PMC SIERRA INC
10-Q, 1998-08-12
SEMICONDUCTORS & RELATED DEVICES
Previous: SEROLOGICALS CORP, 10-Q, 1998-08-12
Next: SUBURBAN BANCSHARES INC, 10-Q, 1998-08-12



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

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549
                                   Form 10 - Q

             [X] Quarterly Report Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

                  for the quarterly period ended June 28, 1998

             [ ] Transition report pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934.
                                      

                     For the Transition Period From __ to __

                         Commission File Number 0-19084

                                PMC-Sierra, Inc.
             (Exact name of registrant as specified in its charter)

                 A Delaware Corporation - I.R.S. NO. 94-2925073

                              105-8555 BAXTER PLACE
                       BURNABY, BRITISH COLUMBIA, V5A 4V7
                                     CANADA

                            Telephone (604) 415-6000

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such period that the  registrant was required to
file such reports), and (2) has been subject to such filing requirements for the
past 90 days.

                             Yes ___X____ No _______


             Common shares outstanding at June 28, 1998 - 30,672,754

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


<PAGE>




                                      INDEX


                                                                        Page

PART I - FINANCIAL INFORMATION

Item 1.             Financial Statements                              
                                                                      
             -      Consolidated statements of operations             
                                                                      
             -      Consolidated balance sheets                       
                                                                      
             -      Consolidated statements of cash flows             
                                                                      
             -      Notes to consolidated financial statements        

Item 2.      Management's Discussion and Analysis of Financial     
             Condition and Results of Operations                      

PART II - OTHER INFORMATION                                     

Item 2.      Changes in Securities and Use of Proceeds                
                                                                   
Item 4.      Submission of Matters to a Vote by Stockholders          
                                                                   
Item 5.      Other Information - Description of Capital Stock         
                                                                   
Item 6.      Exhibits and Reports on Form 8 - K                       
                                                              

<PAGE>

                         Part I - FINANCIAL INFORMATION

                         Item 1 - FINANCIAL STATEMENTS

<TABLE>
                                               PMC-Sierra, Inc.
                                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                  (in thousands, except for per share amounts)
                                                   (unaudited)

<CAPTION>
                                                             Three Months Ended            Six Months Ended
                                                        ---------------------------   --------------------------
                                                           Jun 28,       Jun 30,         Jun 28,       Jun 30,
                                                             1998          1997            1998          1997

<S>                                                     <C>           <C>             <C>           <C>        
Net revenues                                            $     39,975  $     34,064    $    74,270   $    67,638

Cost of revenues                                               9,895         9,613         18,030        19,464 
                                                        ------------- -------------   ------------  ------------
   Gross profit                                               30,080        24,451         56,240        48,174 
                                                                                                                
Other costs and expenses:                                                                                       
   Research and development                                    7,820         5,308         13,836        11,348 
   Acquisition of in process research and development         50,846             -         50,846             - 
   Marketing, general and administrative                       7,348         6,614         13,470        12,915 
                                                        ------------- -------------   ------------  ------------
Income (loss) from  operations                               (35,934)       12,529        (21,912)       23,911 
                                                                                                                
Interest income, net                                             750           232          1,574           157 
                                                        ------------- -------------   ------------  ------------
Income (loss) before provision for income taxes              (35,184)       12,761        (20,338)       24,068 
                                                                                                                
Provision for income taxes                                     5,639         3,829         10,836         6,656 
                                                        ------------- -------------   ------------  ------------
Net income (loss)                                       $    (40,823) $      8,932    $   (31,174)  $    17,412
                                                        ============= =============   ============  ============

Basic net income (loss) per share                       $      (1.28) $       0.29    $     (0.98)  $      0.56
                                                        ============= =============   ============  ============

Diluted net income (loss) per share                     $      (1.28) $       0.28    $     (0.98)  $      0.54
                                                        ============= =============   ============  ============

Shares used to calculate:
   Basic net income (loss) per share                          31,829        30,918         31,677        30,846
   Diluted net income (loss)  per share                       31,829        32,374         31,677        32,135


See notes to consolidated financial statements.
</TABLE>

<PAGE>
<TABLE>
                         
                                PMC-Sierra, Inc.
                           CONSOLIDATED BALANCE SHEETS
                                 (in thousands)
<CAPTION>

                                                                                 Jun 28,        Dec 28,
                                                                                  1998            1997
                                                                              (unaudited)

<S>                                                                          <C>              <C>     
ASSETS:
Current assets:
   Cash and cash equivalents                                                 $     60,872   $     27,906
   Short-term investments                                                               -         41,334
   Accounts receivable, net                                                        20,858         15,103
   Inventories                                                                      6,212          3,199
   Prepaid expenses and other current assets                                        3,986          1,958
   Short-term deposits for wafer fabrication capacity                                   -          4,000
                                                                             -------------  -------------
      Total current assets                                                         91,928         93,500

Property and equipment, net                                                        26,430         19,699
Goodwill and other intangible assets,  net                                         14,626          8,635
Investments and other assets                                                        4,517          4,424
Deposits for wafer fabrication capacity                                            23,120         23,120
                                                                             -------------  -------------
                                                                             $    160,621   $    149,378
                                                                             =============  =============

LIABILITIES AND SHAREHOLDERS' EQUITY:
Current liabilities:
   Accounts payable                                                          $      9,434   $      7,421
   Accrued liabilities                                                             22,454         13,751
   Accrued income taxes                                                            10,154          8,780
   Current portion of obligations under capital leases and long-term debt           5,093          4,652
   Net liabilities of discontinued operations                                         249            301
                                                                             -------------  -------------
      Total current liabilities                                                    47,384         34,905

Deferred income taxes                                                               3,958          4,023
Noncurrent obligations under capital leases and long-term debt                      7,645          9,092

Special shares convertible into PMC common stock                                    8,758         10,793

Shareholders' equity:
   Common stock, par value $0.001                                                      30             30
   Additional paid in capital                                                     176,638        143,153
   Accumulated deficit                                                            (83,792)       (52,618)
                                                                             -------------  -------------
      Total shareholders' equity                                                   92,876         90,565
                                                                             -------------  -------------
                                                                             $    160,621   $    149,378
                                                                             =============  =============

See notes to consolidated financial statements.

</TABLE>

<PAGE>
<TABLE>
                                PMC-Sierra, Inc.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)
<CAPTION>

                                                                                  Six Months Ended
                                                                             --------------------------
                                                                                Jun 28,       Jun 30,
                                                                                 1998          1997
<S>                                                                          <C>           <C>        
Cash flows from operating activities:
   Net income (loss)                                                         $   (31,174)  $    17,412
   Adjustments to reconcile net income to net cash
   provided by operating activities:
     Depreciation and amortization                                                 5,359         4,088
     Acquisition of in process research and development                           50,846             -
     Changes in assets and liabilities
       Accounts receivable                                                        (4,492)       (3,048)
       Inventories                                                                (2,458)        5,221
       Prepaid expenses and other                                                 (1,754)       (1,533)
       Accounts payable and accrued expenses                                       8,925         1,838
       Accrued restructuring costs                                                     -        (7,569)
       Net assets/liabilities associated with discontinued operations                (52)         (160)
                                                                             ------------  ------------
         Net cash provided by operating activities                                25,200        16,249
                                                                             ------------  ------------

Cash flows from investing activities:
   Proceeds from sales/maturities of short-term investments                       43,442        12,039
   Purchases of short-term investments                                            (2,108)      (19,138)
   Proceeds from refund of wafer fabrication deposits                              4,000             -
   Investments in other companies                                                      -        (3,000)
   Payment for purchase of Integrated Telecom Technology, Inc.,
     net of cash acquired                                                        (27,165)            -
   Purchase of other in process research and development                          (1,419)            -
   Proceeds from sale of equipment                                                     -         2,483
   Purchases of plant and equipment                                               (9,636)       (3,303)
                                                                             ------------  ------------
         Net cash provided by (used in) investing activities                       7,114       (10,919)
                                                                             ------------  ------------

Cash flows from financing activities:
   Repayment of notes payable and long-term debt                                    (116)       (1,157)
   Proceeds from sale/leaseback of equipment                                           -         1,107
   Principal payments under capital lease obligations                             (2,461)       (2,004)
   Proceeds from issuance of common stock                                          3,229         2,530
                                                                             ------------  ------------
         Net cash provided by financing activities                                   652           476
                                                                             ------------  ------------

Net increase in cash and cash equivalents                                         32,966         5,806
Cash and cash equivalents, beginning of the period                                27,906        35,038
                                                                             ------------  ------------
Cash and cash equivalents, end of the period                                 $    60,872   $    40,844
                                                                             ============  ============

See notes to consolidated financial statements.

</TABLE>

                                PMC-SIERRA, INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.   The accompanying  financial  statements have been prepared  pursuant to the
     rules and  regulations of the Securities and Exchange  Commission  ("SEC").
     Certain  information and footnote  disclosures  normally included in annual
     financial   statements  prepared  in  accordance  with  generally  accepted
     accounting  principles  have been  condensed  or omitted  pursuant to those
     rules or regulations.  The interim financial statements are unaudited,  but
     reflect all adjustments which are, in the opinion of management,  necessary
     to present a fair statement of results for the interim  periods  presented.
     These financial statements should be read in conjunction with the financial
     statements  and the notes  thereto in the  Company's  Annual Report on Form
     10-K for the year ended  December 28, 1997.  The results of operations  for
     the three and six months ended June 28, 1998 are not necessarily indicative
     of results to be expected in future periods.

2.   On May 20, 1998, the Company acquired Integrated Telecom  Technology,  Inc.
     ("IGT") in exchange for total  consideration of $55.0 million consisting of
     cash paid to IGT stockholders of $17.8 million,  cash paid to IGT creditors
     of $9.0 million and the issuance of approximately  415,000 shares of common
     stock and options to purchase approximately 214,000 shares of common stock.
     The purchase price includes professional fees and other direct costs of the
     acquisition  totaling  $850,000.  IGT is a  fabless  semiconductor  company
     headquartered in Gaithersburg,  MD with a development site in San Jose, CA.
     IGT makes Asynchronous Transfer Mode (ATM) switching chipsets for wide area
     network applications as well as ATM  Segmentation-and-Reassembly  and other
     telecommunication chips.

     The  acquisition  was recorded under the purchase  method of accounting and
     the results of operations of IGT and the fair value of acquired  assets and
     liabilities were included in the Company's financial  statements  beginning
     on the acquisition  date. Upon  consummation  of the  transaction,  IGT was
     merged with a wholly owned  subsidiary of the Company.  In connection  with
     the purchase  price  allocation,  the Company  received an appraisal of the
     intangible assets which indicated that  approximately  $49.4 million of the
     purchase  price was  allocated  to  in-process  research  and  development.
     Because  there  can be no  assurance  that  the  Company  will  be  able to
     successfully  complete the  development  and integration of IGT products or
     that the acquired  technology has any alternative  future use, the acquired
     in process  research and development was expensed in the three months ended
     June 28, 1998. In addition,  the Company has recorded $5.3 million  related
     to other  intangible  assets,  which will be amortized over their estimated
     useful lives,  ranging from three to seven years.  The Company  presented a
     pro forma  summary of this  purchase  acquisition  on a Form 8-K/A filed on
     June 22, 1998.

<PAGE>

     The following  table presents the unaudited pro forma results of operations
     for  informational  purposes  assuming that the Company had acquired IGT at
     the beginning of the 1998 and 1997 fiscal years.  This  information may not
     necessarily be indicative of the future  combined  results of operations of
     the Company.

                                                           Six Months Ended    
                                                      -------------------------
                                                        June 28,      June 30,
                                                          1998          1997
        (in thousands, except for per share amounts)
        
        Net revenues                                   $ 78,579      $ 74,305
        
        Net income                                     $ 15,431      $ 15,209
        
        Basic net income per share:                    $   0.48      $   0.49
        
        Diluted net income per share:                  $   0.45      $   0.46


     The pro forma  results of  operations  give effect to certain  adjustments,
     including  amortization of purchased  intangibles  and goodwill.  The $49.4
     million  charge for purchased in process  technology has been excluded from
     the pro forma results, as it is a material non-recurring charge.

3.   On May 1, 1998 a subsidiary of the Company acquired certain  technology for
     cash  consideration  of $1.4  million.  This  technology  has  not  reached
     technological  feasibility and has no alternative future use.  Accordingly,
     this amount is included in the in process research and development expensed
     in the three months ended June 28, 1998.

4.   The components of inventories are as follows (in thousands):

                                           Jun 28,         Dec 28,
                                            1998            1997
                                        (unaudited)

Work-in-progress                         $     2,103     $     2,316
Finished goods                                 4,109             883
                                       --------------  --------------
                                         $     6,212     $     3,199
                                       ==============  ==============


<PAGE>

5. Recently Issued Accounting Standards

- -    Effective  January 1, 1998,  the Company  adopted  Statement  of Financial
     Accounting  Standards ("SFAS") No. 130, "Reporting  Comprehensive  Income".
     SFAS No. 130 requires disclosure of comprehensive income in interim periods
     and additional  disclosures of the components of comprehensive income on an
     annual basis.  Comprehensive income includes all changes in equity during a
     period except those resulting from investments by and  distributions to the
     Company's  shareholders.  For the quarters ended June 28, 1998 and June 30,
     1997,   there  were  no  material   differences   between   the   Company's
     comprehensive income and net income.

- -    In June 1997, the Financial Accounting Standards Board issued Statement of
     Financial Accounting  Standards No. 131,  "Disclosures about Segments of an
     Enterprise and Related  Information",  which establishes annual and interim
     reporting  standards  for an  enterprise's  business  segments  and related
     disclosures  about  its  products,  services,  geographic  areas  and major
     customers.  Adoption  of this  statement  will  not  impact  the  Company's
     consolidated  financial position,  results of operations or cash flows. The
     Company will adopt this statement in its financial  statements for the year
     ending December 27, 1998.


<PAGE>

Item 2.       MANAGEMENT'S DISCUSSION AND ANALYSIS OF
              FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The  following  discussion  should  be read in  conjunction  with the  unaudited
consolidated  financial statements and notes thereto included in Part I - Item 1
of this Quarterly Report and the audited  consolidated  financial statements and
notes thereto and  Management's  Discussion  and Analysis in the Company's  1997
Annual Report to Shareholders.

During the second quarter,  the Company acquired  Integrated Telecom Technology,
Inc. ("IGT") in exchange for total  consideration of $55.0 million consisting of
cash paid to IGT  shareholders  of $17.8 million,  cash paid to IGT creditors of
$9.0 million and the issuance of  approximately  415,000  shares of common stock
and options to purchase  approximately  214,000 shares of common stock. IGT is a
fabless  semiconductor   company  headquartered  in  Gaithersburg,   MD  with  a
development site in San Jose,  California.  IGT makes Asynchronous Transfer Mode
(ATM)  switching  chipsets  for wide area  network  applications  as well as ATM
Segmentation-and-Reassembly   and  other   telecommunication   chips.   The  IGT
acquisition was recorded under the purchase method of accounting and the results
of operations of IGT and the fair value of acquired assets and liabilities  were
included in the Company's  financial  statements  beginning on May 20, 1998, the
acquisition  date.  Approximately  $49.4  million  of  the  purchase  price  was
allocated to in process research and development which was expensed in the three
months ended June 28, 1998.  The Company  presented a pro forma  summary of this
purchase acquisition on a Form 8-K/A filed on June 22, 1998.

Certain statements in this Report constitute  "forward-looking  statements" with
the meaning of the federal securities laws. The actual results,  performance, or
achievements of the Company may be materially  different from those expressed or
implied by such  forward-looking  statements.  Reference to the Company includes
its  subsidiary   PMC-Sierra   Ltd.,  a  Canadian   corporation  and  its  other
subsidiaries.  The forward-looking  statements include  projections  relating to
trends in markets,  revenues,  particularly  expectations of long-term revenues,
gross margin,  and future  expenditures on research and development,  marketing,
general  and  administrative  expense  and the  year  2000  issue.  The  Company
undertakes no obligation to release revisions to  forward-looking  statements to
reflect subsequent events.

Results of Operations

Second Quarters of 1998 and 1997

Net Revenues ($000,000)
- -----------------------
                                 Second Quarter
                           ---------------------------
                              1998           1997           Change
Net revenues
Networking products              $32.6          $21.3         53%
User Interface                     7.4           12.8       ( 42%)
                           ------------   ------------
Total net revenues               $40.0          $34.1         17%
                           ============   ============


Second quarter  networking product revenue increased 53% over last year's second
quarter.  During the second  quarter the  Company  acquired  Integrated  Telecom
Technology,  Inc.  ("IGT") which accounted for $1.3 million of the $32.6 million
in networking product revenue.
<PAGE>

User  interface  revenue  declined  42% in the second  quarter  compared to last
year's second  quarter.  All new product  development  related to user interface
products was discontinued  following a third quarter 1996 strategic  decision to
focus all of the Company's resources on networking products. Revenues related to
user  interface  products  are expected to decline  significantly  in the coming
quarter but continue at meaningful levels into 1999.


Gross Profit ($000,000)
- -----------------------
                                            Second Quarter
                                       ------------------------
                                           1998           1997      Change

Gross profit                               $30.1         $24.5        23%
   Percentage of net revenues                75%           72%


Gross profit  increased  in dollars and as a  percentage  of net revenues in the
second quarter  compared to the prior year's second quarter.  Increased sales of
higher  gross  margin  networking  products  more than offset a decline in gross
profit due to lower revenues from the Company's user interface products.

The Company expects that networking  gross profits as a percentage of networking
net revenues will decline if anticipated  decreases in average selling prices of
existing  networking  products  are not  offset by  commensurate  reductions  in
production  costs.  Gross margins  associated with IGT products are, on average,
lower than the Company's  internally  developed  networking  products but higher
than user interface products.

<PAGE>

Operating Expenses and Charges ($000,000)
- -----------------------------------------
                                               Second Quarter
                                          -----------------------
                                              1998        1997       Change

Research and development                       $7.8       $5.3        47%
Percentage of net revenues                      20%        16%

In process research and development           $50.8          -

Marketing, general & administrative            $7.3       $6.6        11%
Percentage of net revenues                      18%        19%


Research and development  ("R&D") spending of $7.8 million in the second quarter
of 1998 is up significantly over last year's second quarter, both in dollars and
as a percentage of net revenues.  In the near term the Company  expects  further
significant  increases in the percentage of net revenues devoted to R&D spending
in order to respond to the array of opportunities presented by the growth of the
internet and data networking in general, as well as the convergence of voice and
data communications.  Products developed by future incremental R&D spending will
be unlikely to result in incremental net revenues prior to the year 2000 because
of design and marketing lead times.

The Company incurs R&D expenditures in order to attain technological  leadership
from a multi-year perspective.  Such funding has resulted in fluctuations in R&D
spending  from  period  to  period  in  the  past.  The  Company   expects  such
fluctuations,  particularly  when measured as a percentage  of net revenues,  to
occur in the future,  primarily due to the timing of expenditures and changes in
the level of net revenues.

In process  research and development  expenses of $50.8 million were recorded in
the second quarter of 1998 with $49.4 million  related to the acquisition of IGT
and $1.4 million related to the acquisition of technology  which has not reached
technological feasibility and has no alternative future use.

Marketing,  general & administration  expenses were higher in the second quarter
of 1998 than the  comparable  period in 1997,  but lower as a percentage  of net
revenues.  A  substantial  portion  of  the  Company's   marketing,   general  &
administrative  expense is fixed in the short  term.  While it is the  Company's
long term goal to reduce  these costs as a  percentage  of net  revenues  during
periods of rising  sales,  a decline in net sales  could  cause  these  costs to
increase as a percentage of net revenues.

Interest Income (Expense), Net
- ------------------------------

Net interest  income  increased  to $750,000 in the second  quarter of 1998 from
$232,000 in last year's  second  quarter  primarily  due to higher cash balances
available  to invest and earn  interest  and reduced  interest  expense due to a
lower level of capital leases.

<PAGE>



Provision for Income Taxes
- --------------------------

The provision for income taxes consists primarily of estimated taxes on Canadian
and other foreign operations.


First Six Months of 1998 and 1997

Net Revenues ($000,000)
- -----------------------
                                       First six months
                                -------------------------------
                                    1998             1997           Change
Net revenues
Networking products                     $60.5            $36.8        64%
User Interface                           13.8             30.8       (55%)
                                --------------   --------------
Total net revenues                      $74.3            $67.6        10%
                                ==============   ==============


During the third quarter of 1996 the Company made a strategic  decision to focus
on  networking  products  and  to  discontinue  development  of  user  interface
products.  Accordingly, the total increase in net revenues for the first half of
1998  compared to the prior year is 10%.  Networking  products  grew from 54% of
total net  revenues  in the first half of 1997 to 81% in the first six months of
1998. All sales of the Company's products are denominated in U.S. dollars.


Gross Profit ($000,000)
- -----------------------
                                           First six months
                                      -------------------------
                                          1998         1997         Change

Gross profit                             $56.2        $48.2          17%
   Percentage of net revenues              76%          71%

Gross profit  increased  in both dollars and as a percentage  of net revenues in
the first half of 1998  compared to the first half of 1997.  Increased  sales of
higher gross margin  networking  products  more than offset the decline in gross
profit due to lower net revenues from the Company's User Interface products.


Operating Expenses and Charges ($000,000)
- -----------------------------------------
                                                 First six months
                                          --------------------------
                                               1998        1997         Change

Research and development                       $13.8       $11.3          22%
Percentage of net revenues                       19%         17%

In process research and development            $50.8           -

Marketing, general & administrative            $13.5       $12.9           5%
Percentage of net revenues                       18%         19%


<PAGE>

R&D expenses  increased  in both dollars and as a percentage  of net revenues in
the first  half of 1998  compared  to the same  period  in 1997.  All of the R&D
spending in 1998 and  substantially  all of the 1997  spending is related to the
Company's networking products.

Marketing,  general & administrative expenses increased in dollars and decreased
as a percentage  of net revenues in the first half of 1998 compared to the first
half of 1997.

Liquidity and Capital Resources

The Company's cash and cash equivalents and short term investments declined from
$69.2 million on December 28, 1997 to $60.9 million on June 28, 1998. During the
first six  months of 1998 the  Company's  operating  activities  provided  $25.2
million in cash. Significant investing activities included $27.2 million related
to the  Company's  purchase  of IGT,  $9.6  million  of  purchases  of plant and
equipment and $1.4 million related to the purchase of other in process  research
and development.  During the first half of 1998 the Company received a refund of
$4.0 million of foundry deposits based on its 1997 wafer purchases.

As of June 28, 1998, the Company's  principal sources of liquidity included cash
and cash  equivalents  of $60.9  million and an unused $15.0  million  revolving
credit  facility  put in place  during the quarter.  The Company  believes  that
existing cash and cash equivalents, anticipated funds from operations and access
to its  revolving  line of credit will satisfy the Company's  projected  working
capital  requirements,   anticipated  capital  expenditures  and  capital  lease
payments for the foreseeable future. The Company expects to purchase, or arrange
capital leases for  approximately  $10 - 12 million of new capital  expenditures
over the balance of 1998.

The  Company's  future  capital   requirements  will  depend  on  many  factors,
including,  among others,  product development and acquisitions of complementary
businesses,  products or technologies. To the extent that existing resources and
the funds  generated by future  earnings are  insufficient to fund the Company's
operations,  the Company may need to raise  additional  funds through  public or
private debt or equity  financing.  If additional  funds are raised  through the
issuance of equity securities,  the percentage ownership of current shareholders
will be reduced and such  equity  securities  may have  rights,  preferences  or
privileges  senior to those of the holders of the  Company's  Common  Stock.  No
assurance can be given that  additional  financing will be available or that, if
available,  it can be  obtained  on  terms  favorable  to the  Company  and  its
stockholders.  If adequate funds are not available,  the Company may be required
to delay, limit or eliminate some or all of its proposed operations.



FACTORS THAT MAY AFFECT FUTURE PERFORMANCE

THE  COMPANY'S  BUSINESS,  FINANCIAL  CONDITION  AND RESULTS OF  OPERATIONS  ARE
SUBJECT TO A NUMBER OF RISKS,  SOME OF WHICH ARE DESCRIBED  BELOW. THE FACT THAT
SOME OF THE RISK  FACTORS  MAY BE THE SAME OR SIMILAR TO THOSE IN THE  COMPANY'S
PAST SEC FILINGS MEANS ONLY THAT THE RISKS ARE PRESENT IN MULTIPLE PERIODS.  THE
COMPANY BELIEVES THAT MANY OF THE RISKS DETAILED HERE AND IN THE COMPANY'S OTHER
SEC FILINGS ARE PART OF DOING BUSINESS IN THE FABLESS  NETWORKING  SEMICONDUCTOR
INDUSTRY  AND WILL  LIKELY BE PRESENT  IN ALL  PERIODS  REPORTED.  THE FACT THAT
CERTAIN  RISKS ARE ENDEMIC TO THE INDUSTRY DOES NOT LESSEN THE  SIGNIFICANCE  OF
THE RISK.
<PAGE>

FLUCTUATIONS IN OPERATING RESULTS

The Company's quarterly and annual operating results may vary due to a number of
factors,  including,  among  others,  the timing of new  product  introductions,
decreased  demand or average selling prices for products,  market  acceptance of
products, demand for products of the Company's customers, the general conditions
of the networking industry,  the introduction of products or technologies by the
Company's  competitors,  competitive  pressure on product pricing, the Company's
and  its  customers'  inventory  levels  of  the  Company's  products,   product
availability from outside foundries,  variations in manufacturing yields for the
Company's products,  expenditures for new product and process  development,  the
acquisition  of wafer  fabrication  and other  manufacturing  capacity,  and the
acquisition of  businesses,  products or  technologies.  At various times in the
past,  the Company's  foundry and other  suppliers have  experienced  lower than
anticipated  yields that have adversely affected  production and,  consequently,
the Company.  There can be no assurance  that the  Company's  existing or future
foundry and other suppliers will not experience  irregularities which could have
a material  adverse  effect on the  Company.  The Company  from time to time may
order in advance of anticipated  customer  demand from its suppliers in response
to anticipated  long lead times to obtain  inventory and materials,  which might
result in excess  inventory  levels if expected  orders fail to  materialize  or
other  factors  render the  Company's  product or its  customer's  products less
marketable.  The  Company's  ability to forecast  sales of  networking  chips is
limited  due to  customer  uncertainty  regarding  future  demand  for  end-user
networking  equipment  and  price  competition  in  the  market  for  networking
equipment.  Any delay or  cancellation  of  existing  orders,  or any decline in
projected  future  orders,  by the  Company's  customers  could  have a material
adverse  effect on the Company.  Margins will vary  depending on product mix. In
the longer  term,  the  Company  may  experience  declining  gross  profits as a
percentage  of total net revenues if  anticipated  decreases in average  selling
prices of existing networking products are not offset by commensurate reductions
in product costs, or by an offsetting increase in gross profit contribution from
new, higher gross margin,  networking products.  The Company is also affected by
the state and  direction  of the  electronics  industry  and the  economy in the
United States and other markets the Company serves. The occurrence of any of the
foregoing or other factors could have a material  adverse effect on the Company.
Due to these factors, past results may not be indicative of future results.

TECHNOLOGICAL CHANGE

The markets for the Company's  products are  characterized by evolving  industry
standards,  rapid technological change and product  obsolescence.  Technological
change  may  be   particularly   pronounced  in  the   developing   markets  for
communications  semiconductor devices used in high-speed networks. The Company's
future  success  will  be  highly  dependent  upon  the  timely  completion  and
introduction of new products at competitive  price and performance  levels.  The
success  of new  products  depends  on a number  of  factors,  including  proper
definition  of such  products,  successful  and  timely  completion  of  product
development and introduction to market, correct judgment with respect to product
demand,  market  acceptance  of  the  Company's  and  its  customers'  products,
fabrication  yields by the  Company's  independent  foundries  and the continued
ability of the Company to offer  innovative new products at competitive  prices.
Many of these  factors are outside the control of the  Company.  There can be no
assurance  that the Company will be able to identify  new product  opportunities
successfully,  develop and bring to market new products,  achieve design wins or
be  able  to  respond  effectively  to  new  technological  changes  or  product
announcements  by others.  A failure in any of these areas would have a material
and adverse affect on the Company.

The Company's  current  strategy is focused on high-speed  networking  interface
chips. Products for telecommunications and data communications  applications are
based on industry standards that are continually evolving. Future transitions in
customer  preferences  could quickly make the  Company's  products  obsolete.  A
material part of the Company's  products are in the ATM  telecommunications  and
networking market, which is in an early stage of development.  The emergence and
adoption of new industry  standards  that compete with ATM or maintenance by the
industry  of  existing  standards  in lieu of new  standards  could  render  the
Company's ATM products  unmarketable  or obsolete.  The market for ATM equipment
has  not  developed  as  rapidly  as  industry  observers  have  predicted,  and
alternative  networking  technologies  such  as  "fast  ethernet"  and  "gigabit
ethernet" have developed to meet consumer requirements. A substantial portion of
the Company's  development efforts are focused on ATM and related products.  Net
revenues  derived from sales of ATM, T1/E1,  DS3/E3 and SONET/SDH based products
amounted to 67% and 33% of the  Company's  total net  revenues in 1997 and 1996,
respectively.  As a result of the Company's  1996  restructuring,  revenues from
non-networking products have declined significantly over the last several years,
making the Company's results depend primarily on networking products.

