Exhibit 99.1

                 PMC-Sierra Reports Second Quarter 2006 Results

     SANTA CLARA, Calif.--(BUSINESS WIRE)--July 20, 2006--PMC-Sierra, Inc.
(Nasdaq:PMCS):

     --   Q2 Net Revenues: $ 118.8 million

     --   Q2 Non-GAAP Net Income: $ 19.4 million or $0.09 per share (fully
          diluted)

     --   Q2 GAAP Net Loss: $ (31.3) million or $(0.15) per share

     PMC-Sierra, Inc. (Nasdaq:PMCS), a leading provider of high-speed broadband
communications and storage semiconductors, today reported results for the second
quarter ending July 2, 2006.
     Net revenues in the second quarter of 2006 were $118.8 million, an increase
of 35% compared with $87.8 million in the first quarter of 2006 and 66% higher
than in the second quarter of 2005. Net revenues in the second quarter of 2006
included: (i) $8.8 million in revenue from the previously announced acquisition
of Passave Inc., which closed on May 4, 2006; and (ii) a full three months of
revenue from the acquisition of the Avago storage semiconductor business
compared with only one month of revenue from this acquisition in the first
quarter of 2006.
     Net income in the second quarter of 2006 on a non-GAAP basis was $19.4
million (non-GAAP diluted earnings per share of $0.09) compared with non-GAAP
net income of $16.3 million (non-GAAP diluted earnings per share of $0.08) in
the first quarter of 2006. GAAP net loss in the second quarter of 2006 was $31.3
million (GAAP loss per share of $0.15) compared with GAAP net loss in the first
quarter of 2006 of $14.3 million (GAAP loss per share of $0.08). Non-GAAP net
income for the second quarter excludes: (i) $20.5 million charge for in-process
R&D and a $9.9 million amortization of purchased intangible assets associated
with the purchases of Passave and the Avago storage semiconductor business; (ii)
$5.7 million in adjustments and acquisition costs included in the Cost of
Revenue related to the Passave and Avago acquisitions; (iii) $9.4 million in
stock-based compensation expenses; and (iv) $3.2 million to write down an
investment in a private company.
     For a full reconciliation of GAAP net loss to non-GAAP net income, please
refer to the schedule on page 7 of this release. The Company believes the
addition of non-GAAP measures are useful to investors for the purpose of
financial analysis. Management uses the non-GAAP measures internally to evaluate
its in-period operating performance before gains, losses and other charges that
are considered by management to be outside of the Company's core operating
results. In addition, the measures are used to plan for the Company's future
periods. However, non-GAAP measures are neither stated in accordance with, nor
are they a substitute for, GAAP measures.
     "In the second quarter, we successfully integrated the Avago storage
semiconductor business into PMC's operations and we also closed the acquisition
of Passave Inc., the leader in Fiber To The Home semiconductor solutions," said
Bob Bailey, chairman and chief executive officer of PMC-Sierra. "And our
Enterprise Storage business showed strength in the second quarter as the Fibre
Channel transition from 2Gb/s to 4Gb/s has accelerated."

     Company announcements in Q2 2006 and subsequent include:

     --   PMC-Sierra wins Gold Medal supplier award from Huawei: PMC announced
          it received a prestigious Gold Medal Supplier Award from Huawei
          Technologies, China's leading telecommunications equipment company,
          for the superior service and support that PMC provides to its
          customer. PMC-Sierra is a key supplier to Huawei and has provided
          semiconductor devices and solutions to Huawei's datacom,
          next-generation networks, wireless, and optical transport business
          segments.

     --   Carrier Class Multi-Service Residential Gateway Solution: PMC
          announced an enhanced residential gateway platform to enable
          carrier-grade services into the digital home. The solution is based on
          PMC-Sierra's new VoIP-enabled Multi-Service Processor family, the
          MSP7120 for ADSL2+ and the MSP7130 for Passive Optical Networks and
          VDSL. These System-on-Chip products provide the basis for delivery of
          IPTV, VoIP and multimedia services. The MSP7100 gateway platform
          delivers 180,000 packets-per-second IP forwarding to support
          high-bandwidth broadband access such as VDSL2 and Fiber To The Home.

