IBM shall notify  Customer with written  notice of whether such forecast
has been accepted or rejected.

With each updated forecast  Customer shall submit a purchase order ( pursuant to
Section 3). This purchase  order shall be for the quantity of Products  forecast
for the fourth (4th) month of the rolling forecast (months one (1) through three
(3) having already been committed under purchase  order(s)  pursuant to previous
forecast(s)).  Customer  agrees that if it does not submit  purchase  orders for
accepted forecasts,  as discussed in Section 6 of the Attachment,  then Customer
shall be subject to the  cancellation  charges  described  there.  All  purchase
orders submitted are subject to the terms of Section 4.0 of the Agreement.

IBM will accept  purchase  orders for months _*_ of any  forecast,  provided the
forecast  has been  accepted by IBM,  the orders are placed in  accordance  with
Section 3 and the quantities  requested are within _*_ the  previously  accepted
forecast for said months or if Customer's orders constitute less than an average
of _*_ wafer starts per day averaged over the three (3) previous  month(s),  IBM
will accept  purchase  orders for quantities up to _*_ of previously  forecasted
quantities for such month(s).

IBM will accept  purchase  orders for months _*_  provided the forecast has been
accepted by IBM.  Customer  shall pay no  cancellation  charge for a decrease in
forecasted quantities for months _*_.

3.0 Orders

After the parties have executed an Attachment, Customer will request delivery of
Products  by issuing  written  purchase  orders to IBM by the fifth (5th) day of
each calendar month. As set forth in Section 2, Customer will maintain a minimum
of four  (4)  months  rolling  purchase  orders  on IBM and may  place  purchase
order(s) for months five (5) and six (6) of each forecast.  Purchase  orders are
subject to, and IBM will  accept and ship  against  purchase  orders that comply
with,  the terms and  conditions of the Agreement and this  Attachment,  and are

- ---------
  [* Confidential   treatment  has  been   requested  with  respect  to  certain
     information  contained  within this  document.  Confidential  portions  are
     omitted and filed  separately  with the Securities and Exchange  Commission
     pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended.]


                                       7



consistent  with the  most  recently  accepted  forecasts  and the  most  recent
Customer credit limit as granted by IBM.

Customer will request delivery of Products by issuing written purchase orders to
the IBM ordering location identified in Section 7.0 of this Attachment. Purchase
orders shall only specify:

a)  Customer's purchase order number
b)  Customer's tax status - exempt or non-exempt
c)  ship to location - complete address
d)  bill to location - complete address
e)  order from location - complete address
f)  NRE Services and/or Product part numbers and quantities being ordered
         (in increments of the Minimum Order Quantity ("MOQ");
g)  NRE Charges and/or the Product's applicable unit price;
h)  shipping instructions, including preferred carrier.
i)  requested shipment dates
j)  the Agreement Number of this Agreement.
k)  Name of customer contact.

4.0      Customer Product Requirements

4.1      Technology:                CMOS _*_

4.2      Levels of metal:           5

4.3      Special features:          Salicide block
                                    Fuse Blow

4.4      Test time:                 TBD (two pass testing required)

4.5      Package:                   Not applicable

5.0      Delivery

5.1 Product:  The Purchase Order Lead Time for the Products  and/or  Services is
nine (9) weeks after receipt of Customer's Purchase Order.

5.2  Prototypes:  The lead  time will  forty-five  (45) days  after  receipt  of
Customer's Purchase Order or the receipt of the DRC clean GDS II tape, whichever
is received later.

6.0 Pricing

Customer agrees to pay the following prices for NRE Services:

6.1 Services
6.1.1 Mask build and  Prototype  delivery                          _*_
        - Design center  technical and
           logistical support 
        - Manufacturing  slot and 2 prototype wafer
        - CMOS _*_ design groundrules
        - Processing of the GDSII tape 
        - Mask build (_*_ masks)

6.1.2 Wafer Test
        -  _*_                                                     _*_
        -  Cantilever probes                                       _*_
        -  Fuse blow debug                                         _*_

6.1.3 SUBSEQUENT METAL PERSONALIZATION REVISIONS
        -  Engineering charge per revision                         _*_
        -  Per mask charge                                         _*_

6.2   Payment Schedule:

      Subject to credit  terms  granted  to  Customer  by IBM,  
        NRE  services  will be invoiced as follows: 
        - 50% with purchase  order  placement by Customer 
        - 50% on the date of shipment or completion
              of the NRE service