The Company,  through a business  combination,  acquired in process research and
development and developed technology relating to ethernet switching in September
1996.  Ethernet switching is a new product area for the Company and there can be
no  assurance  that  announced  products or products  in  development  will have
correctly  anticipated  the needs of the  networking  industry or that they will
receive sufficient design wins to achieve commercial success.

Many of the  Company's  products  under  development  are complex  semiconductor
devices that  require  extensive  design and testing  before  prototypes  can be
manufactured.  The integration of a number of functions in a single chip or in a
chipset  requires the use of advanced  semiconductor  manufacturing  techniques.
This can  result  in chip  redesigns  if the  initial  design  does  not  permit
acceptable  manufacturing  yields. The Company's products are often designed for
customers  who in many  instances  have not yet  fully  defined  their  hardware
products.  Design  delays or  redesigns by these  customers  could in turn delay
completion or require redesign of the semiconductor devices needed for the final
hardware product.  In this regard,  many of the relevant standards and protocols
for products based on high speed  networking  technologies  have not been widely
adopted or ratified by the relevant standard-setting bodies. Redesigns or design
delays often are required for both the hardware  manufacturer's products and the
Company's  chips  as  industry  and  customer  standards,  protocols  or  design
specifications  are  determined.  Any resulting  delay in the  production of the
Company's products could have a material adverse effect on the Company.


<PAGE>

COMPETITION

The  semiconductor  industry is intensely  competitive and is  characterized  by
rapid technological  change and by price erosion. The industry consists of major
domestic  and  international   semiconductor  companies,   many  of  which  have
substantially  greater financial and other resources than the Company.  Emerging
companies  also  provide   significant   competition  in  this  segment  of  the
semiconductor   market.  The  Company  believes  that  its  ability  to  compete
successfully  in this market  depends on a number of factors,  including,  among
others, the price, quality and performance of the Company's and its competitors'
products,  the timing and success of new product  introductions  by the Company,
its  customers  and  its  competitors,  the  emergence  of  new  standards,  the
development   of  technical   innovations,   the  ability  to  obtain   adequate
manufacturing  capacity,  the  efficiency of  production,  the rate at which the
Company's  customers  design the  Company's  products into their  products,  the
number and nature of the Company's  competitors in a given market, the assertion
of the Company's and its competitors'  intellectual  property rights and general
market and economic conditions.

The  Company's  competitors  in  this  market  include,  among  others,  Cypress
Semiconductor,  Dallas  Semiconductor,  Galileo  Technology,  Integrated  Device
Technology,  Level  One  Communications,   Lucent  Technologies,  MMC  Networks,
Rockwell International,  Siemens, Texas Instruments,  and Transwitch. The number
of  competitors  in this  market and the  technology  platforms  on which  their
products will compete may change in the future.  It is likely that over the next
few years additional competitors will enter the market with new products.  These
new competitors  may have  substantially  greater  financial and other resources
than the Company.  Competition among  manufacturers of  semiconductors  like the
Company's  products  typically  occurs at the design  stage,  where the customer
evaluates  alternative  design  approaches  that  require  integrated  circuits.
Because of shortened  product life cycles and design-in cycles in certain of the
Company's  customers  products,  the  Company's  competitors  have  increasingly
frequent  opportunities to achieve design wins in next generation  systems.  Any
success by the Company's competitors in supplanting the Company's products would
have a material adverse effect on the Company.

Historically, average selling prices ("ASPs") in the semiconductor industry have
decreased  over  the  life  of  the  particular  product.   The  willingness  of
prospective  customers  to design the  Company's  products  into their  products
depends to a  significant  extent  upon the  ability of the Company to price its
products at a level that is cost effective for such customers. If the Company is
unable to reduce its costs  sufficiently to offset declines in ASPs or is unable
to introduce new higher performance products with higher ASPs, the Company would
be materially and adversely  affected.  Any yield or other production  problems,
shortages of supply that increase the Company's  manufacturing costs, or failure
to reduce  manufacturing  costs,  would  have a material  adverse  effect on the
Company.

ACCESS TO WAFER FABRICATION AND OTHER MANUFACTURING CAPACITY

The Company does not own or operate a wafer fabrication facility, and all of its
semiconductor   device   requirements   are   supplied  by  outside   foundries.
Substantially  all  of  the  Company's   semiconductor  products  are  currently
manufactured by third party foundry  suppliers.  The Company's foundry suppliers
fabricate products for other companies and produce products of their own design.
The  Company's  reliance on  independent  foundries  involves a number of risks,
including  the  absence  of  adequate   capacity,   the   unavailability  of  or
interruptions in access to certain process technologies and reduced control over
delivery  schedules,  manufacturing  yields and  costs.  In the event that these
foundries  are unable or  unwilling  to continue to  manufacture  the  Company's
products in required  volumes,  the  Company  will have to identify  and qualify
acceptable additional or alternative foundries. This qualification process could
take six months or longer.  No assurance can be given that any such source would
become  available  to the Company or that any such source would be in a position
to satisfy the Company's  production  requirements on a timely basis, if at all.
Any  significant  interruption  in the supply of  semiconductors  to the Company
would result in the  allocation  of products to  customers,  which in turn could
have a material adverse effect on the Company.

All of the Company's  semiconductor  products are assembled by sub-assemblers in
Asia. Shortages of raw materials, political and social instability,  disruptions
in the  provision  of  services  by  the  Company's  assembly  houses  or  other
circumstances  that would require the Company to seek  additional or alternative
sources of supply or assembly could lead to supply  constraints or delays in the
delivery of the Company's products. Such constraints or delays may result in the
loss of  customers  or other  adverse  effects  on the  Company.  The  Company's
reliance  on  independent  assembly  houses  involves  a number of other  risks,
including reduced control over delivery schedules, quality assurances and costs,
the  possible   discontinuance  of  such  contractors'  assembly  processes  and
fluctuations of regional economies.  Any supply or other problems resulting from
such risks would have a material adverse effect on the Company.


<PAGE>

CUSTOMER CONCENTRATION

The Company has no long-term  volume purchase  commitments from any of its major
customers. The Company has only one customer that accounted for more than 10% of
its 1997  revenues,  but depends on a limited  number of  customers  for a major
portion of its revenues.

The  reduction,  delay or  cancellation  of orders from one or more  significant
customers  could have a material and adverse  affect on the Company.  Due to the
relatively  short  product  life  cycles  in  the  telecommunications  and  data
communications  markets,  the Company would be materially and adversely affected
if one or more of its significant  customers were to select devices manufactured
by one of the Company's competitors for inclusion in future product generations.
There can be no assurance that the Company's  current customers will continue to
place orders with the Company,  that orders by existing  customers will continue
at the levels of previous  periods,  or that the Company  will be able to obtain
orders  from  new  customers.  Loss  of one or  more  of the  Company's  current
customers or a disruption in the Company's sales and distribution channels could
have a material and adverse affect on the Company.

INTERNATIONAL OPERATIONS

In  fiscal  years  1997,  1996  and  1995,  international  sales  accounted  for
approximately 30%, 53% and 39% of the Company's net revenues,  respectively. The
Company's networking products must accommodate numerous worldwide communications
standards  and sales to US based  customers  are often for products that they in
turn  export  worldwide.  The  Company  expects  that  international  sales will
continue to represent a significant  portion of the Company's and its customers'
net  revenues  for  the  foreseeable  future.  The  majority  of  the  Company's
development,  test,  marketing and administrative  functions occur in Canada. In
addition,   substantially  all  of  the  Company's  products  are  manufactured,
assembled and tested by  independent  third parties in Asia. Due to its reliance
on  international  sales and operations,  the Company is subject to the risks of
conducting business outside of the United States. These risks include unexpected
changes in, or impositions of, legislative or regulatory requirements and policy
changes affecting the telecommunications and data communications markets, delays
resulting from difficulty in obtaining  export licenses for certain  technology,
tariffs,  quotas,  exchange  rates and other trade  barriers  and  restrictions,
longer payment cycles,  greater  difficulty in accounts  receivable  collection,
potentially  adverse  taxes,  the burdens of complying with a variety of foreign
laws and other factors beyond the Company's control. The Company is also subject
to general  geopolitical risks in connection with its international  operations,
such as political,  social and economic  instability,  potential hostilities and
changes in diplomatic and trade relationships. Sales of the Company's networking
products are denominated in U.S. dollars as are costs related to the manufacture
and assembly of products by the Company's Asian suppliers.  Costs related to the
majority  of the  Company's  development,  test,  marketing  and  administrative
functions are denominated in Canadian dollars.  Selling costs are denominated in
a variety of  currencies.  As a result,  the  Company is subject to the risks of
currency  fluctuations.  There  can be no  assurance  that  one or  more  of the
foregoing factors will not have a material adverse effect on the Company.


<PAGE>

DEPENDENCE ON KEY PERSONNEL

The  Company's  success  depends  to a  significant  extent  upon the  continued
services of its key technical  personnel,  particularly  those highly skilled at
the  design  and  test  functions  involved  in the  development  of high  speed
networking products and related software.  The competition for such employees is
intense.  The  Company  has no  employment  agreements  in place  with these key
personnel.  However, the Company from time to time issues shares of Common Stock
or options to purchase  Common Stock of the Company  subject to vesting.  To the
extent  shares  purchased  from or options  granted by the Company have economic
value,  these  securities  could create  retention  incentives.  The loss of the
services of one or more of these key personnel, and any difficulties the Company
may  experience  in hiring  qualified  replacements,  would have a material  and
adverse affect on the Company.

PATENTS AND PROPRIETARY RIGHTS

The  Company's  ability to compete is  affected  by its  ability to protect  its
proprietary  information.  The  Company  relies  on a  combination  of  patents,
trademarks,  copyrights,  trade  secret  laws,  confidentiality  procedures  and
licensing  arrangements to protect its intellectual property rights. The Company
currently holds several patents and has a number of pending patent applications.
There can be no assurance  that patents will be issued from any of the Company's
pending  applications or that any claims allowed will be of sufficient  scope or
strength,  or be issued in all  countries  where the  Company's  products can be
sold,  to provide  meaningful  protection  or any  commercial  advantage  to the
Company.  In addition,  competitors  of the Company may be able to design around
the  Company's  patents.  The laws of  certain  foreign  countries  in which the
Company's  products are or may be  developed,  manufactured  or sold,  including
various   countries  in  Asia,  may  not  protect  the  Company's   products  or
intellectual  property  rights to the same  extent as do the laws of the  United
States and thus make the  possibility of piracy of the Company's  technology and
products  more  likely.  There can be no  assurance  that the steps taken by the
Company to protect  its  proprietary  information  will be  adequate  to prevent
misappropriation  of its technology or that the Company's  competitors  will not
independently develop technologies that are substantially equivalent or superior
to the Company's technology.

The semiconductor  industry is characterized by vigorous  protection and pursuit
of intellectual property rights or positions, which have resulted in significant
and often protracted and expensive  litigation.  The Company or its customers or
foundries have in the past, and may from time to time in the future, be notified
of claims  that the  Company  may be  infringing  patents or other  intellectual
property  rights owned by third  parties.  If it is necessary or desirable,  the
Company may seek licenses under patents or intellectual  property rights.  There
can be no  assurance  that  licenses  will be available or that the terms of any
offered  license will be acceptable to the Company.  Failure to obtain a license
from a third party for technology used by the Company could cause the Company to
incur substantial  liabilities and to suspend the manufacture of products or the
use by the Company's  foundry suppliers  requiring the technology.  In the past,
the  Company's  customers  have been  required to obtain  licenses  from and pay
royalties to third parties for the sale of systems  incorporating  the Company's
semiconductor  devices. If this occurs in the future, the customers'  businesses
may be materially  and adversely  affected,  which in turn would have a material
and adverse  affect on the Company.  The Company has provided its customers with
indemnity up to the dollar  amount of their  purchases  of any Company  products

<PAGE>

found to be  infringing  on  technology  owned by third  parties.  Although  the
Company  discontinued  the practice of indemnifying its customers in December of
1997,  third party or customer claims may still be made against the Company with
respect to the infringement of the technology of third parties. Furthermore, the
Company may initiate claims or litigation against third parties for infringement
of  the  Company's  proprietary  rights  or to  establish  the  validity  of the
Company's proprietary rights.  Litigation by or against the Company could result
in  significant  expense to the Company and divert the efforts of the  Company's
technical and management personnel,  whether or not such litigation results in a
favorable  determination  for the Company.  In the event of an adverse result in
any such litigation,  the Company could be required to pay substantial  damages,
cease the manufacture,  use and sale of infringing  products,  spend significant
resources to develop non-infringing  technology,  discontinue the use of certain
processes  or obtain  licenses  to the  infringing  technology.  There can be no
assurance that the Company would be successful in such  development or that such
licenses  would  be  available  on  reasonable  terms,  or at all,  and any such
development or license could require  expenditures by the Company of substantial
time and other  resources.  Patent disputes in the  semiconductor  industry have
often been settled  through  cross-licensing  arrangements.  Because the Company
currently does not have a substantial  portfolio of patents, the Company may not
be able to settle an alleged patent infringement claim through a cross-licensing
arrangement.  Any  successful  third  party  claim  against  the  Company or its
customers for patent or intellectual property infringement could have a material
adverse effect on the Company.

ACQUISITIONS

The  Company's  strategy  may  involve,  in  part,   acquisitions  of  products,
technologies or businesses from third parties. Identifying and negotiating these
acquisitions  may divert  substantial  management  time away from the  Company's
operations.  An  acquisition  could absorb  substantial  cash  resources,  could
require the Company to incur or assume debt  obligations,  or could  involve the
issuance  of  additional  equity  securities  of the  Company.  The  issuance of
additional  equity  securities  could  dilute,  and could  represent an interest
senior to the rights of, then outstanding PMC common stock. An acquisition which
is accounted for as a purchase,  like the acquisition of the networking business
in 1994, the  acquisition of certain  assets of Bipolar  Integrated  Technology,
("Bit") in September  1996,  and the recent  acquisition  of Integrated  Telecom
Technology,  Inc.  could  involve  significant  one-time  write-offs,  and could
involve  the  amortization  of  goodwill  over a number  of years,  which  would
adversely affect earnings in those years. Any acquisition will require attention
from  the  Company's  management  to  integrate  the  acquired  entity  into the
Company's  operations,  may require the Company to develop expertise outside its
existing  businesses  and may result in departures of management of the acquired
entity.  An acquired entity may have unknown  liabilities,  and its business may
not achieve the results anticipated at the time of the acquisition.

FUTURE CAPITAL NEEDS

The  Company  must  continue to make  significant  investments  in research  and
development  as well as  capital  equipment  and  expansion  of  facilities  for
networking  products.  The Company's future capital  requirements will depend on
many factors,  including,  among others,  product  development,  investments  in
working  capital,  and  acquisitions of  complementary  businesses,  products or
technologies.  To the extent that  existing  resources  and future  earnings are
insufficient  to fund the  Company's  operations,  the Company may need to raise
additional  funds  through  public  or  private  debt or equity  financings.  If
additional  funds are raised  through  the  issuance of equity  securities,  the
percentage  ownership  of current  stockholders  will be reduced and such equity
securities  may have rights,  preferences  or privileges  senior to those of the
holders of the Company's Common Stock. No assurance can be given that additional
financing  will be available or that, if available,  it can be obtained on terms
favorable  to the  Company  and its  stockholders.  If  adequate  funds  are not
available,  the Company may be required to delay, limit or eliminate some or all
of its proposed  operations,  which could have a material  adverse effect on the
Company.


<PAGE>

VOLATILITY OF STOCK PRICE

Factors such as announcements of the introduction of new products by the Company
or its competitors, quarterly fluctuations in the Company's financial results or
the financial  results of other  semiconductor  companies or of companies in the
networking   or  personal   computer   industry,   general   conditions  in  the
semiconductor  industry and conditions in the worldwide  financial markets have,
in the  past,  caused  the  price of the  Company's  Common  Stock to  fluctuate
substantially,  and  may do so in the  future.  In  addition,  increases  in the
Company's stock price and expansion of its  price-to-earnings  multiple may have
made it  attractive  to so-called  momentum  investors.  Momentum  investors are
generally  thought to shift funds into and out of stocks  rapidly,  exacerbating
price  fluctuations  in either  direction.  The price of the Company's stock may
also be impacted by investor  sentiment toward  technology  stocks,  in general,
which often is unrelated to the operating performance of a specific company.

YEAR 2000 COMPUTER SYSTEMS ISSUES

The  Company  is aware of the  issues  associated  with the  limitations  of the
programming code in many existing computer systems, whereby the computer systems
may not properly  recognize  date sensitive  information as the next  millennium
(year 2000) approaches.  Systems that do not properly recognize such information
could  generate  erroneous  data  or  cause  a  system  to  fail,  resulting  in
disruptions  of  the  Company's  operations.  The  Company  has  identified  all
significant  applications  that will  require  modification  to ensure year 2000
compliance.  The Company uses commercially  available  standard software for its
critical operating and financial  applications.  One vendor of critical software
used by the Company has provided a program update,  which is intended to rectify
the year 2000 issues related to this software.  This update was installed in the
second quarter of 1998.  Updates for the Company's other  non-critical  software
are  available  at the current time and, if new versions of the software are not
already  purchased,  are  planned for  installation  in 1999.  If the  Company's
vendors'  updates do not  successfully  rectify the year 2000 issues  related to
their software,  the Company could be forced to purchase a competing system that
is year 2000  compliant  and  incur  installation  and  other  costs in order to
mitigate the Year 2000 Issue. The installation of a replacement system for those
applications that are currently not year 2000 compliant is not anticipated to be
material to the  Company's  financial  position or results of  operations in any
given year. In the event that the current systems need to be entirely  replaced,
the Company estimates that it would cost approximately $2 million to acquire and
implement new systems.  Any new systems would be  capitalized  and  subsequently
depreciated.

The Company's  suppliers and customers are generally  much larger  organizations
than the Company with a greater  number of suppliers and customers of their own.
The Company believes that many of its suppliers and customers have not completed
their own  systems  modification  to be year 2000  compliant.  The  company  has
received  written  communication  from its  critical  suppliers  that  they have
developed  an action  plan to address the issues  related to the year 2000.  The
failure of significant suppliers or customers of the Company to become year 2000
compliant could have a material effect on the Company.  Those consequences could
include  the  inability  to  receive  product  in a timely  manner or lost sales
opportunities  either  of  which  could  result  in a  material  decline  in the
Company's revenues and profits.


<PAGE>

PART II - OTHER  INFORMATION

Item 2.       CHANGES IN SECURITIES AND USE OF PROCEEDS

On May 20,  1998 the  Company  issued  414,635  shares  of its  Common  Stock to
stockholders of Integrated Telecom  Technology,  Inc. ("IGT") in connection with
the  acquisition  of IGT by the Company.  The total  consideration  paid for the
acquisition  of IGT was  approximately  $55  million,  comprised  of the  shares
issued,  cash payments and options to purchase  214,414  shares of the Company's
Common  Stock  that were  issued to option  holders of IGT and  registered  on a
registration statement on Form S-8.

The issuance of the shares was made as a non-public  offering in reliance on the
exemption from registration under Section 4(2) of the Securities Act. The shares
were offered  (without  public  solicitation)  and issued to a limited number of
purchasers who represented  their intention to acquire the shares for investment
only and not with a view to the distribution  thereof.  Appropriate legends were
affixed to the stock certificates.  All the purchasers  received,  or had access
to, adequate  information about the Company. On June 3, 1998 the Company filed a
registration  statement on Form S-3 covering the resale of the shares, which was
later declared effective by the SEC.


Item 4.       SUBMISSION OF MATTERS TO A VOTE BY STOCKHOLDERS

The Annual Meeting of Shareholders of PMC-Sierra,  Inc. was held on May 27, 1998
for the purposes of electing directors of the Company, approving an amendment to
the  Company's  1994  Incentive  Stock Plan to increase  the number of shares of
Common Stock reserved for issuance by 1,100,000  shares,  approving an amendment
to the  Company's  1991 Employee  Stock  Purchase Plan to increase the number of
shares of Common Stock  reserved for  issuance by 250,000  shares,  approving an
amendment to the Company's 1994  Incentive  Stock Plan to increase the number of
shares  of  Common  Stock  reserved  for  issuance  on  January  1 of each  year
(beginning January 1, 1999) by the lesser of (i) 4% of the outstanding shares on
such date, (ii) 2,000,000  shares, or (iii) an amount determined by the Board of
Directors,  approving an amendment to the Company's 1991 Employee Stock Purchase
Pan to increase  the number of shares of Common  Stock  reserved for issuance on
January 1 of each year  (beginning  January  1, 1999) by the lesser of (i) 1% of
the outstanding  shares on such date,  (ii) 500,000  shares,  or (iii) an amount
determined  by the Board of  Directors,  approving an amendment to the Company's
Certificate  of  Incorporation  to increase the  authorized  number of shares of
Common  Stock by  50,000,000  shares to a total of  100,000,000  shares,  and to
ratify the  appointment  of Deloitte & Touche LLP as the  Company's  independent
auditors for the 1998 fiscal year.

All nominees for directors were elected,  both  amendments to the Company's 1994
Incentive  Stock Plan were  approved,  both  amendments  to the  Company's  1991
Employee  Stock  Purchase  Plan were  approved,  the  amendment to the Company's
Certificate of Incorporation was approved,  the appointment of Deloitte & Touche
LLP as the Company's independent auditors for the 1998 fiscal year was ratified.
The voting on each matter is set forth below:

To elect  Directors  of the Company to serve for the ensuing  year and until the
next Annual meeting or the Election of their successors.

Nominee:                   For                Withheld
- --------                   ---                --------

Robert L. Bailey           27,309,539         207,874
Alexandre Balkanski        27,306,059         207,874
Colin Beaumont             27,306,425         207,874
James V. Diller            27,296,448         207,874
Frank L. Marshall          27,308,622         207,874


Proposal to approve an  amendment to the  Company's  1994  Incentive  Stock Plan
("Stock  Plan") to increase  the number of shares of Common  Stock  reserved for
issuance by 1,100,000 shares.

For                        Against            Abstain          Broker non-vote
- ---                        -------            -------          ---------------

13,731,099                 9,697,435          38,895           4,046,698

<PAGE>

Proposal to approve an amendment to the company's  1991 Employee  Stock Purchase
Plan  ("ESPP") to increase  the number of shares of Common  Stock  reserved  for
issuance by 250,000 shares.

For                        Against            Abstain          Broker non-vote
- ---                        -------            -------          ---------------

22,775,442                 212,906            479,081          4,046,698

Proposal to approve an annual increase to the Stock Plan  (beginning  January 1,
1999) by the  lesser of 4% of the  outstanding  shares,  2,000,000  shares or as
determined by the Board.

For                        Against            Abstain          Broker non-vote
- ---                        -------            -------          ---------------

13,936,832                 9,368,447          54,872           4,153,976

Proposal to approve an annual increase to the ESPP  (beginning  January 1, 1999)
by the lesser of 1% of the outstanding  shares,  500,000 shares or as determined
by the Board.

For                        Against            Abstain          Broker non-vote
- ---                        -------            -------          ---------------

20,436,236                 2,542,029          489,164          4,046,698

Proposal to approve an amendment to the Company's  Certificate of  Incorporation
to increase the number of authorized shares of Common Stock by 50,000,000 shares
to a total of 100,000,000 shares.

For                        Against            Abstain          Broker non-vote
- ---                        -------            -------          ---------------

25,607,352                 1,320,392          479,105          107,278


Proposal to ratify the  appointment  of  Deloitte & Touche LLP as the  Company's
independent auditors for the 1998 fiscal year.

For                        Against            Abstain          Broker non-vote
- ---                        -------            -------          ---------------

27,039,636                 10,964             463,527          0


<PAGE>
Item 5.  OTHER INFORMATION - DESCRIPTION OF CAPITAL STOCK


                          DESCRIPTION OF CAPITAL STOCK
                          ----------------------------

The  authorized  capital stock of the Company  consists of 100,000,000 shares of
Common Stock,  par value $0.001,  and 5,000,000  shares of Preferred  Stock, par
value $0.001.

The  following  summary of certain  provisions of the Common Stock and Preferred
Stock does not  purport to be complete  though the Company  believes it contains
all the material  provisions,  and is subject to, and  qualified in its entirety
by, the  provisions of the Company's  Certificate  of  Incorporation  and by the
provisions of applicable law.

Common Stock
- ------------

The  Company's  Common Stock is  registered  under Section 12(g) of the Exchange
Act. Subject to preferences that may be applicable to any outstanding  Preferred
Stock  which  may be issued  in the  future,  the  holders  of Common  Stock are
entitled to receive  ratably such  non-cumulative  dividends,  if any, as may be
declared  from  time to time by the  Board of  Directors  out of  funds  legally
available  therefor.  The Common Stock has no preemptive or conversion rights or
other  subscription  rights.  There are no redemption or sinking fund provisions
available to the Common  Stock.  The holders of Common Stock are entitled to one
vote per share on all matters to be voted upon by the stockholders,  except that
stockholders  may,  in  accordance  with  Section  214 of the  Delaware  General
Corporation Law, cumulate their votes in the election of directors. In the event
of liquidation,  dissolution or winding up of the Company, the holders of Common
Stock are entitled to share  ratably in all assets  remaining  after  payment of
liabilities,  subject to  liquidation  preferences,  if any, of Preferred  Stock
which may be issued in the future.  All  outstanding  shares of Common Stock are
fully paid and non-assessable.

Preferred Stock
- ---------------

Pursuant to the Company's  Certificate of Incorporation,  the Board of Directors
of the Company has the  authority to issue up to  5,000,000  shares of Preferred
Stock in one or more  series,  to fix the rights,  preferences,  privileges  and
restrictions  granted to or imposed upon any wholly unissued series of Preferred
Stock,  and to fix  the  number  of  shares  constituting  any  series  and  the
designations  of  such  series,  without  any  further  vote  or  action  by the
stockholders.  Such issued  Preferred  Stock could  adversely  effect the voting
power and other rights of the holders of Common Stock. The issuance of Preferred
Stock may also have the effect of delaying,  deferring or preventing a change in
control of the Company. At present, there are no outstanding shares of Preferred
Stock.

Rights of Holders of Special Shares of PMC-Sierra, Ltd.
- -------------------------------------------------------

The Special  Shares of  PMC-Sierra,  Ltd. are redeemable for Common Stock of the
Company.  Special  Shares do not have voting  rights in the Company,  but in all
other  respects  they  represent the economic and  functional  equivalent of the
Common  Stock of the Company for which they can be  redeemed.  Under  applicable
law,  each class of Special  Shares  will have  class  voting  rights in certain
circumstances  with respect to transactions  that affect the rights of the class
and for  certain  extraordinary  corporate  transactions.  Two kinds of  Special
Shares are outstanding: A Special Shares and B Special Shares.


<PAGE>

Delaware Law
- ------------

Section 203 of the Delaware General  Corporation Law, from which the Company has
not opted out in its Certificate of  Incorporation,  restricts certain "business
combinations" with "interested  stockholders" for three years following the date
that a person or entity becomes an interested stockholder,  unless the Company's
Board of Directors  approves  the  business  combination  and/or  certain  other
requirements are met.


<PAGE>

Item 6.   EXHIBITS AND REPORTS ON FORM 8-K

          (a)  Exhibits -

               -  3.1C  Certificate of Amendment to Certificate of Incorporation
                        of PMC-Sierra, Inc. filed on June 4, 1998.

               -  10.23 Revolving  Operating  Line of Credit  Agreement  between
                        PMC-Sierra,  Inc.  and CIBC Inc.  dated  21st day of May
                        1998.

               -  10.24 Revolving  Operating  Line of Credit  Agreement  between
                        PMC-Sierra, Ltd. and CIBC dated 21st day of May, 1998

               -  10.25 Pledge Agreement between PMC-Sierra,  Inc. and CIBC Inc.
                        with respect to shares of PMC-Sierra Ltd. dated 11th day
                        of March, 1998.

               -  10.26 Pledge Agreement between PMC-Sierra,  Inc and CIBC, Inc.
                        with respect to shares of PMC-Sierra  International Inc.
                        dated 27th day of April, 1998.

               -  10.27 Guarantee  Agreement between  PMC-Sierra,  Inc. and CIBC
                        dated 27th day of April, 1998.

               -  10.28 1998 PMC-Sierra (Maryland), Inc. Stock Option Plan

               -  11.1  Calculation of earnings per share

               -  27    Financial Data Schedule



          (b)  Reports on Form 8-K -

               -  A Current  Report  on Form 8-K was filed on April 20,  1998 to
                  disclose the Company's signing of a definitive agreement dated
                  April 15, 1998 to purchase Integrated Telecom Technology, Inc.
                  
               -  A  Current  Report  on Form 8-K was  filed on June 3,  1998 to
                  disclose  the   Company's   completion   of  the  purchase  of
                  Integrated  Telecom  Technology,  Inc. ("IGT"),  together with
                  audited  balance  sheets of IGT as of  December  31,  1996 and
                  December  31,  1997  and  audited  statements  of  operations,
                  stockholders'  deficiency  and cash flows for the years  ended
                  December 31, 1996 and December  31, 1997.

               -  An  amended  Current  Report on Form 8-K was filed on June 22,
                  1998 to file the unaudited balance sheet of IGT as of March 31
                  1998,  the unaudited  statements of operations  and cash flows
                  for the 3 months ended March 31 1998 and March 31,  1997,  the
                  unaudited  combined balance sheet of the Company and IGT as of
                  March 31, 1998 and the unaudited pro forma combined statements
                  of  operations  for the 3 months  ended March 31, 1998 and for
                  the year ended December 31, 1997.