     --   Stand-alone VDSL2 Analog Front End: PMC announced an Analog Front End
          (AFE) for VDSL2 and ADSL2+ customer premises equipment. The highly
          integrated CMOS device is a stand-alone VDSL2 AFE that allows
          equipment manufacturers to quickly bring to market VDSL2 modem or
          residential gateway products. VDSL2 technology allows Service
          Providers to offer significantly faster and more robust broadband
          connections to support the deployment of IPTV and other advanced IP
          services.

     --   Security-enabled 1Ghz System-on-Chip: PMC announced its first
          System-on-Chip solution featuring standards-based integrated hardware
          security. The SoC incorporates a high-performance scalable 600 MHz to
          one GHz E9000 MIPS-based processor with integrated security in
          hardware and is targeted at Small Medium Business network attached
          storage, mid-range VPN routers and security appliances, and
          printer/imaging systems.

     --   Fiber To The Home Access Acquisition: On May 4th 2006, PMC-Sierra
          announced that it had completed the acquisition of Passave, Inc., a
          leading developer of system-on-chip semiconductor solutions for the
          Fiber To The Home (FTTH) semiconductor market. Passave's semiconductor
          solutions enable Service Providers to offer voice, video and data at
          up to 1Gbps over Passive Optical Networking (PON) equipment. The
          Passave product line includes system-on-chip solutions for Optical
          Line Terminals for the Central Office as well as Optical Network
          Terminals and Optical Network Units solutions for residential
          termination equipment.

     Second Quarter 2006 Conference Call

     Management will review the second quarter 2006 results and provide guidance
for the third quarter of 2006 during a conference call at 1:30 p.m. Pacific
Time/4:30 p.m. Eastern Time on July 20, 2006. To listen to the call, investors
can access an audio webcast of the conference call on the Financial Events and
Calendar section at http://investor.pmc-sierra.com/. A replay of this webcast
will be posted and available two hours after the conference call has been
completed. To listen to the conference call live by telephone, please dial
719-457-2693 approximately ten minutes before the start time. A telephone replay
will be available 15 minutes after the completion of the call and can be
accessed by dialing 719-457-0820 (replay access code is 9967412). A replay of
the webcast will be available for five business days.

     Third Quarter 2006 Conference Call

     PMC-Sierra is planning on releasing its results for the third quarter of
2006 on October 19th. A conference call will be held on the day of the release
to review the quarter and provide an outlook for the fourth quarter of 2006.

     Safe Harbor Statement

     This press release may contain forward-looking statements, which are
subject to risks and uncertainties. Actual results may differ from projections.
The Company's SEC filings describe more fully the risks associated with the
Company's business including PMC-Sierra's limited revenue visibility due to
variable customer demands, orders with short delivery lead times and customer
concentration, and uncertainties relating to the impact on PMC-Sierra's business
from the purchase of Avago's storage semiconductor business and the acquisition
of Passave. The Company does not undertake any obligation to update the
forward-looking statements.

     About PMC-Sierra

     PMC-Sierra(TM) is a leading provider of broadband communications and
storage semiconductors for metro, access, fiber to the home, wireless
infrastructure, storage, laser printers and customer premises equipment.
PMC-Sierra offers worldwide technical and sales support, including a network of
offices throughout North America, Europe, Israel and Asia. The company is
publicly traded on the NASDAQ Stock Market under the PMCS symbol and is included
in the S&P 500 Index. For more information, visit www.pmc-sierra.com.
     (C) Copyright PMC-Sierra, Inc. 2006. All rights reserved. PMC is a
registered trademark of PMC-Sierra, Inc. in the United States and other
countries. PMC-SIERRA, PMCS and "Thinking You can Build On" are trademarks of
PMC-Sierra, Inc. Other product and company names mentioned herein may be
trademarks of their respective owners.