6.3   Price Quantity Matrix:
6.3.1 Prototype wafer pricing:
        - up to 12 untested wafers                                 _*_ /wafer

6.3.2 Product unit pricing:
        _*_
6.3.3 Wafer test
        _*_
        Test time is TBD, _*_
        Fuse Blow:  _*_/wafer
        Minimum Order quantity: _*_ per shipment
        Minimum Shipment quantity _*_ per shipment


7.0 Cancellation Charges

In accordance with Section 4 of the Base Agreement,  the following  charges will
apply for failure to order against accepted forecasts and any cancelled Customer
order or portion  thereof.  The  "Cancellation  Charge" referred to below is the
percentage  to be  applied  to the  prices  stated  above in  Section  5 of this
Attachment.

         a) For a purchase  order which is more than thirty (30) days,  but less
than sixty (60) days, from its scheduled shipment date,  Customer may request in
writing a one-time deferral of the scheduled  shipment date not to exceed thirty
(30) days, with no cancellation charge imposed.

         b) If  Customer  cancels an order or  reduces  an order or exceeds  the
foregoing  Product  shipment  rescheduling  rights in this  Section 6,  Customer
agrees to pay the Product cancellation charges as described below.

         Canceled or Changed Forecast

- ---------
  [* Confidential   treatment  has  been   requested  with  respect  to  certain
     information  contained  within this  document.  Confidential  portions  are
     omitted and filed  separately  with the Securities and Exchange  Commission
     pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended.]

                                       8



         a) If  Customer  fails to order  forecasted  quantities  of Product for
months _*_ of any accepted forecast, as described in Section 2 of the Agreement,
Customer  will pay _*_ of the wafer price for all Product  that was not ordered;
however,  there shall be no charge for a given month if Customer orders at least
_*_ of the forecasted  quantities listed in the most recently accepted forecast,
for that month.

Canceled or Changed Purchase Orders

         a) If any  purchase  order  is  canceled  prior to  wafer  start  date,
Customer shall pay _*_ of the wafer price,

         b) If any purchase order is canceled after wafer start,  Customer shall
pay _*_ of wafer price.

8.0 Ordering Location, Ship To / Bill To

IBM Ordering Location:              Ship To:                 Bill To:
         International Business     Per Purchase Order       Per Purchase Order
         Machines Corporation
         1055 Joaquin Rd.
         Mountain View, CA 94043

         Attention:  Michele Young
         Fax:     415-694-3157

9.0 Coordinators/Administrators

Technical Coordinators:

Integrated Device Technology, Inc.                  IBM Microelectronics
Director of Foundry Operations
2975 Stender Way                                    I000 River Street
Santa Clara, California 95054                       Essex Junction, VT 05452

FAX:  408-456-2458                                  FAX: 802-769-6206
Attn:  Gary Kennedy                                 Attn:  Mike Schwartz


Contract Administrators:

Integrated Device Technology, Inc.                  IBM Microelectronics
Director of Foundry Operations
2975 Stender Way                                    I000 River Street
Santa Clara, California 95054                       Essex Junction, VT 05452

FAX:  408-456-2458                                  FAX: 802-769-2441
Attn:  Gary Kennedy                                 Attn:  April Johnson

10. Unique Terms and Conditions

The following  terms and  conditions  are  applicable to this  Attachment  only.
Referring to the Base Agreement:

         Not applicable.


Agreed to:                                   Agreed to:

- ---------
  [* Confidential   treatment  has  been   requested  with  respect  to  certain
     information  contained  within this  document.  Confidential  portions  are
     omitted and filed  separately  with the Securities and Exchange  Commission
     pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended.]


                                       9



INTERNATIONAL BUSINESS                      INTEGRATED DEVICE TECHNOLOGY, INC.
MACHINES CORPORATION


By:      _________________________          By:   ______________________________
         Authorized Signature                        Authorized Signature

         Peter Hansen                                Len Perham
         V. P. of North American Sales               CEO and President

         Dated:                                      Dated:


Part A

1.0 PRODUCT NAME AND DESCRIPTION:

         Centaur Microprocessor


2.0 PRODUCT SPECIFICATIONS:

         IBM will process the IDT design for the Centaur  Microprocessor  in the
IBM CMOS _*_ technology based on Engineering Specification #08J1973.