<PAGE>


SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                             PMC-SIERRA, INC.
                                             (Registrant)


Date:    August 12, 1998                      /S/ JOHN W. SULLIVAN
         ---------------                     ------------------------------
                                             John W. Sullivan
                                             Vice President, Finance
                                             Chief Financial Officer
                                             (Principal Accounting Officer)




                           CERTIFICATE OF AMENDMENT TO

                         CERTIFICATE OF INCORPORATION OF

                                PMC-SIERRA, INC.

         PMC-Sierra,  Inc., a corporation  organized and existing under the laws
of the State of Delaware (the "Corporation"), hereby certifies that:

         1.  The name of the Corporation is PMC-Sierra, Inc. The Corporation was
originally  incorporated  under the same name,  and the original  Certificate of
Incorporation  was filed with the Secretary of State of the State of Delaware on
May 2, 1997.

         2.  The  first   paragraph  of  Article  IV  of  the   Certificate   of
Incorporation of the Corporation shall be amended to read as follows:

             "This corporation is authorized to issue two classes of stock to be
designated,  respectively, "Common Stock" and "Preferred Stock." The Corporation
is authorized to issue a total of 105,000,000  shares.  100,000,000 shares shall
be Common  Stock,  par value  $0.001,  and  5,000,000  shares shall be Preferred
Stock, par value $0.001."

         3.  This  Certificate  of  Amendment  of  the   Corporation's   Amended
Certificate of Incorporation has been duly adopted by the Corporation's board of
directors  in  accordance  with  Section 242 of the General  Corporation  Law of
Delaware.

         4.  This  Certificate  of  Amendment  of  the   Corporation's   Amended
Certificate of Incorporation has been duly approved by the holders of a majority
of each class of outstanding  stock of the Corporation  entitled to vote thereon
in accordance with Sections 242 of the General Corporation Law of Delaware.

         IN WITNESS  WHEREOF,  the  Corporation  has caused this  Certificate of
Amendment to Certificate of Incorporation to be signed by Robert L. Bailey,  its
President, on this 28th day of May, 1998.


                                       PMC-SIERRA, INC.


                                       By: /s/ Robert L. Bailey
                                           ---------------------------
                                           Robert L. Bailey, President




                                                                       CIBC INC.
                                                            425 Lexington Avenue
                                                              New York, NY 10017
                                                               Tel: 212-856-4000

CIBC Oppenheimer

May 21, 1998

PMC - Sierra, Inc.
105 - 8555 Baxter Place
Burnaby, B.C.
V5A 4V7

Attention:  Mr. John Sullivan

Dear Sirs:

     We, CIBC Inc.,  are pleased to establish the following  credit for you, our
customer.

                            Committed Operating Line

Credit Limit:            U.S.  $15,000,000,  less  the  U.S.  equivalent  of the
                         principal  amount  at the  time of the  liabilities  of
                         PMC-Sierra Ltd., a Canadian  corporation,  ("PMC Ltd.")
                         in connection with its operating line facility pursuant
                         to the credit  agreement  issued by  Canadian  Imperial
                         Bank of Commerce  ("CIBC") on or about the date hereof,
                         as amended and replaced  from time to time,  (the "CIBC
                         Credit Agreement").

Availability:            May be  availed  by you by way of U.S.  alternate  base
                         rate loans, and/or LIBOR Loans and/or financial standby
                         letters of credit.  Availments by way of U.S. alternate
                         base rate loans  and/or  LIBOR Loans will be limited to
                         minimum draws of $1,000,000.

Description  and Rate:   A revolving  committed  credit,  for  general  business
                         purposes, having the following parts:

                         (1)   U.S.alternate  base rate loans. The Interest Rate
                               is as follows:  U.S.  Alternate Base Rate plus 0%
                               per year.

                         (2)   U.S. dollar LIBOR loans.  The Interest Rate is as
                               follows: LIBO Rate plus 1.0% per year.

                         (3)   Financial standby letters of credit. The fees are
                               equal to 1% of the  principal  amount of the L/C,
                               plus out of pocket expenses.

<PAGE>


Letters of Credit:       L/Cs  may not  have  terms to  expiry  of more  than 12
                         months or beyond the committed term of this Credit. Our
                         standard  L/C  documentation  is also  required.  If we
                         issue  an  L/C,  the  available  Credit  Limit  will be
                         reduced by 100% of the face amount of the L/C. If there
                         is a drawing  under any L/C,  you will  forthwith  upon
                         demand pay us the amount(s) drawn under the L/C. If you
                         do not pay us the amount demanded  interest will accrue
                         on the  amount  drawn  under  the  L/C  at the  Default
                         Interest  Rate until the amount  drawn under the L/C is
                         paid in full,  unless you have made other  arrangements
                         with us.

Repayment/Termination:   Repayments  of U.S.  alternate  base rate loans  and/or
                         LIBOR  Loans must be in minimum  amounts of  $1,000,000
                         or, if less, the then outstanding amount thereof.

                         This  Credit  will  expire two years  after the date of
                         this Agreement,  except CIBC Inc. may from time to time
                         renew its  commitment by an additional  year;  provided
                         that this  Credit  must be  repaid in full  immediately
                         upon, and further availments will cease to be available
                         upon,  the earlier of the expiry of the committed  term
                         of this Credit,  the occurrence of an Event of Default,
                         or there having occurred (in our reasonable  opinion) a
                         change in effective control of your company or PMC Ltd.
                         with  respect to the power to elect the majority of the
                         Board of Directors of your company or PMC Ltd. ("Change
                         of Control").
<PAGE>


Standby Fee:             A standby  fee of 30 basis  points  per  year,  payable
                         monthly in arrears, will apply to the unused portion of
                         this Credit.



                                    Security

Security:                The following security is required:

Hypothecation:           A pledge from you,  hypothecating 65% of the issued and
                         outstanding  voting  shares in the  capital of PMC Ltd.
                         and 65% of the  issued  and  outstanding  shares in the
                         capital of PMC - Sierra International, Inc.

                                    Covenants

Financial Covenants:     You   will   ensure   that  the   following   financial
                         covenants/requirements,  tested  at the  end of each of
                         your fiscal  quarters,  are  satisfied  on the basis of
                         your consolidated financial statements:




<PAGE>


                         Quick Ratio:  The Quick Ratio (cash or equivalents plus
                         accounts  receivable  plus the  unused  portion of this
                         Credit,  divided  by current  liabilities)  must not be
                         less than 0.8:1.
                                               
                         Debt to Effective  Equity Ratio:  The Debt to Effective
                         Equity Ratio (using the following definitions) must not
                         exceed 2:1.

                         Debt is defined as all debts and  liabilities  (whether
                         absolute  or   contingent,   and  including  all  lease
                         obligations  which would be required to be disclosed on
                         your  consolidated   financial   statements)  excluding
                         deferred  income taxes and excluding debt  subordinated
                         and postponed to CIBC Inc. and CIBC  (provided that all
                         the terms of which are satisfactory to such lenders).

                         Effective Equity is defined as the aggregate of:

                         (a)   amounts paid up on issued and outstanding  shares
                               of all classes;
                         
                         (b)   retained earnings;

                         (c)   contributed  surplus;  

                         (d)   debt  subordinated and postponed to CIBC Inc. and
                               CIBC  (provided  that all the  terms of which are
                               satisfactory   to  such  lenders)  to  the  prior
                               repayment  and  satisfaction  of  all  debts  and
                               liabilities pursuant to this Agreement,  the CIBC
                               Credit  Agreement and your guarantee  thereunder;
                               plus
                         
                         (e)   Special Shares of PMC Ltd  convertible  into your
                               common stock;

                         minus all  intangibles  including,  but not  limited to
                         goodwill,  copyrights,  patents, trademarks,  licences,
                         research   and   development    costs,   and   deferred
                         development  costs;  provided  that for the purposes of
                         this  ratio,   equity   investments  in  non-affiliated
                         companies will not be treated as intangibles so long as
                         the  combined  total of all such  investments  does not
                         exceed  $20,000,000  (or any higher amount agreed to in
                         this regard by us in writing).

                         Profitability:  An operating  loss must not be incurred
                         in two consecutive fiscal quarters.

                         Capital Expenditures  (excluding  acquisitions):  Total
                         capital expenditures,  excluding acquisitions permitted
                         below under  "Restriction  on  Acquisitions",  must not
                         exceed  $16,000,000  in  fiscal  1997,  $20,000,000  in
                         fiscal 1998, and $25,000,000 in fiscal 1999 without our
                         prior  written  consent  (which  consent  will  not  be
                         unreasonably withheld).
<PAGE>

Other Covenants:         Restriction  on  Acquisitions:  Neither  you nor any of
                         your subsidiaries  will make any material  acquisitions
                         without our prior written consent,  except, provided no
                         Event  of  Default  exists  nor  will  result  from the
                         proposed   acquisition   during  the   fiscal   quarter
                         immediately  succeeding the fiscal quarter within which
                         the  acquisition  was made  (calculated on the basis of
                         your  financial  statements  on  a  consolidated  basis
                         submitted for your fiscal quarter immediately preceding
                         the date of the  acquisition),  and provided  there has
                         not been a Change of  Control  of your  company  or PMC
                         Ltd:

                         (a)  you,  or any of  your  subsidiaries,  may  make an
                         acquisition  without our prior  written  consent if the
                         purchase  price in respect of the proposed  acquisition
                         does not exceed the Applicable Limit referred to below;
                         and

                         (b) if the  purchase  price in respect of the  proposed
                         acquisition  exceeds the  Applicable  Limit referred to
                         below,   you,   or  any  of  your   subsidiaries,   may
                         nevertheless make the proposed acquisition if you first
                         provide proforma financial  statements to us which take
                         into account the effect of the proposed acquisition and
                         all debt incurred or assumed in  connection  therewith,
                         and which  demonstrate  compliance  with all  financial
                         covenants/requirements  set forth  herein,  both before
                         and after the proposed acquisition.

                         For the purposes hereof,  the "Applicable  Limit" means
                         $40,000,000  unless your Debt to Effective Equity Ratio
                         on a consolidated  basis (exclusive of the acquisition)
                         exceeds 1:1, in which case the "Applicable Limit" means
                         $20,000,000.

                         Restriction on Divestments: Neither you nor any of your
                         subsidiaries    will   make   any   material   business
                         divestment,  other  than for  cash,  without  our prior
                         written  consent.  The cash  proceeds from the material
                         divestment will be used in the first instance to retire
                         any  outstanding   borrowings/indebtedness   under  the
                         credit facilities established hereunder which, however,
                         may be readvanced or incurred subject to your continued
                         compliance  with all of the terms and conditions of the
                         credit facilities provided for hereunder.
                        
                         Restriction on Cash  Dividends:  You will not issue any
                         cash dividends without our prior written consent.
<PAGE>

                         Negative   Pledge:   Neither   you   nor  any  of  your
                         subsidiaries  will  create  or allow any Lien on any of
                         your/their  present or future assets, nor will you/they
                         assign  any  right to any  income,  without  our  prior
                         written consent, except you/they are permitted to enter
                         into  lease  commitments  or  Purchase  Money  Liens on
                         normal  commercial  terms,  in the  ordinary  course of
                         business  up  to   $10,000,000  in  each  fiscal  year,
                         provided  no  Event  of  Default  exists  nor  will the
                         proposed  transaction give rise to an Event of Default,
                         and provided  there has not been a Change of Control of
                         your company or PMC Ltd.


Reporting Requirements:  (1)  Within  30 days  of each  quarter  end,  you  will
                         provide  us with a  consolidated  aged  list  of  trade
                         accounts receivable, as of that quarter-end.

                         (2)  Within  60 days  of the end of each of the  first,
                         second and third  quarters,  you will provide us with a
                         copy of your Form 10-Q, as of each quarter-end.

                         (3) Within 120 days of each fiscal  year-end,  you will
                         provide  us with a copy of  your  Form  10-K as of that
                         year-end,  which is to  include a copy of your  audited
                         consolidated year-end financial statements.


                                Other Provisions

Indemnity re Reserves, 
Capital Adequacy, Etc.   If the introduction or  implementation of or any change
                         in or in the  interpretation  of, or any  change in its
                         application  to us of,  any  law or any  regulation  or
                         guideline   issued  by  any   central   bank  or  other
                         governmental authority (whether or not having the force
                         of law),  including  without  limitation any reserve or
                         special deposit  requirement or any tax (other than tax
                         on our general income) or any capital requirement,  has
                         (due  to  our  compliance)  the  effect,   directly  or
                         indirectly,  of  (i)  increasing  the  cost  to  us  of
                         performing our obligations  hereunder or under any L/C;
                         (ii)  reducing any amount  received or receivable by us
                         hereunder or our effective  return  hereunder or on our
                         capital;  or (iii) causing us to make any payment or to
                         forgo  any  return  based  on any  amount  received  or
                         receivable  by us  hereunder  or in respect of any L/C;
                         then  upon  demand  from time to time you will pay such
                         amount  as  shall  compensate  us for  any  such  cost,
                         reduction,  payment or forgone return. You will further
                         indemnify us for all  out-of-pocket  costs,  losses and
                         expenses  incurred by us in connection with any L/C and
                         agree  that we will  have no  liability  to you for any
                         reason  in  respect  of any  availment  other  than  on
                         account of our gross  negligence or wilful  misconduct.
                         Any   certificate  of  CIBC  Inc.  in  respect  of  the
                         foregoing  will be  conclusive  and  binding  upon you,
                         except  for  manifest  error,  provided  that we  shall
                         determine  the amounts  owing to us in good faith using
                         any reasonable averaging and attribution methods.
<PAGE>

Obligations re L/Cs if 
Credit Terminated:       You  will  pay to us on  demand  all of our  contingent
                         liability  in respect of (i) any L/C  outstanding  upon
                         any  termination  of this Credit and (ii) any L/C which
                         is  the   subject   matter  of  any  order,   judgment,
                         injunction  or  other  such  determination  restricting
                         payment by us under and in accordance  with such L/C or
                         extending  our  liability  under  such L/C  beyond  the
                         expiration  date stated therein (an "Order").  We agree
                         that we will,  with respect to each such L/C,  upon the
                         later of:
                                                
                         (a)   the earlier of: (i) the date on which either  the
                               orginal counterpart of such L/C is returned to us
                               for  cancellation  or  we  are  released  by  the
                               beneficiary  from  any  further   obligations  in
                               respect of such L/C; and, (ii) the expiry of such
                               L/C; and
   
                         (b)   the date on which any final  order,  judgment  or
                               other such  determination  has been  rendered  or
                               issued either  terminating the applicable  Order,
                               or  permanently  enjoining  us from paying  under
                               such L/C;
         
                         
                         pay to you an amount  equal to any excess of the amount
                         received by us hereunder  in respect of our  contingent
                         liability  under such L/C (the "Received  Amount") over
                         the  total  of  amounts  applied  to  reimburse  us for
                         amounts paid by us under such L/C (CIBC Inc. having the
                         right to so appropriate  such funds),  together with an
                         additional amount computed by applying to the amount of
                         such excess from time to time a per annum rate equal to
                         3% per year less  than the U.S.  Alternate  Base  Rate.
                         Such additional amount shall be calculated daily on the
                         basis of a calendar  year for the actual number of days
                         elapsed from and including the date of payment to us of
                         the Received  Amount to (but not including) the date of
                         return to you of the excess.

Default Interest Rate:   Currently 21% per year.


Next Scheduled Review 
Date:                    May 31,  1999.  Such  that  CIBC  Inc.  may  renew  its
                         commitment  by  an  additional  one  year  on  mutually
                         agreeable terms.

Termination of Agreement 
by Borrower:             This  Agreement  may be  terminated  by you at any time
                         upon  written  notice to CIBC Inc. and upon payment and
                         satisfaction  of all of  your  debts  and  liabilities,
                         absolute and contingent, to CIBC Inc. and CIBC.

Standard Credit Terms:   The   attached   Schedule  -  Standard   Credit   Terms
                         (including   the   revisions   indicated   thereon   in
                         bold-faced  or  struck-out  text)  forms  part  of this
                         Agreement.

Expenses and Costs:      All  reasonable out of pocket  expenses  incurred by us
                         (excluding any syndication or  participation  expenses)
                         will be for your account.

Amendment:               This  Agreement  may  only  be  amended  by a  document
                         executed by the party against whom  enforcement  of the
                         amendment is sought.
<PAGE>

Assignment:              You may not  assign  this  Agreement.  We may assign or
                         grant  participation  in  our  rights  and  obligations
                         hereunder, with each such assignee or participant being
                         entitled to rely on all indemnities contained herein.

Governing Law:           This agreement will be construed in accordance with the
                         laws of the State of New York.

Set-Off:                 Upon the  occurrence of an Event of Default and so long
                         as the Event of Default exists,  we may at any time and
                         from  time to time,  without  notice  to you (any  such
                         notice being expressly  waived),  set-off and apply any
                         and all  deposits  (general or  special)  and any other
                         indebtedness  at any time held by or owing by us to you
                         or for your  credit  or your  account,  against  and on
                         account of any or all of your debts and  liabilities to
                         us hereunder, whether or not then due, whether absolute
                         or contingent, and irrespective of the currency(ies) in
                         question.

Entire Agreement:        In accordance with the scheduled review date set out in
                         the Credit  Agreement  dated  March 11,  1998 issued by
                         CIBC Inc. to you the "Previous Credit Agreement",  this
                         Agreement  extends the Previous  Credit  Agreement  and
                         restates the terms thereof as set out above.  There are
                         no   understandings,    inducements,   representations,
                         warranties,   collateral   agreements   or   conditions
                         affecting or supported by this Agreement  other than as
                         expressed in this Agreement.

Accounting Terms 
and GAAP:                All  accounting  terms not  otherwise  defined have the
                         meanings  assigned to them in accordance  with GAAP. In
                         this  Agreement,   "GAAP"  means   generally   accepted
                         accounting  principles  from time to time applicable in
                         the  United  States  of  America  and  approved  by the
                         Financial  Accounting  Standards Board or any successor
                         thereto,  as  applied  on a basis  consistent  with the
                         financial  statements of the preceding  fiscal  period,
                         except as disclosed  therein or where the inconsistency
                         is immaterial.

Successors:              In this Agreement,  any reference to a corporate entity
                         includes  and is  also  a  reference  to any  corporate
                         entity  that is a  successor  to such  entity,  whether
                         immediate or derivative.

Currency:                Unless otherwise  indicated all dollar amounts referred
                         to in this  Agreement are in lawful money of the United
                         States of America.
<PAGE>

Waivers of Jury Trial:   CIBC Inc. and PMC - Sierra, Inc. hereby irrevocably and
                         unconditionally waive trial by jury in any legal action
                         or proceeding  relating to this  Agreement or any other
                         loan document and for any counterclaim therein.  


     Please  indicate your  acceptance of these terms by returning a signed copy
of this  Agreement.  If we do not receive a signed copy by June 12,  1998,  then
this offer will expire.

     Upon acceptance,  this Agreement extends the Previous Credit Agreements and
restates the terms thereof, as set out above. Outstanding amounts (and security)
under the Previous Credit Agreement will be covered by this Agreement.

Yours truly,

CIBC Inc.


by: /S/ Howard A.Palmer
Howard A. Palmer
Authorized Signatory
Phone no.: (212) 856-3504
Fax no.:   (212) 856-3761

Acknowledgement:         The undersigned certifies that all information provided
to CIBC Inc.  is true,  and  acknowledges  receipt of a copy of, and accepts the
terms of, this  Agreement  (including  the attached  Schedule - Standard  Credit
Terms).

                                    Accepted this   10th     day of  June, 1998.
                                                              PMC - Sierra, Inc.

                                                       By:/S/ John W. Sullivan

                                                       Name: John W. Sullivan

                                                       Title: VP Finance




<PAGE>



                           Schedule - Standard Credit
Article 1 - General

1.1   Interest  Rate.  You will pay interest on each Credit at nominal rates per
year equal to:

      (a) for amounts  above the Credit  Limit of a Credit or a part of a Credit
          or for amounts that are not paid when due, the Default  Interest Rate,
          and

      (b) for any other amounts, the rate specified in this Agreement.

1.2    Variable interest.  Each  variable  interest rate provided for under this
Agreement will change automatically,  without notice, whenever the Prime Rate or
the U.S. Alternate Base Rate, as the case may be, changes.

1.3   Payment of interest.  Interest is  calculated  on the daily balance of the
Credit  at the end of  each  day.  Interest  is due  once a  month,  unless  the
Agreement  states otherwise and you will pay the interest when it is due. Unless
you have made other  arrangements with us regarding the payment of interest,  we
will be charging  interest on overdue  interest (which is known as compounding).
Unpaid interest  continues to compound  whether or not we have demanded  payment
from you or started a legal action, or get judgment, against you.

1.4   Default Interest.  To determine whether Default Interest is to be charged,
the following rules apply:

      (a) Default Interest will be charged on the amount that exceeds the Credit
          Limit of any particular Credit.

      (b) If there are  several  parts of a  Credit,  Default  Interest  will be
          charged if the Credit  Limit of a  particular  part is  exceeded.  For
          example, if Credit A's limit is $250,000, and the limit of one part is
          $100,000  and the limit of that part is exceeded  by $25,000,  Default
          Interest  will be charged on that  $25,000  excess,  even if the total
          amount outstanding under Credit A is less than $250,000.

1.5   Fees.  You will pay CIBC  Inc.'s  fees for each  Credit as outlined in the
Letter.  You will also reimburse us for all  reasonable  fees  (including  legal
fees) and out-of-pocket  expenses  incurred in registering any security,  and in
enforcing our rights under this Agreement or any security. We will automatically
debit your Operating Account for fee amounts owing.
<PAGE>

1.6   Our  rights  re  demand  Credits.  At  CIBC  Inc.,  we  believe  that  the
banker-customer  relationship  is based  on  mutual  trust  and  respect.  It is
important  for us to know all the  relevant  information  (whether  good or bad)
about  your  business.  CIBC  Inc.  is  itself a  business.  Managing  risks and
monitoring  our  customers'  ability  to repay is  critical  to us.  We can only
continue to lend when we feel that we are likely to be repaid.  As a result,  if
you do something that  jeopardizes  that  relationship,  or if we no longer feel
that you are likely to repay all  amounts  borrowed,  we may have to act. We may
decide to act, for example,  because of something you have done,  information we
receive  about your  business,  or  changes  to the  economy  that  affect  your
business.  Some of the actions that we may decide to take include  requiring you
to give us more financial information, negotiating a change in the interest rate
or fees, or asking you to get further accounting assistance,  put more cash into
the business, provide more security, or produce a satisfactory business plan. It
is  important  to us  that  your  business  succeeds.  We may,  however,  at our
discretion,  demand  immediate  repayment of any  outstanding  amounts under any
demand  Credit.  We may also,  at any time and for any cause,  cancel the unused
portion of any demand Credit. Under normal circumstances,  however, we will give
you 30 days' notice of any of these actions.

1.7   Payments.  If any payment is due on a day other than a Business  Day, then
the payment is due on the next Business Day.

1.8   Applying money received. If you have not made payments as required by this
Agreement,  or if you have failed to satisfy any term of this  Agreement (or any
other agreement you have that relates to this Agreement),  or at any time before
default  but after we have given you  appropriate  notice,  we may decide how to
apply any money that we receive.  This means that we may choose  which Credit to
apply the money against,  or what mix of principal,  interest,  fees and overdue
amounts within any Credit will be paid.

1.9   Information requirements.  We may from time to time reasonably require you
to provide further  information about your business.  We may require information
from you to be in a form acceptable to us. We will use your  information only in
connection with the credits and will keep it confidential  unless required to be
disclosed by law or court order.

1.10  Insurance. You will keep all your business assets and property insured (to
the full  insurable  value)  against  loss or damage by fire and all other risks
usual for  property  such as yours (plus for any other  risks we may  reasonably
require). If we ask, you will give us either the policies themselves or adequate
evidence of their existence. If your insurance coverage for any reason stops, we
may (but do not have to) insure the property.  We will automatically  debit your
Operating Account for these amounts.  Finally, you will notify us immediately of
any loss or damage to the property.
<PAGE>

1.11  Environmental.  You will carry on your business,  and maintain your assets
and  property,  in  accordance  with  all  applicable   environmental  laws  and
regulations.  If  (a) there is any  release,  deposit,  discharge or disposal of
pollutants of any sort  (collectively,  a "Discharge") in connection with either
your business or your property, and we pay any fines or for any clean-up, or (b)
we suffer any loss or damage as a result of any  Discharge,  you will  reimburse
CIBC Inc., its directors, officers, employees and agents for any and all losses,
damages,  fines,  costs and other amounts (including amounts spent preparing any
necessary environmental  assessment or other reports, or defending any lawsuits)
that  result.  If we ask,  you  will  defend  any  lawsuits,  investigations  or
prosecutions  brought  against  CIBC  Inc.  or any of its  directors,  officers,
employees and agents in connection  with any  Discharge.  Your  obligation to us
under this  section continues  even after all Credits  have been repaid and this
Agreement has terminated.

1.12  Consent to release  information.  We may from time to time give any credit
information  about you to, or receive such information  from,  (a) any financial
institution,  credit reporting agency,  rating agency or credit bureau,  (b) any
person,  firm or corporation with whom you may have or propose to have financial
dealings,  and  (c)any  person,  firm or  corporation  in  connection  with any
dealings  you have or  propose  to have with us.  You agree that we may use that
information to establish and maintain your relationship with us and to offer any
services as permitted  by law,  including  services and products  offered by our
subsidiaries when it is considered that this may be suitable to you.

1.13  Our  pricing  policy:  Fees,  interest  rates and other  charges  for your
banking  arrangements are dependent upon each other. If you decide to cancel any
of these  arrangements,  you will have to pay us any  increased  or added  fees,
interest  rates and charges we determine  and notify you of. These  increased or
added amounts are effective from the date of the changes that you make.

1.14  Proof of debt.  This Agreement  provides the proof,  between CIBC Inc. and
you, of the credit made  available  to you.  There may be times when the type of
Credit you have requires you to sign additional  documents.  Throughout the time
that we provide you credit under this  Agreement,  our loan  accounting  records
will provide  complete proof of all terms and conditions of your credit (such as
principal loan balances, interest calculations, and payment dates).
<PAGE>

1.15  Renewals of this Agreement.  This Agreement will remain in effect for your
Credits for as long as they  remain  unchanged.  We have shown a Next  Scheduled
Review Date in the Letter. If there are no changes to the Credits this Agreement
will continue to apply, and you will not need to sign anything further. If there
are any changes, we will provide you with either an amending agreement, or a new
replacement Letter, for you to sign.

1.16  Confidentiality:  The terms of this Agreement are confidential between you
and CIBC  Inc..  You  therefore  agree  not to  disclose  the  contents  of this
Agreement to anyone  except your  professional  advisors or (as required by law)
any regulatory or governmental body, including,  without limitation,  the United
States Securities and Exchange Commission.

1.17  Pre-conditions.  You  may  use  the  Credits  granted  to you  under  this
Agreement only if:

      (a) we have received properly signed copies of all  documentation  that we
          may reasonably require and which we have provided to you in connection
          with the  operation  of your  accounts  and your ability to borrow and
          give  security;  

      (b) all the required  security has been  received  and  registered  to our
          satisfaction;  

      (c) any special provisions or conditions set forth in the Letter have been
          complied with;  and (d) if applicable,  you have given us the required
          number of days notice for a drawing under a Credit.

1.18  Notices.  We may give you any  notice  in person  or by  telephone,  or by
letter that is sent either by fax or by mail.

1.19  Use of the Operating  Line. You will use your Operating Line only for your
business  operating  cash  needs.  You are  responsible  for all debits from the
Operating  Account  that you  have  either  initiated  (such  as  cheques,  loan
payments,  pre-authorized  debits,  etc.) or authorized us to make. Payments are
made by making deposits to the Operating Account. You may not at any time exceed
the  Credit  Limit.  We may,  without  notice to you,  return any debit from the
Operating  Account  that,  if paid,  would  result  in the  Credit  Limit  being
exceeded,  unless  you have made  prior  arrangements  with us. If we pay any of
these debits, you must repay us immediately the amount by which the Credit Limit
is exceeded.
<PAGE>

1.20  Foreign Currency  Conversion.  If this Agreement includes foreign currency
Credits, then currency changes may affect whether either the Credit Limit of any
Credit or the Overall Credit Limit has been exceeded.

      (a) See  section  1.4 for the  general  rules on how  Default  Interest is
          calculated.

      (b) To determine the Overall Credit Limit,  all foreign  currency  amounts
          are  converted  to U.S.  dollars,  even if the  Credit  Limits  of any
          particular  Credits are quoted directly in a foreign currency (such as
          Canadian dollars).  No matter  how the  Credit  Limit of a  particular
          Credit is quoted, therefore,  currency fluctuations can affect whether
          the Overall Credit Limit has been exceeded.  For example, if Credits X
          and Y have Credit Limits of US$100,000 and  CDN$50,000,  respectively,
          with  an  Overall  Credit  Limit  of  US$135,000,  if  Credit  X is at
          US$90,000  and Credit Y is at  CDN$45,000,  Default  Interest  will be
          charged only if, after converting the Cdn. dollar amount,  the Overall
          Credit Limit is exceeded.

      (c) Whether the Credit Limit of a particular Credit has been exceeded will
          depend on how the Credit Limit is quoted, as described below.