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


                           Three Months Ended       Six Months Ended
                    -------------------------------------------------
                       Jul 2,    Apr 2,    Jul 3,    Jul 2,    Jul 3,
                        2006      2006      2005      2006      2005

Net revenues        $118,780  $ 87,781  $ 71,541  $206,561  $137,652

Cost of revenues      43,519    26,625    21,372    70,144    40,993
                     --------  --------  --------  --------  --------
  Gross profit        75,261    61,156    50,169   136,417    96,659


Other costs and
 expenses:
  Research and
   development        41,344    33,749    29,456    75,093    60,872
  Selling, general
   and administrative 26,883    19,593    13,466    46,476    26,470
  Amortization of
   purchased
   intangible assets   9,934     2,110         -    12,044         -
  In-process research
   and development    20,500    14,800         -    35,300         -
  Restructuring costs
   and other charges       -      (738)    7,606      (738)    8,474
                     --------  --------  --------  --------  --------
(Loss) income from
 operations          (23,400)   (8,358)     (359)  (31,758)      843

Other income
 (expense):
 Interest income, net  1,267     3,566     2,502     4,833     5,187
 Foreign exchange
  (loss) gain         (3,378)       13       512    (3,365)      (78)
 Loss on
  extinguishment of
  debt and
  amortization of
  debt issue costs      (242)     (242)        -      (484)   (1,634)
 (Loss) gain on
   investments        (3,118)    1,849         -    (1,269)    1,439
                     --------  --------  --------  --------  --------
(Loss) income before
 provision for
 income taxes        (28,871)   (3,172)    2,655   (32,043)    5,757

Provision for income
 taxes                (2,388)  (11,161)   (2,126)  (13,549)   (1,951)
                     --------  --------  --------  --------  --------
Net (loss) income   $(31,259) $(14,333) $    529  $(45,592) $  3,806
                     ========  ========  ========  ========  ========

Net (loss) income
 per common share -
 basic              $  (0.15) $  (0.08) $   0.00  $  (0.23) $   0.02

Net (loss) income
 per common share -
 diluted            $  (0.15) $  (0.08) $   0.00  $  (0.23) $   0.02

Shares used in per
 share calculation -
 basic               203,067   187,218   183,386   195,143   182,789
Shares used in per
 share calculation -
 diluted             203,067   187,218   188,305   195,143   188,492


As a supplement to the Company's consolidated financial statements
presented on a generally accepted accounting principles (GAAP) basis,
the Company provides additional non-GAAP measures for net income and
net income per share in its press release.

A non-GAAP financial measure is a numerical measure of a company's
performance, financial position, or cash flows that either excludes or
includes amounts that are not normally excluded or included in the
most directly comparable measure calculated and presented in
accordance with GAAP. The Company believes that the additional non-
GAAP measures are useful to investors for the purpose of financial
analysis. Management uses these measures internally to evaluate the
Company's in-period operating performance before gains, losses and
other charges that are considered by management to be outside of the
Company's core operating results. In addition, the measures are used
for planning and forecasting of the Company's future periods. However,
non-GAAP measures are not in accordance with, nor are they a
substitute for, GAAP measures. Other companies may use different
non-GAAP measures and presentation of results.


                           PMC-Sierra, Inc.
    Reconciliation of GAAP net (loss) income to Non-GAAP net income
             (in thousands, except for per share amounts)
                              (unaudited)

                        Three Months Ended        Six Months Ended
                   ----------------------------- -------------------
                    Jul 2,    Apr 2,    Jul 3,    Jul 2,    Jul 3,
                    2006 (1)  2006 (2)  2005 (3)  2006 (4)  2005 (5)

GAAP net (loss)
 income            $(31,259) $(14,333) $    529  $(45,592) $  3,806

Included in Cost of
 revenues:
  Stock-based
   compensation         448       423         -       871         -
  Acquisition-
   related costs      5,676     3,273         -     8,949         -

Included in Other
 costs and
 expenses:
  Stock-based
   compensation       9,000     5,478       215    14,478       215
  Acquisition-
   related costs          -       222         -       222         -
  Amortization of
   intangible
   assets             9,934     2,110         -    12,044         -
  In-process
   research and
   development       20,500    14,800         -    35,300         -
  Restructuring
   costs and other
   charges                -      (738)    7,606      (738)    8,474
  Elimination of
   provision              -         -      (900)        -      (900)

Included in Other
 income (expense):
  Loss on
   extinguishment
   of debt                -         -         -         -     1,618
  Loss (Gain) on
   investments        3,118    (1,849)        -     1,269    (1,439)
  Foreign exchange
   (gain) loss on
   Canadian taxes     3,295      (113)     (522)    3,182       188