3.0 CUSTOMER'S ITEMS:

3.1 Technology:                CMOS _*_

3.2 Levels of metal:           5

3.3 Special features:          Salicide block
                               Fuse Blow

3.4 Test time:                 TBD (_*_ testing required)


4.0 PRODUCT DEMAND FORECAST:

         Wafers

Year: 1998

Month: Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec.
        *    *    *     *     *   *    *    *    *     *    *    *  
       ---  ---  ---   ---   --- ---  ---  ---  ---   ---  ---  ---

Exhibit A

Wafer Acceptance Criteria (for tested wafers)


1. Nothing in this Exhibit modifies or expands Customer's  warranty rights under
the Agreement.

- ---------
  [* Confidential   treatment  has  been   requested  with  respect  to  certain
     information  contained  within this  document.  Confidential  portions  are
     omitted and filed  separately  with the Securities and Exchange  Commission
     pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended.]


                                       10



2. IBM  Products,  with the  reasonable  cooperation  of the  Customer,  will be
subject to the following quality standards.

A) Wafer Specifications

a. Wafer Size: IBM will ship 8 inch diameter wafers.

b. Wafer Thickness and Finish:  IBM and Customer will agree upon  specifications
for wafer thickness and back finish.

c. Die Layout:  IBM will be  responsible  for the reticle layout and stepping of
the Customer's die, consistent with IBM's normal defect monitoring strategy.

d. Packing:

         1. Tested  wafers:  Tested wafers will be shipped in  containers  using
shipping  methods  approved  by  the  Customer,   which  approval  will  not  be
unreasonably withheld.

         2. Damaged Goods:  The Customer will provide feedback on wafers damaged
during  transit  which are  related to  inadequate  packing.  IBM will then take
reasonable  corrective  action if the damages  were caused by IBM.  Customer may
return the wafer using IBM's RMA process.

B) Wafer Yields:

a. Circuit  limited yield loss is solely the  responsibility  of the Customer so
long as IBM  manufactures  the Product in  accordance  with the CMOS _*_ process
technology's  process  parameters  as defined  by the SPICE  decks.  b.  Minimum
Yields:  Wafers with process yields less than _*_ of the wafer target yield will
not be shipped, unless agreed to in writing by the Customer.

C)  Visual  Criteria:  The  Customer's  production  Product  will meet the IBM's
outgoing wafer  inspection  criteria  including wafer warpage,  thickness,  back
finish,  passivation  integrity,  visual defect inspection  criteria and packing
integrity.

D) Electrical Criteria:

a. Parametrics:  Product will be screened via parametric test probe scribe level
sample testing. This is consistent with IBM's active Statistical Process Control
program for the purposes of  controlling  and reducing  the  variability  of key
device  parametrics  including  voltage  thresholds,  breakdown  voltages,  poly
lengths and drive currents.  For products that require special  processing (e.g.
split lots), IBM and Customer will reasonably agree in writing,  in advance,  on
the data to be collected.

E) Prototypes:

a. Prototypes and other similar non-production  material will be accepted by the
Customer and may not meet the quality criteria  described  herein.  Customer may
not use this material for production shipments.

F) Documentation:

a. In order to assist in yield,  performance  and  reliability  problem  solving
efforts,  wafer lot  documentation  can be made  available to the Customer  upon
Customer's written request.  Documentation that is available includes, a listing
of the  parametric  test  probe  data,  wafer lot ID,  device ID,  total  wafers
shipped,  wafer  thickness,  and when  applicable,  special notices of exception

- ---------
  [* Confidential   treatment  has  been   requested  with  respect  to  certain
     information  contained  within this  document.  Confidential  portions  are
     omitted and filed  separately  with the Securities and Exchange  Commission
     pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended.]

                                       11



and/or comment (for example,  non-standard  processing,  non-production  status,
special instructions, etc.).

G) Test:  Electrical test using functional,  scan and memory based tests will be
done as reasonably  mutually agreed between IBM and Customer.  The details to be
identified after the completion of the first prototype wafers.


- ---------
  [* Confidential   treatment  has  been   requested  with  respect  to  certain
     information  contained  within this  document.  Confidential  portions  are
     omitted and filed  separately  with the Securities and Exchange  Commission
     pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended.]


                                       12