  
      (d) If the Credit  Limit is quoted as, for example,  the  Canadian  dollar
          equivalent of a U.S. dollar amount,  daily exchange rate  fluctuations
          may affect  whether  that Credit Limit has been  exceeded.  If, on the
          other  hand,  the Credit  Limit is quoted in a foreign  currency  (for
          example, directly in Cdn. dollars), whether that Credit Limit has been
          exceeded is  determined  by reference  only to the closing  balance of
          that Credit in that currency.

      (e) For example, assume an outstanding balance of a Credit on a particular
          day of CDN$200,000.  If the Credit Limit is stated as "the Cdn. dollar
          equivalent  of  US$140,000",  then  whether  the Credit  Limit of that
          Credit has been exceeded  will depend on the value of the U.S.  dollar
          on  that  day.  If the  conversion  calculations  determine  that  the
          outstanding  balance is under the Credit Limit, a drop in the value of
          the U.S.  dollar the next day  (without any change in the balance) may
          have the effect of putting that Credit over its Credit  Limit.  If, on
          the other  hand,  the  Credit  Limit is stated as  "CDN$200,000",  the
          Credit  Limit is not  exceeded,  and a drop in the value of the dollar
          the next day will not change that  (although the Overall  Credit Limit
          may be affected).

      (f) Conversion  calculations  are done on the closing daily balance of the
          Credit. The conversion factor used is the mid-point between the buying
          and  selling  rate  offered by CIBC Inc.  (or if such rates can not be
          determined, the mid-point between such rates offered by CIBC) for that
          currency on the conversion date.

1.21  Instalment Loans.  The following terms apply to each Instalment Loan.

      (a) Non-revolving  loans.  Unless  otherwise  stated  in the  Letter,  any
          Instalment  Loan is  non-revolving.  This  means  that  any  principal
          payment  made  permanently  reduces the  available  Loan  Amount.  Any
          payment  we receive is  applied  first to  overdue  interest,  then to
          current interest owing,  then to overdue  principal,  then to any fees
          and charges owing, and finally to current principal.
<PAGE>

      (b) Floating Rate Instalment  Loans.  Floating Rate  Instalment  Loans may
          have either (i) blended  payments or (ii) payments of fixed  principal
          amounts, plus interest, as described below.

          (i)   Blended  payments.  If you have a  Floating  Rate  Loan that has
                blended  payments,  the amount of your monthly  payment is fixed
                for the term of the loan,  but the  interest  rate  varies  with
                changes  in the Prime or U.S.  Alternate  Base Rate (as the case
                may be).  If the Prime or U.S.  Alternate  Base Rate  during any
                month is lower than what the rate was at the outset, you may end
                up paying  off the loan  before  the  scheduled  end  date.  If,
                however,  the Prime or U.S.  Alternate  Base Rate is higher than
                what it was at the outset,  the amount of principal that is paid
                off  is  reduced.  As a  result,  you  may  end up  still  owing
                principal at the end of the term because of these changes in the
                Prime or U.S. Alternate Base Rate.

      
          (ii)  Payments of principal plus interest. If you have a Floating Rate
                Loan that has regular  principal  payments,  plus interest,  the
                principal  payment  amount of your  Loan is due on each  payment
                date specified in the Letter.  The interest  payment is also due
                on the same date, but it is debited from your Operating  Account
                one or two banking days later.  Although the  principal  payment
                amount is fixed, your interest payment will usually be different
                each month, for at least one and possibly more reasons,  namely:
                the reducing  principal balance of your loan, the number of days
                in the month,  and  changes to the Prime Rate or U.S.  Alternate
                Base Rate (as the case may be).
  
      (c) repayment.  Unless  otherwise  agreed,  the  following  terms apply to
          prepayment of any Instalment Loan:

      
          (i)   Floating Rate Instalment  Loans. You may prepay all or part of a
                Floating  Rate  Instalment  Loan  (whether  it is a Demand  or a
                Committed Loan) at any time without notice or penalty.

     
          (ii)  Fixed  Rate  Instalment  Loans.  You may prepay all or part of a
                Fixed Rate Instalment Loan, on the following condition. You must
                pay us, on the  prepayment  date, a prepayment  fee equal to the
                interest rate  differential for the remainder of the term of the
                Loan, in accordance with the standard  formula used by CIBC Inc.
                in these situations.

      (d) Demand of Fixed Rate Demand Instalment Loans. If you have a Fixed Rate
          Demand Instalment Loan and we make demand for payment, you will owe us
          (i) all outstanding principal,  (ii) interest,  (iii) any other amount
          due under this  Agreement,  and (iv) a prepayment  fee. The prepayment
          fee is equal to the interest  rate  differential  for the remainder of
          the term of the loan, in accordance with the standard  formula used by
          CIBC Inc. in these situations.

1.22  Notice of Default.  You will promptly  notify us of the  occurrence of any
event that is an Event of  Default  (or any that would be an Event of Default if
the only thing required is either notice being given or time elapsing, or both).

<PAGE>

                Article 1 - LIBO Rate Provisions

1.1   Definitions.  In this  Agreement,  the following  terms have the following
meanings:

      "LIBO Rate" for any LIBOR  Period  means a rate of interest per year equal
to the rate at which we are prepared to offer, as at 11:00 a.m. (London, England
time) on the second LIBOR  Business  Day before the start of that LIBOR  Period,
deposits to leading banks in London, England interbank eurocurrency market in an
amount of U.S.  dollars  similar to the amount of the applicable  LIBOR Loan and
for a deposit period comparable to that LIBOR Period;  except that, if we do not
receive  proper or timely  notice as required  below but we permit your request,
then the LIBOR Rate for such LIBOR Period means the rate of interest per year as
determined by us (in our absolute discretion) and offered to you and immediately
accepted by you.

      "LIBOR   Business  Day"  means  a  Business  Day  on  which  U.S.   dollar
transactions  can  be  carried  out  between  leading  banks  in  the  interbank
eurocurrency  market in London,  England and between CIBC Inc. and other leading
banks in New York City.

      "LIBOR Loan" means a Fixed Rate Loan in U.S. dollars in whole multiples of
US$1,000,000 on which interest is calculated by reference to a LIBO Rate.

      "LIBOR  Period" means the period  selected by you in accordance  with this
Agreement for computing interest from time to time on a LIBOR Loan.

1.2   Availability.  LIBOR  Loans  are  available  only in  whole  multiples  of
US$1,000,000 each, for terms of one to six months.

1.3   Required Notice.

      (a) You may draw down or roll over a LIBOR Loan,  or convert  another type
          of Credit under this Agreement to a LIBOR Loan, or repay a LIBOR Loan,
          but only as provided in this Article.  Any such action must be done on
          a LIBOR  Business  Day.  Also,  you must give  notice  (in the form we
          require) to the CIBC Inc.  Branch/Centre before 10:00 a.m. (local time
          where the CIBC Inc.  Branch/Centre  is  located).  The notice  must be
          given on the third LIBOR  Business  Day before the  requested  date of
          drawdown,  rollover,  conversion  or  repayment.  You may roll over or
          convert an existing LIBOR Loan only on the expiry of its LIBOR Period.

      (b) If we do not  receive  proper or  timely  notice  as  required  by the
          preceding  paragraph,  we may (but we are not  obliged to) decide what
          you are  permitted  to do for that LIBOR  Loan.  We may,  on the other
          hand,  simply roll over an existing LIBOR Loan at the end of its LIBOR
          Period for a new LIBOR Loan with a new LIBOR Period determined by us.
<PAGE>

1.4   Maturity Limitation.  The expiry date of a LIBOR Period for any LIBOR Loan
may not (a) be after a scheduled or required  maturity or  termination  date for
that Credit or (b)  conflict,  in our opinion,  with any  scheduled or mandatory
repayment for that Credit.

1.5   Repayments.  You may only  repay all (but not part) of a LIBOR  Loan,  and
only on the last day of the LIBOR Period for that LIBOR Loan.

1.6   Interest  Calculation  and  Payment.  Interest  at a  LIBO  Rate  will  be
calculated on the daily balance of each LIBOR Loan for the actual number of days
elapsed,  on the basis of a 360 day year.  You will pay  interest  on each LIBOR
Loan in arrears at the end of each LIBOR  Period.  If a LIBOR  Period is greater
than three  months,  you will pay interest at the end of each three month period
during  that  LIBOR  Period,  except  that  overdue  interest  will  be  payable
immediately on demand. Overdue amounts in respect of a LIBOR Loan (including any
overdue  interest) may at our option be either converted to another type of loan
(if available) under any Credit or considered to be a LIBOR Loan for one or more
LIBOR Periods as we may determine.

1.7   Interest  Act.  Each nominal rate of interest  referenced  to a LIBO Rate,
expressed as an annual rate for purposes of the Interest Act  (Canada),  is that
rate  multiplied  by the actual number of days in the calendar year in which the
rate is to be ascertained, and divided by 360.

1.8   Lack of LIBO Rate.  At any time before the start of any LIBOR  Period,  we
might  determine  that (a) by  reason of  circumstances  affecting  the  London,
England interbank eurocurrency market generally,  adequate and fair means do not
exist for  determining  the LIBO Rate  applicable for that LIBOR Period,  or (b)
deposits in U.S. dollars are not in the ordinary course of business available to
CIBC Inc. in that market for deposit periods  comparable to that LIBOR Period in
a total amount similar to that LIBOR Loan bearing  interest at a rate no greater
than the LIBO Rate  applicable to that LIBOR Loan. If we do, then from and after
that date, you may not roll over any existing LIBOR Loan at the end of its LIBOR
Period, or obtain any new LIBOR Loan. Our determination of any events under this
paragraph will be conclusive.

1.9   Illegality.  If at any time we  determine  in good  faith  that any  legal
requirement  or any  official  directive  or request  (whether or not having the
force of law) by a central  bank or other  governmental  authority  will make it
unlawful or impossible for us to make,  maintain or fund any LIBOR Loan, we will
notify you accordingly. Upon receiving such a notice, you will either (a) on the
last day of the LIBOR  Period of any LIBOR Loan,  if we can continue to maintain
that loan, or (b) immediately,  if we cannot legally maintain that loan, 
(1)   pay us in full the then  outstanding  principal  amount of each such LIBOR
Loan, together with all accrued interest, or

(2)    convert that loan into another type of loan allowed under this Agreement.

      For clarification, upon a payment or conversion of a LIBOR Loan made under
this section in the middle of its LIBOR Period,  you will  immediately on demand
compensate us as provided elsewhere in this Agreement.  Our determination of any
matters under this paragraph will be conclusive.

<PAGE>

                     Article 2 - Definitions

2.1    Definitions.  In this Agreement,  the following  terms have the following
meanings:
 
      "Alternate  Base Rate Loan" means a U.S.  dollar loan on which interest is
calculated by reference to the U.S. Alternate Base Rate.

      "Business  Day" means any day (other than a Saturday or a Sunday) that the
CIBC Inc. Branch/Centre is open for business.

      "CIBC Inc.  Branch/Centre"  means the CIBC Inc.  branch or banking  centre
noted on the  first  page of this  Agreement,  as  changed  from time to time by
agreement between the parties.

      "Committed  Loan"  means a Loan  (including  an  operating  line)  that is
repayable in full only upon the earlier of the expiry of the  committed  term of
the Loan,  the occurrence of an Event of Default,  or there having  occurred (in
our  reasonable  opinion) a Change of Control of (as  defined in the  Letter) of
your company or PMC Ltd. Such a Loan may be either at a fixed or a floating rate
of interest.

      "Credit" means any credit referred to in the Letter,  and if there are two
or more parts to a Credit, "Credit" includes reference to each part.

      "Credit  Limit" of any Credit means the amount  specified in the Letter as
its Credit Limit, and if there are two or more parts to a Credit, "Credit Limit"
includes reference to each such part.

      "Default Interest Rate", unless otherwise defined in the Letter, means the
Standard Overdraft Rate.

      "Demand  Instalment  Loan" means an  Instalment  Loan that is payable upon
demand. Such a Loan may be either at a fixed or a floating rate of interest.

      "Event of Default"  means,  in connection with any Committed Loan (even if
that Loan has not yet been drawn), the occurrence of any of the following events
(or the occurrence of any other event of default described in this Agreement, in
any of the  security  documents  or in any other  agreement or document you have
signed with us):

      (1) You do not pay,  when due,  any amount that you are required to pay us
          under this  Agreement  or  otherwise  and such failure is not remedied
          within 5 days after  notice,  or you do not  perform any of your other
          obligations  to us under  this  Agreement  or  otherwise  and any such
          failure (if curable) is not remedied within 10 days after notice.

      (2) Any part of the security terminates or is no longer in effect, without
          our prior written consent.

  
      (3) You  cease to carry  on your  business  in the  normal  course,  or it
          reasonably appears to us that that may happen.


      (4) A  representation  that you have  made (or  deemed to have made in any
          certificate or document delivered to CIBC hereunder) in this Agreement
          or in  any  security  agreement  is  incorrect  or  misleading  in any
          material respect.
<PAGE>

(5)   (i) An  actual  or  potential  default  or  event  of  default  occurs  in
connection  with any debt  owed by you or by PMC Ltd  (including  any  actual or
potential default or event of default under the CIBC Credit Agreement), with the
result  that the  payment of the debt has  become,  or is  capable of  becoming,
accelerated,  or (ii) you do not make a payment when due in connection  with any
such debt after the expiration of any applicable grace period.  (This subsection
(5),  however,  applies  only to  amounts  that  we  reasonably  consider  to be
material.)

(6)   We believe, in good faith and upon commercially  reasonable grounds,  that
all or a material part of your property is or is about to be placed in jeopardy.

(7)   The holder of a Lien or a receiver or similar official takes possession of
all or a material  part of your  property;  or a  distress,  execution  or other
similar process is levied against any such property.

(8)   You (i) become  insolvent;  (ii) are unable generally to pay your debts as
they  become  due;  (iii) make a  proposal  in  bankruptcy,  or file a notice of
intention to make such a proposal;  (iv) make an assignment in  bankruptcy;  (v)
bring a court action to have yourself declared insolvent or bankrupt; or someone
else brings an action for such a declaration;  or (vi) you default in payment or
breach any other material obligation to any of your other creditors.

(9)   If you are a corporation, (i) you are dissolved; (ii) your shareholders or
members pass a resolution for your winding-up or liquidation; (iii) someone goes
to court  seeking your  winding-up  or  liquidation,  or the  appointment  of an
administrator,  conservator,  receiver,  trustee,  custodian  or  other  similar
official for you or for all or substantially  all your assets;  or (iv) you seek
protection under any statute offering relief against the company's creditors.

      "Fixed Rate Instalment Loan" means an Instalment Loan that is also a Fixed
Rate Loan.

      "Fixed Rate Loan" means any loan drawn down, converted or extended under a
Credit at an interest rate which was fixed for a term,  instead of referenced to
a variable rate such as the Prime Rate or U.S.  Alternate Base Rate, at the time
of such drawdown,  conversion or extension.  For purposes of certainty,  a Fixed
Rate Loan includes a LIBOR Loan.

      "Floating Rate Instalment  Loan" means an Instalment Loan that is either a
Prime Rate Loan or an Alternate Base Rate Loan.

      "Instalment  Loan"  means  a  loan  that  is  repayable  either  in  fixed
instalments  of principal,  plus  interest,  or in blended  instalments  of both
principal  and  interest.  A Demand  Instalment  Loan is repayable on demand.  A
Committed  Instalment  Loan is repayable only upon the occurrence of an Event of
Default.

      "Letter" or "Agreement"  means the letter  agreement  between you and CIBC
Inc. to which this  Schedule and any other  Schedules  are attached and includes
the schedule(s).

      "Letter of Credit" or "L/C"  means a  documentary  or  stand-by  letter of
credit,  a letter of  guarantee,  or a similar  instrument in form and substance
satisfactory to us.
<PAGE>

      "Lien" includes a mortgage, charge, lien, security interest or encumbrance
of any  sort on an  asset,  and  includes  conditional  sales  contracts,  title
retention agreements, capital trusts and capital leases.

      "Normal  Course  Lien" means a Lien that (a) arises by operation of law or
in the  ordinary  course of  business  as a result of owning any such asset (but
does not include a Lien given to another  creditor to secure  debts owed to that
creditor) and (b), taken  together with all other Normal Course Liens,  does not
materially affect the value of the asset or its use in the business.

      "Operating  Account"  means  the  account  that you  normally  use for the
day-to-day  cash  needs of your  business,  and may be  either or both of a U.S.
dollar and a Canadian dollar account.

      "Prime  Rate"  means the  variable  reference  rate of  interest  per year
declared  by CIBC  from time to time to be its prime  rate for  Canadian  dollar
loans made by CIBC in Canada.

      "Prime  Rate  Loan"  means a Canadian  dollar  loan on which  interest  is
calculated by reference to Prime Rate.

      "Purchase  Money Lien" means a Lien  incurred  in the  ordinary  course of
business  only to secure all or part of the  purchase  price of an asset,  or to
secure debt used only to finance all or part of the purchase of the asset.

      "Standard  Overdraft Rate" means the variable  reference interest rate per
year declared by CIBC Inc. from time to time to be its standard  overdraft  rate
on overdrafts in U.S. or Canadian dollar  accounts  maintained with CIBC Inc. in
the United States of America.

      "U.S.  Alternate Base Rate" means the variable reference interest rate per
year as  declared  by CIBC  Inc.  from time to time to be its base rate for U.S.
dollar  commercial  demand  loans  made by CIBC  Inc.  in the  United  States of
America,  and means on any day a fluctuating  rate of interest per year equal to
the highest of: 

      (a) the rate of interest  most  recently  established  by CIBC Inc. as its
base rate for U.S.  dollar  commercial  demand  loans  made by CIBC Inc.  in the
United  States;  and 

      (b) the  "Federal  Funds  Rate" plus 0.5%,  where the  Federal  Funds Rate
means,  for any  particular  day,  the  variable  rate  of  interest  per  year,
calculated on the basis of a year of 360 days,  equal to the weighted average of
rates on  overnight  federal  funds  transactions  with  members of the  Federal
Reserve  System  arranged  by  Federal  Funds  brokers as  released  on the next
succeeding  business day by the Federal  Reserve  Bank of New York;  

      Neither  the  U.S.  Alternate  Base  Rate  nor any  component  thereof  is
necessarily  intended to be the lowest rate of interest  determined by CIBC Inc.
in connection with extensions of credit.

                                                       Commerce Place Commercial
                                                                         Banking
                                                      400 Burrard St., 7th Floor
                                                                  Vancouver, B.C
                                                                         V6C 3A6
CIBC

May 21, 1998

PMC - Sierra Ltd.
105 - 8555 Baxter Place
Burnaby, B.C.
V5A 4V7

Attention: Mr. John Sullivan

Dear Sirs:

         We,  Canadian  Imperial  Bank of  Commerce  ("CIBC"),  are  pleased  to
establish the following credits for you, our customer.

                       Credit A: Committed Operating Line

   Credit Limit:                       U.S. $15,000,000,  less the amount at the
                                       time of the  liabilities of PMC - Sierra,
                                       Inc.,   a  Delaware   corporation,   (the
                                       "Guarantor")   in  connection   with  its
                                       operating line facility  pursuant to CIBC
                                       Inc.'s credit agreement dated on or about
                                       the date hereof,  as amended and replaced
                                       from time to time, (the "CIBC Inc. Credit
                                       Agreement").

   Availability:                       May be  availed  by you by way of current
                                       account overdraft in Canadian and/or U.S.
                                       Dollars,  and/or Bankers'  Acceptances in
                                       Canadian Dollars, and/or L/C Acceptances,
                                       and/or Canadian or U.S. Dollar or Foreign
                                       Currency L/Cs,  and/or LIBOR Loans and/or
                                       financial   or   non-financial    standby
                                       letters of credit.

   Description and Rate:               A revolving committed credit, for general
                                       business  purposes,  having the following
                                       parts:

                                             (1)     U.S. dollar  overdrafts and
                                       L/C Acceptances.  The Interest Rate is as
                                       follows: U.S. Base Rate plus 0% per year.

                                             (2)     U.S.  dollar  LIBOR  loans.
                                       The  Interest  Rate is as follows:  LIBOR
                                       Rate plus 1.0% per year.

                                             (3)     Canadian  Dollar overdrafts
                                       and L\C Acceptances. The Interest Rate is
                                       as follows: Prime Rate plus 0% per year.

                                             (4)     Canadian  Dollar B/As.  The
                                       stamping  fee is  123  basis  points  per
                                       year.
<PAGE>

                                             (5)     Canadian and/or U.S. Dollar
                                       or Foreign  Currency  L/Cs.  The fees are
                                       our standard L/C fees, minimum $150, plus
                                       out of pocket expenses.

   Letters of Credit:                  L/Cs may not have terms to expiry of more
                                       than 12 months or  beyond  the  committed
                                       term of this  Credit.  Our  standard  L/C
                                       documentation  is  also  required.  If we
                                       issue an L/C, the available  Credit Limit
                                       will  be  reduced  by  100%  of the  face
                                       amount of the L/C.  If there is a drawing
                                       under any L/C,  we will pay it by drawing
                                       on your  Operating  Account,  unless  you
                                       have made other arrangements with us.

   Repayment/Termination:              This  Credit  will expire two years after
                                       the date of this  Agreement,  except CIBC
                                       may   from   time  to  time   renew   its
                                       commitment   by   an   additional   year;
                                       provided  that this Credit must be repaid
                                       in full  immediately  upon,  and  further
                                       availments  will  cease  to be  available
                                       upon,  the  earlier  of the expiry of the
                                       committed   term  of  this  Credit,   the
                                       occurrence  of an  Event of  Default,  or
                                       there having  occurred (in our reasonable
                                       opinion) a change in effective control of
                                       your  company  or  the   Guarantor   with
                                       respect   to  the   power  to  elect  the
                                       majority  of the  Board of  Directors  of
                                       your company or the Guarantor ("Change of
                                       Control").


                   Credit B: Foreign Exchange Contracts

   Credit Limit:                       U.S. $4,000,000.

   Description:                        You may  enter  into  one or  more  spot,
                                       forward or other  foreign  exchange  rate
                                       transactions  with us and/or  Wood  Gundy
                                       Inc.  Your  ability  to make  use of this
                                       Credit will depend upon your  outstanding
                                       obligations under such  transactions,  as
                                       determined  by  us.  This  facility  is a
                                       demand  credit,  provided that even if no
                                       demand  is  made  this  facility  must be
                                       repaid in full when  Credit A is required
                                       to be repaid in full.
<PAGE>

                          Credit C: Cheque Credit

   Credit Limit:                       U.S. $1,500,000.

   Description:                        You may negotiate  cheques at our Burnaby
                                       and  Vancouver  Branches that we identify
                                       for you in a total face  amount  each day
                                       up to the  Credit  Limit of this  Credit.
                                       This   facility   is  a  demand   credit,
                                       provided  that  even if no demand is made
                                       this facility must be repaid in full when
                                       Credit  A is  required  to be  repaid  in
                                       full.


                                    Security

   Security:                           The following security is required:

   Guarantee:                          Guarantee from the Guarantor in an amount
                                       that is limited to  U.S.$25,000,000  plus
                                       interest,  which guarantee will include a
                                       "gross-up" clause.
<PAGE>

                                    Covenants

   Financial Covenants:                You  will  ensure   that  the   following
                                       financial covenants/requirements,  tested
                                       at the  end of  each  of the  Guarantor's
                                       fiscal  quarters,  are  satisfied  on the
                                       basis  of  the   consolidated   financial
                                       statements for the Guarantor:

                                       Quick  Ratio:  The Quick  Ratio  (cash or
                                       equivalents plus accounts receivable plus
                                       the unused  portion of Credit A,  divided
                                       by current  liabilities) must not be less
                                       than 0.8:1.

                                       Debt to Effective  Equity Ratio: The Debt
                                       to  Effective  Equity  Ratio  (using  the
                                       following  definitions)  must not  exceed
                                       2:1.

                                            Debt is  defined  as all  debts  and
                                       liabilities    (whether    absolute    or
                                       contingent,   and   including  all  lease
                                       obligations which would be required to be
                                       disclosed on the Guarantor's consolidated
                                       financial  statements) excluding deferred
                                       income   taxes   and    excluding    debt
                                       subordinated  and  postponed  to CIBC and
                                       CIBC Inc. (provided that all of the terms
                                       of  which   are   satisfactory   to  such
                                       lenders).

                                            Effective  Equity is  defined as the
                                       aggregate of:

                                            (a)  amounts  paid up on issued  and
                                       outstanding shares of all classes;
                                            (b)    retained    earnings; 
                                            (c)  contributed  surplus;
                                            (d) debt  subordinated and postponed
                                       to CIBC and CIBC Inc. (in a manner and on
                                       terms  satisfactory  to such  lenders) to
                                       the prior  repayment and  satisfaction of
                                       all debts  and  liabilities  pursuant  to
                                       this  Agreement,  the  CIBC  Inc.  Credit
                                       Agreement  and the  guarantee  hereunder;
                                       plus 
                                            (e) Special  Shares of your  company
                                       convertible  into the Guarantor's  common
                                       stock;

                                       minus all intangibles including,  but not
                                       limited to goodwill, copyrights, patents,
                                       trademarks,    licences,   research   and
                                       development     costs,    and    deferred
                                       development costs;  provided that for the
                                       purposes    of   this    ratio,    equity
                                       investments in  non-affiliated  companies
                                       will not be  treated  as  intangibles  so
                                       long as the  combined  total  of all such
                                       investments      does     not      exceed
                                       U.S.$20,000,000  (or  any  higher  amount
                                       agreed  to  in  this   regard  by  us  in
                                       writing).
<PAGE>

                                       Profitability: An operating loss must not
                                       be  incurred  in two  consecutive  fiscal
                                       quarters.

                                       Capital      Expenditures      (excluding
                                       acquisitions):        Total       capital
                                       expenditures,    excluding   acquisitions
                                       permitted  below  under  "Restriction  on
                                       Acquisitions",   must  not  exceed   U.S.
                                       $16,000,000   in   fiscal   1997,    U.S.
                                       $20,000,000  in  fiscal  1998,  and  U.S.
                                       $25,000,000  in fiscal  1999  without our
                                       prior written consent (which consent will
                                       not be unreasonably withheld).

<PAGE>

   Other Covenants:                    Restriction on Acquisitions:  Neither the
                                       Guarantor  nor  any of  its  subsidiaries
                                       (including  you) will  make any  material
                                       acquisitions  without  our prior  written
                                       consent,  except,  provided  no  Event of
                                       Default  exists nor will  result from the
                                       proposed  acquisition  during  the fiscal
                                       quarter immediately succeeding the fiscal
                                       quarter within which the  acquisition was
                                       made  (calculated  on  the  basis  of the
                                       financial  statements of the Guarantor on
                                       a  consolidated  basis  submitted for the
                                       fiscal    quarter   of   the    Guarantor
                                       immediately  preceding  the  date  of the
                                       acquisition),  and provided there has not
                                       been (in our reasonable opinion) a Change
                                       of  Control   of  your   company  or  the
                                       Guarantor:

                                       (a)   the   Guarantor,   or  any  of  its
                                       subsidiaries,  may  make  an  acquisition
                                       without our prior written  consent if the
                                       purchase price in respect of the proposed
                                       acquisition    does   not    exceed   the
                                       Applicable Limit referred to below; and

                                       (b) if the  purchase  price in respect of
                                       the  proposed   acquisition  exceeds  the
                                       Applicable  Limit referred to below,  the
                                       Guarantor,  or any  of its  subsidiaries,
                                       may   nevertheless   make  the   proposed
                                       acquisition if you first provide proforma
                                       financial  statements  to us  which  take
                                       into  account the effect of the  proposed
                                       acquisition  and  all  debt  incurred  or
                                       assumed  in  connection  therewith,   and
                                       which  demonstrate  compliance  with  all
                                       financial    covenants/requirements   set
                                       forth  herein,  both before and after the
                                       proposed acquisition.

                                       For the purposes hereof,  the "Applicable
                                       Limit" means  U.S.$40,000,000  unless the
                                       Debt to  Effective  Equity  Ratio  of the
                                       Guarantor   on   a   consolidated   basis
                                       (exclusive  of the  acquisition)  exceeds
                                       1:1, in which case the "Applicable Limit"
                                       means U.S.$20,000,000.

                                       Restriction on  Divestments:  Neither the
                                       Guarantor  nor  any of  its  subsidiaries
                                       (including  you) will  make any  material
                                       business divestment, other than for cash,
                                       without our prior  written  consent.  The
                                       cash    proceeds    from   the   material
                                       divestment  will  be  used  in the  first
                                       instance   to  retire   any   outstanding
                                       borrowings/indebtedness  under the credit
                                       facilities  established  hereunder which,
                                       however,  may be  readvanced  or incurred
                                       subject to your continued compliance with
                                       all of the  terms and  conditions  of the
                                       credit facilities provided for hereunder.
<PAGE>

                                       Negative  Pledge:  Neither the  Guarantor
                                       nor  any of its  subsidiaries  (including
                                       you) will create or allow any Lien on any
                                       of their/your  present or future  assets,
                                       nor will they/you assign any right to any
                                       income,   without   our   prior   written
                                       consent, except you/they are permitted to
                                       enter into lease  commitments or Purchase
                                       Money Liens on normal commercial terms in
                                       the  ordinary  course of  business  up to
                                       U.S.$10,000,000   in  each  fiscal  year,
                                       provided  no Event of Default  exists nor
                                       will the proposed  transaction  give rise
                                       to an  Event  of  Default,  and  provided
                                       there  has not  been  (in our  reasonable
                                       opinion)  a  Change  of  Control  of your
                                       company or the Guarantor.