Included in
 Provision for
 income taxes :
  Recovery of prior
   year income
   taxes                  -         -         -         -      (998)
  Withholding and
   other taxes on
   repatriation of
   funds                  -     7,036         -     7,036         -
  Income tax effect
   of above items    (1,307)       38       315    (1,269)      165
                    --------  --------  --------  --------  --------
Non-GAAP net
 income            $ 19,405  $ 16,347  $  7,243  $ 35,752  $ 11,129
                    ========  ========  ========  ========  ========

Non-GAAP net income
 per share -
 diluted           $   0.09  $   0.08  $   0.04  $   0.17  $   0.06

Shares used to
 calculate non-GAAP
 net income per
 share - diluted    214,600   196,674   188,305   205,637   188,492


Non-GAAP adjustments

(1) $9.4 million stock-based compensation expense; $5.4 million
purchase accounting adjustment to inventory and $0.3 million in
additional acquisition-related contractor costs included in Cost of
revenues; $9.9 million amortization of purchased intangible assets and
a $20.5 million charge for in-process research and development from
the purchase of Passave, Inc.; $3.2 million write-down of an
investment net of a $0.1 million gain on sale of an investment; $3.3
million foreign exchange loss on Canadian taxes; and $1.3 million
income tax effect of these non-GAAP adjustments.

(2) $5.9 million stock-based compensation expense; $3.5 million
acquisition-related costs comprised of a $2.8 million purchase
accounting adjustment to inventory and $0.5 million in additional
contractor costs included in Cost of revenues, and $0.2 million
relocation expenses included in Selling, general and administrative
expenses; $2.1 million amortization of purchased intangible assets and
a $14.8 million charge for in-process research and development from
the purchase of the Avago Storage Semiconductor Business; $0.7 million
net reduction in restructuring comprised of $2.3 million reversal of
provision for excess facilities and $1.6 million additional severance;
$1.8 million net gain on sale of investments; $0.1 million foreign
exchange gain on Canadian taxes; $7.0 million withholding and other
taxes on repatriation of funds; and the income tax effect of these
non-GAAP adjustments.

(3) $0.2 million amortization of deferred stock compensation; $7.6
million restructuring costs including $6.6 million for workforce
reduction and $1.0 million for asset write-downs; $0.9 million
reversal of provision for doubtful accounts receivable; $0.5 million
foreign exchange gain on Canadian taxes and $0.3 million income tax
effect related to these non-GAAP adjustments.

(4) $15.3 million stock-based compensation expense; $9.2 million
acquisition-related costs comprised of a $8.2 million purchase
accounting adjustments to inventory and $0.8 million in additional
contractor costs included in Cost of revenues, and $0.2 million
relocation expenses included in Selling, general and administrative
expenses; $12.0 million amortization of purchased intangible assets
and $35.3 million in charges for in-process research and development
from the purchases of Passave and the Avago Storage Semiconductor
Business; $0.7 million net reduction in restructuring comprised of
$2.3 million reversal of provision for excess facilities and $1.6
million additional severance; $1.3 million net loss on investments
including a $3.2 million write-down, offset by $1.9 million gains on
sales of investments; $3.2 million foreign exchange loss on Canadian
taxes; $7.0 million withholding and other taxes on repatriation of
funds; and the income tax effect of these non-GAAP adjustments.

(5) $0.2 million amortization of deferred stock compensation; $8.5
million restructuring costs including $7.5 million for workforce
reduction and $1.0 million for asset write-downs; $0.9 million
reversal of provision for doubtful accounts receivable; $1.6 million
loss on extinguishment of debt, $1.4 million gain on sales of property
and investments, $1.0 million reversal of state income tax; $0.2
million foreign exchange loss on Canadian taxes, and $0.2 million
income tax effect relating to these non-GAAP adjustments.



                           PMC-Sierra, Inc.
                 CONDENSED CONSOLIDATED BALANCE SHEETS
                            (in thousands)
                              (unaudited)

                                                   Jul 2,     Dec 31,
                                                    2006       2005

ASSETS:
Current assets:
 Cash and short-term investments                $  232,326  $ 627,476
 Accounts receivable, net                           52,657     31,799
 Inventories, net                                   33,312     14,046
 Prepaid expenses and other current assets          29,376     13,630
                                                 ----------  ---------
  Total current assets                             347,671    686,951