   Reporting Requirements:             (1)  Within 30 days of each  quarter-end,
                                       you will provide us with the  Guarantor's
                                       consolidated  aged list of trade accounts
                                       receivable as of that quarter-end.

                                       (2)  Within 60 days of the end of each of
                                       the first, second and third quarters, you
                                       will  provide  us  with  a  copy  of  the
                                       Guarantor's   Form   10-Q,   as  of  each
                                       quarter-end.

                                       (3)  Within  120  days  of  each   fiscal
                                       year-end, you will provide us with a copy
                                       of the  Guarantor's  Form 10-K as of that
                                       year-end,  which is to  include a copy of
                                       the  Guarantor's   audited   consolidated
                                       year-end financial statements.


                                Other Provisions

   Indemnity re Reserves,              If the introduction or  implementation of
   Capital Adequacy, Etc.              or any change in or in the interpretation
                                       of, or any change in its  application  to
                                       us  of,  any  law or  any  regulation  or
                                       guideline  issued by any central  bank or
                                       other governmental  authority (whether or
                                       not having  the force of law),  including
                                       without limitation any reserve or special
                                       deposit  requirement  or any  tax  (other
                                       than tax on our  general  income)  or any
                                       capital  requirement,  has  (due  to  our
                                       compliance)   the  effect,   directly  or
                                       indirectly, of (i) increasing the cost to
                                       us   of   performing   our    obligations
                                       hereunder  or under any B/A or L/C;  (ii)

<PAGE>

                                       reducing    any   amount    received   or
                                       receivable   by  us   hereunder   or  our
                                       effective  return  hereunder  or  on  our
                                       capital;  or (iii) causing us to make any
                                       payment or to forgo any  return  based on
                                       any amount  received or  receivable by us
                                       hereunder  or in  respect  of any  B/A or
                                       L/C;  then upon  demand from time to time
                                       you  will  pay  such   amount   as  shall
                                       compensate   us  for   any   such   cost,
                                       reduction, payment or forgone return. You
                                       will   further   indemnify   us  for  all
                                       out-of-pocket  costs, losses and expenses
                                       incurred by us in connection with any B/A
                                       or L/C and  agree  that  we will  have no
                                       liability   to  you  for  any  reason  in
                                       respect  of any  availment  other than on
                                       account of our gross negligence or wilful
                                       misconduct.  Any  certificate  of CIBC in
                                       respect   of  the   foregoing   will   be
                                       conclusive  and binding upon you,  except
                                       for  manifest  error,  provided  that  we
                                       shall  determine  the amounts owing to us
                                       in  good  faith   using  any   reasonable
                                       averaging and attribution methods.

   Obligations re L/Cs if Credit A     You will pay to us on  demand  all of our
   Terminated:                         contingent  liability  in  respect of (i)
                                       any L/C outstanding  upon any termination
                                       of Credit A and (ii) any L/C which is the
                                       subject  matter of any  order,  judgment,
                                       injunction  or other  such  determination
                                       restricting  payment  by us under  and in
                                       accordance with such L/C or extending our
                                       liability   under  such  L/C  beyond  the
                                       expiration   date   stated   therein  (an
                                       "Order").  We agree  that we  will,  with
                                       respect to each such L/C,  upon the later
                                       of:

                                            (a) the  earlier of: (i) the date on
                                       which either the original  counterpart of
                                       such   L/C   is   returned   to  us   for
                                       cancellation  or we are  released  by the
                                       beneficiary from any further  obligations
                                       in  respect  of such L/C;  and,  (ii) the
                                       expiry of such L/C; and

                                            (b) the  date  on  which  any  final
                                       order,    judgment    or    other    such
                                       determination has been rendered or issued
                                       either  terminating the applicable Order,
                                       or  permanently  enjoining us from paying
                                       under such L/C;

                                       pay to you an amount  equal to any excess
                                       of the amount received by us hereunder in
                                       respect of our contingent liability under
                                       such L/C (the "Received Amount") over the
                                       total of amounts  applied to reimburse us
                                       for  amounts  paid by us  under  such L/C
                                       (CIBC having the right to so  appropriate
                                       such funds),  together with an additional
                                       amount computed by applying to the amount
                                       of such  excess  from  time to time a per
                                       annum rate equal to 3% per year less than
                                       the Prime Rate.  Such  additional  amount
                                       shall be calculated daily on the basis of
                                       a calendar  year for the actual number of
                                       days elapsed from and  including the date
                                       of payment to us of the  Received  Amount
                                       to (but not including) the date of return
                                       to you of the excess.
<PAGE>

   Default Interest Rate:              Currently 21% per year.

   Next Scheduled Review Date:         May 31,  1999.  Such  that CIBC may renew
                                       its  commitment by an additional one year
                                       on mutually agreeable terms.

   Termination of Agreement by         This  Agreement  may be terminated by you
   Borrower:                           at any time upon  written  notice to CIBC
                                       and upon payment and  satisfaction of all
                                       of your debts and  liabilities,  absolute
                                       and contingent, to CIBC.

   Standard Credit Terms:              The attached  Schedule - Standard  Credit
                                       Terms (including the revisions  indicated
                                       thereon in bold-faced or struck-out text)
                                       forms part of this Agreement.

   Expenses and Costs:                 All  reasonable  out of  pocket  expenses
                                       incurred by us (excluding any syndication
                                       or  participation  expenses)  will be for
                                       your account.

   Amendment:                          This  Agreement  may only be amended by a
                                       document  executed  by the party  against
                                       whom  enforcement  of  the  amendment  is
                                       sought.

   Assignment:                         You may not assign this Agreement. We may
                                       assign  or  grant  participation  in  our
                                       rights and  obligations  hereunder,  with
                                       each such assignee or  participant  being
                                       entitled  to  rely  on  all   indemnities
                                       contained herein.

   Governing Law:                      This   Agreement  will  be  construed  in
                                       accordance  with the laws of the Province
                                       of  British  Columbia  and  the  laws  of
                                       Canada applicable therein.

   Set-Off:                            Upon  the   occurrence  of  an  Event  of
                                       Default  and  so  long  as the  Event  of
                                       Default  exists,  we may at any  time and
                                       from time to time,  without notice to you
                                       (any such notice being expressly waived),
                                       set-off  and apply  any and all  deposits
                                       (general  or   special)   and  any  other
                                       indebtedness at any time held by or owing
                                       by us to you or for your  credit  or your
                                       account, against and on account of any or
                                       all of your debts and  liabilities  to us
                                       hereunder,   whether  or  not  then  due,
                                       whether   absolute  or  contingent,   and
                                       irrespective  of  the   currency(ies)  in
                                       question.
<PAGE>

   Entire Agreement:                   In accordance  with the scheduled  review
                                       date  set  out  in the  Credit  Agreement
                                       dated  March 11,  1998  issued by CIBC to
                                       you the "Previous Credit Agreement", this
                                       Agreement  extends  the  Previous  Credit
                                       Agreement  and restates the terms thereof
                                       as   set   out   above.   There   are  no
                                       understandings,              inducements,
                                       representations,  warranties,  collateral
                                       agreements  or  conditions  affecting  or
                                       supported by this Agreement other than as
                                       expressed in this Agreement.

   Accounting Terms and GAAP:          All   accounting   terms  not   otherwise
                                       defined  have the  meanings  assigned  to
                                       them in  accordance  with  GAAP.  In this
                                       Agreement,    "GAAP"   means    generally
                                       accepted accounting  principles from time
                                       to time  applicable  in the United States
                                       of America and approved by the  Financial
                                       Accounting   Standards   Board   or   any
                                       successor thereto,  as applied on a basis
                                       consistent with the financial  statements
                                       of the preceding fiscal period, except as
                                       disclosed    therein    or   where    the
                                       inconsistency is immaterial.

   Successors:                         In this  Agreement,  any  reference  to a
                                       corporate  entity  includes and is also a
                                       reference to any corporate entity that is
                                       a  successor  to  such  entity,   whether
                                       immediate or derivative.


Please  indicate  your  acceptance  of these terms by returning a signed copy of
this  Agreement.  If we do not receive a signed copy by June 12, 1998, then this
offer will expire.

     Upon acceptance,  this Agreement extends the Previous Credit Agreements and
restates the terms thereof, as set out above. Outstanding amounts (and security)
under the Previous Credit Agreement will be covered by this Agreement.

Yours truly,
Canadian Imperial Bank of Commerce



by: /S/ Tom Smith
    -------------
Tom Smith
Relationship Manager
Knowledge Based Business
Phone no.: (604) 665-1610
Fax no.:   (604) 665-1144

      Acknowledgement:                 The   undersigned   certifies   that  all
                                       information provided to CIBC is true, and
                                       acknowledges  receipt  of a copy of,  and
                                       accepts  the  terms  of,  this  Agreement
                                       (including   the   attached   Schedule  -
                                       Standard Credit Terms).

                                                                             
                                           Accepted this 10th day of June, 1998.

                                           PMC-Sierra Ltd.

                                           By:    /S/ John W. Sullivan
                                                  ---------------------
                                           Name:  John W. Sullivan
                                                  ----------------
                                           Title: VP Finance
                                                  ----------
<PAGE>

                           Schedule - Standard Credit
CIBC
6326-95/06                    
WP51CRED)

ARTICLE 1 - GENERAL

1.1 Interest  Rate.  You will pay  interest on each Credit at nominal  rates per
year equal to:

  (a) for  amounts  above the Credit  Limit of a Credit or a part of a Credit or
for amounts that are not paid when due, the Default Interest Rate, and

  (b) for any other amounts, the rate specified in this Agreement.

1.2 Variable  interest.  Each  variable  interest  rate  provided for under this
Agreement will change automatically,  without notice, whenever the Prime Rate or
the U.S. Base Rate, as the case may be, changes.

1.3 Payment of  interest.  Interest is  calculated  on the daily  balance of the
Credit  at the end of  each  day.  Interest  is due  once a  month,  unless  the
Agreement states otherwise.  Unless you have made other arrangements with us, we
will  automatically  debit your Operating Account for interest amounts owing. If
your Operating  Account is in overdraft and you do not deposit to the account an
amount  equal to the  monthly  interest  payment,  the effect is that we will be
charging  interest on overdue interest (which is known as  compounding).  Unpaid
interest  continues to compound whether or not we have demanded payment from you
or started a legal action, or get judgment, against you.

1.4 Default  Interest.  To determine  whether Default Interest is to be charged,
the following rules apply:

  (a) Default  Interest  will be charged on the amount  that  exceeds the Credit
Limit of any particular Credit.

  (b) If there are several parts of a Credit,  Default  Interest will be charged
if the Credit Limit of a particular part is exceeded. For example, if Credit A's
limit is  $250,000,  and the limit of one part is $100,000 and the limit of that
part is exceeded by $25,000,  Default  Interest  will be charged on that $25,000
excess,  even if the  total  amount  outstanding  under  Credit  A is less  than
$250,000.

1.5 Fees.  You will pay CIBC's  fees for each  Credit as outlined in the Letter.
You will also reimburse us for all reasonable  fees  (including  legal fees) and
out-of-pocket  expenses  incurred in registering any security,  and in enforcing
our rights under this  Agreement or any security.  We will  automatically  debit
your Operating Account for fee amounts owing.

1.6 Our rights re demand Credits.  At CIBC, we believe that the  banker-customer
relationship  is based on mutual  trust and respect.  It is important  for us to
know all the relevant  information  (whether  good or bad) about your  business.
CIBC is itself a business.  Managing risks and monitoring our customers' ability
to repay is  critical  to us. We can only  continue to lend when we feel that we
are likely to be repaid.  As a result, if you do something that jeopardizes that
relationship,  or if we no longer  feel that you are likely to repay all amounts
borrowed,  we may have to act.  We may decide to act,  for  example,  because of
something you have done,  information we receive about your business, or changes
to the economy that affect your business. Some of the actions that we may decide
to take include requiring you to give us more financial information, negotiating
a change in the interest rate or fees,  or asking you to get further  accounting
assistance, put more cash into the business, provide more security, or produce a
satisfactory  business plan. It is important to us that your business  succeeds.
We  may,  however,  at  our  discretion,   demand  immediate  repayment  of  any
outstanding  amounts under any demand  Credit.  We may also, at any time and for
any cause,  cancel  the  unused  portion  of any  demand  Credit.  Under  normal
circumstances,  however,  we will  give  you 30  days'  notice  of any of  these
actions.

1.7 Payments. If any payment is due on a day other than a Business Day, then the
payment is due on the next Business Day.

1.8 Applying money  received.  If you have not made payments as required by this
Agreement,  or if you have failed to satisfy any term of this  Agreement (or any
other agreement you have that relates to this Agreement),  or at any time before
default  but after we have given you  appropriate  notice,  we may decide how to
apply any money that we receive.  This means that we may choose  which Credit to
apply the money against,  or what mix of principal,  interest,  fees and overdue
amounts within any Credit will be paid.

1.9 Information requirements. We may from time to time reasonably require you to
provide further information about your business. We may require information from
you to be in a form  acceptable  to us.  We will  use your  information  only in
connection with the credits and will keep it confidential  unless required to be
disclosed by law or court order.

1.10 Insurance.  You will keep all your business assets and property insured (to
the full  insurable  value)  against  loss or damage by fire and all other risks
usual for  property  such as yours (plus for any other  risks we may  reasonably
require). If we ask, you will give us either the policies themselves or adequate
evidence of their existence. If your insurance coverage for any reason stops, we
may (but do not have to) insure the property.  We will automatically  debit your
Operating Account for these amounts.  Finally, you will notify us immediately of
any loss or damage to the property.

1.11  Environmental.  You will carry on your business,  and maintain your assets
and  property,  in  accordance  with  all  applicable   environmental  laws  and
regulations.  If (a) there is any  release,  deposit,  discharge  or disposal of
pollutants of any sort  (collectively,  a "Discharge") in connection with either
your business or your property, and we pay any fines or for any clean-up, or (b)
we suffer any loss or damage as a result of any  Discharge,  you will  reimburse
CIBC,  its  directors,  officers,  employees  and agents for any and all losses,
damages,  fines,  costs and other amounts (including amounts spent preparing any
necessary environmental  assessment or other reports, or defending any lawsuits)
that  result.  If we ask,  you  will  defend  any  lawsuits,  investigations  or
prosecutions brought against CIBC or any of its directors,  officers,  employees
and agents in connection  with any Discharge.  Your  obligation to us under this
section continues even after all Credits have been repaid and this Agreement has
terminated.
<PAGE>

1.12  Consent to release  information.  We may from time to time give any credit
information  about you to, or receive such  information  from, (a) any financial
institution,  credit reporting agency,  rating agency or credit bureau,  (b) any
person,  firm or corporation with whom you may have or propose to have financial
dealings,  and (c) any  person,  firm or  corporation  in  connection  with  any
dealings  you have or  propose  to have with us.  You agree that we may use that
information to establish and maintain your relationship with us and to offer any
services as permitted  by law,  including  services and products  offered by our
subsidiaries when it is considered that this may be suitable to you.

1.13 Our pricing policy: Fees, interest rates and other charges for your banking
arrangements are dependent upon each other. If you decide to cancel any of these
arrangements,  you will have to pay us any  increased  or added  fees,  interest
rates and  charges we  determine  and notify you of.  These  increased  or added
amounts are effective from the date of the changes that you make.

1.14 Proof of debt. This Agreement provides the proof,  between CIBC and you, of
the credit made available to you. There may be times when the type of Credit you
have  requires you to sign  additional  documents.  Throughout  the time that we
provide  you credit  under this  Agreement,  our loan  accounting  records  will
provide  complete  proof of all terms and  conditions  of your  credit  (such as
principal loan balances, interest calculations, and payment dates).

1.15 Renewals of this  Agreement.  This Agreement will remain in effect for your
Credits for as long as they  remain  unchanged.  We have shown a Next  Scheduled
Review Date in the Letter. If there are no changes to the Credits this Agreement
will continue to apply, and you will not need to sign anything further. If there
are any changes, we will provide you with either an amending agreement, or a new
replacement Letter, for you to sign.

1.16  Confidentiality:  The terms of this Agreement are confidential between you
and CIBC. You therefore  agree not to disclose the contents of this Agreement to
anyone  except  your  professional  advisors  or (as  required  by  law)  to any
regulatory or governmental body.

1.17 Pre-conditions. You may use the Credits granted to you under this Agreement
only if:

  (a) we have received properly signed copies of all  documentation  that we may
reasonably  require  and which we have  provided to you in  connection  with the
operation of your accounts and your ability to borrow;
  (b)  all the  required  security  has  been  received  and  registered  to our
satisfaction;
  (c) any special  provisions  or  conditions  set forth in the Letter have been
complied with; and
  (d) if applicable,  you have given us the required number of days notice for a
drawing under a Credit.

1.18 Notices. We may give you any notice in person or by telephone, or by letter
that is sent either by fax or by mail.

1.19 Use of the Operating  Line.  You will use your Operating Line only for your
business  operating  cash  needs.  You are  responsible  for all debits from the
Operating  Account  that you  have  either  initiated  (such  as  cheques,  loan
payments,  pre-authorized  debits,  etc.) or authorized us to make. Payments are
made by making deposits to the Operating Account. You may not at any time exceed
the  Credit  Limit.  We may,  without  notice to you,  return any debit from the
Operating  Account  that,  if paid,  would  result  in the  Credit  Limit  being
exceeded,  unless  you have made  prior  arrangements  with us. If we pay any of
these debits, you must repay us immediately the amount by which the Credit Limit
is exceeded.

1.20 Foreign Currency  Conversion.  If this Agreement  includes foreign currency
Credits, then currency changes may affect whether either the Credit Limit of any
Credit or the Overall Credit Limit has been exceeded.

  (a)  See  section  1.4  for the  general  rules  on how  Default  Interest  is
calculated.

  (b) To determine the Overall Credit Limit,  all foreign  currency  amounts are
converted  to  Canadian  dollars,  even if the Credit  Limits of any  particular
Credits are quoted  directly in a foreign  currency (such as U.S.  dollars).  No
matter  how the  Credit  Limit of a  particular  Credit  is  quoted,  therefore,
currency  fluctuations  can affect  whether  the Overall  Credit  Limit has been
exceeded.  For example,  if Credits X and Y have Credit  Limits of C$100,000 and
US$50,000,  respectively, with an Overall Credit Limit of C$175,000, if Credit X
is at C$90,000 and Credit Y is at  US$45,000,  Default  Interest will be charged
only if, after  converting  the US dollar  amount,  the Overall  Credit Limit is
exceeded.

  (c) Whether the Credit Limit of a  particular  Credit has been  exceeded  will
depend on how the Credit Limit is quoted, as described below.

  (d) If the Credit Limit is quoted as, for example,  the U.S. dollar equivalent
of a Canadian dollar amount, daily exchange rate fluctuations may affect whether
that Credit Limit has been exceeded.  If, on the other hand, the Credit Limit is
quoted in a foreign currency (for example, directly in US dollars), whether that
Credit Limit has been exceeded is  determined  by reference  only to the closing
balance of that Credit in that currency.

  (e) For example, assume an outstanding balance of a Credit on a particular day
of  US$200,000.  If the Credit Limit is stated as "the US dollar  equivalent  of
C$275,000",  then whether the Credit Limit of that Credit has been exceeded will
depend  on the value of the  Canadian  dollar  on that  day.  If the  conversion
calculations determine that the outstanding balance is under the Credit Limit, a
drop in the value of the Canadian dollar the next day (without any change in the
balance) may have the effect of putting that Credit over its Credit  Limit.  If,
on the other hand, the Credit Limit is stated as "US$200,000",  the Credit Limit
is not  exceeded,  and a drop in the value of the  dollar  the next day will not
change that (although the Overall Credit Limit may be affected).
<PAGE>

  (f)  Conversion  calculations  are done on the  closing  daily  balance of the
Credit.  The  conversion  factor  used is the  mid-point  between the buying and
selling rate offered by CIBC for that currency on the conversion date.

1.21  Instalment Loans.  The following terms apply to each Instalment Loan.

  (a) Non-revolving loans. Unless otherwise stated in the Letter, any Instalment
Loan is  non-revolving.  This means that any principal  payment made permanently
reduces the  available  Loan Amount.  Any payment we receive is applied first to
overdue  interest,  then to current interest owing,  then to overdue  principal,
then to any fees and charges owing, and finally to current principal.

  (b) Floating Rate Instalment  Loans.  Floating Rate Instalment  Loans may have
either (i) blended  payments or (ii) payments of fixed principal  amounts,  plus
interest, as described below.

      (i) Blended  payments.  If you have a Floating  Rate Loan that has blended
      payments,  the amount of your monthly payment is fixed for the term of the
      loan,  but the interest rate varies with changes in the Prime or U.S. Base
      Rate (as the case may be). If the Prime or U.S. Base Rate during any month
      is lower than what the rate was at the  outset,  you may end up paying off
      the loan before the scheduled  end date.  If,  however,  the Prime or U.S.
      Base  Rate  is  higher  than  what it was at the  outset,  the  amount  of
      principal that is paid off is reduced.  As a result,  you may end up still
      owing  principal  at the end of the term  because of these  changes in the
      Prime or U.S. Base Rate.

      (ii) Payments of principal plus interest. If you have a Floating Rate Loan
      that has regular principal payments,  plus interest, the principal payment
      amount of your Loan is due on each payment  date  specified in the Letter.
      The interest  payment is also due on the same date, but it is debited from
      your  Operating  Account  one or two  banking  days  later.  Although  the
      principal  payment amount is fixed,  your interest payment will usually be
      different each month, for at least one and possibly more reasons,  namely:
      the  reducing  principal  balance of your loan,  the number of days in the
      month,  and  changes to the Prime Rate or U.S.  Base Rate (as the case may
      be).

  (c)  Prepayment.  Unless  otherwise  agreed,  the  following  terms  apply  to
prepayment of any Instalment Loan:

      (i)  Floating  Rate  Instalment  Loans.  You may  prepay  all or part of a
      Floating Rate Instalment Loan (whether it is a Demand or a Committed Loan)
      at any time without notice or penalty.

      (ii) Fixed Rate  Instalment  Loans.  You may prepay all or part of a Fixed
      Rate Instalment Loan, on the following condition.  You must pay us, on the
      prepayment date, a prepayment fee equal to the interest rate  differential
      for the remainder of the term of the Loan, in accordance with the standard
      formula used by CIBC in these situations.

  (d) Demand of Fixed Rate  Demand  Instalment  Loans.  If you have a Fixed Rate
Demand  Instalment Loan and we make demand for payment,  you will owe us (i) all
outstanding  principal,  (ii)  interest,  (iii) any other  amount due under this
Agreement,  and  (iv) a  prepayment  fee.  The  prepayment  fee is  equal to the
interest  rate  differential  for the  remainder  of the  term of the  loan,  in
accordance with the standard formula used by CIBC in these situations.

1.22 Notice of Default.  You will  promptly  notify us of the  occurrence of any
event that is an Event of  Default  (or any that would be an Event of Default if
the only thing required is either notice being given or time elapsing, or both).

ARTICLE 1 - BANKERS' ACCEPTANCES

1.1  Definitions.  In this  Article,  the  following  terms  have the  following
meanings:

"Bankers'  Acceptance"  or "B/A"  means a  Canadian  dollar  Draft  that we have
accepted under this Agreement.

"Commerce  Acceptance  Rate" means the variable  reference  rate that we declare
from time to time as our stamping or acceptance fee for Drafts accepted by us.

"Draft" means,  at any time, a blank bill of exchange  within the meaning of the
Bills of Exchange Act drawn by the Customer on us (in  satisfactory  form),  but
before we have accepted it.

1.2  Availability.  B/As are available only with terms to maturity of between 30
and 180 days.

1.3 Minimum issue amount.  You will present  Drafts for  acceptance in a minimum
amount of $1 million.  We can change this minimum amount at any time by 30 days'
prior written notice.

1.4  Required  Notice.  You may  either  obtain a new  advance  by issuing a B/A
stamped by CIBC  (including a rollover of an existing B/A) or you may convert an
amount  outstanding  under another  Credit to issuance of a B/A on the following
terms.  You  must  give us  notice  (in the  form we  require,  including,  when
applicable,  the date of acceptance,  the amount and the maturity date).  Notice
must be given by 10:00 a.m. (local time where the CIBC Branch/Centre is located)
on the Business Day prior to the requested date of issuance.  You must also give
us any other notice required by the Letter.
<PAGE>

1.5   Special Conditions.

  (a) Draft  Conditions.  You will  deliver to us the Drafts that you want us to
issue.  Each Draft must (i) be in a whole  multiple of C$100,000,  (ii) be dated
the date of  delivery  (which  will be the same date as the  requested  date you
notified us);  (iii) mature on a Business Day; and (iv) be presented to the CIBC
Branch/Centre  for acceptance by 12:00 noon on the date of delivery  (unless you
have made prior arrangements in writing with us).

  (b)  Maturity  Limitation.  The maturity  date of a Draft  submitted to us for
acceptance  may not (i) be after a  scheduled  or  mandatory  final  maturity or
termination  date for that Credit or (ii)  conflict,  in our  opinion,  with any
scheduled or mandatory repayment for that Credit.

(c)  Conversion-To-Loan  Limitation.  You may  only  convert  a B/A  into a loan
otherwise allowed under this Agreement if the total of "A" plus "B" is less than
Prime Rate existing on that maturity date, where:

      "A" is the annual discount rate quoted at 9:30 a.m.  (Toronto time) by the
      Toronto  office of Wood Gundy Inc. as the discount  rate at which it would
      purchase a bankers' acceptance issued by CIBC having a term to maturity of
      30 days, and

      "B" is the  annual  stamping  or  acceptance  rate  applicable  to a Draft
      accepted by us under this Agreement, as determined on the maturity date of
      that B/A.

In making these calculations, each of "A" and "B" is expressed as a percentage.

1.6 Stamping Fee. When we accept a Draft under this Agreement, you will pay us a
stamping fee, on the date of acceptance, in the amount as set out in the Letter.
The  stamping  fee will be  calculated  on the face amount of that Draft for the
number of days to maturity based on a 365 day year.

1.7  Reimbursement.  B/As  are  negotiable  instruments  that are  purchased  in
financial  markets at a discount.  Market  forces  determine  what the  discount
amount for B/As is at any  particular  time.  At  maturity,  the holder of a B/A
redeems  it from  CIBC.  We then pay the  holder  the  face  amount.  You  will,
therefore,  reimburse  us at the  maturity  date for the face amount of all B/As
that we have  accepted  for you,  unless you  convert  those  amounts to another
Credit  (assuming all proper notice has been given).  If you do not reimburse us
or convert those amounts to another  Credit,  we may convert them to any type of
loan (if available) under any Credit.

1.8 Signatures and  Safekeeping.  All Drafts must either be signed by a properly
authorized signing officer or bear a mechanically reproduced facsimile signature
of that officer (subject to any prior written  arrangements with us). Each Draft
and B/A bearing a facsimile  signature of that officer will be as binding on you
as if it had  been  manually  signed  by that  officer.  This  applies  even for
individuals  who may no longer be  authorized  or otherwise be an officer at any
time.  You will  compensate us for any loss or expense  relating to any Draft or
B/A that we deal with  under  this  Agreement.  We need only  exercise  the same
degree  of  care in  safekeeping  executed  Drafts  delivered  to us for  future
acceptance as if they were CIBC's property and we were keeping them at the place
at which they are to be held.

1.9 Credit Cancellation. If your B/A Credit is terminated for any reason, we may
require you to pay us immediately on demand the appropriate reimbursement amount
for each B/A then  outstanding.  We will calculate the  reimbursement  amount in
accordance  with  standard  practice  in the banking  industry in Canada.  After
making this  payment,  (a) you will have no further  liability for that B/A, and
(b) we will (i) become the sole party liable under the B/A, and (ii)  compensate
you if you have to pay anyone else under that B/A.

1.10 Waiver.  You will not claim any days of grace for the payment of a B/A. You
waive any defence to payment which might otherwise exist if for any reason a B/A
is held by us in our own right at its maturity.

1.11   Obligations   Absolute.   Your   obligations  for  Drafts  and  B/As  are
unconditional  and irrevocable.  You will perform your  obligations  strictly in
accordance with the provisions of this Agreement including,  among other things,
(a) any lack of validity or  enforceability  of a Draft accepted by us as a B/A,
and (b) the existence of a claim, set-off,  defence or other right which you may
have against the holder of a B/A, CIBC or another person.


ARTICLE 2 - LIBO RATE PROVISIONS

2.1  Definitions.  In this  Agreement,  the  following  terms have the following
meanings:

"LIBO Rate" for any LIBOR  Period means a rate of interest per year equal to the
rate at which we are prepared to offer, as at 11:00 a.m. (London,  England time)
on the second LIBOR Business Day before the start of that LIBOR Period, deposits
to leading banks in London,  England interbank  eurocurrency market in an amount
of U.S.  dollars  similar to the amount of the  applicable  LIBOR Loan and for a
deposit  period  comparable  to that LIBOR  Period;  except  that,  if we do not
receive  proper or timely  notice as required  below but we permit your request,
then the LIBOR Rate for such LIBOR Period means the rate of interest per year as
determined by us (in our absolute discretion) and offered to you and immediately
accepted by you.

"LIBOR Business Day" means a Business Day on which U.S. dollar  transactions can
be carried out between  leading  banks in the interbank  eurocurrency  market in
London, England and between CIBC and other leading banks in New York City.

<PAGE>

"LIBOR  Loan"  means a Fixed  Rate Loan in U.S.  dollars in whole  multiples  of
US$1,000,000 on which interest is calculated by reference to a LIBO Rate.

"LIBOR  Period"  means  the  period  selected  by you in  accordance  with  this
Agreement for computing interest from time to time on a LIBOR Loan.

2.2  Availability.  LIBOR  Loans  are  available  only  in  whole  multiples  of
US$1,000,000 each, for terms of one to six months.

2.3   Required Notice.

  (a) You may draw down or roll over a LIBOR Loan,  or convert  another  type of
Credit under this  Agreement to a LIBOR Loan, or repay a LIBOR Loan, but only as
provided in this Article.  Any such action must be done on a LIBOR Business Day.
Also,  you must give notice (in the form we  require) to the CIBC  Branch/Centre
before 10:00 a.m.  (local time where the CIBC  Branch/Centre  is  located).  The
notice must be given on the third LIBOR  Business Day before the requested  date
of drawdown, rollover,  conversion or repayment. You may roll over or convert an
existing LIBOR Loan only on the expiry of its LIBOR Period.

  (b) If we do not receive  proper or timely notice as required by the preceding
paragraph,  we may (but we are not obliged to) decide what you are  permitted to
do for that LIBOR Loan. We may, on the other hand,  simply roll over an existing
LIBOR Loan at the end of its LIBOR  Period for a new LIBOR Loan with a new LIBOR
Period determined by us.

2.4  Maturity  Limitation.  The expiry date of a LIBOR Period for any LIBOR Loan
may not (a) be after a scheduled or required  maturity or  termination  date for
that Credit or (b)  conflict,  in our opinion,  with any  scheduled or mandatory
repayment for that Credit.

2.5 Repayments.  You may only repay all (but not part) of a LIBOR Loan, and only
on the last day of the LIBOR Period for that LIBOR Loan.

2.6 Interest Calculation and Payment. Interest at a LIBO Rate will be calculated
on the daily  balance of each LIBOR Loan for the actual  number of days elapsed,
on the basis of a 360 day year.  You will pay  interest  on each  LIBOR  Loan in
arrears at the end of each LIBOR Period. If a LIBOR Period is greater than three
months,  you will pay interest at the end of each three month period during that
LIBOR  Period,  except that  overdue  interest  will be payable  immediately  on
demand.  Overdue  amounts  in respect of a LIBOR  Loan  (including  any  overdue
interest)  may at our option be either  converted  to  another  type of loan (if
available)  under any  Credit or  considered  to be a LIBOR Loan for one or more
LIBOR Periods as we may determine.

2.7  Interest  Act.  Each nominal  rate of interest  referenced  to a LIBO Rate,
expressed as an annual rate for purposes of the Interest Act  (Canada),  is that
rate  multiplied  by the actual number of days in the calendar year in which the
rate is to be ascertained, and divided by 360.

2.8 Lack of LIBO  Rate.  At any time  before the start of any LIBOR  Period,  we
might  determine  that (a) by  reason of  circumstances  affecting  the  London,
England interbank eurocurrency market generally,  adequate and fair means do not
exist for  determining  the LIBO Rate  applicable for that LIBOR Period,  or (b)
deposits in U.S. dollars are not in the ordinary course of business available to
CIBC in that market for deposit  periods  comparable  to that LIBOR  Period in a
total amount  similar to that LIBOR Loan  bearing  interest at a rate no greater
than the LIBO Rate  applicable to that LIBOR Loan. If we do, then from and after
that date, you may not roll over any existing LIBOR Loan at the end of its LIBOR
Period, or obtain any new LIBOR Loan. Our determination of any events under this
paragraph will be conclusive.

2.9  Illegality.  If at any time we  determine  in good  faith  that  any  legal
requirement  or any  official  directive  or request  (whether or not having the
force of law) by a central  bank or other  governmental  authority  will make it
unlawful or impossible for us to make,  maintain or fund any LIBOR Loan, we will
notify you accordingly. Upon receiving such a notice, you will either (a) on the
last day of the LIBOR  Period of any LIBOR Loan,  if we can continue to maintain
that loan, or (b) immediately, if we cannot legally maintain that loan,
  (1) pay us in full the then  outstanding  principal  amount of each such LIBOR
Loan, together with all accrued interest, or

  (2) convert that loan into another type of loan allowed under this Agreement.

For clarification,  upon a payment or conversion of a LIBOR Loan made under this
section  in the  middle  of its LIBOR  Period,  you will  immediately  on demand
compensate us as provided elsewhere in this Agreement.  Our determination of any
matters under this paragraph will be conclusive.


ARTICLE 3 - DEFINITIONS

3.1  Definitions.  In this  Agreement,  the  following  terms have the following
meanings:

"Base Rate Loan" means a U.S.  dollar loan on which  interest is  calculated  by
reference to the U.S. Base Rate.

"Business  Day" means any day (other than a Saturday or a Sunday)  that the CIBC
Branch/Centre is open for business.

"CIBC  Branch/Centre" means the CIBC branch or banking centre noted on the first
page of this  Agreement,  as changed from time to time by agreement  between the
parties.
<PAGE>

"Committed Loan" means a Loan (including an operating  line)that is repayable in
full only upon the earlier of the expiry of the committed  term of the Loan, the
occurrence of an Event of Default,  or there having  occurred (in our reasonable
opinion) a Change of Control (as  defined in the Letter) of your  company or the
Guarantor. Such a Loan may be either at a fixed or a floating rate of interest.

"Credit"  means any credit  referred to in the  Letter,  and if there are two or
more parts to a Credit, "Credit" includes reference to each part.

"Credit  Limit" of any Credit  means the amount  specified  in the Letter as its
Credit  Limit,  and if there are two or more parts to a Credit,  "Credit  Limit"
includes reference to each such part.

"Default  Interest  Rate",  unless  otherwise  defined in the Letter,  means the
Standard Overdraft Rate.

"Demand  Instalment  Loan" means an Instalment Loan that is payable upon demand.
Such a Loan may be either at a fixed or a floating rate of interest.

"Event of Default"  means,  in connection  with any Committed Loan (even if that
Loan has not yet been drawn),  the occurrence of any of the following events (or
the occurrence of any other event of default described in this Agreement, in any
of the security  documents or in any other agreement or document you have signed
with us):

  (1) You do not pay, when due, any amount that you are required to pay us under
this Agreement or otherwise and such failure is not remedied within 5 days after
notice,  or you do not  perform any of your other  obligations  to us under this
Agreement or otherwise  and such failure (if curable) is not remedied  within 10
days after notice.

  (2) Any part of the security terminates or is no longer in effect, without our
prior written consent.

  (3) You cease to carry on your business in the normal course, or it reasonably
appears to us that that may happen.

  (4) A representation  that  you  have  made  (or  deemed  to have  made in any
certificate or document delivered to CIBC hereunder) in this Agreement or in any
security agreement is incorrect or misleading in any material respect.

  (5) (i) An  actual  or  potential  default  or  event  of  default  occurs  in
connection  with any debt owed by you or by the Guarantor  (including any actual
or potential default or event of default under the CIBC Inc. Credit  Agreement),
with the  result  that the  payment  of the debt has  become,  or is  capable of
becoming,  accelerated, or (ii) you do not make a payment when due in connection
with any such  debt  after the  expiry of any  applicable  grace  period.  (This
subsection (5), however,  applies only to amounts that we reasonably consider to
be material.)


  (6) We believe, in good faith and upon commercially  reasonable grounds,  that
all or a material part of your property is or is about to be placed in jeopardy.

  (7) The holder of a Lien or a receiver or similar official takes possession of
all or a material  part of your  property;  or a  distress,  execution  or other
similar process is levied against any such property.

  (8) You (i) become  insolvent;  (ii) are unable generally to pay your debts as
they  become  due;  (iii) make a  proposal  in  bankruptcy,  or file a notice of
intention to make such a proposal;  (iv) make an assignment in  bankruptcy;  (v)
bring a court action to have yourself declared insolvent or bankrupt; or someone
else brings an action for such a declaration;  or (vi) you default in payment or
breach any other material obligation to any of your other creditors.

  (9) If you are a corporation, (i) you are dissolved; (ii) your shareholders or
members pass a resolution for your winding-up or liquidation; (iii) someone goes
to court  seeking your  winding-up  or  liquidation,  or the  appointment  of an
administrator,  conservator,  receiver,  trustee,  custodian  or  other  similar
official for you or for all or substantially  all your assets;  or (iv) you seek
protection under any statute offering relief against the company's creditors.

"Fixed Rate Instalment  Loan" means an Instalment Loan that is also a Fixed Rate
Loan.

"Fixed  Rate Loan"  means any loan drawn down,  converted  or  extended  under a
Credit at an interest rate which was fixed for a term,  instead of referenced to
a variable  rate such as the Prime Rate or U.S.  Base Rate,  at the time of such
drawdown,  conversion or extension. For purposes of certainty, a Fixed Rate Loan
includes a LIBOR Loan.

"Floating Rate Instalment Loan" means either an Instalment Loan that is either a
Prime Rate Loan or a Base Rate Loan.

"Instalment  Loan" means a loan that is repayable either in fixed instalments of
principal,  plus  interest,  or in blended  instalments  of both  principal  and
interest.  A  Demand  Instalment  Loan  is  repayable  on  demand.  A  Committed
Instalment Loan is repayable only upon the occurrence of an Event of Default.

"Letter" or "Agreement" means the letter agreement between you and CIBC to which
this Schedule and any other Schedules are attached and includes the schedule(s).
<PAGE>

"Letter of Credit" or "L/C" means a documentary or stand-by letter of credit,  a
letter of guarantee,  or a similar instrument in form and substance satisfactory
to us.

"L/C  Acceptance"  means a draft (as  defined  under the Bills of  Exchange  Act
(Canada))  payable  to the  beneficiary  of a  documentary  L/C  which  the  L/C
applicant or beneficiary, as the case may be, has presented to us for acceptance
under the terms of the L/C.

"Lien" includes a mortgage,  charge,  lien,  security interest or encumbrance of
any sort on an asset, and includes conditional sales contracts,  title retention
agreements, capital trusts and capital leases.

"Normal  Course Lien" means a Lien that (a) arises by operation of law or in the
ordinary  course of  business as a result of owning any such asset (but does not
include a Lien given to another  creditor to secure debts owed to that creditor)
and (b), taken together with all other Normal Course Liens,  does not materially
affect the value of the asset or its use in the business.

"Operating  Account"  means the account that you normally use for the day-to-day
cash needs of your business,  and may be either or both of a Canadian dollar and
a U.S. dollar account.

"Prime Rate" means the variable  reference rate of interest per year declared by
CIBC from time to time to be its prime rate for  Canadian  dollar  loans made by
CIBC in Canada.

"Prime Rate Loan" means a Canadian  dollar loan on which  interest is calculated
by reference to Prime Rate.

"Purchase  Money Lien" means a Lien incurred in the ordinary  course of business
only to secure all or part of the purchase price of an asset,  or to secure debt
used only to finance all or part of the purchase of the asset.

"Standard  Overdraft Rate" means the variable  reference  interest rate per year
declared  by  CIBC  from  time  to time  to be its  standard  overdraft  rate on
overdrafts in Canadian or U.S. dollar accounts maintained with CIBC in Canada.

"U.S. Base Rate" means the variable reference interest rate per year as declared
by CIBC from time to time to be its base rate for U.S. dollar loans made by CIBC
in Canada.




                                  SHARE PLEDGE

     This Share Pledge dated as of March 11, 1998 made by PMC-SIERRA,  INC. (the
"Corporation"), a corporation incorporated under the laws of Delaware, to and in
favour of CIBC  INC.  (the  "Lender"),  as lender  under  the  Credit  Agreement
hereinafter referred to.

WHEREAS:

A.   The  Corporation  has entered into a credit  agreement dated as of the date
hereof with the Lender (as such  agreement  may at any time or from time to time
be  amended,  supplemented  or  otherwise  modified  or  restated,  the  "Credit
Agreement")  and the  Corporation  has guaranteed by a guarantee dated as of the
date hereof all  indebtedness,  liabilities and obligations of PMC - Sierra Ltd.
("PMC") to Canadian  Imperial Bank of Commerce ("CIBC") under a credit agreement
between PMC and CIBC dated as of the date hereof.

B.   The  Corporation  is as at the date  hereof the holder of all of the issued
and outstanding  voting shares in the capital of PMC and has agreed to pledge in
favour of the Lender those shares  described in Schedule A hereto (the shares in
Schedule A hereto are referred to, collectively, as the "Shares").

C.   It is a  condition  of the  advance of the said  credit  facilities  by the
Lender to the Corporation  that the  Corporation  execute and deliver this Share
Pledge  together  with the  share  certificates  representing  the  Shares  (the
"Certificates"),  duly endorsed in blank for  transfer,  to and in favour of the
Lender  as  security  for  the  payment  and  performance  of all  indebtedness,
liabilities and obligations of the Corporation to the Lender hereunder and under
the Credit  Agreement  as well as other  dealings by which the  Corporation  may
become indebted or liable to the Lender in any manner whatsoever pursuant to the
Credit Agreement (the "Obligations").

     NOW THEREFORE  WITNESSETH that in consideration of these premises and other
good and valuable consideration,  the receipt and sufficiency of which is hereby
acknowledged by the Corporation, the Corporation covenants,  declares and agrees
as follows:

1.   Definitions.  All terms  defined in the Credit  Agreement and not otherwise
defined  herein or in the  recitals  hereto shall have the  respective  meanings
attributed to them in the Credit Agreement.

2.   Pledge of  Shares.  The Corporation  hereby  assigns,  mortgages,  charges,
hypothecates  and pledges to and  deposits  with the  Lender,  and grants to the
Lender a security interest in, the Shares and the Certificates together with all
replacements  thereof,  substitutions  therefor,  accretions  thereto,  interest
thereon and proceeds  thereof,  including,  without  limitation,  any dividends,
income or revenue therefrom (the whole being herein called the "Pledge"),  to be
held by the Lender as general and continuing collateral security for the payment
and performance of the Obligations.

3.   Representations and Warranties.  The Corporation represents and warrants to
the Lender that:  (i) the Shares are free and clear of all  mortgages,  charges,
security interests,  Liens and other  encumbrances;  (ii) the Corporation is the
beneficial  owner of the Shares;  and (iii) the Corporation is entitled to grant
the assignment and charges as provided for herein.
<PAGE>

4.   Delivery of Certificates.  The Certificates  endorsed in blank for transfer
shall  forthwith  be delivered to and remain in the custody of the Lender or its
nominee. Upon an Event of Default or any other act which would permit the Lender
to demand  payment of the  Obligations,  any or all Shares may, at the option of
the  Lender,  be  registered  in the  name of the  Lender  or its  nominee.  The
Corporation  covenants to deliver such stock powers and similar  documents  with
respect to the Shares as the Lender or its nominee may  reasonably  from time to
time request,  satisfactory in form and substance to the Lender.  If the charter
documents of PMC restrict the transfer of the Shares of such  company,  then the
Corporation  shall also deliver to the Lender a resolution  of the  directors or
shareholders of such company consenting to the transfer(s)  contemplated by this
Pledge.

5.   Realization  of the Shares.  Upon the failure of the  Corporation to pay or
perform any of the Obligations on demand or otherwise when due and payable or to
be performed,  as the case may be or upon the  occurrence of an Event of Default
or any  other act which  would  permit  the  Lender  to  demand  payment  of the
Obligations,  the Lender or its agent may realize upon or otherwise deal with or
dispose  of the  Shares by public or  private  sale,  transfer  or  delivery  or
exercise and enforce all rights and remedies of a holder of the Shares as if the
Lender  were   absolute   owner  thereof  for  such  price  in  money  or  other
consideration  and upon such terms and  conditions as it deems best,  the whole,
without  notice  to or  control  by the  Corporation.  Any  such  remedy  may be
exercised  separately or in  combination  and shall be in addition to and not in
substitution for any other rights the Lender may have, however created, provided
that the Lender  shall not be bound to  exercise  any such right or remedy.  The
Lender shall not be bound under any circumstances to realize upon the Shares and
neither the Lender nor its agents shall be responsible  for any loss  occasioned
by any sale or other dealing with the Shares permitted by and made in accordance
with law, or by the  retention of or delay or failure to sell or otherwise  deal
with or  dispose  of the  Shares  and the  Lender  is hereby  released  from all
responsibility  for any  depreciation  in or loss in value  which the Shares may
suffer.

6.   Power of  Attorney.  From and after the date of an Event of  Default or any
other act which would  permit the Lender to demand  payment of the  Obligations,
the Corporation hereby authorizes and empowers the Lender or any officer thereof
as attorney for the Corporation to sign any transfer or other document necessary
to complete  the  transfer  of any of the Shares.  The Lender may grant time for
payment or any other indulgence,  take and give up securities,  and may compound
with,  grant  releases  and  discharges  and  otherwise  deal  with  PMC and the
Corporation and with other persons and the Shares and Certificates as the Lender
may see fit without liability to the Corporation for any loss thereby occasioned
to the  Corporation.  So long as any  amount  remains  unpaid in  respect of the
Obligations  after the  occurrence of an Event of Default or any other act which
would permit the Lender to demand payment of the  Obligations,  the  Corporation
hereby irrevocably appoints the Lender or any officer thereof as its attorney in
the name of the Corporation  with full powers of  substitution,  but for the use
and benefit of the Lender,  to do all such acts and take all such proceedings as
the Lender may from time to time think  advisable  to realize upon the Shares in
accordance  with the terms hereof and to enforce the rights hereby  assigned and
obtain possession of and realize upon the property hereby assigned.
<PAGE>

7.   Dealing  with the  Shares  and the Lien  hereof.  The  Lender  shall not be
obliged to exhaust  its  resources  against  the  Corporation,  PMC or any other
person or persons or against  any other  security  it may hold in respect of the
Obligations before the Lender may realize upon or otherwise deal with the Shares
or Certificates in such manner as the Lender may consider desirable.  The Lender
may grant extensions or other indulgences,  take and give up securities,  accept
compositions,  grant releases and discharges and otherwise deal with PMC and the
Corporation  and with other  parties,  sureties or  securities as it may see fit
without  prejudice to the  Obligations or the rights of the Lender in respect of
this Pledge.

8.   Costs of Realization. All costs and charges incurred by or on behalf of the
Lender with reference to the Shares or the  realization  thereof  (including all
reasonable  legal fees and  disbursements,  on a solicitor and own client basis,
all court costs and expenses of taking  possession of,  protecting and realizing
upon the  security  constituted  by the  Shares  and the  costs and  charges  in
connection  with realizing,  collecting,  selling,  transferring,  delivering or
obtaining  payment  of the  Shares)  shall  be  added  to and form a part of the
Obligations  and  shall  be a  first  charge  upon  the  proceeds  of  any  such
realization, collection, sale, transfer, delivery or obtaining of payment.

9.   Application  of Moneys.  Any  proceeds of the Shares may be held in lieu of
Shares  realized  upon and may,  as and when the Lender  sees fit, be applied or
appropriated  as the  Lender may elect on  account  of the  Obligations  and the
balance,  if any,  shall be paid to the  Corporation  or as a court of competent
jurisdiction may direct.  If there shall be a deficiency,  then, the Corporation
shall  remain  liable  for such  deficiency  and  shall  pay the  amount of such
deficiency to the Lender forthwith.

10.  Share Rights.  Until such time, if ever, as this Pledge shall be discharged
and the Shares and Certificates released to the Corporation, the Lender shall be
entitled to receive and enjoy all dividends or other distributions made on or in
respect of the Shares and to exercise  all option,  conversion,  voting or other
like rights attaching  thereto but shall not be bound or required to collect any
interest,  dividends,  income or revenue payable in respect of any of the Shares
or vote in respect of the Shares,  and the Lender shall not be  responsible  for
any loss occasioned by the exercise of any such rights or by failure to exercise
same.  Any  interest,  dividends,  income or  revenue  payable in respect of the
Shares,  if received by the Corporation,  shall forthwith be paid to the Lender.
Notwithstanding  the  foregoing,  so long as no Event of Default has occurred or
any other act which would permit the Lender to demand payment of the Obligations
has occurred, and subject to the terms of the Credit Agreement,  the Corporation
shall be entitled to receive and enjoy all dividends or other distributions made
on or in respect of the shares and to vote or refrain  from voting the Shares at
any meeting,  whether  special or general,  at which the holder of the Shares is
entitled  to vote and will be  entitled to take part in or consent to or refrain
from taking part in or consenting to any corporate or shareholder's action which
the holder of the Shares is entitled to take part in or consent;  provided  that
the  exercise  of such  right to vote or to take part in or  consent to any such
corporate or  shareholder's  action would not result in a  contravention  of any
covenant or  agreement  of the  Corporation  to the Lender  hereunder  or to the
Lender under the Credit  Agreement or under any other  agreement  evidencing  or
securing any of the Obligations.
<PAGE>

11.  Share  Alteration.  In the event of any subdivision,  consolidation,  share
exchange,  stock dividend,  redivision,  share issue or change in the capital of
PMC or other similar action during the period that this Pledge remains in effect
resulting in an increase in the number of voting shares held by any person,  the
number of  voting  shares  to be  delivered  by the  Corporation  to the  Lender
pursuant to this Pledge shall be increased (the "Additional Shares") so that the
Lender will at all times have assigned,  mortgaged,  charged,  hypothecated  and
pledged  hereunder,  deposited with and a security interest in the lesser of (i)
65% (less any fractional  values) of the issued and outstanding voting shares in
the capital of PMC and (ii) 100% of the issued and outstanding  voting shares in
the  capital  of PMC  held  by the  Corporation  from  time  to  time,  and  the
Corporation  agrees to deliver  such  Additional  Shares  endorsed  in blank for
transfer to the Lender and the  Additional  Shares shall form part of the Shares
and shall be  subject  to the  charges  and  other  provisions  of this  Pledge;
provided that the  Corporation  agrees at all times to maintain  ownership of at
least 65% of the issued and outstanding voting shares in the capital of PMC from
time to time and a failure to maintain such level of ownership  will be an Event
of Default (as such term is defined in the Credit Agreement).

12.  Payment. Upon payment and performance of the Obligations,  the Lender shall
release the Shares and the Certificates to the Corporation.

13.  No Merger,  etc.  This Pledge  shall not operate by way of merger of any of
the Obligations and no judgment  recovered by the Lender shall operate by way of
merger of or in any way affect the security of the Shares and Certificates.

14.  Supplemental  Security.  This Pledge and the Shares and Certificates are in
addition, without prejudice, and supplemental to and not in substitution for any
other security held or which may hereafter be held by the Lender.

15.  Further Assurances. The Corporation shall from time to time, whether before
or after the Lender makes a demand for payment of the  Obligations,  do all such
acts and things and execute and deliver all such deeds,  transfers,  assignments
and   instruments  as  the  Lender  may  require  for  perfecting  the  security
constituted hereby or by the Shares, for facilitating the sale of or exercise by
the Lender of rights under the Shares in connection with any realization thereof
and for exercising all powers, authorities and discretions hereby conferred upon
the Lender.

16.  Headings,  etc. The division of this Pledge into sections and the insertion
of  headings  are for  convenience  of  reference  only and shall not affect the
interpretation hereof.

17.  Governing Law. This Pledge shall be governed by and construed in accordance
with  the laws of the  Province  of  British  Columbia  and the  laws of  Canada
applicable  therein and shall be treated in all  respects as a British  Columbia
contract  (without  reference  to the  choice  of law  rules).  The  Corporation
irrevocably  submits  to  the  courts  of  British  Columbia  in any  action  or
proceeding  arising out of or relating to this Pledge,  and  irrevocably  agrees
that all such  actions  and  proceedings  may be heard  and  determined  in such
courts, and irrevocably  waives, to the fullest extent possible,  the defense of
an inconvenient forum.

18.  Successors,  etc.  This Pledge shall enure to the benefit of the Lender and
its  successors  and assigns and shall be binding upon the  Corporation  and its
successors and permitted  assigns.  All rights of the Lender  hereunder shall be
assignable in accordance with the terms of the Credit Agreement.

19.  Severability.  The invalidity or  unenforceability of any provision of this
Pledge shall not affect the validity or  enforceability  of any other  provision
hereof and any such  invalid or  unenforceable  provision  shall be deemed to be
severable from the other provisions hereof.
<PAGE>

20.  Notices.  All notices,  requests,  demands,  directions and  communications
("notices")  hereunder  shall be sent by telex,  telecopy  or  similar  means of
recorded  communication  or hand  delivery,  and  shall be  effective  when hand
delivered  or, in the case of  telex,  telecopy  or  similar  means of  recorded
communication,  when received.  All notices shall be given to the parties hereto
at the  addresses  set out in the Credit  Agreement,  or otherwise in accordance
with any unrevoked written direction of a party as to a change of address.

21.  Incorporation  of  Schedules.  Schedule A hereto  shall,  for all  purposes
hereof, form an integral part of this Pledge.

22.  Conflict.  In  the  event  of  a  conflict  or  inconsistency  between  the
provisions  of this  Pledge  and the  provisions  of the Credit  Agreement,  the
provisions of the Credit Agreement shall prevail.

23.  Acknowledgement of Receipt/Waiver.  The Corporation acknowledges receipt of
an executed copy of this Pledge. The Corporation waives, to the extent permitted
by law, the right to receive a copy of any financing statement, financing change
statement or  verification  statement  registered with or issued by any personal
property  registry or other  governmental  body or agency  thereof in connection
with this Pledge.

     IN WITNESS  WHEREOF the Corporation has duly executed this Share Pledge and
affixed  its  corporate  seal  under  the  hands  of its  proper  officers  duly
authorized for the purpose thereof as of the date first above written.

                                       PMC-SIERRA, INC.

                                       Per: /s/ John W. Sullivan, VP Finance
                                            --------------------------------
                                            Authorized Signatory
                                            
                                       Signed and authorized on: April 27/98



<PAGE>


                                   SCHEDULE A

                 CERTAIN VOTING SHARES OWNED BY THE CORPORATION
                        IN THE CAPITAL OF PMC-SIERRA LTD.


    Description               Certificate No.               Number of Shares
    -----------               ---------------               ----------------
  Ordinary Shares                  0-2                          2,579,797



This  Agreement  is dated  the 27 day of April , 1998 made  BETWEEN  PMC-Sierra,
Inc.,  a  corporation  incorporated  and  registered  under the Laws of Delaware
(hereinafter  referred to as the " Corporation")  and CIBC Inc , a U.S.  company
incorporated and registered under the laws of New York, United States of America
( hereinafter referred to as the "Lender").

WHEREAS:

A.   The Corporation  has entered into a credit  agreement with the Lender dated
March 11, 1998 (as such agreement may from time to time be amended, supplemented
or  otherwise  modified  or  restated  (hereinafter  referred  to as the "Credit
Agreement")

B.   The  Corporation  is at the date  hereof  the  holder of all the issued and
outstanding  shares  in the  capital  of  PMC-Sierra  International,  Inc.(  the
"Shares"), a company incorporated and registered in Barbados with its registered
office situate at c/o The Corporate  Secretary  Limited,  Whitepark House, White
Park Road, St. Michael, Barbados (hereinafter referred to as the " Company");

C.   It is a  condition  of the  advance of the said  credit  facilities  by the
Lender to the Corporation that the Corporation pledge to the Lender those Common
Shares in the  capital  of the  Company  described  in  Schedule  A hereto ( the
"Pledged Shares") and execute and deliver this Agreement together with the share
certificates  representing the Pledged Shares (the  "Certificates")  and a share
transfer form (the "Share Transfer  Form"),  duly executed by the Corporation in
blank,  for  transfer  of the  Pledged  Shares to and in favour of the Lender as
security for the payment and  performance of all  indebtedness,  liabilities and
obligations  of the  Corporation  to the Lender  hereunder  and under the Credit
Agreement as well as other dealings by which the Corporation may become indebted
or  liable  to the  Lender  in any  manner  whatsoever  pursuant  to the  Credit
Agreement (the "Obligations").

     NOW THEREFORE  WITNESSETH  that in  consideration  of these premises and of
other good and valuable  consideration,  the receipt and sufficiency of which is
hereby  acknowledged  by the  Corporation,  the  Corporation  hereby  covenants,
declares and agrees with the lender as follows:

1.   All terms defined in the Credit Agreement and not otherwise  defined herein
or in the recitals hereto shall have the respective  meanings attributed to them
in the Credit Agreement.

2.   The Corporation hereby pledges, assigns, mortgages, charges,  hypothecates,
sets over unto and deposits with the Lender, and grants to the Lender a security
interest in, all of the  Corporation's  right,  title and interest in and to the
Pledged Shares and the Certificates  together with all replacements  thereof and
substitutions  therefor  to be held by the  Lender as a general  and  continuing
security for the payment and performance of the Obligations.
<PAGE>

3.   The Corporation  shall forthwith deliver to the Lender the Certificates and
the Share Transfer Form in blank, signed by the Corporation,  as transferor, and
the same shall be  retained  by and  remain in the  custody of the Lender or its
nominee.

4.   The Corporation shall also forthwith deliver to the Lender a certified copy
of a resolution  of the directors of the Company  consenting to the  transfer(s)
contemplated by this Agreement.