Other investments and assets                         8,464     16,390
Property and equipment, net                         21,042     10,981
Goodwill                                           390,897      7,907
Intangible assets, net                             243,623      5,575
Deposits for wafer fabrication capacity              5,145      5,145
                                                 ----------  ---------
                                                $1,016,842  $ 732,949
                                                 ==========  =========

LIABILITIES AND STOCKHOLDERS' EQUITY:
Current liabilities:
 Accounts payable                               $   30,712  $  21,507
 Accrued liabilities                                52,043     40,619
 Income taxes payable                               38,321     32,050
 Deferred income taxes                               2,408      1,037
 Accrued restructuring costs                        10,805     15,233
 Deferred income                                    12,487     11,004
                                                 ----------  ---------
  Total current liabilities                        146,776    121,450

2.25% Senior convertible notes due
 October 15, 2025                                  225,000    225,000
Deferred taxes and other tax liabilities            43,162     29,090

PMC special shares convertible into 2,099
 (2005 - 2,459) shares of common stock               2,732      3,362

Stockholders' equity
 Capital stock and additional paid in capital    1,210,329    919,055
 Accumulated other comprehensive income              1,166      1,723
 Accumulated deficit                              (612,323)  (566,731)
                                                 ----------  ---------
  Total stockholders' equity                       599,172    354,047
                                                 ----------  ---------
                                                $1,016,842  $ 732,949
                                                 ==========  =========


                           PMC-Sierra, Inc.
            CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                            (in thousands)
                              (unaudited)

                                                 Six Months Ended
                                               ---------------------
                                                  Jul 2,     Jul 3,
                                                   2006       2005

Cash flows from operating activities:
 Net (loss) income                             $ (45,592) $   3,806
 Adjustments to reconcile net (loss) income
  to net cash (used in) provided by operating
  activities:
   Stock-based compensation                       15,349          -
   Depreciation and amortization                  18,246      5,805
   In-process research and development            35,300          -
   Impairment of purchased intangible assets           -        538
   Loss on extinguishment of debt                      -      1,618
   Loss (gain) on investments                      1,243     (1,255)
   Gain on disposal of property and equipment          -       (184)
   Changes in operating assets and liabilities:
    Accounts receivable                          (13,151)    (5,155)
    Inventories                                   (4,988)     1,111
    Prepaid expenses and other current assets    (16,588)    (1,070)
    Accounts payable and accrued liabilities      (2,158)    (2,452)
    Income taxes payable                          13,019      1,780
    Accrued restructuring costs                   (4,428)     2,193
    Deferred income                                1,483        432
                                                ---------  ---------
     Net cash (used in) provided by operating
 activities                                       (2,265)     7,167
                                                ---------  ---------

Cash flows from investing activities:
 Acquisition of businesses, net of cash
  acquired                                      (413,781)         -
 Purchases of short-term available-for-sale
  investments                                          -    (82,389)
 Proceeds from sales and maturities of short-
  term available-for-sale investments            181,450    141,084
 Purchases of long-term available-for-sale
  investments in bonds and notes                       -    (10,231)
 Proceeds from sales and maturities of long-term
  available-for-sale investments in bonds and
  notes                                                -     44,760
 Purchases of investments and other assets             -     (2,000)
 Proceeds from sale of investments and other
  assets                                           5,440        734
 Proceeds from refund of wafer fabrication
  deposits                                             -      1,634
 Purchases of property and equipment              (3,977)    (2,666)
 Proceeds from sale of property                        -      2,604
 Purchase of intangible assets                    (1,747)    (1,530)
                                                ---------  ---------
     Net cash (used in) provided by investing
      activities                                (232,615)    92,000
                                                ---------  ---------

Cash flows from financing activities:
Repurchase of convertible subordinated notes           -    (70,177)
Proceeds from issuance of common stock            20,793     12,715
                                                ---------  ---------
     Net cash provided by (used in) financing
      activities                                  20,793    (57,462)
                                                ---------  ---------

Net (decrease) increase in cash and cash
 equivalents                                    (214,087)    41,705
Cash and cash equivalents, beginning of the
 period                                          405,566    121,276
                                                ---------  ---------
Cash and cash equivalents, end of the period   $ 191,479  $ 162,981
                                                =========  =========


     CONTACT: PMC-Sierra, Inc.
              Alan Krock, 408-988-1204
              or
              David Climie, 408-988-8276
              or
              Susan Shaw, 408-988-8515