5.   Upon  the  failure  of  the  Corporation  to  pay  or  perform  any  of the
Obligations on demand or otherwise  when due and payable or to be performed,  as
the case may be, or upon the  occurrence of an Event of Default or any other act
which would permit the Lender to demand payment of the  Obligations,  the Lender
or its agent may realise upon or  otherwise  deal with or dispose of the Pledged
Shares by sale,  transfer or  delivery  or  exercise  and enforce all rights and
remedies of the holder of the Pledged  Shares as if the Lender were the absolute
owner thereof for such price in money or other consideration and upon such terms
and conditions as it deems best. Any such remedy may be exercised  separately or
in combination and shall be in addition to and not in substitution for any other
rights the Lender may have, however created,  provided that the Lender shall not
be bound to  exercise  any such right or remedy.  The Lender  shall not be bound
under any  circumstances  to realise  upon the  Pledged  Shares and  neither the
Lender nor its agents shall be responsible  for any loss  occasioned by any sale
or other  dealing with the Pledged  Shares  permitted by and made in  accordance
with  applicable  law or by the  retention  of or  delay or  failure  to sell or
otherwise  deal with or dispose of the  Pledged  Shares and the Lender is hereby
released from all  responsibility for any depreciation in or loss in value which
may be occasioned in respect of the Pledged Shares.

6.   Unless  and until  (i) an Event of  Default  or any  other act which  would
permit the Lender to demand payment of the  Obligations  shall have occurred and
(ii)  written  notice  thereof  shall  have  been  given  by the  Lender  to the
Corporation, the Corporation shall be entitled to execute any and all voting and
other  consensual  rights  pertaining  to the  Pledge  Shares  and to  give  all
consents,  waivers or  ratifications in respect thereof and to receive notice of
and to attend all meetings of the  shareholders of the Company to which, but for
the  execution of this  Agreement,  the  Corporation  would have been  entitled;
provided that no vote shall be cast or any consent waiver or ratification  given
or any action taken which would violate or be inconsistent with any of the terms
of this  Agreement or any document  which the parties may execute in  connection
with the  Obligations or which would have the effect of impairing or prejudicing
the position or interest of the Lender.  All such rights of the  Corporation  to
vote and to give  consents,  waivers  and  ratifications  shall cease in case an
Event of  Default  or any other  act which  would  permit  the  Lender to demand
payment of the  Obligations  shall  occur and Section 9 hereof  shall  thereupon
become applicable.

7.   Unless an Event of Default or any other act which  would  permit the Lender
to demand  payment of the  Obligations  shall have  occurred  and subject to the
terms of the Credit Agreement:

     (i)   all cash  dividends  payable in respect of the Pledge Shares shall be
           paid to the Corporation  Provided that all cash dividends  payable in
           respect of the Pledged  Shares which are  determined by the Lender to
           represent in whole or in part an extraordinary,  liquidating or other
           distribution  in return of  capital  shall be paid (to the  extent so
           determined by the Lender to represent an  extraordinary,  liquidating
           or other  distribution  in  return  of  capital)  to the  Lender  and
           retained by the Lender as part of the Pledged Shares.
<PAGE>

     (ii)  The Corporation  shall be entitled to receive all other or additional
           stock or other  securities or property paid or  distributed by way of
           dividend or otherwise in respect of the Pledged Shares.

     (iii) Subject to Section 10, the  Corporation  shall be entitled to receive
           directly:

           (a)  all other or  additional  stock or other  securities or property
                (including  cash) paid or  distributed by the Company in respect
                of the Pledged Shares by way of stock-split,  re-classification,
                combination of shares or similar re- arrangement and

           (b)  all other or  additional  stock or other  securities or property
                (including  cash)  which may be paid in respect  of the  Pledged
                Shares  by reason of any  consolidation,  merger,  amalgamation,
                exchange of stock, conveyance of assets,  liquidation or similar
                corporate re-organisation.

8.    All dividends, distributions or other payments received by the Corporation
or the Lender  contrary to the  provisions of Section 7 hereof shall be received
and held in trust by the  Corporation or the Lender (as the case may be) for and
on behalf and for the benefit of each for the other and shall be segregated from
other  property  or fund and shall  forthwith  be paid over to the Lender or the
Corporation  respectively  (as the case may be) in the same form as so  received
(with any endorsement).

9.    In case an Event of Default or any other act which would permit the Lender
to demand payment of the  Obligations  shall have occurred,  the Lender shall be
entitled to exercise all of the rights,  powers and remedies  (whether vested in
it by this Agreement or by law) for the protection and enforcement of its rights
in  respect of the  Pledged  Shares and the  Lender  shall be  entitled  without
limitation, to exercise the following rights:

      (i)  to receive all amounts payable in respect of the Pledged Shares under
           Section 7 hereof;

      (ii) to transfer  all or any part of the Pledge  Shares into the  Lender's
           name or into the name of its nominee or nominees  (the Lender  hereby
           agrees to promptly  notify the Corporation and the Company after such
           transfer;  provided  that the failure to give such  notice  shall not
           affect the validity of such transfer);

      (iii)subject  to the  giving  of  written  notice  to the  Corporation  in
           accordance  with  Section  6  hereof,  to vote all or any part of the
           Pledged  Shares  (whether  or not  transferred  into  the name of the
           Lender) and give all consents, waivers or ratifications in respect of
           the Pledged  Shares and otherwise act with respect  thereto as though
           it  were  the  absolute   owner  thereof  (the   Corporation   hereby
           irrevocably  constituting  and  appointing  the  Lender the proxy and
           attorney-in-fact of the Corporation); and
<PAGE>

      (iv) at any time  and from  time to sell,  assign  and  deliver,  or grant
           options  to  purchase  (subject  to the  Articles  and bylaws and any
           Unanimous  Shareholders  Agreement of the Company) all or any part of
           the Pledged Shares.

10.   In the event of any  subdivision,  consolidation,  share  exchange,  stock
dividend,  redivision,  share  issue or change in the  capital of the Company or
other  similar  action during the period that this  Agreement  remains in effect
resulting in an increase in the number of issued and outstanding  shares held by
any person in the capital of the  Company,  the number of shares to be delivered
by the  Corporation to the Lender  pursuant to this Agreement shall be increased
(the  "Additional  Shares") so that the Lender  will at all times have  pledged,
assigned,  mortgaged,  charged,  hypothecated  and deposited  with and possess a
security interest in the lesser of (i) 65% of the issued and outstanding  shares
in the capital of the Company and (ii) 100% of the issued and outstanding shares
in the capital of the Company held by the Corporation from time to time, and the
Corporation  hereby agrees to deliver to the Lender the share  certificates  and
share  transfer  forms,  duly  signed by the  Corporation,  in  respect  of such
Additional  Shares and the  Additional  Shares  shall  form part of the  Pledged
Shares  hereunder and shall be subject to the charges,  terms and  conditions of
this Agreement;  and the Corporation  hereby agrees at all times to maintain its
ownership of at least 65% of the issued and outstanding shares in the capital of
the Company and a failure to maintain  such level of ownership  will be an Event
of Default.

11.   From and  after  the date of an Event of  Default  or any  other act which
would permit the Lender to demand payment of the  Obligations,  the  Corporation
hereby  appoints,  authorises  and  empowers  the  Lender  as  attorney  for the
Corporation  to sign any  transfer or other  document  necessary to complete the
transfer of any of the Pledged  Shares in accordance  with the terms hereof.  If
any amount should remain unpaid and  outstanding  in respect of the  Obligations
after an Event of  Default  or any other act which  would  permit  the Lender to
demand payment of the Obligations,  the Corporation hereby irrevocably  appoints
the Lender  thereof as its  attorney  in the name of the  Corporation  with full
powers of substitution but for the use and benefit of the Lender, to do all such
acts and  take  all  such  proceedings  as the  Lender  may  from  time to think
advisable to realise upon the Pledged Shares in accordance with the terms hereof
and to enforce the rights hereby  assigned and obtain  possession of and realise
upon the property hereby charged.

12.   The  Lender  shall not be obliged to exhaust  its  resources  against  the
Corporation  or any other person or persons or against any other security it may
hold in  respect of the  Obligations  before  the  Lender  may  realise  upon or
otherwise  deal with the Pledged  Shares or  Certificates  in such manner as the
Lender may  consider  desirable.  The  Lender may grant time for  payment or any
other  indulgence,  take and give up securities,  and may compound  with,  grant
releases and  discharges and otherwise  deal with the  Corporation  and with any
other person and the Pledged Shares and  Certificates and Share Transfer Form as
the Lender may see fit without liability to the Corporation for any loss thereby
occasioned to the  Corporation and prejudice to the Obligations or the rights of
the Lender in respect of this Agreement.
<PAGE>

13.   All  costs  and  charges  incurred  by or on  behalf  of the  Lender  with
reference  to the  Pledged  Shares or the  realisation  thereof  (including  all
reasonable  legal fees and  disbursements,  on a solicitor and own client basis,
all court costs and expenses of taking  possession of,  protecting and releasing
upon the security constituted by the Pledged Shares and the costs and charges in
connection  with releasing,  collecting,  selling,  transferring,  delivering or
obtaining  payment of the Pledged  Shares)  shall be added to and form a part of
the  Obligations  and  shall  be first  charge  upon  the  proceeds  of any such
realisation, collection, sale, transfer, delivery or obtaining of payment.

14.   Any proceeds of the Pledged  Shares may be held in lieu of Pledged  Shares
realised  upon and  may,  as and  when  the  Lender  sees  fit,  be  applied  or
appropriated  as the  Lender may elect on  account  of the  Obligations  and the
balance,  if any,  shall be paid to the  Corporation  or as a court of competent
jurisdiction may direct.  If there shall be a deficiency,  the Corporation shall
remain liable for such deficiency and shall pay the amount of such deficiency to
the Lender forthwith.

15.   Upon payment and performance of the Obligations,  the Lender shall release
the Pledged  Shares and the  Certificates  and the Share  Transfer  Forms to the
Corporation.

16.   This  Agreement  shall  not  operate  by  way  of  merger  of  any  of the
Obligations  and no judgment  recovered  by the Lender  shall  operate by way of
merger  of or in  any  way  effect  the  security  of  the  Pledged  Shares  and
Certificates.

17.   This  Agreement  and the  Pledged  Shares and  Certificates  are,  without
prejudice, in addition and supplemental to and not in substitution for any other
security held or which may hereafter be held by the Lender.

18.   The Corporation hereby agrees that it will do such further acts and things
and execute and deliver to the Lender such  additional  assignments,  agreements
and instruments as the Lender may reasonably  require or deem advisable to carry
into effect the purposes of this Agreement or to further assure and confirm unto
the Lender its rights, powers and remedies hereunder.

19.   The Corporation hereby covenants with the Lender as follows:

      (i)  on the date hereof the Corporation is the legal and beneficial  owner
           of record of 1,000 Common Shares in the capital of the Company, which
           are all of the issued and  outstanding  shares in the  capital of the
           Company;

      (ii) the   Pledged   Shares   are  under  no   pledge,   lien,   mortgage,
           hypothecation,  security interest, charge option or other encumbrance
           whatsoever,  except the lien, charge and security interest created by
           this Agreement;

      (iii)it has full  power,  authority  and legal  right to pledge all of the
           Pledged Shares pursuant to this Agreement;

      (iv) this  Agreement has been duly  authorised,  executed and delivered by
           the  Corporation  and  constitutes  the  legal,   valid  and  binding
           obligation of the  Corporation  enforceable  in  accordance  with its
           terms; and
<PAGE>

      (v)  no consent of any other  party  (including  without  limitation,  any
           stockholder or creditor of the Corporation or any of its subsidiaries
           or  affiliates)  is required to be  obtained  by the  Corporation  in
           connection  with  the  execution,  delivery  or  performance  of this
           Agreement  or in  connection  with the  exercise  of the  rights  and
           remedies pursuant to this Agreement. Except that the Articles and By-
           laws of the  Company  state  that no  shares  in the  capital  of the
           Company shall be transferred without the approval of the directors or
           a  committee  of  directors  of  the  Company  evidenced  by  written
           resolution.

20.   Immediately  after the Obligations  have been repaid to the Lender and all
other  conditions  in  connection  therewith  satisfied  and  fulfilled  by  the
Corporation,  this  Agreement  shall  terminate  and the Lender shall  forthwith
execute  and  deliver to the  Corporation  a proper  instrument  or  instruments
acknowledging  the  satisfaction of the  Obligations  owing to the Lender by the
Corporation  and the  termination  of this  Agreement  and will duly release the
Corporation and the Pledged Shares from the security  interest and charge hereby
created  and  re-assign  transfer  and  deliver to the  Corporation  the Pledged
Shares.

21.   The  division of this  Agreement  into  sections  are for  convenience  of
reference only and shall not affect the interpretation hereof.

22.   This Agreement  shall be governed by and construed in accordance  with the
laws of  Barbados  and the  parties  hereto  hereby  irrevocably  submit  to the
jurisdiction  of the courts of Barbados in any action or proceeding  arising out
of or relating to the Agreement and irrevocably  agree that all such actions and
proceedings shall be heard and determined in such courts and irrevocably  waive,
to the fullest extent possible, the defence of forum non conveniens.

23.   This Agreement shall inure to the benefit of the Lender and its successors
and assigns and shall be binding upon the  Corporation  and its  successors  and
permitted  assigns.  All rights of the Lender  hereunder  shall be assignable in
accordance with the terms of the Credit Agreement.

24.   The invalidity or  enforceability of any provision of this Agreement shall
not affect the validity or  enforceability of any other provision hereof and any
such invalid or  unenforceable  provision shall be deemed to be several from the
other provisions hereof.

25.   All notices hereunder shall be sent by telex, telecopy or similar means of
recorded  communication  or hand  delivery,  and  shall be  effective  when hand
delivered  or in the case of  telex,  telecopy  or  similar  means  of  recorded
communication when received. All notices shall be given to the parties hereto at
the addresses set out in the Credit  Agreement,  or otherwise in accordance with
any unrevoked written  direction of a party as to a change of address,  given in
accordance with this section.

26.   In the event of a conflict or inconsistency between the provisions of this
Agreement and the  provisions  of the Credit  Agreement,  the  provisions of the
Credit Agreement shall prevail.

27.   This  Agreement  shall be a continuing  and running  security to cover the
maximum sum of 16,000,000.00 dollars currency of the United States of America.

      IN WITNESS  WHEREOF the parties  hereto have duly executed this  Agreement
April 27, 1998 the date first above written.

SIGNED on behalf of     )              /S/ John W. Sullivan
PMC-SIERRA INC. by      )              --------------------------------------
                                       John Sullivan, Chief Financial Officer
                         





<PAGE>



         I, Daniel J McLeod of Vancouver,  British Columbia Notary Public in and
for  British  Columbia  do  hereby  CERIFY  that on the day of the  date  hereof
personally appeared before me a male/female who identified himself/herself to be
the within-named the executing party to the within written  Affidavit and did in
my presence  sign and deliver the same as for his/her free and voluntary act and
deed.

IN TESTIMONY  whereof I have unto set and  subscribed my name and Seal of Office
this

day of  July 10, 1998.


                                                        /S/ Daniel J. McLeod
                                                        --------------------
                                                            Notary Public

THE CORPORATE SEAL of                 )
CIBC INC  was hereto set and affixed  )
by the
Secretary thereof in the presence of: )                 --------------------
                                                              Secretary



- -----------------------------
         Director


- ------------------------------
       Notary Public


I,
       of
Notary  Public in and for              do hereby  CERIFY  that on the day of the
date  hereof  personally   appeared  before  me  a  male/female  who  identified
himself/herself to be the within-named the executing party to the within written
Affidavit  and did in my presence  sign and deliver the same as for his/her free
and voluntary act and deed.

IN TESTIMONY  whereof I have unto set and  subscribed my name and Seal of Office
this

          day of                    1998.


                                          ----------------------------
                                                 Notary Public




                                            400 Burrard Street
                                            Vancouver, British Columbia, V6C 3A6
                                            ------------------------------------


CIBC                                 GUARANTEE

For valuable  consideration,  I, the undersigned guarantor,  agree with Canadian
Imperial Bank of Commerce ("CIBC") as follows:

1.  Customer's Name.  The name of the customer whose debts I am guaranteeing is:

    PMC - SIERRA LTD.,  a company  incorporated  under the laws of Canada,  (the
    "Customer").

2.  Guarantee.  I  guarantee  payment to CIBC of all the  Customer's  Debts.  My
    liability under this Guarantee is:

          (a) | |  unlimited.

          (b) |X| limited to the principal sum of Twenty Five Million Dollars in
          U.S.  Funds  or  the  Equivalent  Amount  in  Canadian  Funds  or  any
          combination  of  the  two  together  plus  interest  and  expenses  in
          accordance with Section 5.

NOTE:     IF NEITHER BOX (a) NOR BOX (b) IS CHECKED  OFF, OR IF BOTH ARE CHECKED
          OFF,  OR IF BOX (b) IS CHECKED  OFF BUT NO FIGURE IS  INSERTED  IN THE
          BLANK, THEN BOX (a) ALONE WILL BE CONSIDERED TO HAVE BEEN CHECKED OFF.

1.  Governing  Law. This  Guarantee is governed by the laws of British  Columbia
    (the  "Jurisdiction")  (without  reference  to the  choice of law  rules.) I
    irrevocably  submit  to the  courts  of the  Jurisdiction  in any  action or
    proceeding  arising out of or relating to this  Guarantee,  and  irrevocably
    agree that all such actions and  proceedings  may be heard and determined in
    such courts,  and  irrevocably  waive, to the fullest extent  possible,  the
    defense of an  inconvenient  forum.  I agree that a judgment or order in any
    such action or  proceeding  may be enforced  in other  jurisdictions  in any
    manner provided by law. Provided, however, that CIBC may serve legal process
    in any manner permitted by law or may bring an action or proceeding  against
    me or my property or assets in the courts of any other jurisdiction. Without
    limiting the generality of the foregoing, I hereby agree that service of all
    writs,  process and  summonses  in any suit,  action or  proceeding  brought
    against me under or in respect of this Guarantee in the  Jurisdiction may be
    made upon Blake,  Cassels & Graydon,  Barristers and Solicitors,  Suite 2600
    Three  Bentall  Centre,  595 Burrard  Street,  Vancouver,  British  Columbia
    (Attention:  Joanne  Payne) and hereby  irrevocably  appoint Blake Cassels &
    Graydon as my true and lawful  attorney-in-fact  in my name, place and stead
    to accept  such  service of any and all writs,  process and  summonses,  and
    agree that the  failure of Blake,  Cassels and Graydon to give any notice of
    any such service of process to me shall not impair or affect the validity of
    such service or of any judgment based thereon.

4.  Copy Received.  I acknowledge having received a copy of this Guarantee.

NOTE:     THE  "ADDITIONAL  TERMS  AND  CONDITIONS  OF  THIS  GUARANTEE"  ON THE
          FOLLOWING PAGES FORM PART OF THIS GUARANTEE.

                                 Dated April 27, 1998.
                                       --------------

                                 PMC - SIERRA, INC.
                                 (a Delaware corporation)
                                 ---------------------------------
                                 GUARANTOR'S NAME (RECORD IN FULL)

                                 /S/ John W. Sullivan
                                 -------------------------------------
                                 AUTHORIZED SIGNATURE          OFFICE:

                                 105 - 8555 Baxter Place
                                 -----------------------
                                 GUARANTOR'S ADDRESS

                                 Burnaby, B.C. V5A-4V7
                                 -----------------------------------------------
                                 (CITY/TOWN, PROVINCE/STATE AND POSTAL/ZIP CODE)


<PAGE>



                ADDITIONAL TERMS AND CONDITIONS OF THIS GUARANTEE

5.  Payment On Demand.  I will immediately pay CIBC on demand:

    (a)   the  amount  (and in the  currency)  of the  Customer's  Debts (but if
          Section 2(b) applies,  subject to that limitation),  plus any expenses
          (including  all  legal  fees and  disbursements)  incurred  by CIBC in
          enforcing any of CIBC's rights under this Guarantee; and

    (b)   interest (including interest on overdue interest,  compounded monthly)
          on unpaid amounts due under this Guarantee calculated from the date on
          which those amounts were  originally  demanded  until payment in full,
          both  before and after  judgment,  at the rates (and in the  currency)
          applicable to the corresponding Customer's Debts.

6.  Making Demand.  Demand and any other notices given under this Guarantee will
    be  conclusively  considered  to have been  made  upon me when the  envelope
    containing it, addressed to me (or, if there is more than one Person signing
    this  Guarantee,  to any one of us) at the last  address  known to CIBC,  is
    deposited,  postage  prepaid,  first class  mail,  in a post  office,  or is
    personally  delivered to that address.  I will give CIBC  immediate  written
    notice,  addressed  to the  Manager  of the Bank  Office,  of each and every
    change of my address.

7.  No Setoff or  Counterclaim.  I will make all  payments  required  to be made
    under this Guarantee  without regard to any right of setoff or  counterclaim
    that I have or may have against the Customer or CIBC.

8.  Application of Moneys Received.  CIBC may apply all moneys received from me,
    the Customer or any other Person (including under any Security that CIBC may
    from  time to time  hold)  upon such  part of the  Customer's  Debts as CIBC
    considers appropriate.

9.  Exhausting Recourse.  CIBC does not need to exhaust its recourse against the
    Customer  or any other  Person or under any  Security  CIBC may from time to
    time  hold  before  being  entitled  to  full  payment  from me  under  this
    Guarantee.

10. Absolute  Liability.  My  liability  under this  Guarantee  is absolute  and
    unconditional.  It  will  not be  limited  or  reduced,  nor  will  CIBC  be
    responsible  or owe any duty (as a fiduciary or  otherwise)  to me, nor will
    CIBC's  rights  under this  Guarantee  be  prejudiced,  by the  existence or
    occurrence  (with or without my  knowledge or consent) of any one or more of
    the following events:

          (a)      any termination,  invalidity,  unenforceability or release by
                   CIBC of any of its rights against the Customer or against any
                   other Person or of any Security;

          (b)      any  increase,  reduction,  renewal,  substitution  or  other
                   change in, or  discontinuance  of, the terms  relating to the
                   Customer's  Debts or to any  credit  extended  by CIBC to the
                   Customer;   any  agreement  to  any  proposal  or  scheme  of
                   arrangement concerning, or granting any extensions of time or
                   any other  indulgences or concessions to, the Customer or any
                   other  Person;  any  taking  or  giving  up of any  Security;
                   abstaining   from  taking,   perfecting  or  registering  any
                   Security;  allowing any Security to lapse (whether by failing
                   to make or maintain any  registration  or otherwise);  or any
                   neglect or  omission  by CIBC in respect of, or in the course
                   of, doing any of these things;

          (c)      accepting   compositions   from  or   granting   releases  or
                   discharges to the Customer or any other Person,  or any other
                   dealing  with the  Customer  or any other  Person or with any
                   Security that CIBC considers appropriate;

          (d)      any unenforceability or loss of or in respect of any Security
                   held from time to time by CIBC from me, the  Customer  or any
                   other Person,  whether the loss is due to the means or timing
                   of  any  registration,  disposition  or  realization  of  any
                   collateral  that is the subject of that Security or otherwise
                   due to CIBC's fault or any other reason;

          (e)      the death of the Customer; any change in the Customer's name;
                   or  any  reorganization  (whether  by  way  of  amalgamation,
                   merger,  transfer,  sale, lease or otherwise) of the Customer
                   or the Customer's business;

          (f)      any change in my financial  condition or that of the Customer
                   or any other Guarantor (including insolvency and bankruptcy);

          (g)      if I am or the  Customer  is a  corporation,  any  change  of
                   effective  control,   or  if  I  am  or  the  Customer  is  a
                   partnership, a dissolution or any change in the membership;

          (h)      any event,  whether or not  attributable to CIBC, that may be
                   considered to have caused or  accelerated  the  bankruptcy or
                   insolvency  of the  Customer  or any  Guarantor,  or to  have
                   resulted in the initiation of any such proceedings;
<PAGE>

          (i)      CIBC's   filing   of  any   claim   for   payment   with  any
                   administrator,  provisional liquidator, conservator, trustee,
                   receiver,  custodian or other similar  officer  appointed for
                   the  Customer  or  for  all  or  substantially   all  of  the
                   Customer's assets;

          (j)      any  failure  by  CIBC  to  abide  by any of  the  terms  and
                   conditions of CIBC's  agreements  with, or to meet any of its
                   obligations  or  duties  owed to,  me,  the  Customer  or any
                   Person,  or any breach of any duty (whether as a fiduciary or
                   otherwise)  that exists or is alleged to exist  between  CIBC
                   and me, the Customer or any Person;

          (k)      any incapacity,  disability,  or lack or limitation of status
                   or  of  the  power  of  the  Customer  or of  the  Customer's
                   directors,   managers,  officers,  partners  or  agents;  the
                   discovery  that  the  Customer  is not or may  not be a legal
                   entity;  or any  irregularity,  defect or  informality in the
                   incurring of any of the Customer's Debts; or

          (l)      any event whatsoever that might be a defence available to, or
                   result in a reduction  or  discharge  of, me, the Customer or
                   any other Person in respect of either the Customer's Debts or
                   my liability under this Guarantee.

          For  greater  certainty,  I agree  that CIBC may deal with me,  the
          Customer  and any other Person in any manner  without  affecting my
          liability under this Guarantee.

11. Principal Debtor. All moneys and liabilities  (whether matured or unmatured,
    present or future, direct or indirect, absolute or contingent) obtained from
    CIBC will be deemed to form part of the  Customer's  Debts,  notwithstanding
    the occurrence of any one or more of the events  described in Section 10(k).
    I will pay CIBC as principal debtor any amount that CIBC cannot recover from
    me as Guarantor immediately following demand as provided in this Guarantee.

12. No  Liability  for  Negligence,  etc.  CIBC will not be liable to me for any
    negligence  or any breaches or omissions on the part of CIBC,  or any of its
    employees,  officers,  directors or agents,  or any  receivers  appointed by
    CIBC, in the course of any of its or their actions.

13. Continuing  Guarantee.  This is a  continuing  guarantee  of the  Customer's
    Debts.

14. Terminating  Further  Liability.  I may discontinue any further liability to
    pay the  Customer's  Debts by  written  notice to the Bank  Office.  I will,
    however,  continue  to be  liable  under  this  Guarantee  for  any  of  the
    Customer's  Debts that the Customer  incurs up to and including the 30th day
    after CIBC receives my notice.

15. Statement  Conclusive.  Except for  demonstrable  errors or  omissions,  the
    amount  appearing due in any account stated by CIBC or settled  between CIBC
    and the Customer will be conclusive as to that amount being due.

16. CIBC's Priority.

    (a)   If any payment  made to CIBC by the  Customer  or any other  Person is
          subsequently  rendered  void or must  otherwise  be  returned  for any
          reason,  I will be  liable  for  that  payment  (but if  Section  2(b)
          applies,  subject  to that  limitation).  Until all of  CIBC's  claims
          against the Customer in respect of the Customer's Debts have been paid
          in full, I will not require that CIBC assign to me any Security  held,
          or any  other  rights  that  CIBC may  have,  in  connection  with the
          Customer's  Debts,  and I will not  assert  any right of  contribution
          against any Guarantor,  or claim repayment from the Customer,  for any
          payment that I make under this Guarantee.

    (b)   If the  Customer is bankrupt,  or (if the  Customer is a  corporation)
          liquidated  or wound up, or if the  Customer  makes a bulk sale of any
          assets  under  applicable  law,  or  if  the  Customer   proposes  any
          composition with creditors or any scheme of arrangement,  CIBC will be
          entitled to all  dividends  and other  payments  until CIBC is paid in
          full,  and I will remain liable under this  Guarantee  (but if Section
          2(b) applies, subject to that limitation).

    (c)   If CIBC gives to any trustee in bankruptcy or receives a valuation of,
          or retains, any Security that CIBC holds for payment of the Customer's
          Debts,  that will not be  considered,  as between CIBC and me, to be a
          purchase of such Security or payment, satisfaction or reduction of the
          Customer's Debts.

17. Assignment and Postponement of Claim.  After an Event of Default (as defined
    in the Credit  Agreement)  or any other act or event which would permit CIBC
    to demand payment of the credit facilities  established by CIBC in favour of
    the Customer  under the Credit  Agreement,  I postpone in favour of CIBC all
    debts and  liabilities  that the Customer now owes or later may from time to
    time owe to me in any manner until CIBC is paid in full. I further assign to
    CIBC all such debts and liabilities,  to the extent of the Customer's Debts,
    until  CIBC is paid in full.  If I receive  any  moneys in payment of any of
    such  debts  and  liabilities,  I will  hold  them in  trust  for,  and will
    immediately  pay them to,  CIBC  without  reducing my  liability  under this
    Guarantee.
<PAGE>

18. Withholding Taxes. Unless a law requires otherwise, I will make all payments
    under this Guarantee  without  deduction or  withholding  for any present or
    future  taxes of any kind.  If a law does so require,  I will pay to CIBC an
    additional  amount as is necessary  to ensure CIBC  receives the full amount
    CIBC would have  received  if no  deduction  or  withholding  had been made.
    Without  limiting the  generality of the foregoing I hereby  understand  and
    agree that (i) the  Customer's  liability  will be paid to CIBC  strictly in
    accordance  with the terms  and  provisions  of any  agreement,  express  or
    implied, which has been made or may hereafter be made or entered into by the
    Customer,  regardless of any law,  regulation or decree, now or hereafter in
    effect,  which might in any manner  affect any of the terms or provisions of
    any such agreement or rights of CIBC as against the Customer with respect to
    any of the Customer's Debts, or cause or permit to be invoked any alteration
    in the time, amount or manner of payment of any of the Customer's Debts, and
    (ii) in each instance when the Customer  shall have agreed,  relative to any
    of the Customer's Debts, to pay or provide CIBC with any amount of money, if
    such amount is not  actually  paid or provided as and when  agreed,  I will,
    upon request,  and as CIBC may elect, pay or provide the amount in the exact
    currency and place as agreed by the  Customer.  All such  payments  shall be
    made  without  set-off or  counterclaim  and free and clear of, and  without
    deduction for or on account of, any present or future income, stamp or other
    taxes, levies, imposts, duties, charges, fees , deductions,  withholdings or
    restrictions  or  conditions  of any  nature  whatsoever  now  or  hereafter
    imposed,  levied,  calculated,  withheld  or  assessed by any country or any
    political subdivision or taxing authority thereof or therein including,  but
    not limited to, the United States of America or any political subdivision or
    taxing authority  thereof or therein (all of the foregoing being referred to
    herein as  "Taxes").  If any  Taxes are  required  to be  withheld  from any
    amounts  payable to CIBC,  the amounts so payable to CIBC shall be increased
    to the  extent  necessary  to yield to CIBC  (after  payment  of all  Taxes)
    interest  and such other  amounts  payable  hereunder  at the rate or in the
    amounts herein specified.

19. Judgment Currency. If for the purpose of obtaining or enforcing any judgment
    on any matter  under this  Guarantee  in any court in any  jurisdiction,  it
    becomes  necessary to convert into any other  currency  (such other currency
    being hereinafter  called the "Judgment  Currency") an amount due in respect
    of the Customer's  Debts, then the conversion shall be made at the option of
    CIBC at the Rate of Exchange prevailing either on the Banking Day before the
    date of default or on the Banking  Day before the day on which the  judgment
    is given (the date as of which  such  conversion  is made being  hereinafter
    called the  "Conversion  Date").  If there is a change  between  the Rate of
    Exchange in effect on the Conversion  Date (or any other date which shall be
    specified  in any  judgment or  judicial  award) and the Rate of Exchange in
    effect  on the date of  payment,  then I  covenants  and  agrees to pay such
    additional  amounts, if any, but in any event not a lesser amount, as may be
    necessary,  together with the amount paid in the Judgment Currency converted
    at the Rate of  Exchange  in effect on the date of  payment,  to produce the
    amount in the  currency of the said amount due in respect of the  Customer's
    Debts which could have been purchased  with the amount of Judgment  Currency
    stipulated  in the  judgment  or  judicial  award at the Rate of Exchange in
    effect  on the  Conversion  Date or such  other  date as  specified  in such
    judgment or judicial award. Any amount due under this clause shall be due as
    a separate and independent  debt and shall not be affected by judgment being
    obtained  for amounts  otherwise  due under or in respect of the  Customer's
    Debts. For the purposes of this clause, "Banking Day" means any day except a
    Saturday,  a Sunday  or a legal  holiday  for  Canadian  chartered  banks in
    Vancouver,  British Columbia, and "Rate of Exchange" means, for any relevant
    date and  currency,  the spot rate at which  CIBC,  in  accordance  with its
    normal practise, is able on the relevant date to purchase such currency with
    the Judgment Currency and includes any premium and costs of exchange payable
    in connection with such purchase.

20. Consent  to  Disclose  Information.  CIBC may from time to time give  credit
    information  about me to, or  receive  such  information  from,  any  credit
    bureau,  reporting  agency  or  other  Person,  provided,  however,  that no
    information will be released without my consent.

21. General.  Any provision of this Guarantee that is void or unenforceable in a
    jurisdiction is, as to that jurisdiction, ineffective to that extent without
    invalidating  the  remaining  provisions.  If two or more  Persons sign this
    Guarantee, each Person's liability will be joint and several. This Guarantee
    is in addition  and without  prejudice to any Security of any kind now or in
    the future held by CIBC. There are no representations, collateral agreements
    or  conditions  with  respect to, or  affecting  my  liability  under,  this
    Guarantee other than as contained in this Guarantee.
<PAGE>

23. Definitions.  In this Guarantee:

    (a)   "Bank  Office"  means the CIBC office  noted on the first page of this
          Guarantee,  or such address as CIBC may, from time to time,  advise me
          in the manner provided in Section 6;

    (b)   "Canadian Funds" means lawful currency of Canada;

    (c)   "Credit  Agreement"  means the credit  agreement dated March 11, 1998,
          issued  by  CIBC  to the  Customer  with  respect  to  various  credit
          facilities to be  established  by CIBC in favour of the  Customer,  as
          amended and replaced from time to time;

    (d)   "Customer's  Debts" means the debts and liabilities  that the Customer
          has incurred or may incur with CIBC  pursuant to the Credit  Agreement
          including,  among other things,  those in respect of dealings  between
          the  Customer  and CIBC,  as well as any other  dealings  by which the
          Customer may become  indebted or liable to CIBC in any manner whatever
          pursuant  to such  Credit  Agreement,  anywhere  within or outside the
          country;

    (e)   "Equivalent  Amount in Canadian  Funds"  means at any time on any date
          the amount in Canadian Funds which would result from the conversion of
          U.S.  Funds to Canadian  Funds  determined on the basis of CIBC's spot
          buying rate for U.S.  Funds  against  Canadian  Funds  (including  any
          premium  and  costs of  exchange  payable  in  connection  with such a
          purchase) on such date and at such time);

    (f)   "Guarantor" means any Person who has guaranteed or later guarantees to
          CIBC any or all of the  Customer's  Debts,  whether or not such Person
          has signed this Guarantee or another document;

    (g)   "I", "me" and "my" mean the Person who has signed this Guarantee,  and
          if two or more Persons sign, each of them;

    (h)   "Person"   includes  a  natural   person,   personal   representative,
          partnership,  corporation,  association,  organization,  estate, trade
          union,  church  or  other  religious  organization,  syndicate,  joint
          venture, trust, trustee in bankruptcy,  government and government body
          and any other entity,  and, where appropriate,  specifically  includes
          any Guarantor;

    (i)   "Section" means a section or paragraph of this Guarantee;

    (j)   "Security"  means any security held by CIBC as security for payment of
          the  Customer's  Debts and includes,  among other things,  any and all
          guarantees;

    (k)   "U.S. Funds" means lawful currency of the United States of America.



                                
                                PMC-SIERRA, INC.

               1998 PMC-SIERRA (MARYLAND), INC. STOCK OPTION PLAN


        1.     Purposes  of the  Plan.  The  purposes  of this  1998  PMC-Sierra
(Maryland),  Inc. Stock Option Plan are to provide for the substitution of stock
options  granted  pursuant  to  the  1996  Stock  Plan  of  Integrated   Telecom
Technology,  Inc.  ("IgT"),  and to  retain  the best  available  personnel  for
positions  of  substantial  responsibility,  and to promote  the  success of the
Company's business.

               Options  granted under the Plan may be Incentive Stock Options or
be Nonstatutory Stock Options, as determined by the Administrator at the time of
grant.

        2.     Definitions.  As used herein,  the  following  definitions  shall
apply:

               (a)     "Administrator"  means the Board or any of its Committees
as shall be administering the Plan, in accordance with Section 4 of the Plan.

               (b)     "Applicable Laws" means the requirements  relating to the
administration  of stock  option plans under U.S.  state  corporate  laws,  U.S.
federal and state  securities  laws,  the Code,  any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable  laws of
any foreign country or jurisdiction where Options are, or will be, granted under
the Plan.

               (c)     "Board" means the Board of Directors of the Company.

               (d)     "Code"  means  the  Internal  Revenue  Code of  1986,  as
amended.

               (e)     "Committee"  means a committee of Directors  appointed by
the Board in accordance with Section 4 of the Plan.

               (f)     "Common Stock" means the common stock of the Company.

               (g)     "Company" means PMC-Sierra, Inc., a Delaware corporation.

               (h)     "Consultant"  means any  person,  including  an advisor,
engaged by the  Company or a Parent or  Subsidiary  to render  services  to such
entity.

               (i)     "Director" means a member of the Board.

               (j)     "Disability"  means  total and  permanent  disability  as
defined in Section 22(e)(3) of the Code.
<PAGE>

               (k)     "Employee" means any person, including Officers, employed
by the Company or any Parent or  Subsidiary of the Company.  A Service  Provider
shall  not cease to be an  Employee  in the case of (i) any  bona-fide  leave of
absence  approved  by the Company or (ii)  transfers  between  locations  of the
Company or between the Company,  its Parent,  any Subsidiary,  or any successor.
For purposes of Incentive  Stock Options,  no such leave may exceed ninety days,
unless  reemployment  upon  expiration of such leave is guaranteed by statute or
contract.  Unless provided  otherwise in the Option  Agreement,  if reemployment
upon  expiration  of a  leave  of  absence  approved  by the  Company  is not so
guaranteed,  on the 181st day of such leave any  Incentive  Stock Option held by
the Optionee shall cease to be treated as an Incentive Stock Option and shall be
treated for tax purposes as a Nonstatutory  Stock Option.  Neither  service as a
Director nor payment of a director's  fee by the Company  shall be sufficient to
constitute "employment" by the Company.

               (l)     "Exchange Act" means the Securities Exchange Act of 1934,
as amended.

               (m)     "Fair Market Value" means,  as of any date,  the value of
Common Stock determined as follows:

                       (i)   If the Common  Stock is listed on any  established
stock exchange or a national  market system,  including  without  limitation the
Nasdaq National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market,
its Fair Market  Value  shall be the closing  sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system for
the last market trading day prior to the time of  determination,  as reported in
The  Wall  Street  Journal  or such  other  source  as the  Administrator  deems
reliable;

                       (ii)  If the  Common  Stock  is  regularly  quoted  by a
recognized  securities  dealer but  selling  prices are not  reported,  the Fair
Market  Value of a Share of Common  Stock shall be the mean between the high bid
and low asked prices for the Common  Stock on the last market  trading day prior
to the day of  determination,  as reported  in The Wall  Street  Journal or such
other source as the Administrator deems reliable;

                       
                       (iii) In the  absence of an  established  market for the
Common  Stock,  the Fair Market Value shall be  determined  in good faith by the
Administrator.

               (n)     "Incentive  Stock  Option"  means an Option  intended  to
qualify as an incentive  stock  option  within the meaning of Section 422 of the
Code and the regulations promulgated thereunder.

               (o)     "Nonstatutory Stock Option" means an Option  not intended
to qualify as an Incentive Stock Option.

               (p)     "Notice of Grant" means a  written or  electronic  notice
evidencing  certain  terms and  conditions of an  individual  Option grant.  The
Notice of Grant is part of the Option Agreement.

               (q)     "Officer" means a person who is an officer of the Company
within  the  meaning  of  Section  16 of the  Exchange  Act  and the  rules  and
regulations promulgated thereunder.

               (r)     "Option"  means a stock  option  granted  pursuant to the
Plan.
<PAGE>

               (s)     "Option Agreement" means an agreement between the Company
and an Optionee  evidencing  the terms and  conditions of an  individual  Option
grant. The Option Agreement is subject to the terms and conditions of the Plan.

               (t)     "Option   Exchange   Program"  means  a  program  whereby
outstanding  options  are  surrendered  in  exchange  for  options  with a lower
exercise price.

               (u)      "Optioned  Stock" means the Common  Stock  subject to an
Option.

               (v)      "Optionee"  means the  holder of an  outstanding  Option
granted under the Plan.

               (w)      "Parent"  means a "parent  corporation,"  whether now or
hereafter existing, as defined in Section 424(e) of the Code.

               (x)      "Plan" means this 1998 PMC-Sierra (Maryland), Inc. Stock
Option Plan.

               (y)      "Service   Provider"  means  an  Employee  including  an
Officer, Consultant or Director.

               (z)      "Share" means a share of the Common  Stock,  as adjusted
in accordance with Section 12 of the Plan.

               (aa)     "Subsidiary"  means a "subsidiary  corporation," whether
now or hereafter existing, as defined in Section 424(f) of the Code.

        3.     Stock Subject to the Plan.  Subject to the provisions of Section
12 of the Plan, the maximum aggregate number of Shares which may be optioned and
sold under the Plan is Two  Hundred  Fourteen  Thousand  Four  Hundred  Fourteen
(214,414)  Shares.  The Shares may be  authorized,  but unissued,  or reacquired
Common Stock.

               If an Option expires or becomes unexercisable without having been
exercised in full, or is surrendered pursuant to an Option Exchange Program, the
unpurchased  Shares which were subject thereto shall become available for future
grant or sale under the Plan (unless the Plan has terminated).

        4.     Administration of the Plan.

               (a)      Administration.  The Plan shall be  administered  by (i)
the Board or (ii) a Committee,  which  committee shall be constituted to satisfy
Applicable Laws.

               (b)      Powers of the  Administrator.  Subject to the provisions
of the Plan,  and in the case of a  Committee,  subject to the  specific  duties
delegated  by the Board to such  Committee,  the  Administrator  shall  have the
authority, in its discretion:

                       (i)    to  determine  the Fair Market Value of the Common
Stock;

                       (ii)   to select the Service  Providers  to whom  Options
may be granted hereunder;
<PAGE>

                       (iii)  to  determine  whether and to what extent  Options
are granted hereunder;

                       (iv)   to determine  the number of shares of Common Stock
to be covered by each Option granted hereunder;

                       (v)    to approve  forms of  agreement  for use under the
Plan;

                       (vi)   to  determine  the  terms  and   conditions,   not
inconsistent  with the terms of the Plan, of any award granted  hereunder.  Such
terms and conditions  include,  but are not limited to, the exercise price,  the
time or times when Options may be exercised  (which may be based on  performance
criteria),  any vesting acceleration or waiver of forfeiture  restrictions,  and
any restriction or limitation regarding any Option or the shares of Common Stock
relating thereto,  based in each case on such factors as the  Administrator,  in
its sole discretion, shall determine;

                       (vii)  to reduce the exercise  price of any Option to the
then  current  Fair Market  Value if the Fair Market  Value of the Common  Stock
covered  by such  Option  shall  have  declined  since the date the  Option  was
granted;

                       (viii) to institute an Option Exchange Program;

                       (ix)   to construe  and  interpret  the terms of the Plan
and awards granted pursuant to the Plan;

                       (x)    to   prescribe,   amend  and  rescind   rules  and
regulations  relating to the Plan,  including rules and regulations  relating to
sub-plans  established for the purpose of qualifying for preferred tax treatment
under foreign tax laws;

                       (xi)   to modify or amend each Option (subject to Section
14(b)  of the  Plan),  including  the  discretionary  authority  to  extend  the
post-termination  exercisability  period of  Options  longer  than is  otherwise
provided for in the Plan;

                       (xii)  to  authorize  any  person to execute on behalf of
the Company any instrument  required to effect the grant of an Option previously
granted by the Administrator;

                       (xiii) to determine the terms and restrictions applicable
to Options;

                       (xiv)  to allow  Optionees  to  satisfy  withholding  tax
obligations  by  electing  to have the  Company  withhold  from the Shares to be
issued upon  exercise  of an Option  that number of Shares  having a Fair Market
Value equal to the amount required to be withheld.  The Fair Market Value of the
Shares to be withheld  shall be determined on the date that the amount of tax to
be withheld is to be  determined.  All  elections  by an Optionee to have Shares
withheld for this purpose  shall be made in such form and under such  conditions
as the Administrator may deem necessary or advisable; and

                       (xv)   to make all other determinations  deemed necessary
or advisable for administering the Plan.
<PAGE>

               (c)     Effect of Administrator's  Decision.  The Administrator's
decisions,  determinations and interpretations shall be final and binding on all
Optionees and any other holders of Options.

        5.     Eligibility. Options may be granted to Service Providers.

        6.     Limitation.  Neither the Plan nor any Option shall confer upon an
Optionee any right with respect to continuing the Optionee's  relationship  as a
Service Provider with the Company,  nor shall they interfere in any way with the
Optionee's  right or the Company's  right to terminate such  relationship at any
time, with or without cause.

        7.     Term of Plan.  The Plan shall become  effective upon its adoption
by the Board.  It shall  continue  in effect for ten (10) years,  unless  sooner
terminated under Section 14 of the Plan.

        8.     Term of Option.  The term of each Option  shall be  stated in the
Option Agreement.

        9.     Option Exercise Price and Consideration.

               (a)      Exercise  Price.  The per share  exercise  price for the
Shares to be issued pursuant to exercise of an Option shall be determined by the
Administrator.

               (b)      Waiting Period and Exercise Dates. At the time an Option
is granted,  the Administrator  shall fix the period within which the Option may
be exercised and shall determine any conditions  which must be satisfied  before
the Option may be exercised.

               (c)      Form of Consideration. The Administrator shall determine
the acceptable  form of  consideration  for exercising an Option,  including the
method of payment. Such consideration may consist entirely of:

                       (i)   cash;

                       (ii)  check;

                       (iii) promissory note;

                       (iv)  other  Shares  which  (A) in the  case  of  Shares
acquired  upon  exercise of an option,  have been owned by the Optionee for more
than six months on the date of  surrender,  and (B) have a Fair Market  Value on
the date of surrender equal to the aggregate  exercise price of the Shares as to
which said Option shall be exercised;

                       (v)    consideration  received  by the  Company  under  a
cashless  exercise  program  implemented  by the Company in connection  with the
Plan;

                       (vi)   a reduction in the amount of any Company liability
to  the  Optionee,  including  any  liability  attributable  to  the  Optionee's
participation  in  any   Company-sponsored   deferred  compensation  program  or
arrangement;
<PAGE>

                       (vii)  such other consideration and method of payment for
the issuance of Shares to the extent permitted by Applicable Laws; or

                       (viii) any  combination  of  the  foregoing   methods  of
payment.

        10.    Exercise of Option.

               (a)      Procedure for  Exercise;  Rights as a  Stockholder.  Any
Option granted hereunder shall be exercisable according to the terms of the Plan
and at such times and under such  conditions as determined by the  Administrator
and set forth in the  Option  Agreement.  An Option may not be  exercised  for a
fraction of a Share.

                        An Option  shall be deemed  exercised  when the  Company
receives:  (i) written or electronic  notice of exercise (in accordance with the
Option Agreement) from the person entitled to exercise the Option, and (ii) full
payment  for the Shares  with  respect to which the  Option is  exercised.  Full
payment may consist of any consideration and method of payment authorized by the
Administrator  and permitted by the Option Agreement and the Plan. Shares issued
upon  exercise of an Option shall be issued in the name of the  Optionee.  Until
the Shares are issued (as evidenced by the appropriate entry on the books of the
Company or of a duly authorized transfer agent of the Company), no right to vote
or receive  dividends  or any other  rights as a  stockholder  shall  exist with
respect to the Optioned Stock,  notwithstanding  the exercise of the Option. The
Company  shall  issue (or cause to be issued)  such  Shares  promptly  after the
Option is exercised.  No  adjustment  will be made for a dividend or other right
for which the record date is prior to the date the Shares are issued,  except as
provided in Section 12 of the Plan.

                        Exercising  an Option in any manner  shall  decrease the
number of Shares  thereafter  available,  both for  purposes of the Plan and for
sale  under the  Option,  by the  number  of  Shares  as to which the  Option is
exercised.

               (b)      Termination of Relationship as a Service Provider. If an
Optionee ceases to be a Service  Provider,  other than upon the Optionee's death
or Disability, the Optionee may exercise his or her Option, but only within such
period of time as is specified in the Option  Agreement,  and only to the extent
that the Option is vested on the date of termination (but in no event later than
the expiration of the term of such Option as set forth in the Option Agreement).
In the absence of a specified  time in the Option  Agreement,  the Option  shall
remain  exercisable for three (3) months  following the Optionee's  termination.
If, on the date of  termination,  the  Optionee  is not  vested as to his or her
entire Option,  the Shares  covered by the unvested  portion of the Option shall
revert to the Plan. If, after termination, the Optionee does not exercise his or
her Option  within the time  specified  by the  Administrator,  the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

               (c)      Disability  of Optionee.  If an Optionee  ceases to be a
Service  Provider as a result of the  Optionee's  Disability,  the  Optionee may
exercise  his or her Option  within such period of time as is  specified  in the
Option Agreement,  to the extent the Option is vested on the date of termination
(but in no event  later than the  expiration  of the term of such  Option as set
forth in the Option Agreement). In the absence of a specified time in the Option
Agreement,  the Option shall remain exercisable for twelve (12) months following
the Optionee's termination.  If, on the date of termination, the Optionee is not
vested as to his or her  entire  Option,  the  Shares  covered  by the  unvested
portion of the Option  shall  revert to the Plan.  If,  after  termination,  the
Optionee does not exercise his or her Option within the time  specified  herein,
the Option shall  terminate,  and the Shares covered by such Option shall revert
to the Plan.
<PAGE>

               (d)      Death of Optionee.  If an Optionee  dies while a Service
Provider, the Option may be exercised within such period of time as is specified
in the Option  Agreement  (but in no event later than the expiration of the term
of such Option as set forth in the Notice of Grant), by the Optionee's estate or
by a person  who  acquires  the  right to  exercise  the  Option by  bequest  or
inheritance,  but only to the  extent  that the  Option is vested on the date of
death.  In the absence of a specified time in the Option  Agreement,  the Option
shall  remain  exercisable  for twelve  (12)  months  following  the  Optionee's
termination.  If, at the time of death,  the Optionee is not vested as to his or
her entire  Option,  the Shares  covered by the  unvested  portion of the Option
shall  immediately  revert to the  Plan.  The  Option  may be  exercised  by the
executor or administrator of the Optionee's estate or, if none, by the person(s)
entitled to exercise the Option under the Optionee's will or the laws of descent
or  distribution.  If the Option is not so exercised  within the time  specified
herein, the Option shall terminate,  and the Shares covered by such Option shall
revert to the Plan.

        11.    Non-Transferability of Options.Unless determined otherwise by the
Administrator,  an  Option  may not be sold,  pledged,  assigned,  hypothecated,
transferred,  or disposed of in any manner  other than by will or by the laws of
descent  or  distribution  and may be  exercised,  during  the  lifetime  of the
Optionee,   only  by  the  Optionee.   If  the  Administrator  makes  an  Option
transferable,  such Option shall contain such additional terms and conditions as
the Administrator deems appropriate.

        12.    Adjustments Upon Changes in Capitalization,  Dissolution, Merger
or Asset Sale.

               (a)     Changes  in  Capitalization.  Subject  to  any   required
action by the stockholders of the Company,  the number of shares of Common Stock
covered by each  outstanding  Option,  and the number of shares of Common  Stock
which  have  been  authorized  for  issuance  under  the Plan but as to which no
Options  have yet been  granted  or which  have been  returned  to the Plan upon
cancellation  or  expiration  of an  Option,  as well as the  price per share of
Common Stock covered by each such outstanding  Option,  shall be proportionately
adjusted for any  increase or decrease in the number of issued  shares of Common
Stock  resulting  from a stock  split,  reverse  stock  split,  stock  dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of  consideration  by the Company;  provided,  however,  that  conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of  consideration."  Such adjustment shall be made by the Board,
whose  determination  in that respect  shall be final,  binding and  conclusive.
Except as  expressly  provided  herein,  no issuance by the Company 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 or price of shares of Common Stock subject to an Option.

               (b)      Dissolution or Liquidation. In the event of the proposed
dissolution  or   liquidation  of  the  Company,   each  Option  will  terminate
immediately  prior to the  consummation of such proposed action or at such other
time  and  subject  to such  other  conditions  as shall  be  determined  by the
Administrator.
<PAGE>

               (c)      Merger  or Asset  Sale.  In the event of a merger of the
Company with or into another  corporation,  or the sale of substantially  all of
the assets of the Company,  each  outstanding  Option shall (i) be assumed or an
equivalent option or right substituted by the successor  corporation or a Parent
or  Subsidiary  of the successor  corporation,  (ii) upon written  notice the to
Optionees, provide that all outstanding Options must be exercised, to the extent
then  exercisable  or be  exercisable  as a result of the merger or asset  sale,
within a  specified  number  of days of the date of such  notice,  at the end of
which notice period, outstanding Options shall terminate, or (iii) terminate all
outstanding  Options in exchange for a cash  payment  equal to the excess of the
Fair  Market  Value of the Shares  subject to such  Options  (to the extent then
exercisable  or be exercisable as a result of the merger or asset sale) over the
exercise price thereof.

               For  the  purposes  of  this  paragraph,   the  Option  shall  be
considered  assumed if,  following  the merger or sale of assets,  the option or
right  confers  the right to  purchase  or  receive,  for each Share of Optioned
Stock,  immediately  prior to the  merger or sale of assets,  the  consideration
(whether stock, cash, or other securities or property) received in the merger or
sale of assets by holders of Common  Stock for each Share held on the  effective
date of the transaction (and if holders were offered a choice of  consideration,
the type of consideration chosen by the holders of a majority of the outstanding
Shares); provided, however, that if such consideration received in the merger or
sale of assets is not solely  common stock of the successor  corporation  or its
Parent,  the Administrator  may, with the consent of the successor  corporation,
provide for the  consideration  to be received  upon the exercise of the Option,
for each Share of  Optioned  Stock to be solely  common  stock of the  successor
corporation  or  its  Parent  equal  in  fair  market  value  to the  per  share
consideration  received  by  holders  of Common  Stock in the  merger or sale of
assets.

        13.    Date of Grant.  The date of grant of an Option  shall be, for all
purposes,  the date on which the Administrator makes the determination  granting
such Option,  or such other later date as is  determined  by the  Administrator.
Notice  of the  determination  shall  be  provided  to each  Optionee  within  a
reasonable time after the date of such grant.

        14.    Amendment and Termination of the Plan.

               (a)     Amendment  and  Termination.  The  Board  may at any time
amend, alter, suspend or terminate the Plan.

               (b)     Effect  of   Amendment  or  Termination.   No  amendment,
alteration, suspension or termination of the Plan shall impair the rights of any
Optionee,  unless  mutually  agreed  otherwise  between  the  Optionee  and  the
Administrator, which agreement must be in writing and signed by the Optionee and
the  Company.  Termination  of the Plan  shall not  affect  the  Administrator's
ability to exercise the powers  granted to it hereunder  with respect to options
granted under the Plan prior to the date of such termination.

        15.    Conditions Upon Issuance of Shares.

               (a) Legal Compliance.  Shares shall not be issued pursuant to the
exercise of an Option  unless the  exercise of such Option and the  issuance and
delivery of such Shares shall comply with  Applicable  Laws and shall be further
subject  to the  approval  of  counsel  for the  Company  with  respect  to such
compliance.

               (b) Investment Representations. As a condition to the exercise of
an Option the Company may require the person exercising such Option to represent
and warrant at the time of any such exercise that the Shares are being purchased
only for investment and without any present intention to sell or distribute such
Shares if, in the opinion of counsel for the Company,  such a representation  is
required.
<PAGE>

        16.    Inability to Obtain  Authority.  The  inability of the Company to
obtain authority from any regulatory body having  jurisdiction,  which authority
is deemed by the  Company's  counsel to be necessary to the lawful  issuance and
sale of any Shares  hereunder,  shall  relieve the Company of any  liability  in
respect of the failure to issue or sell such  Shares as to which such  requisite
authority shall not have been obtained.

        17.    Reservation of Shares. The Company, during the term of this Plan,
will at all times reserve and keep  available  such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.



                                PMC-Sierra, Inc.
                        CALCULATION OF EARNINGS PER SHARE
                  (in thousands, except for per share amounts)
                                   (unaudited)

                                                          Three Months Ended
                                                      --------------------------
                                                         Jun 28,        Jun 30,
                                                          1998           1997
                                                                    
Numerator:                                                          
Net income (loss)                                     $   (40,823)   $    8,932
                                                      ============   ===========

Denominator:                                                        
  Basic weighted average common shares                               
  outstanding (1)                                          31,829        30,918
                                                      ------------   -----------
                                                                    
  Effect of dilutive securities:                                        
    Stock options                                               -         1,442
    Stock warrants                                              -            14
                                                      ------------   -----------
  Shares used in calculation of net income per share       31,829        32,374
                                                      ============   ===========
                                                                    
Basic net income (loss) per share                     $     (1.28)   $     0.29
                                                                    
Diluted net income (loss) per share                   $     (1.28)   $     0.28
                                                                   
                                                                  

(1) PMC-Sierra, Ltd. Special Shares are included in the calculation of basic net
    income per share.


<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE  CONTAINS SUMMARY  FINANCIAL  INFORMATION  EXTRACTED FROM THE FORM
10-Q FILED FOR THE QUARTER ENDED JUNE 28, 1998 AND IS  QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                    1,000

       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>               Dec-27-1998
<PERIOD-START>                  Dec-29-1997
<PERIOD-END>                    Jun-28-1998
<CASH>                               60,872
<SECURITIES>                              0
<RECEIVABLES>                        20,858
<ALLOWANCES>                              0
<INVENTORY>                           6,212
<CURRENT-ASSETS>                     91,928
<PP&E>                               46,342
<DEPRECIATION>                      (19,912)
<TOTAL-ASSETS>                      160,621
<CURRENT-LIABILITIES>                47,384
<BONDS>                                   0
                     0
                               0
<COMMON>                                 30
<OTHER-SE>                           92,846
<TOTAL-LIABILITY-AND-EQUITY>        160,621
<SALES>                              74,270
<TOTAL-REVENUES>                     74,270
<CGS>                                18,030
<TOTAL-COSTS>                        18,030
<OTHER-EXPENSES>                     78,152
<LOSS-PROVISION>                          0
<INTEREST-EXPENSE>                      519
<INCOME-PRETAX>                     (20,338)
<INCOME-TAX>                         10,836
<INCOME-CONTINUING>                 (31,174)
<DISCONTINUED>                            0
<EXTRAORDINARY>                           0
<CHANGES>                                 0
<NET-INCOME>                        (31,174)
<EPS-PRIMARY>                         (0.98)
<EPS-DILUTED>                         (0.98)
                                



</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission