PMC SIERRA INC
10-K, 2000-03-20
SEMICONDUCTORS & RELATED DEVICES
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-K

            [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934
                  For the fiscal year ended: December 26, 1999

          [ ] 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)

           Delaware                                            94-2925073
(State or other jurisdiction                                (I.R.S. Employer
      of incorporation)                                    Identification No.)

                              105-8555 BAXTER PLACE
                       BURNABY, BRITISH COLUMBIA, V5A 4V7
                                     CANADA
          (Address of principal executive offices, including zip code)

       Registrant's telephone number, including area code: (604) 415-6000

        Securities registered pursuant to Section 12(b) of the Act: None

          Securities registered pursuant to Section 12(g) of the Act:
                         Common Stock, par value $0.001

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  shorter  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 _____

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of Registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

The  aggregate  market  value of the voting stock held by  nonaffiliates  of the
Registrant,  based upon the closing  sale price of the Common  Stock on February
15,  2000,  as  reported  by  the  Nasdaq  National  Market,  was  approximately
$15,831,000,000.  Shares of Common  Stock  held by each  executive  officer  and
director and by each person who owns 5% or more of the outstanding  voting stock
have been  excluded in that such  persons may be deemed to be  affiliates.  This
determination of affiliate status is not necessarily a conclusive  determination
for other purposes.

As of February 15, 2000, the Registrant had  139,210,849  shares of Common Stock
outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE

       Parts of the Proxy Statement  for Registrant's 2000 Annual Meeting
       of Stockholders  are incorporated by reference in Items 10, 11, 12
       and 13 Part III of this Form 10-K Report.

<PAGE>


PART I

ITEM 1.  Business.

GENERAL
- -------

In this Annual Report, "PMC-Sierra",  "PMC", "the Company", "us", "our" or "we",
includes PMC-Sierra, Inc. and all our subsidiary companies.

We issued one two-for-one stock dividend on May 14, 1999 and another on February
14,  2000.  The share  numbers  and prices  presented  in this  report have been
adjusted to reflect these events.

We design, develop, market and support high-performance semiconductor networking
solutions.  Our products are used in the high speed  transmission and networking
systems which are being used to restructure  the global  telecommunications  and
data communications infrastructure.

We provide components for equipment based on Asynchronous Transfer Mode ("ATM"),
Synchronized Optical Network ("SONET"),  Synchronized Digital Hierarchy ("SDH"),
T1/E1/J1 and T3/E3/J2 access transmission, High speed Data Link Control ("HDLC")
and Ethernet. Our networking products adhere to international  standards and are
sold on the merchant market to over 100 customers either directly or through our
worldwide distribution channels.


PMC-Sierra   was   incorporated   in  the  State  of   California  in  1983  and
reincorporated in the State of Delaware in 1997. Our principal  executive office
is located at 105-8555 Baxter Place,  Burnaby,  B.C., Canada V5A 4V7. Our Common
Stock  trades on the  Nasdaq  National  Market  under the  symbol  "PMCS" and is
included in the Nasdaq-100 index.



<PAGE>


GLOSSARY OF TERMS
- -----------------

We use a  number  of  terms  in this  report  which  are  familiar  to  industry
participants  but which some  investors  may not  recognize.  We have provided a
glossary of some of these terms below.

ATM: Asynchronous Transfer Mode - a high speed switching technology used in both
LAN and WAN  applications.  ATM packages  information  in a fixed size (53 byte)
cell format. ATM transmission rates can scale from 25 megabits per second (Mbps)
to 10 gigabits per second (Gbps).

Bandwidth: 1. The range of frequencies that can be utilized without interference
from an outside  transmission of data packets between modules.  2. The volume of
data  that  a  transmission  line  can  carry,  measured  in  bits  per  second.
Traditional copper lines have the lowest bandwidth potential,  while fiber optic
lines have the highest.

Constant Bit Rate (CBR): A type of traffic that requires a continuous,  specific
amount of bandwidth  over the ATM network.  This is typically  required for high
quality video and digital voice transmission.

Dense Wavelength  Division  Multiplexing  (DWDM): An extension of WDM technology
that allows  simultaneous  transmission  of more than four  channels on a single
fiber.

Digital Subscriber Line:  Point-to-point public network access technologies that
allow multiple forms of data,  voice, and video to be carried over  twisted-pair
copper  wire on the local  loop  between a network  service  provider's  central
office and the customer site at limited  distances.  Most DSL technologies don't
use the full  bandwidth  of the  twisted-pair,  leaving  enough room for a voice
channel.

Ethernet: A standard protocol used in the LAN that encompasses both layer 1 (the
transmission  and  reception  of bits) and layer 2 (the  packaging  of data into
frames)  functions.  Ethernet  supports data transfer rates of 10Mbps.  The Fast
Ethernet and Gigabit Ethernet  standards are compatible with previous  standards
generations  and  support  data  transfer  rates  of 100 Mbps  and  1,000  Mbps,
respectively.

Frame Relay: A  packet-switching  technology used to route frames of information
within a WAN.  Instead of leasing  dedicated  lines between all remote sites,  a
virtual  private network is established in which remote sites are connected to a
central carrier, which routes data accordingly.

Gigabit:  One billion bits.

HDLC:  High-level  Data  Link  Control  -  A  transmission   protocol  in  which
information  that  allows  devices to control  data flow and  correct  errors is
embedded in a data frame. Typically used for frame relay services.

Internet  Protocol (IP): A routing  protocol  standard that is used by Microsoft
Windows  95,  Windows  NT,  the UNIX  operating  system,  and the  Internet.  IP
implements the network layer (Layer 3) of the TCP/IP protocol,  which contains a
network  address  and is used to  route a  message  to a  different  network  or
subnetwork.
<PAGE>

LAN:  Local Area Network - A shared network of computers that spans a relatively
small area, usually confined to a single or close cluster of buildings.

MAN:  Metropolitan  Area  Network  - A  communications  network  that  covers  a
geographic  area,  such as a city or suburb.  A series of LANs at multiple sites
often interconnected by public facilities.

Megabit: One million bits.

Multiplexing:  An electronic or optical  process that combines a large number of
low-speed  transmission  lines into one  high-speed  line by splitting the total
available  bandwidth of the high-speed line into narrower bands (known as FDM or
frequency  division),  or by  allotting  a common  channel to several  different
transmitting  devices,  one at a  time  in  sequence  (known  as  TDM,  or  time
division).

Packet:  A group of binary  digits  switched as a whole.  Each  packet  contains
information,  a destination  code,  and a sequencing  code in order to place the
data in proper place in the sequence of packets  that  comprise a complete  data
transmission and codes used to check the transmission errors.

Point-of-Presence  (POP):  1. A geographic  area within  which a  communications
network allows local access.  2.  Locations  where a  long-distance  carrier has
installed  transmission  equipment  in a service  area that serves as, or relays
calls  to, a network  switching  center of that  long-distance  carrier.  3. The
physical site where an Internet  service provider (ISP) has its modems and other
networking gear. Subscribers dial into the POP for Internet access.

Quality of Service  (QoS):  The  ability to define a level of  performance  in a
system.  For example,  ATM networks specify modes of service that ensure optimum
performance for traffic,  such as real-time voice and video.  Voice  information
receives  priority over data  information  in order to ensure speech quality and
prevent delay.

Router:  Device that connects  multiple LANs or the bridge between a LAN and the
WAN.

SDH:  Synchronous Digital Hierarchy - An international  standard for synchronous
data transmission  over fiber; SDH was adapted from SONET,  which is employed in
North America.

SONET:  Synchronous Optical Network - Standard for synchronous data transmission
over fiber. Rates are measured in optical carrier (OC) units. For example,  OC-1
equals rates of 51.84 Mbps and OC-3 equals rates of 155 Mbps.
The international equivalent is SDH.

T1/E1/J1: T1 is a digital transmission link with a capacity of 1.544 Mbps. A T-1
line can  normally  accommodate  24  voice  conversations  (channels),  each one
digitized at 64 Kbps and one 8-Kpbs channel for signaling and control. E1 is the
European  designation  for T1 and has a capacity of  approximately 2 Mbps. J1 is
the Japanese designation for T1.
<PAGE>

T3/E3/J2:  A data communications line capable of transmission speeds of 45 Mbps.
A T-3 line can normally accommodate 672 voice conversations.  E3 is the European
designation for T3 and J2 is the Japanese designation for T3.

Terabit:  One trillion bits.

WANs:  Wide Area  Network - A shared  network  of  computers  that spans a large
geographical area, normally consisting of multiple LANs or MANs.


INDUSTRY BACKGROUND
- -------------------

People are finding new and more demanding ways to use the world's communications
networks.  At home,  we use the Internet to shop,  pay our bills or  communicate
with each other. At the work site, we conduct on-line  meetings,  read the news,
share  data  across  departments,  download  reports,  sell  products  and order
supplies.  These  are  just a few of  the  applications  for  which  we use  the
worldwide communications infrastructure.

The way we use the world's  networks  today is a relatively  recent  phenomenon.
Until  just a few years  ago,  the  world's  networks  were  primarily  used for
telephone calls and facsimile  transmissions.  Billions of dollars were spent by
traditional  phone  companies  to supply  reliable  networks  to  provide  these
services.  The Internet was just a dream resident at colleges and  universities.
Now the Internet has become much more broadly  adopted,  and the public  expects
the  networks of the world to supply the  capacity to support  large  volumes of
data traffic in addition to phone conversations.

The Bandwidth Suppliers

Two major  types of network  bandwidth  suppliers  are  trying to address  these
rapidly evolving networking demands:  traditional  telephone companies,  such as
AT&T, MCI Worldcom and Sprint, and new data-centric competitive carriers such as
Williams,  Level 3 and UUNET.  These bandwidth  suppliers have used a variety of
technologies to deliver their network  services.  Many of the traditional  phone
companies  prefer  "multi-service"  Frame Relay and  Asynchronous  Transfer Mode
(ATM)  networks  in order  to  leverage  their  existing  infrastructures  while
providing the Quality of Service (QoS) required to support data, voice and other
communication  traffic. The newer carriers are more data-centric,  and thus have
preferred more Internet Protocol (IP) packet based data networks.

Today, the newest network  deployments are focusing on transporting  data, voice
and  other  communication  signals  over a single  multi-service  network.  Many
carriers  are building  networks  that  converge  (IP) layers over ATM and Frame
Relay sub-networks or directly onto fiber.

Carriers  which own  multi-service  networks  enter into  agreements  with their
customers to guarantee bandwidth for data or voice transport or Internet access.
These  agreements can enable carriers to increase  revenues as the most critical
traffic requirements can be guaranteed at a higher price.
<PAGE>

Carriers  can  commit to  particular  service  levels  because  the QoS  traffic
management  techniques  made possible by protocols such as ATM have developed an
excellent capability for providing QoS standard guarantees. Protocols such as IP
have less developed,  but rapidly improving,  QoS  characteristics.  The current
lack of acceptable IP-related QoS standards has prohibited the implementation of
IP across the emerging global network.  Thus,  multi-service  networks are still
preferred by most of the traditional phone companies.

The Data Wave

Many carriers  believe the next  generation of  communications  networks will be
IP-based,  as their networks will transport far more data than any other type of
traffic. Eventually, carriers intend to incorporate the exemplary redundancy and
reliability  aspects of the voice network  infrastructure in new next-generation
packet  networks  because they recognize that voice and other traffic will still
need to be  transported.  Consumers  expect  their  telephones  to work from the
moment  they pick up the  receiver  and hear the "dial  tone" to the moment they
hang it up, and they do not expect to "re-boot"  their  phones.  In keeping with
this  performance  expectation,  the  builders of the  Internet  will attempt to
develop IP networks that offer the same dependability.

The Optical Transport Network

The emergence of the Optical  Transport Network (OTN) - a network based on glass
and light  transmission,  rather than  electrical  transmission  - is one of the
greatest  evolutions  in the  broadband  networking  arena.  Most of the current
Internet  infrastructure  is based on electrical  transmission over copper wire.
Many carriers consider the massive  bandwidth  capacity provided by fiber optics
and Dense Wave Division Multiplexing (DWDM), a method of using color wavelengths
to create a new network "line" for every color, a more attractive investment for
long distance transmissions.

In 1999 various carriers deployed  thousands of miles of glass fiber underground
and alongside railway lines or petroleum  pipelines.  These deployments  provide
communications  capacity  within or across  continents  (i.e. the  WAN).Emerging
lower cost DWDM systems are now being  deployed in  Metropolitan  Area  Networks
(MANs).

The emergence of the OTN has resulted in an optical/electrical convergence where
optical functions mesh with electrically managed functions. In today's networks,
optical wavelengths  transport signals and electrical  semiconductors manage the
higher layer  protocols,  such as IP routing or switching.  PMC offers  products
that merge  existing  electrical-based  communications  protocols,  such as ATM,
SONET/SDH,  Internet  Protocol (IP) and Gigabit Ethernet with new  optical-based
protocols.  In the future,  emerging  technologies such as optical switching and
routing protocols will become increasingly important.

The standards for this electrical-to-optical  interface have not been finalized.
The networking  industry's  Optical Domain  Service  Interconnect  industry-wide
consortium  has over 100 service  providers  and  networking  vendors  which are
attempting to develop a standards-based approach to convergence. While standards
are evolving,  small companies are offering the innovation,  time to market, and
new  technology  required to enable  carriers to the upgrade  rapidly from their
existing circuit-based networks to an optical multi-service network.

<PAGE>

Systems  suppliers for optical  networking  applications  require  semiconductor
products with greater levels of integration, increased density, and higher speed
capabilities.  These  high-speed  techniques  must handle  access rates from 1.5
megabits per second to core  Internet  backbone  rates of 10 gigabits per second
and beyond.  They must use little power,  so that larger  networks may be built,
and comply with telephone company signal quality standards.

Specific Trends

The  following  specific  trends are important to  PMC-Sierra's  internetworking
semiconductor businesses:

- -        A growing  number of Internet  Service  Providers are using  networking
     equipment  to  aggregate  networking  traffic  from 64  kilobit  per second
     streams  with 155 Mbps or more of traffic  that will be sent on fiber lines
     onto the MAN and WAN core backbones of the Internet.

- -        For Remote Access data and voice networks,  network users are upgrading
     their Frame Relay networks to aggregate  additional  dedicated line traffic
     (such as telephones) and differentiate  data traffic protocol types such as
     ATM,  Frame  Relay  and IP.  These  new  applications  are  referred  to as
     Any-Service-Any-Port (ASAP).

- -        ATM networks are being  created  which can scale from low-rate 1.5 Mbps
     to  Terabit  rates for data,  voice and video  traffic  which  require  QoS
     guarantees.  ATM networks  are being used  increasingly  in  switching  and
     transmission systems that seek to provide QoS to customers.

- -        The current Internet  infrastructure  is dominated by router entry into
     WAN backbone fiber  networks.  Sometimes users sending this traffic require
     maximum  bandwidth.  These  users  may  forego  QoS  and  other  management
     processing  overhead  to get more  bandwidth.  In these  cases,  mapping IP
     directly into SONET/SDH  frames is more  efficient  because it does not use
     bandwidth for  undesired  overhead.  IP-Over-SONET/SDH  (POS) is a protocol
     used in Ethernet  switches as an uplink to MAN/WAN  fiber  backbone  rings,
     high-speed Terabit routers and remote access concentrators.  It maps packet
     traffic directly into SONET/SDH lines and is being deployed by carriers for
     these users.

- -        For residential Internet  opportunities,  the current 56 kilobit analog
     modem is a bottleneck.  Emerging  Digital  Subscriber Line (DSL) technology
     uses the  traditional  phone  lines to your home or office to provide up to
     several Mbps of bandwidth for Internet access.  New DSL access  multiplexer
     equipment is making the broad  deployment  of DSLs  possible by providing a
     manner  with  which  to  manage  all of the  network  traffic  to and  from
     customers using DSL services.  Cable modems are also providing  residential
     customers with higher bandwidth access methods to the internet.

- -        Carriers are rapidly  deploying base transceiver  stations for wireless
     services.  These stations convert waves of radio frequency air traffic into
     wired networks.  The wired networks then aggregate,  switch and process the
     signals at primarily T1 or E1 rates.  HDLC and ATM protocols are often used
     to interface and process the aggregated T1 and E1 lines.

NETWORKING PRODUCTS
- -------------------

We provide  networking  semiconductor  devices and related technical service and
support  to  equipment   manufacturers  for  use  in  their  communications  and
networking equipment. Our objective is to develop networking semiconductors that
enable network systems  vendors to get to market quickly with high  performance,
cost effective and scalable systems.

Our product  offerings can be grouped into four general  areas:  ATM,  SONET/SDH
(including  POS),  Remote  Access and  Ethernet  switching.  These  products are
generally used in networking equipment as follows:


         Table I - Networking Equipment in which PMC's Products are Used
         ---------------------------------------------------------------

             Networking Equipment        ATM    SONET/SDH     ACCESS    ETHERNET

Wide Area Network (WAN)
  Remote Access Equipment
    Frame Relay Access Devices                                  X
    Access Multiplexers/DSLAMs*           X                     X
    Wireless Basestations                 X                     X
    Voice Switches                        X         X           X
    Digital Loop Carriers                 X                     X
    Frame Relay Switches                  X                     X
    Internet Access Concentrators         X                     X

  Transmission and Switching Equipment
    WAN Edge Switches                     X         X           X          X
    Routers                               X         X           X          X
    WAN Core Switches                     X         X           X
    Digital Cross - Connects              X         X           X
    Add-Drop Multiplexers                 X         X           X
    Terminal Multiplexers                 X         X           X

Local Area Network (LAN)
  Switches/Routers                        X                     X          X
  Network Interface Cards                 X

* DSLAM = Digital Subscriber Line Access Multiplexer



The following is a summary of some of our more  significant  products  currently
available.  The purpose of this table is only to provide a general understanding
of where our products  fit. Our chips may not perform all the possible  features
related to a specific  function.  For  example,  we have a number of single port
OC-3 ATM physical layer products which perform  different  functions  within the
physical layer of the  networking  hierarchy and are generally used in different
applications.


<PAGE>
<TABLE>
<CAPTION>


                      Table II - PMC-Sierra Product Summary
                      -------------------------------------

No.  Product                        Description                           Voltage          Clock Rates/Throughput Capacities
- ---  -------                        -----------                           -------      ------------------------------------------
<S>                                                                                    <C>  <C>  <C>  <C>  <C>  <C>   <C>   <C>
                                                                                       T1   E1   T3   E3   J2   OC3   OC12  >OC12
     ATM
   1 S/UNI-MPH        Quad T1/E1 ATM Interface                              5v          x   x
   2 S/UNI-PDH        T1/E1/T3/E3  + ATM                                    5v          x   x    x    x
   3 S/UNI-155        1-port PHY                                            5v                                   x
   4 S/UNI-155-LITE   1-port PHY + analog CRU/CSU                           5v                                   x
   5 S/UNI-PLUS       enhanced 1-port PHY + analog CRU/CSU                  5v                                   x
   6 S/UNI-155-DUAL   2-port PHY + analog CRU/CSU                           5v                                   x
   7 S/UNI-QUAD       4-port PHY + analog CRU/CSU                           3.3v                                 x
   8 S/UNI-155-ULTRA  1-port PHY + UTP-5 + analog CRU/CSU                   5v                                   x
   9 S/UNI 622        1-port PHY                                            5v                                   x     x
  10 S/UNI-622 MAX    1-port PHY + analog CRU/CSU                           3.3v                                       x
  11 RCMP-800         Routing Control, Monitoring & Policing                5v                                   x     x
  12 RCMP-200         Routing Control, Monitoring & Policing                5v                                   x
  13 S/UNI-ATLAS      Full Duplex RCMP + additional features                3.3v                                 x     x
  14 AAL1gatorII      AAL1 SAR                                              3.3v        x   x    x    x    x
  15 AAL1gator-4      AAL1 SAR - 4 channel                                  2.5v        x   x    x    x    x
  16 AAL1gator-8      AAL1 SAR - 8 channel                                  2.5v        x   x    x    x    x
  17 AAL1gator-32     AAL1 SAR - 32 channel                                 2.5v        x   x    x    x    x
  18 LASAR-155        ATM PHY & SAR                                         5v                                   x
  19 QRT              Quad Routing Table                                    3.3v        x   x    x    x    x     x     x
  20 QSE              Quad Switching Element                                3.3v        x   x    x    x    x     x     x

     SONET/SDH and POS
  21 TUPP             VT/TU Payload Alignor/Processor                       5v          x   x    x    x    x     x
  22 TUPP-PLUS        TUPP + Performance Monitor                            5v          x   x    x    x    x     x
  23 TUPP-PLUS 622    TUPP + Performance Monitor                            2.5v        x   x    x    x    x     x     x
  24 TUDX             VT/TU X-Connect Switch                                5v          x   x
  25 TEMAP            VT/TU Mapper and M13 Multiplexer                      3.3v        x   x    x    x
  26 STXC             Transport Overhead Terminator                         5v                                   x
  27 STTX             Transport Overhead Terminator                         5v                                         x
  28 SPECTRA-155      Payload Extractor/Aligner                             5v                                   x
  29 SPECTRA-622      Payload Extractor/Aligner                             3.3v                                       x
  30 SPTX             Path Terminating Tranceiver                           5v                                   x
  31 S/UNI TETRA      4-port ATM + POS PHY + analog CRU/CSU                 3.3v                                 x
  32 S/UNI-622-POS    1-port ATM + POS PHY + analog CRU/CSU                 3.3v                                       x

     Access
  33 T1XC             1-port framer + analog                                5v          x
  34 COMET            1-port framer + long haul analog                      3.3v        x   x
  35 E1XC             1-port framer + analog                                5v              x
  36 QDSX             4-port short haul analog LIU                          5v          x   x
  37 TQUAD            4-port framer                                         5v          x
  38 EQUAD            4-port framer                                         5v              x
  39 TOCTL            8-port framer                                         3.3v        x
  40 EOCTL            8-port framer                                         3.3v            x
  41 S/UNI JET        1-port framer or ATM UNI                              3.3v        x   x    x    x    x
  42 S/UNI QJET       4-port framer or ATM UNI                              3.3v        x   x    x    x    x
  43 D3MX             M13 Multiplexer/Demultiplexer                         5v          x        x
  44 TEMUX            28T/21E framer, Sonet mapper & M13 Mux                2.5/3.3     x   x    x    x             3     3
  45 FREEDM-8         8 link, 128 ch. HDLC Controller                       3.3v        x   x    x    x
  46 FREEDM-32        32 link, 128 ch. HDLC Controller                      3.3v        x   x    x    x
  47 FREEDM-32P672    32 link, 672 ch. HDLC Controller                      3.3v        x   x    x    x
  48 FREEDM-32A672    32 link, 672 ch. HDLC Controller w' "Any-PHY"         3.3v        x   x    x    x
  49 FREEDM-84P672    84 link, 672 ch. HDLC Controller                      3.3v        x   x    x    x          x
  50 FREEDM-84A672    84 link, 672 ch. HDLC Controller w' "Any-PHY"         3.3v        x   x    x    x          x
  51 S/UNI DUPLEX     Dual Serial Link PHY Multiplexer (DSLAM)              3.3v        x   x    x    x    x     x
  52 S/UNI VORTEX     Octal Serial Link PHY Multiplexer (DSLAM)             3.3v        x   x    x    x    x
  53 S/UNI APEX       ATM/Packet Traffic Mgr. & Switch                      3.3v        x   x    x    x    x     x     x

     Ethernet
  54 EXACT - PM3370   8x100 port controller                                 3.3v                                100m b/s
  55 EXACT - PM3380   1x1000 port controller                                3.3v                                             x
  56 EXACT - PM3390   8 to 16 port EXACT Switch Matrix                      3.3v                                             x


<PAGE>


No.      Product                        Description                                             Function
- ---      -------                        -----------                  --------------------------------------------------------------
                                                                     LIU/Framr SAR  Back-plane  Cell/Packet    Traffic     Switch
                                                                                                 Processor       Mgt
     ATM
   1 S/UNI-MPH        Quad T1/E1 ATM Interface                          x
   2 S/UNI-PDH        T1/E1/T3/E3  + ATM                                x
   3 S/UNI-155        1-port PHY                                        x
   4 S/UNI-155-LITE   1-port PHY + analog CRU/CSU                       x
   5 S/UNI-PLUS       enhanced 1-port PHY + analog CRU/CSU              x
   6 S/UNI-155-DUAL   2-port PHY + analog CRU/CSU                       x
   7 S/UNI-QUAD       4-port PHY + analog CRU/CSU                       x
   8 S/UNI-155-ULTRA  1-port PHY + UTP-5 + analog CRU/CSU               x
   9 S/UNI 622        1-port PHY                                        x
  10 S/UNI-622 MAX    1-port PHY + analog CRU/CSU                       x
  11 RCMP-800         Routing Control, Monitoring & Policing                                         x
  12 RCMP-200         Routing Control, Monitoring & Policing                                         x
  13 S/UNI-ATLAS      Full Duplex RCMP + additional features                                         x
  14 AAL1gatorII      AAL1 SAR                                                  x
  15 AAL1gator-4      AAL1 SAR - 4 channel                                      x
  16 AAL1gator-8      AAL1 SAR - 8 channel                                      x
  17 AAL1gator-32     AAL1 SAR - 32 channel                                     x
  18 LASAR-155        ATM PHY & SAR                                     x       x
  19 QRT              Quad Routing Table                                                             x             x
  20 QSE              Quad Switching Element                                                         x                        x

     SONET/SDH and POS
  21 TUPP             VT/TU Payload Alignor/Processor                                                x
  22 TUPP-PLUS        TUPP + Performance Monitor                                                     x
  23 TUPP-PLUS 622    TUPP + Performance Monitor                                                     x
  24 TUDX             VT/TU X-Connect Switch                                                                                  x
  25 TEMAP            VT/TU Mapper and M13 Multiplexer                  x
  26 STXC             Transport Overhead Terminator                     x
  27 STTX             Transport Overhead Terminator                     x
  28 SPECTRA-155      Payload Extractor/Aligner                         x
  29 SPECTRA-622      Payload Extractor/Aligner                         x
  30 SPTX             Path Terminating Tranceiver                       x
  31 S/UNI TETRA      4-port ATM + POS PHY + analog CRU/CSU             x
  32 S/UNI-622-POS    1-port ATM + POS PHY + analog CRU/CSU             x

     Access
  33 T1XC             1-port framer + analog                            x
  34 COMET            1-port framer + long haul analog                  x
  35 E1XC             1-port framer + analog                            x
  36 QDSX             4-port short haul analog LIU                      x
  37 TQUAD            4-port framer                                     x
  38 EQUAD            4-port framer                                     x
  39 TOCTL            8-port framer                                     x
  40 EOCTL            8-port framer                                     x
  41 S/UNI JET        1-port framer or ATM UNI                          x
  42 S/UNI QJET       4-port framer or ATM UNI                          x
  43 D3MX             M13 Multiplexer/Demultiplexer                     x
  44 TEMUX            28T/21E framer, Sonet mapper & M13 Mux            x
  45 FREEDM-8         8 link, 128 ch. HDLC Controller                                                x
  46 FREEDM-32        32 link, 128 ch. HDLC Controller                                               x
  47 FREEDM-32P672    32 link, 672 ch. HDLC Controller                                               x
  48 FREEDM-32A672    32 link, 672 ch. HDLC Controller w' "Any-PHY"                                  x
  49 FREEDM-84P672    84 link, 672 ch. HDLC Controller                                               x
  50 FREEDM-84A672    84 link, 672 ch. HDLC Controller w' "Any-PHY"                                  x
  51 S/UNI DUPLEX     Dual Serial Link PHY Multiplexer (DSLAM)          x                x                                    x
  52 S/UNI VORTEX     Octal Serial Link PHY Multiplexer (DSLAM)         x                x                                    x
  53 S/UNI APEX       ATM/Packet Traffic Mgr. & Switch                          x                    x                x       x

     Ethernet
  54 EXACT - PM3370   8x100 port controller                                                          x                        x
  55 EXACT - PM3380   1x1000 port controller                                                         x                        x
  56 EXACT - PM3390   8 to 16 port EXACT Switch Matrix                                               x                        x

</TABLE>




Industry  analysts have recognized us as the market leader in ATM physical layer
solutions.  We  offer  LAN,  Edge and WAN core ATM  switch  chip  sets.  Our ATM
physical  layer products come in a variety of packages and provide the interface
to copper or fiber cabling along with framing and mapping  functions.  The S/UNI
product line offers physical layer solutions in a range from 1.5 megabits to 622
megabits.

Our line of RCMP/ATLAS  ATM layer  processors  handle higher layer ATM protocols
such as policing,  operations and management,  fault and performance monitoring,
while our ATM Switch chips offer a routing table and switching  element solution
capable of running at up to 622 megabytes per second.
<PAGE>

In 1998, we added the S/UNI - ATLAS to our product portfolio.  This product is a
622 Mbit/s ATM Layer device which integrates traffic policing, fault management,
performance  monitoring,  address resolution and translation onto one chip. This
full duplex chip is intended for the broadband OC-3 and OC-12 interface required
for ATM edge, enterprise and core switches.

In 1999 we also  introduced  a chip set  consisting  of: The SPECTRA - 622,  the
TUPP+622  and the TEMAP.  These  SONET/SDH/T1/E1  products  provide the framing,
tributary  processing and mapping functions for fully  channelized  applications
such as multi-service add-drop multiplexers,  switches,  routers,  concentrators
and central  office  digital  cross-connects  for rates between DS-O (64 Kbit/s)
through to OC-12/STM4 (622 Mbit/s).

In  1999,  we  introduced  the  VORTEX  chipset,  an ATM or  packet-based  DSLAM
solution.  The  chipset  provides  traffic  management,  aggregation,  switching
maintenance  and  management  functions  for all DSL service  types.  The VORTEX
chipset is comprised of the S/UNI-Duplex line card multiplexer, the S/UNI-VORTEX
core card multiplexer and the S/UNI-APEX  traffic manager and switch. The VORTEX
chipset can be combined with the  S/UNI-ATLAS in DSLAM equipment used to provide
high speed consumer internet access,  as well as third generation  wireless base
stations, base station controllers and multi-service access equipment.

Our Remote Access products  include T1/E1 framers,  and high density Frame Relay
and HDLC controllers.  Our devices are used in data communications  applications
such as multi-service  and digital  subscriber line access  multiplexers,  frame
relay access  devices,  Internet  Protocol  routers,  wireless base stations and
remote   access   concentrators.   Our  access   products   are  also  used  for
telecommunications  applications such as private branch exchanges,  digital loop
carriers,  Class 5 switches,  digital  access cross  connect  systems,  add-drop
multiplexers and base transceiver stations.

In 1999, we introduced four new products representing the next generation of our
family of FREEDM high density  packet  processors.  The FREEDM 32P672 and FREEDM
32A672  support up to 672  simultaneous  HDLC channels  across up to 32 T1 or E1
links while the FREEDM 84P672 and FREEDM 84A672  support up to 672  simultaneous
HDLC channels across up to 84 T1 or E1 links. The "P" variety of FREEDM products
can be used in PCI-based remote access concentrators,  while the "A" variety can
be used in voice-over-IP gateways and frame relay interfaces.

In 1999,  we  introduced  the  TEMUX  chip to work  along  with  the new  FREEDM
products.   The  TEMUX  integrates  28  T1  framers,   21  E1  framers,  a  DS-3
framer/multiplexer  and SONET/SDH  mappers into a single chip. The  FREEDM/TEMUX
chip set provides a solution for  packet-based  T1/E1 over  channelized  DS-3 or
SONET/SDH  interfaces  used  in  Internet  access  switch,   router  and  access
multiplexer equipment.

Also in 1999, we introduced  the  S/UNI-JET,  a single channel J2, E3, T3 framer
with ATM cell  delineation.  The 3.3 volt  S/UNI-JET  is  designed  for  DSLAMs,
customer premise equipment routers, and access concentrators.
<PAGE>

NON-NETWORKING PRODUCTS
- -----------------------

In the third  quarter  of 1996,  we  announced  our  decision  to exit the modem
chipset business and discontinue development of our custom chipsets. We disposed
of all modem-related  inventories in 1997. Our remaining non-networking products
are still  being  sold but we are not  planning  new  development  or  follow-on
products.  Revenues from other non-networking  products declined rapidly in 1998
and 1999.

SALES, MARKETING AND DISTRIBUTION
- ---------------------------------

Our sales and marketing strategy is to be designed into our customers' equipment
by developing and selling  superior  products for which we will provide  premium
service and technical support. We maintain close working  relationships with our
customers  in order to make  products  that  address  their  needs.  We  provide
technical support to customers through field  application  engineers,  technical
marketing and factory systems engineers. We believe that providing comprehensive
product service and support is critical to shortening  customers'  design cycles
and maintaining a competitive position in the networking market.

We  sell  our   products   directly   and  through   distributors,   independent
manufacturers'  representatives and manufacturing  subcontractors.  Based on end
users and ignoring sales to distributors or sub-contractors, Lucent Technologies
and Cisco Systems each  represented  greater than 10% of our 1999  revenues.  In
1999, the country  purchasing the largest  percentage of our products outside of
the United States was Canada at 15%. Our  international  sales accounted for 31%
in 1999 , 32% in 1998 and 30% in 1997.

MANUFACTURING
- -------------

Independent  foundries and chip assemblers  manufacture all of our products.  We
receive  most of our  wafers  in  finished  form  from  Chartered  Semiconductor
Manufacturing  Ltd.  ("Chartered"),   and  Taiwan  Semiconductor   Manufacturing
Corporation  ("TSMC").   These  independent  foundries  produce  our  networking
products  at  feature  sizes  down to 0.25  micron.  We  believe  that by  using
independent foundries to fabricate our wafers, we are better able to concentrate
our resources on designing and testing new products.  In addition, we avoid much
of the capital cost associated with owning and operating a fabrication facility.

We have supply  agreements  with  Chartered  and TSMC.  We have made deposits to
secure access to wafer fabrication  capacity under both of these agreements.  At
December 31, 1999 and 1998,  we had $19.1 and $23.1  million,  respectively,  in
deposits with the foundries.  Under these agreements,  the foundries must supply
certain  quantities of wafers per year. Neither of these agreements have minimum
unit volume  requirements  but we are  obliged  under one of the  agreements  to
purchase a minimum  percentage of our total annual wafer  requirements  provided
that the foundry is able to continue to offer competitive  technology,  pricing,
quality and delivery.  The agreements may be terminated if either party does not
comply with the terms. We expect to spend $6.1 million in additional deposits to
secure  foundry  capacity  in 2000 and to  receive a refund of $4.6  million  of
existing deposits.

Wafers  supplied by outside  foundries  must meet our incoming  quality and test
standards.  We conduct the  majority of our test  operations  on advanced  mixed
signal and digital  test  equipment  in our Burnaby,  British  Columbia,  Canada
facility. The remainder of our testing is performed predominantly by independent
Asian companies.
<PAGE>

RESEARCH AND DEVELOPMENT
- ------------------------

Our  current  research  and  development  efforts are  targeted  at  integrating
multiple  channels  or  functions  on single  chips,  broadening  the  number of
products we provide to address varying protocols and networking  functions,  and
increasing the speeds at which our chips operate.

We  have  design  centers  in or near  Vancouver  (Canada),  Portland  (Oregon),
Gaithersburg  (Maryland),  San Jose  (California),  Galway  (Ireland),  Montreal
(Canada), Ottawa (Canada) and Saskatoon (Canada).

We spent $63.3 million in 1999, $35.9 million in 1998, and $22.9 million in 1997
on research and  development.  In 1998,  we also  expensed  $39.2  million of in
process  research  and  development,  $37.8  million  of  which  related  to the
acquisition of Integrated Telecom Technologies and $1.4 million of which related
to the acquisition of other technology.

BACKLOG
- -------

We sell primarily pursuant to standard short-term purchase orders. Our customers
frequently revise the quantity actually  purchased and the shipment schedules to
reflect changes in their needs. As of December 31, 1999, our backlog of products
scheduled for shipment within six months totaled $155.2 million.  As of December
31,  1998,  our backlog of products  scheduled  for  shipment  within six months
totaled $56.3  million.  Our  customers may cancel a significant  portion of the
backlog at their discretion  without penalty.  Accordingly,  we believe that our
backlog at any given time is not a meaningful indicator of future revenues.

COMPETITION
- -----------

The markets for our  products  are  intensely  competitive  and subject to rapid
technological  advancement  in design  tools,  wafer  manufacturing  techniques,
process  tools and  alternate  networking  technologies.  We must  identify  and
capture  future  market  opportunities  to offset the rapid price  erosion  that
characterizes  our  industry.  We may not be able to  develop  new  products  at
competitive pricing and performance levels. Even if we are able to do so, we may
not complete a new product and  introduce it to market in a timely  manner.  Our
customers  may  substitute  use of our products  with those of current or future
competitors.

We typically face  competition  at the design stage,  where  customers  evaluate
alternative design approaches that require integrated circuits.  Our competitors
have  increasingly  frequent  opportunities  to  supplant  our  products in next
generation  systems  because of shortened  product life and design-in  cycles in
many of our customers' products.

Major domestic and international  semiconductor  companies,  such as Intel, IBM,
and  Lucent  Technologies,  are  concentrating  an  increasing  amount  of their
substantially  greater  financial and other resources on the markets in which we
participate.  This  represents  a serious  competitive  threat to PMC.  Emerging
companies   also  provide   significant   competition  in  our  segment  of  the
semiconductor market.

Our competitors include Applied Micro Circuits Corporation,  Broadcom,  Conexant
Systems,  Cypress  Semiconductor,  Dallas  Semiconductor,   Galileo  Technology,
Integrated  Device  Technology,   IBM,  Infineon,  Intel,  Lucent  Technologies,
Motorola, MMC Networks, Texas Instruments, Transwitch and Vitesse Semiconductor.
Over the next few years,  we expect  additional  competitors,  some of which may
also have greater  financial and other  resources,  to enter the market with new
products.  In addition,  we are aware of venture-backed  companies that focus on
specific portions of our broad range of products. These companies,  individually
or collectively,  could represent  future  competition for many design wins, and
subsequent product sales.
<PAGE>

LICENSES, PATENTS AND TRADEMARKS
- --------------------------------

We have several U.S. patents and a number of pending patent  applications in the
U.S.  and  Europe.  In  addition to such  factors as  innovation,  technological
expertise and experienced personnel, we believe that a strong patent position is
becoming  increasingly  important to compete  effectively  in the  industry.  We
therefore have an active program to acquire additional patent protection.

We apply for mask work  protection  on our circuit  designs.  We also attempt to
protect our software,  trade secrets and other proprietary information by, among
other security measures,  entering into proprietary  information agreements with
employees.  Although we intend to protect our rights vigorously,  we do not know
if the measures we use will be successful.

PMC and its logo are our registered  trademarks and service marks.  We own other
trademarks  and service  marks not  appearing  in this Form 10-K Annual  Report.
Other  trademarks  used in this  Form  10-K  Annual  Report  are  owned by other
entities.

EMPLOYEES
- ---------

As of  December  31,  1999,  the  Company had 660  employees,  including  376 in
research  and  development,  100 in  production  and quality  assurance,  110 in
marketing and sales and 74 in administration.  Our employees are not represented
by a  collective  bargaining  agreement.  We have  never  experienced  any  work
stoppage. We believe our employee relations are good.


ITEM 2.  Properties.

Our executive offices and much of our test, sales and marketing,  and design and
engineering  operations  are  located in an  approximately  256,000  square foot
leased facility in Burnaby,  British Columbia,  Canada.  This facility is leased
through  May  2006.   The  Company   also  leases   offices  for  its  staff  in
Massachusetts,  North Carolina, Illinois, Texas, Maryland,  California,  Ontario
(Canada), Quebec (Canada),  Saskatchewan (Canada),  Barbados,  Ireland, Germany,
Sweden, Taiwan, the Peoples' Republic of China and the United Kingdom.

We lease  approximately  3,500, 17,000 and 84,000 square feet of office space in
three locations in or near San Jose. The leases expire in May 2002, May 2004 and
September 2010,  respectively.  We also lease 16,000 square feet of office space
in Maryland and 42,000 square feet of office space in Oregon.  These  facilities
are leased through to June 2005 and March 2009, respectively.


ITEM 3. Legal Proceedings.

Not applicable.


ITEM 4. Submission of Matters to a Vote of Security Holders.

Not applicable.





<PAGE>


                                     PART II

ITEM 5.  Market for Registrant's Common Equity and Related Stockholder Matters.

Stock Price  Information.  Our common stock trades on the Nasdaq National Market
under  the  symbol  PMCS.  The  following  table  sets  forth,  for the  periods
indicated, the high and low closing sale prices for our Common Stock as reported
by the Nasdaq National Market:

1998                                                            High       Low
                                                                ----       ---

First Quarter.............................................     $ 9.77     $ 6.50
Second Quarter............................................      12.82       9.25
Third Quarter.............................................      11.94       6.66
Fourth Quarter............................................      16.41       5.72

1999                                                            High        Low
                                                                ----        ---

First Quarter.............................................     $20.50     $15.82
Second Quarter............................................      31.03      17.82
Third Quarter.............................................      55.00      32.21
Fourth Quarter............................................      80.16      40.00


We issued a two-for-one  stock  dividend on May 14, 1999 and another on February
14, 2000. Accordingly,  the prices presented above have been adjusted to reflect
these events.

To maintain  consistency,  the  information  provided above is based on calendar
quarters  rather  than fiscal  quarters.  As of February  15,  2000,  there were
approximately 856 holders of record of the Company's Common Stock.

The  Company  has never paid cash  dividends  on its Common  Stock.  The Company
currently  intends to retain earnings,  if any, for use in its business and does
not  anticipate  paying  any  cash  dividends  in the  foreseeable  future.  The
Company's current bank credit agreement  prohibits the payment of cash dividends
without the approval of the bank.



<PAGE>
ITEM 6.  Selected Financial Data.
Summary Consolidated Financial Data *
(in thousands, except for per share data)

<TABLE>
<CAPTION>
                                                                               Year Ended December 31,(1)
                                                         ------------------------------------------------------------------------

STATEMENT OF OPERATIONS DATA:                                1999 (2)       1998 (3)       1997 (4)      1996 (5)       1995 (6)

<S>                                                        <C>            <C>            <C>           <C>            <C>
Net revenues                                               $  262,477     $  161,812     $  127,166    $  188,371     $  188,724
Gross profit                                                  207,114        123,592         94,101        93,423         91,614
Research and development                                       63,333         35,891         22,880        29,350         23,428
In process research and development                                 -         39,176              -         7,783              -
Impairment of intangibles assets                                    -          4,311              -             -              -
Marketing, general and administrative                          45,324         30,161         23,666        30,691         30,051
Costs of merger                                                   866              -              -             -              -
Purchase price adjustment - compensation                            -              -              -             -         10,624
Restructuring and other charges                                     -              -         (1,383)       64,670              -
Income (loss) from operations                                  97,591         14,053         48,938       (39,071)        27,511
Gain on sale of investments                                    26,800
Income (loss) from continuing operations                       90,020         (5,945)        34,184       (48,150)        23,976
Loss from discontinued operations                                   -              -              -             -        (22,497)

Net income (loss)                                          $   90,020     $   (5,945)    $   34,184    $  (48,150)    $    1,479


Net income (loss) per share - basic: (7)
 from continuing operations                                $     0.66     $    (0.05)    $     0.27     $   (0.41)    $     0.22
 from discontinued operations                                       -              -              -             -          (0.21)
                                                         -------------  -------------  ------------- -------------  -------------
  Net income (loss)                                        $     0.66     $    (0.05)    $     0.27     $   (0.41)    $     0.01
                                                         =============  =============  ============= =============  =============

Net income (loss) per share - diluted: (7)
 from continuing operations                                $     0.60     $    (0.05)    $     0.26     $   (0.41)    $     0.21
 from discontinued operations                                       -              -              -             -          (0.20)
                                                         =============  =============  ============= =============  =============
  Net income (loss)                                        $     0.60     $    (0.05)    $     0.26     $   (0.41)    $     0.01
                                                         =============  =============  ============= =============  =============


Shares used in per-share calculation - basic                  137,428        130,760        124,756       118,876        108,072
Shares used in per-share calculation - diluted                151,134        130,760        131,122       118,876        114,480

                                                                                 As of December 31, (1)
                                                         ------------------------------------------------------------------------

BALANCE SHEET DATA:                                          1999           1998           1997          1996           1995

Cash, cash equivalents and short-term investments          $  190,727      $  89,400      $  69,293     $  42,062      $  45,937
Working capital                                               165,247         73,612         58,744        20,438         32,741
Total assets                                                  341,970        204,496        149,577       129,914        184,860
Long term debt (including current portion)                      2,428         11,005         13,794        24,637         12,718
Stockholders' equity                                          235,686        130,675         90,714        48,444         81,000


<FN>

*    All financial  information has been restated to reflect the  acquisition of Abrizio Inc. in August 1999,  which was accounted
     for as a pooling of interests.

(1)  The  Company's  fiscal year ends on the last Sunday of the calendar  year.  The reference to December 31 has been used as the
     fiscal year end for ease of presentation.

(2)  Results for the year ended December 31, 1999 includes gains of $26.8 million and the related tax provision of $3.6 million on
     sale of investments and a $0.9 million charge for costs of merger for the acquisition of Abrizio Inc.

(3)  Results for the year ended  December 31, 1998 include an in process  research and  development  charge of $39.2 million and a
     charge for impairment of intangible assets of $4.3 million.

(4)  Results for the year ended  December 31, 1997  include a recovery of $1.4  million  from the  reversal of the excess  accrued
     restructure charge resulting from the conclusion of the restructuring.

(5)  Results for the year ended December 31, 1996 include a  restructuring  charge of $69.4 million related to Company's exit from
     the modem chipset business and the associated restructuring of its non-networking  operations,  and a $7.8 million in process
     research and development charge.

(6)  Results for the year ended December 31, 1995 include a $10.6 million purchase price  adjustment  relating to the finalization
     of the acquisition of the Company's Canadian networking product operations.

(7)  Reflects 2-for-1 stock splits effective February 2000, April 1999 and October 1995.

</FN>
</TABLE>
<PAGE>

Quarterly Comparisons

The following  tables set forth the  consolidated  statements of operations  for
each of the  Company's  last  eight  quarters.  This  quarterly  information  is
unaudited  and has been  prepared  on the same basis as the annual  consolidated
financial  statements.  In  management's  opinion,  this  quarterly  information
reflects  all  adjustments,  consisting  only of normal  recurring  adjustments,
necessary for a fair presentation of the information for the periods  presented.
The operating results for any quarter are not necessarily  indicative of results
for any future period.

                          Quarterly Data (Unaudited) *
                      (in thousands, except per share data)

<TABLE>
<CAPTION>
                                                     Year Ended December 31, 1999               Year Ended December 31, 1998
                                               -----------------------------------------  ------------------------------------------
                                                Fourth    Third (1) Second (2)  First      Fourth    Third (3) Second (4)   First
STATEMENT OF OPERATIONS DATA:
<S>                                             <C>       <C>        <C>       <C>         <C>       <C>        <C>        <C>
Net revenues                                    $ 80,600  $ 71,601   $ 59,887  $ 50,389    $ 45,437  $ 42,105   $ 39,975   $ 34,295
Gross profit                                      64,069    56,831     46,799    39,415      35,355    32,070     30,007     26,160
Research and development                          19,228    16,863     14,706    12,536      11,864    10,085      7,919      6,023
In process research and development                    -         -          -         -           -         -     39,176          -
Marketing, general and administrative             13,208    11,251     10,733    10,132       8,210     8,144      7,627      6,180
Costs of merger                                        -       866          -         -           -         -          -          -
Impairment of intangible assets                        -         -          -         -           -     4,311          -          -
Income (loss) from operations                     31,633    27,851     21,360    16,747      15,281     9,530    (24,715)    13,957
Gain on sale of investments                            -         -     26,800         -           -         -          -          -
Net income (loss)                               $ 22,532  $ 19,443   $ 36,969  $ 11,076    $  9,697  $  4,529   $(29,650)  $  9,479


Net income (loss) per share - basic (5)         $   0.16  $   0.14   $   0.27  $   0.08    $   0.07  $   0.03   $  (0.23)  $   0.07
Shares used in per-share calculation - basic     140,726   139,828    134,978   134,182     132,800   131,686    129,932    128,626

Net income (loss) per share - diluted (5)       $   0.14  $   0.13   $   0.25  $   0.08    $   0.07  $   0.03   $  (0.23)  $   0.07
Shares used in per-share calculation - diluted   157,020   154,648    147,524   145,342     142,464   140,488    129,932    136,710

<FN>

*    All financial  information has been restated to reflect the  acquisition of Abrizio Inc. in August 1999,  which was accounted
     for as a pooling of interests.

(1)  Income  (loss) from  operations  and net income  includes a $0.9 million  charge for costs of merger for the  acquisition  of
     Abrizio Inc.

(2)  Income  (loss) from  operations  includes  gains of $26.8  million and the related tax  provision  of $3.6 million on sale of
     investments.

(3)  Income (loss) from  operations and net income  includes a $4.3 million charge for impairment of intangible
     assets.

(4)  Income (loss) from operations and net income includes a $39.2 million charge for in process research and development.

(5)  Reflects 2-for-1 stock splits effective February 2000 and April 1999.

</FN>
</TABLE>
<PAGE>


ITEM 7. Management's  Discussion and Analysis of Financial Condition and Results
of Operations.

Some statements in this report constitute  "forward looking  statements"  within
the meaning of the federal securities laws,  including those statements relating
to:

- -    revenues;
- -    gross margins;
- -    gross profit;
- -    research and development  expenses  marketing,  general and  administrative
     expenditures; and
- -    capital resources sufficiency.

Our  results  may  differ  materially  from  those  expressed  or implied by the
forward-looking  statements for a number of reasons,  including  those described
below in "Factors You Should  Consider  Before  Investing in PMC-Sierra." We may
not, nor are we obliged to, release revisions to  forward-looking  statements to
reflect subsequent events.

We issued a two-for-one  stock  dividend on May 14, 1999 and another on February
14, 2000.  Share numbers and prices in this report have been adjusted to reflect
these events.

General. We design, develop, market and support  high-performance  semiconductor
solutions for advanced  telecommunications  and data  communications  networking
markets.  Our products are used in the broadband  communications  infrastructure
and high bandwidth networks. We supply ATM, SONET/SDH, T1/E1, T3/E3 and ethernet
semiconductors.

In January  and March  2000,  we  announced  acquisitions  of Toucan  Technology
Limited,  AANetcom Inc. and Extreme Packet  Devices  ("Extreme") in exchange for
approximately  7 million  shares of Common Stock and options to purchase  Common
Stock. This includes an estimated 1.9 million shares of Common Stock and Options
for the  purchase  Extreme.  The exact number of shares will vary along with the
market price of our Common Stock until the Extreme transaction closes. We expect
to account for these transactions using the pooling-of-interests method.

In September 1999, we acquired Abrizio,  Inc., a fabless  semiconductor  company
that  specializes  in broadband  switch chip fabrics used in core ATM  switches,
digital  cross-connects,  and terabit routers. We issued approximately 8,704,000
shares of Common  Stock and stock  options  in  exchange  for all of the  equity
securities of Abrizio.

The  transaction  was accounted for as a pooling of interests  under  Accounting
Principles  Board  Opinion No. 16.  Accordingly,  all prior period  consolidated
financial  statements  presented  have been  restated  to include the results of
operations, financial position and cash flows of Abrizio as though it had always
been a part of PMC.

In the second  quarter  of 1998,  we  expanded  our  portfolio  of ATM layer and
switching products by acquiring  Integrated Telecom Technology Inc. ("IGT"). IGT
was a fabless semiconductor company headquartered in Gaithersburg,  MD. IGT also
had a development site in San Jose, CA. IGT made ATM switching chipsets for wide
area network applications as well as ATM  Segmentation-and-Reassembly  and other
telecommunication chips.
<PAGE>

We paid $55.0  million in total  consideration  to  acquire  IGT.  We paid $17.8
million cash to IGT shareholders,  $9.0 million cash to IGT creditors and issued
approximately  2,516,000  shares of Common Stock and options to purchase  Common
Stock. The purchase price also included  $850,000 in professional fees and other
direct acquisition costs (see note 2 of the Consolidated Financial Statements).

The IGT acquisition was accounted for as a purchase.  The amount allocated to in
process research and development  ("IPR&D") of $37.7 million was expensed on the
acquisition  date.  Our  valuation  employed  the  SEC's  guidelines   regarding
acceptable   methodologies  for  valuing  IPR&D.  We  considered  the  stage  of
completion  of  individual  projects and the risk  associated  with the stage of
completion of the technology.

During the third quarter of 1998, we determined that a portion of the intangible
assets  recognized in connection with the IGT acquisition was impaired as we had
terminated  development  work  on  a  project.  We  recorded  an  impairment  of
intangible  assets of $4.3 million  because we determined that the developed and
core technology related to this project was not technologically feasible and had
no alternative future use.


Results of Operations

Net Revenues ($000,000)
- -----------------------

                                 1999     Change     1998      Change     1997
- --------------------------------------------------------------------------------

Networking products             $245.2      76%     $139.5       63%     $ 85.5
Non-networking - other          $ 17.3     (22%)    $ 22.3      (38%)    $ 35.8
Non-networking - modem               -                   -     (100%)    $  5.9
- --------------------------------------------------------------------------------
Total net revenues              $262.5      62%     $161.8       27%     $127.2
                             ===================================================


Net  revenues  increased  62% in  1999 as the  growth  in  volume  of  sales  of
networking  products  exceeded  the  decline  in  revenues  from  non-networking
products.

Networking  revenues grew 76% in 1999 and 63% in 1998.  Our growth was driven by
growth  in our  customers'  networking  equipment  business  and our  customers'
continued  transition  from designs  based on custom  semiconductors  to designs
based on standard semiconductors.

Non-networking  - other revenues,  which include custom and other  semiconductor
revenues,  declined  22%  from  1998 to 1999 and 38%  from  1997 to  1998.  This
reflects our strategic decision to restructure our other non-networking business
and  to  focus  on  networking   semiconductor   business.   We  are  supporting
non-networking  products  for existing  customers,  but have not  developed  any
further products of this type since 1996.

Consistent with our 1996 restructuring, we exited the modem chipset business and
sold all our modem chipset  inventories in 1997. No future revenues are expected
from that business.


Gross Profit ($000,000)
- -----------------------

                                           1999   Change   1998   Change   1997
- --------------------------------------------------------------------------------

Networking products                      $199.2    76%   $113.1    63%    $69.5
  Percentage of networking revenues         81%             81%             81%

Non-networking products                    $7.9   (25%)   $10.5   (57%)   $24.6
  Percentage of non-networking revenues     46%             47%             69%

Total gross profit                       $207.1    68%   $123.6    31%    $94.1
  Percentage of net revenues                79%             76%             74%

Total gross profit  increased 68% from 1998 to 1999 and 31% from 1997 to 1998 as
increased gross profit from higher sales volumes of networking products offset a
decline in gross profit due to lower  revenues  and margins from  non-networking
products.

Networking  gross profit in 1999,  as a percentage of revenues,  was  consistent
with 1998 and 1997.  Lower  wafer  costs,  higher  wafer  yields and new product
production  ramps  offset  reductions  in  average  selling  prices for sales of
existing products.

The gross margins of these  products were high relative to overall gross margins
in the semiconductor  industry because our chips are highly complex and are sold
in relatively low volumes.  In 1999, each of our networking  products  accounted
for less than 10% of total  networking  revenue.  We believe that, as the market
for our  networking  products grows and customers  purchase in greater  volumes,
gross profit as a percentage of revenues will decline.

Non-networking gross profit decreased by 25% from 1998 to 1999 and 57% from 1997
to 1998. Our  non-networking  gross profit  continues to decline  because of the
lack of new products.


<PAGE>



Other Costs and Expenses ($000,000)
- -----------------------------------


                                        1999    Change    1998    Change   1997
- --------------------------------------------------------------------------------

Research and development                $63.3     76%     $35.9     57%   $22.9
  Percentage of net revenues              24%               22%             18%

Marketing, general & administrative     $44.1     51%     $29.2     25%   $23.4
  Percentage of net revenues              17%               18%             18%

Amortization of goodwill                $ 1.3     37%     $ 0.9    205%   $ 0.3
  Percentage of net revenues               0%                1%              0%

Costs of merger                         $ 0.9       -         -       -       -
  Percentage of net revenues               0%                 -               -

In process research & development           -       -     $39.2       -       -
  Percentage of net revenues                                24%               -

Impairment of intangible assets             -       -     $ 4.3       -       -
  Percentage of net revenues                -                3%               -

Restructuring and other costs               -       -         -       -   $(1.4)
  Percentage of net revenues                -                 -             (1%)


Research and Development and Marketing, General and Administrative Expenses. Our
research and development ("R&D") expenses increased both in absolute dollars and
as a percentage of net revenues in 1999 and in 1998. R&D expenditures  increased
in 1999 and 1998 because we hired more  employees,  expanded R&D  subcontracting
and acquired Abrizio Inc. and IGT. Substantially all R&D activity carried out in
1999, 1998 and 1997 related to networking products.

We incur R&D  expenditures  in order to attain  technological  leadership from a
multi-year  perspective.  This has caused R&D spending to fluctuate from quarter
to  quarter.  We expect  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 the future,  we
expect R&D expenses to increase and relate entirely to networking products.

From 1998 to 1999 and from 1997 to 1998, we increased total  marketing,  general
and  administrative  expenses  by 51% and 25%  respectively.  From 1998 to 1999,
these  expenses as a  percentage  of total net  revenues  declined  because many
marketing,  general  and  administrative  expenses  are fixed in the short term.
Therefore,  during  periods  of rising  revenues,  these  expenses  decline as a
percentage of revenues. We expect marketing, general and administrative costs to
increase in absolute dollars during 2000.

Amortization of Goodwill.  Goodwill amortization increased from 1998 to 1999 and
from  1997 to 1998 as we  amortized  the  goodwill  recorded  as a result of the
acquisition of IGT. Our strategic plan anticipates acquiring companies or assets
in 2000.  The  purchase  method of  accounting  may be used to account for these
acquisitions.  This could result in significant goodwill amortization charges in
future period which could materially impact our operating results.
<PAGE>

Costs of Merger. We incurred  approximately  $900,000 in merger costs related to
the 1999  acquisition of Abrizio.  We expect to incur  significant  merger costs
related to future acquisitions.

In Process Research and Development ("IPR&D"). No IPR&D charges were incurred in
1999. Our operating earnings could be materially impacted from significant IPR&D
charges if we acquire companies or assets in 2000 and use the purchase method of
accounting.

In 1998, we recorded  IPR&D  expenses of $39.2  million.  These charges  include
$37.8 million  related to the acquisition of IGT and $1.4 million related to the
acquisition of technology  which had not reached  technological  feasibility and
had no alternative future use.

In our allocation of the IGT acquisition  purchase price to IPR&D, we considered
the following for each in process project at the time of the acquisition:

     (1)   the  present  value of  forecasted  cash flows and  income  that were
           expected to result from the projects;

     (2)   the status of projects;

     (3)   completion costs;

     (4)   project risks;

     (5)   the value of core technology; and

     (6)   the stage of completion of the individual project.

In valuing the core technology, we ensured that the relative allocations to core
technology and IPR&D were consistent with the relative contributions of each. In
the determination of the value of IPR&D, we ensured that the value of IPR&D only
considered efforts completed as of the date IGT was acquired.

The amount allocated to IPR&D of $37.8 million was expensed upon acquisition, as
it was  determined  that the underlying  projects had not reached  technological
feasibility,  had no  alternative  future  use and  successful  development  was
uncertain.

As of the acquisition  date, IGT had three development  projects in process.  In
order to develop these projects into  commercially  viable  products,  we had to
complete all planning,  designing and testing activities  necessary to establish
that the products could be produced to meet their design requirements.

The  calculations  of value  assigned to the IPR&D  reflected the efforts of IGT
prior to the close of the  acquisition.  The  estimated  completion  percentage,
estimated  technology  life  and  projected   introduction  date  of  the  three
development projects as of the acquisition date were as follows:

<PAGE>

                         Percent           Technology          Introduction
    Project             Completed             Life                 Date
    -------             ---------             ----                 ----

Project A                    78%              5 years               1999
Project B                    83%              5 years               1999
Project C                    65%              6 years               1998

Project A related to the development of an ATM switching system.  Projects B and
C related to the segmentation and reassembly ("SAR") of data in an ATM network.

We completed  project A in the first quarter of 1999 and were in full production
by the end of the year.  We  completed  development  of  Project B in the fourth
quarter of 1998 and were in full  production in the first quarter of 1999.  This
was consistent with our initial estimates used in the valuation of the projects.
We  terminated  development  on Project C during the third  quarter of 1998 (see
`Impairment of Intangible Assets').

Research and development  efforts  related to Project A and B are  substantially
complete  and  actual  results  to date have been  consistent,  in all  material
respects, with our assumptions at the time of the acquisitions.  The assumptions
primarily  consist of an expected  completion date for the in-process  projects,
estimated  costs to complete the projects,  and revenue and expense  projections
once the products have entered the market.  Products  related to Project A and B
from the IGT acquisition  have been introduced to the market in the last nine to
twelve months.  Shipment volumes of products from acquired  technologies are not
material to our overall position at the present time. Therefore, it is difficult
to determine the accuracy of overall revenue projections early in the technology
or product life cycle.  Failure to achieve the  expected  levels of revenues and
net income from these products will  negatively  impact the return on investment
expected at the time that the acquisition  was completed and potentially  result
in impairment of any other assets related to the development activities.

Impairment of Intangible Assets.  During the third quarter of 1998, we abandoned
a development  project.  We determined  that a portion of the intangible  assets
recognized in connection with the IGT acquisition was impaired.

The    terminated    project    related    to   ongoing    development    of   a
Segmentation-and-Reassembly  chip used to convert data packets to ATM data cells
(refer to Project C in "In Process  Research and  Development"  above).  The few
customers who were using a predecessor  chip were notified of the termination of
all future development of this technology.
The technology was specialized and has no alternative future use.

Interest and Other Income, Net ($000,000)
- -----------------------------------------


                                    1999     Change     1998     Change    1997
- --------------------------------------------------------------------------------

Interest and other income, net      $7.2      148%      $2.9      190%     $1.0
  Percentage of net revenues          3%                  2%                 1%


Interest and Other Income,  net. Higher cash balances available to earn interest
caused interest income to increase in 1999, 1998 and 1997. In addition,  in 1999
we included approximately $792,000 of income which came as a result of an equity
interest in another company.  Interest expense decreased in 1999 and 1998 due to
lower capital leases. This reduction was partially offset by additional interest
expense from debt assumed from Abrizio and leases assumed from IGT.
<PAGE>

Provision  for Income Taxes.  Our 1999 and 1998 income tax  provision  primarily
reflects the  provision for income taxes for our Canadian  subsidiary.  Our U.S.
taxes for 1999 and 1998 were largely  eliminated by tax losses realized from our
1996  restructuring  charge.  The $39.2 million charge for IPR&D and the related
$4.3 million  impairment of intangible  assets taken in 1998 are  non-deductible
and will not result in any future tax benefits.

Recently issued accounting standards. In June 1998, the FASB issued Statement of
Accounting Standards No. 133, Accounting for Derivative  Instruments and Hedging
Activities.  We expect to adopt the new Statement effective January 1, 2001. The
Statement will require the  recognition of all  derivatives on our  consolidated
balance sheet at fair value.  We anticipate  that the adoption of this Statement
will not  have a  significant  effect  on our  operating  results  or  financial
position.

Liquidity  and  Capital  Resources.  Cash and cash  equivalents  and  short-term
investments increased from $89.4 million at the end of 1998 to $190.7 million at
the end of 1999. During 1999,  operating  activities  provided $106.2 million in
cash. The net income of $90.0 million in 1999 includes non-cash charges of $17.6
million for depreciation, $5.9 million for amortization and a non-cash credit of
$26.8 million for gains from the sale of certain investments.

During 1999, we spent $9.1 million on investments and $30.7 million on new plant
and  equipment.  We also used cash to increase  short-term  investments by $55.7
million and to reduce our debt and capital lease obligations by $8.6 million. We
received $4.0 million in a wafer fabrication deposit refund,  $28.6 million from
our sale of an investment and $11.3 million by issuing Common Stock, principally
under our stock option and purchase plans.

Our  principal  source of  liquidity  at December  26,  1999 was our cash,  cash
equivalents and short-term investments of $190.7 million. We also have a line of
credit with a bank that allows us to borrow up to $15  million  provided,  along
with other restrictions,  that we do not pay cash dividends or make any material
divestments without the bank's written consent.

We  have  supply   agreements  with  two   independent   foundries  that  supply
substantially  all of the  wafers for our  products.  We have made  deposits  to
secure access to wafer fabrication  capacity under both of these agreements.  At
December 31, 1999 and 1998,  we had $19.1 and $23.1  million,  respectively,  in
deposits with the foundries.  Under these agreements,  the foundries must supply
certain  quantities of wafers per year. Neither of these agreements have minimum
unit volume  requirements  but we are  obliged  under one of the  agreements  to
purchase a minimum  percentage of our total annual wafer  requirements  provided
that the foundry is able to continue to offer competitive  technology,  pricing,
quality and delivery.  The agreements may be terminated if either party does not
comply with the terms. We expect to spend $6.1 million in additional deposits to
secure  foundry  capacity  in 2000 and to  receive a refund of $4.6  million  of
existing deposits.

We  purchased  $39.1  million in goods from our  foundry  suppliers  during 1999
compared to $22.4  million in 1998.  Those  amounts may not be indicative of any
future period since wafer prices and our volume requirements may change.

In each  year,  we are  entitled  to  receive  a refund  of a  portion  of these
deposits.  The amount to be received is based on the annual purchases from those
foundries  compared  to the  target  levels  in the  agreements.  Based  on 1999
purchases,  we received a $4.0 million  refund from one of the  foundries in the
first quarter of 2000. If we do not receive our deposits back during the term of
the agreements, then they will be returned to us at the end of the term.
<PAGE>

We  believe  that  existing  sources of  liquidity  and  anticipated  funds from
operations will satisfy our projected  working  capital and capital  expenditure
requirements  through the end of 2000. We expect to purchase or arrange  capital
leases for approximately $55.0 million of new capital  expenditures during 2000.
In 1999, actual capital expenditures totaled $30.7 million.


FACTORS THAT YOU SHOULD CONSIDER BEFORE INVESTING IN PMC-SIERRA
- ---------------------------------------------------------------

Our  company is  subject  to a number of risks - some are normal to the  fabless
networking  semiconductor  industry,  some  are the  same or  similar  to  those
disclosed in previous SEC  filings,  and some may be present in the future.  You
should carefully  consider all of these risks and the other  information in this
report  before  investing in PMC. The fact that certain risks are endemic to the
industry does not lessen the significance of the risk.

As a result of these  risks,  our  business,  financial  condition  or operating
results could be  materially  adversely  affected.  This could cause the trading
price of our  common  stock  to  decline,  and you may lose  part or all of your
investment.

If one or more of our customers changes their ordering pattern or if we lose one
or more of our customers, our revenues could decline

We depend on a limited  number of customers for a major portion of our revenues.
Through direct, distributor and subcontractor purchases, Lucent Technologies and
Cisco Systems each accounted for more than 10% of our fiscal 1999  revenues.  We
do not  have  long-term  volume  purchase  commitments  from  any  of our  major
customers.

Our  customers  often shift  buying  patterns as they manage  inventory  levels,
decide to use competing  products,  are acquired or divested,  market  different
products,  change production schedules or change their orders for other reasons.
If one or more  customers were to delay,  reduce or cancel  orders,  our overall
order  levels may  fluctuate  greatly,  particularly  when viewed on a quarterly
basis.

If our customers use our competitors' products instead of ours, suffer a decline
in demand for their products or are acquired or sold, our revenues may decline

Our expenses are relatively  fixed so that fluctuation in our revenues may cause
our  operating  results to fluctuate as well.  Demand for our products and, as a
result our revenues, may decline for the following reasons outside our control.

         As our  customers increase  the frequency  by  which  they design  next
         generation  systems  and  select the chips for those new  systems,  our
         competitors have an increased  opportunity to convince our customers to
         switch to their products, which may cause our revenues to decline
<PAGE>

The markets for our  products  are  intensely  competitive  and subject to rapid
technological  advancement  in design  tools,  wafer  manufacturing  techniques,
process  tools and  alternate  networking  technologies.  We must  identify  and
capture  future  market  opportunities  to offset the rapid price  erosion  that
characterizes  our  industry.  We may not be able to  develop  new  products  at
competitive pricing and performance levels. Even if we are able to do so, we may
not complete a new product and  introduce it to market in a timely  manner.  Our
customers may substitute use of our products in their next generation  equipment
with those of current or future competitors.

We typically face  competition  at the design stage,  where  customers  evaluate
alternative design approaches that require integrated circuits.  Our competitors
have  increasingly  frequent  opportunities  to  supplant  our  products in next
generation  systems  because of shortened  product life and design-in  cycles in
many of our customers' products.

Major domestic and international  semiconductor  companies,  such as Intel, IBM,
and  Lucent  Technologies,  are  concentrating  an  increasing  amount  of their
substantially  greater  financial and other resources on the markets in which we
participate.  This  represents  a serious  competitive  threat to PMC.  Emerging
companies   also  provide   significant   competition  in  our  segment  of  the
semiconductor market.

Our competitors include Applied Micro Circuits Corporation,  Broadcom,  Conexant
Systems,  Cypress  Semiconductor,  Dallas  Semiconductor,   Galileo  Technology,
Integrated  Device  Technology,   IBM,  Infineon,  Intel,  Lucent  Technologies,
Motorola, MMC Networks, Texas Instruments, Transwitch and Vitesse Semiconductor.
Over the next few years, we expect  additional  competitors,  some of which also
may have greater  financial  and other  resources,  to enter the market with new
products.  In addition,  we are aware of venture-backed  companies that focus on
specific  portions of our broad range of products.  Competition is  particularly
strong in the market for optical networking and optical telecommunication chips,
in part due to the market's growth rate, which attracts larger competitors,  and
in part due to the number of  smaller  companies  focused  on this  area.  These
companies,  individually or collectively, could represent future competition for
many design wins, and subsequent product sales.

         We must often redesign our products to meet rapidly  evolving  industry
         standards and customer  specifications,  which may delay an increase in
         our revenues

We sell  products to a market whose  characteristics  include  rapidly  evolving
industry  standards,  product  obsolescence,  and new  manufacturing  and design
technologies.  Many of the standards and protocols for our products are based on
high speed networking technologies that have not been widely adopted or ratified
by one of the standard setting bodies in our customers' industry.  Our customers
often delay or alter their design demands during this standard-setting  process.
In  response,  we must  redesign our  products to suit these  changing  demands.
Redesign usually delays the production of our products.  Our products may become
obsolete during these delays.

         If demand  for our  customers'  products  changes,  including  due to a
         downturn in the networking industry, our revenues could decline

Our customers routinely build inventories of our products in anticipation of end
demand for their  products.  Many of our customers have numerous  product lines,
numerous component  requirements for each product, and sizeable and very complex
supplier  structures.  This  makes  forecasting  their  production  requirements
difficult  and can lead to an inventory  surplus of certain of their  suppliers'
components.
<PAGE>

In the past,  some of our customers  have built PMC component  inventories  that
exceeded their production requirements. Those customers materially reduced their
orders and impacted our operating results. This may happen again.

In  addition,  while  all  of our  sales  are  denominated  in US  dollars,  our
customers'  products  are sold  worldwide.  Any major  fluctuations  in currency
exchange rates could materially affect our customers' end demand, and force them
to reduce orders, which could cause our revenues to decline.

         Since we develop products many years before their volume production, if
         we inaccurately  anticipate our customers'  needs, our revenues may not
         increase

Our   products   generally   take   between  18  and  24  months  from   initial
conceptualization  to  development  of a viable  prototype,  and another 6 to 18
months to be designed into our customers'  equipment and into  production.  They
often need to be  redesigned  because  manufacturing  yields on  prototypes  are
unacceptable  or customers  redefine  their  products to meet changing  industry
standards.  As a result, we develop products many years before volume production
and may inaccurately anticipate our customers' needs.

There have been times when we either  designed  products  that had more features
than were  demanded when they were  introduced  to the market or  conceptualized
products  that  were not  sufficiently  feature-rich  to meet  the  needs of our
customers or compete effectively against our competitors. This may happen again.

         If  the  recent  trend  of  consolidation  in the  networking  industry
         continues,  our  customers  may be acquired or sold,  which could cause
         those customers to cancel product lines or development projects and our
         revenues to decline

The networking  equipment  industry has experienced  significant merger activity
and partnership programs.  Through mergers or partnerships,  our customers could
seek to remove  redundancies in their product lines or development  initiatives.
This could lead to the  cancellation  of a product  line into which PMC products
are  designed or a  development  project on which PMC is  participating.  In the
cases of a product line cancellation, PMC revenues could be materially impacted.
In the case of a development  project  cancellation,  we may be forced to cancel
development of one or more products,  which could mean  opportunities for future
revenues from this development initiative could be lost.

         If there is not sufficient market acceptance of the recently  developed
         specifications  and  protocols on which our new products are based,  we
         may not be able to sustain or increase our revenues

We recently  introduced a number of ethernet  switch  products which function at
gigabit and fast ethernet speeds.  Gigabit ethernet involves the transmission of
data over  ethernet  protocol  networks at speeds of up to one billion  bits per
second.  Fast ethernet transmits data over these networks at speeds of up to 100
megabits per second. While gigabit and fast ethernet are well established, it is
not clear whether  products  meeting these  protocols will be  competitive  with
products  meeting  alternative  protocols,  or  whether  our  products  will  be
sufficiently attractive to achieve commercial success.
<PAGE>

Some  of  our  other  recently  introduced  products  adhere  to  specifications
developed by industry groups for transmissions of data signals, or packets, over
high-speed fiber optics transmission standards. These transmission standards are
called synchronous optical network, or SONET, in North America,  and synchronous
data  hierarchy,   or  SDH  in  Europe.  The  specifications,   commonly  called
packet-over-SONET/SDH,  may be rejected for other technologies,  such as mapping
IP directly  onto fiber.  In  addition,  we can not be sure whether our products
will  compete   effectively  with   packet-over-SONET/SDH   offerings  of  other
companies.

A  substantial  portion of our business  also relies on industry  acceptance  of
asynchronous  transfer  mode, or ATM,  products.  ATM is a networking  protocol.
While ATM has been an industry  standard for a number of years,  the overall ATM
market has not developed as rapidly as some observers had predicted it would. As
a result,  competing  communications  technologies,  including  gigabit and fast
ethernet and packet-over-SONET/SDH, may inhibit the future growth of ATM and our
sales of ATM products.

Our  business   strategy   contemplates   acquisition  of  other   companies  or
technologies, which could adversely affect our operating performance

We recently acquired or have announced acquisitions of four companies,  three of
which  have  design  wins for  their  products.  The  design  wins  have not yet
generated  significant revenue.  These or any follow on products may not achieve
commercial  success.  These  acquisition  may not  generate  future  revenues or
earnings.

Acquiring products, technologies or businesses from third parties is an integral
part of our business  strategy.  Management  may be diverted from our operations
while they identify and negotiate these  acquisitions  and integrate an acquired
entity into our operations.  Also, we may be forced to develop expertise outside
our  existing  businesses,  and  replace  key  personnel  who  leave  due  to an
acquisition.  We have not previously attempted to integrate several acquisitions
simultaneously and may not succeed in this effort.

A future acquisition could adversely affect operating results. In particular, if
we were to acquire a company or assets and record the acquisition as a purchase,
we may capitalize a significant  goodwill  asset.  This asset would be amortized
over its expected period of benefit.  The resulting  amortization  expense could
seriously impact operating results for many years.

An acquisition could absorb  substantial cash resources,  require us to incur or
assume debt obligations, or issue additional equity. If we issue more equity, we
may  dilute  our common  stock  with  securities  that have an equal or a senior
interest.

Acquired entities also may have unknown liabilities, and the combined entity may
not achieve the results that were anticipated at the time of the acquisition.

We  anticipate  lower  margins on mature and high volume  products,  which could
adversely affect our profitability
<PAGE>

We expect the average  selling prices of our products to decline as they mature.
Historically,  competition  in the  semiconductor  industry  has driven down the
average  selling  prices of products.  If we price our  products  too high,  our
customers may use a competitor's  product or an in-house  solution.  To maintain
profit  margins,  we must reduce our costs  sufficiently  to offset  declines in
average selling prices, or successfully sell  proportionately  more new products
with higher average  selling  prices.  Yield or other  production  problems,  or
shortages  of supply  may  preclude  us from  lowering  or  maintaining  current
operating costs.

We may not be  able  to meet  customer  demand  for  our  products  if we do not
accurately  predict demand or if we fail to secure adequate wafer fabrication or
assembly capacity

Anticipating demand is difficult because our customers face volatile pricing and
demand for their end-user networking equipment.  If our customers were to delay,
cancel or  otherwise  change  future  ordering  patterns,  we could be left with
unwanted inventory.

Recently, our suppliers,  particularly silicon wafer suppliers, have experienced
an increase in the demand for their  products or services.  If our silicon wafer
or other  suppliers are unable or unwilling to increase  productive  capacity in
line with the growth in demand,  we may suffer  longer  production  lead  times.
Longer  production  lead  times  require  that we  forecast  the  demand for our
products   further  into  the  future.   Thus,  a  greater   proportion  of  our
manufacturing  orders will be based on forecasts,  rather than actual  customers
orders. This increases the likelihood of forecasting  errors.  These forecasting
errors  could lead to excess  inventory  in certain  products  and  insufficient
inventory in others, which could adversely affect our operating results.

In addition,  if our  suppliers  are unable or unwilling to increase  productive
capacity in line with  demand,  we may suffer  supply  shortages or be allocated
supply.  A shortage  in supply  could  adversely  impact our  ability to satisfy
customer demand,  which could adversely affect our customer  relationships along
with our current and future operating results.

         We rely on a  limited  source of wafer  fabrication,  the loss of which
         could delay and limit our product shipments

We do not own or operate a wafer  fabrication  facility.  Two outside  foundries
supply most of our semiconductor device requirements. Our foundry suppliers also
produce  products for themselves and other  companies.  In addition,  we may not
have access to adequate capacity or certain process  technologies.  We have less
control over delivery schedules, manufacturing yields and costs than competitors
with their own  fabrication  facilities.  If the  foundries we use are unable or
unwilling  to  manufacture  our  products  in required  volumes,  we may have to
identify  and qualify  acceptable  additional  or  alternative  foundries.  This
qualification  process  could  take  six  months  or  longer.  We may  not  find
sufficient   capacity  quickly  enough,  if  ever,  to  satisfy  our  production
requirements.

Some companies  which supply our customers are similarly  dependent on a limited
number of suppliers to produce their products.  These other companies'  products
may be designed into the same  networking  equipment into which we are designed.
Our order levels could be reduced  materially  if these  companies are unable to
access  sufficient  production  capacity  to produce in volumes  demanded by our
customers because our customers may be forced to slow down or halt production on
the equipment into which we are designed.
<PAGE>

         We depend on third  parties in Asia for  assembly of our  semiconductor
         products which could delay and limit our product shipments

Sub-assemblers in Asia assemble all of our semiconductor  products. Raw material
shortages, political and social instability, assembly house service disruptions,
currency  fluctuations,  or other  circumstances in the region could force us to
seek additional or alternative sources of supply or assembly. This could lead to
supply  constraints or product delivery delays which, in turn, may result in the
loss of  customers.  We have less  control  over  delivery  schedules,  assembly
processes,  quality  assurances and costs than competitors that do not outsource
these tasks.

We depend on a limited number of design  software  suppliers,  the loss of which
could impede our product development

A limited  number of  suppliers  provide  the  computer  aided  design,  or CAD,
software  we  use  to  design  our  products.   Factors   affecting  the  price,
availability or technical  capability of these products could affect our ability
to access  appropriate CAD tools for the development of highly complex products.
In  particular,  the CAD  software  industry  has been the subject of  extensive
intellectual  property rights litigation,  the results of which could materially
change the  pricing  and nature of the  software  we use.  We also have  limited
control over whether our software  suppliers will be able to overcome  technical
barriers in time to fulfill our needs.

We are subject to the risks of conducting  business outside the United States to
a greater extent than  companies  which operate their  businesses  mostly in the
United States,  which may impair our sales,  development or manufacturing of our
products

We are subject to the risks of conducting  business outside the United States to
a greater  extent  than most  companies  because,  in  addition  to selling  our
products in a number of  countries,  a  significant  portion of our research and
development and manufacturing  are conducted outside of the United States.  This
subjects us to the following risks.

         We may lose our  ability  to design or  produce  products,  could  face
         additional  unforeseen  costs or could lose access to key  customers if
         any of the nations in which we conduct  business  impose trade barriers
         or new communications standards

We may have difficulty obtaining export licenses for certain technology produced
for us outside  the  United  States.  If a foreign  country  imposes  new taxes,
tariffs,  quotas, and other trade barriers and restrictions or the United States
and a  foreign  country  develop  hostilities  or  change  diplomatic  and trade
relationships,  we may not be able to continue  manufacturing or sub-assembly of
our  products in that country and may have fewer sales in that  country.  We may
also have fewer sales in a country that imposes new communications  standards or
technologies.  This could inhibit our ability to meet our customers'  demand for
our products and lower our revenues.

         If foreign exchange rates fluctuate  significantly,  our  profitability
         may decline
<PAGE>

We are exposed to foreign currency rate fluctuations  because a significant part
of our development,  test, marketing and administrative costs are denominated in
Canadian  dollars,  and our  selling  costs  are  denominated  in a  variety  of
currencies around the world. In addition,  a number of the countries in which we
have sales offices have a history of imposing exchange rate controls. This could
make it difficult to withdraw the foreign currency denominated assets we hold in
these countries.

         We may have difficulty  collecting  receivables from customers based in
         foreign countries, which could adversely affect our earnings

We sell our products to customers around the world. Payment cycle norms in these
countries may not be consistent  with our standard  payment terms.  Thus, we may
have greater difficulty  collecting  receivables on time from customers in these
countries.  This could impact our  financial  performance,  particularly  on our
balance sheet.

In addition,  we may be faced with greater difficulty in collecting  outstanding
balances due to the shear  distances  between our collection  facilities and our
customers,  and we may be unable to  enforce  receivable  collection  in foreign
nations  due to their  business  legal  systems.  If one or more of our  foreign
customers do not pay their outstanding receivable, we may be forced to write-off
the account. This could have a material impact on our earnings.

The loss of personnel could preclude us from designing new products

To succeed,  we must retain and hire technical  personnel  highly skilled at the
design and test  functions  used to develop high speed  networking  products and
related software.  The competition for such employees is intense. We, along with
our peers,  customers and other companies in the  communications  industry,  are
facing intense  competition for those employees from our peers and an increasing
number of  startup  companies  which are  emerging  with  potentially  lucrative
employee ownership arrangements.

We do not have employment  agreements in place with our key personnel.  We issue
common stock options that are subject to vesting as employee  incentives.  These
options,  however,  are  effective  as  retention  incentives  only if they have
economic value.

If we cannot protect our proprietary  technology,  we may not be able to prevent
competitors  from copying our technology  and selling  similar  products,  which
would harm our revenues

To compete effectively,  we must protect our proprietary information. We rely on
a  combination   of  patents,   trademarks,   copyrights,   trade  secret  laws,
confidentiality   procedures   and   licensing   arrangements   to  protect  our
intellectual  property  rights.  We hold  several  patents  and have a number of
pending patent applications.

We might not succeed in attaining patents from any of our pending  applications.
Even if we are awarded patents,  they may not provide any meaningful  protection
or  commercial  advantage  to us,  as they  may not be of  sufficient  scope  or
strength,  or may not be issued in all countries where our products can be sold.
In addition, our competitors may be able to design around our patents.
<PAGE>

We develop,  manufacture and sell our products in Asian and other countries that
may not protect our products or intellectual  property rights to the same extent
as the laws of the  United  States.  This  makes  piracy of our  technology  and
products more likely.  Steps we take to protect our proprietary  information may
not be  adequate  to  prevent  theft  of our  technology.  We may not be able to
prevent our competitors  from  independently  developing  technologies  that are
similar to or better than ours.

Our products employ  technology  that may infringe on the proprietary  rights of
third parties, which may expose us to litigation and prevent us from selling our
products

Vigorous  protection and pursuit of  intellectual  property  rights or positions
characterize  the  semiconductor  industry.  This often results in expensive and
lengthy litigation. We, as well as our customers or suppliers, may be accused of
infringing  on  patents or other  intellectual  property  rights  owned by third
parties.  This has  happened in the past.  An adverse  result in any  litigation
could force us to pay substantial damages, stop manufacturing, using and selling
the infringing products,  spend significant resources to develop  non-infringing
technology,  discontinue  using  certain  processes  or obtain  licenses  to the
infringing technology. In addition, we may not be able to develop non-infringing
technology,  nor might we be able to find  appropriate  licenses  on  reasonable
terms.

Patent  disputes  in  the  semiconductor  industry  are  often  settled  through
cross-licensing  arrangements.  Because we currently  do not have a  substantial
portfolio of patents compared to our larger  competitors,  we may not be able to
settle  an  alleged  patent   infringement   claim  through  a   cross-licensing
arrangement.  We are  therefore  more exposed to third party claims than some of
our larger competitors and customers.

In the past,  our customers  have been required to obtain  licenses from and pay
royalties  to  third  parties  for  the  sale  of  systems   incorporating   our
semiconductor  devices.  Until December of 1997, we indemnified our customers up
to the dollar amount of their  purchases of our products  found to be infringing
on technology owned by third parties.  Customers may also make claims against us
with respect to infringement.

Furthermore,  we may initiate  claims or  litigation  against  third parties for
infringing  our  proprietary   rights  or  to  establish  the  validity  of  our
proprietary  rights.  This could  consume  significant  resources and divert the
efforts  of  our  technical  and   management   personnel,   regardless  of  the
litigation's outcome.

Securities we issue to fund our operations could dilute your ownership

We may need to raise  additional  funds through public or private debt or equity
financing  to  fund  our  operations.  If  we  raise  funds  by  issuing  equity
securities, the percentage ownership of current stockholders will be reduced and
the new equity  securities may have priority rights to your  investment.  We may
not obtain sufficient  financing on terms we or you will find favorable.  We may
delay,  limit or eliminate  some or all of our proposed  operations  if adequate
funds are not available.

Our stock price has been and may continue to be volatile

<PAGE>


In the past,  our common stock price has  fluctuated  significantly.  This could
continue as our or our competitors  announce new products,  our and our peers or
customers'  results  fluctuate,  conditions in the  networking or  semiconductor
industry change or investors change their sentiment toward technology stocks.

In addition, increases in our stock price and expansion of our price-to-earnings
multiple may have made our stock attractive to momentum or day-trading investors
who  often  shift  funds  into and out of  stocks  rapidly,  exacerbating  price
fluctuations in either direction particularly when viewed on a quarterly basis.


Item 7a.  QUANTITATIVE AND QUALITATIVE DISCLOSURES
          ABOUT MARKET RISK

The following  discussion  regarding  our risk  management  activities  contains
"forward-looking  statements"  that  involve  risks  and  uncertainties.  Actual
results  may differ  materially  from  those  projected  in the  forward-looking
statements.

We are exposed to foreign currency fluctuations through our operations in Canada
and  elsewhere.  In our effort to hedge this risk,  we  typically  forecast  our
operational  currency  needs,  purchase  such currency on the open market at the
beginning  of an  operational  period,  and hold these funds as a hedge  against
currency  fluctuations.  We usually limit the operational  period to 3 months or
less.  While we expect to utilize  this method of hedging  our foreign  currency
risk in the future,  we may change our hedging  methodology  and utilize foreign
exchange  contracts  that are currently  available  under our operating  line of
credit agreement.

Occasionally, we may not be able to correctly forecast our operational needs. If
our  forecasts  are  overstated  or  understated   during  periods  of  currency
volatility,  we could experience  unanticipated currency gains or losses. At the
end of 1999, we did not have significant foreign currency  denominated net asset
or  net  liability  positions,  and  we  had  no  outstanding  foreign  exchange
contracts.

We maintain cash  equivalent and  short-term  investment  portfolio  holdings of
various  issuers,  types,  and maturity  dates with various banks and investment
banking  institutions.  We occasionally hold short-term  investments  beyond 120
days, and the market value of these investments on any day during the investment
term may vary as a result of market interest rate fluctuations.  We do not hedge
this exposure because short-term fluctuations in interest rates would not likely
have a material  impact on interest  earnings.  We classify our  investments  as
available-for-sale  or  held-to-maturity at the time of purchase and re-evaluate
this  designation  as of each balance  sheet date. We had  approximately  $106.6
million in outstanding short-term investments at the end of 1999.

YEAR 2000 COMPUTER SYSTEMS ISSUES UPDATE

To date our systems and software have not  experienced  any material  disruption
due to the  onset  of the  Year  2000,  and we  have  completed  our  Year  2000
preparedness activities. All of our systems are operating normally, as are those
of our customers and  suppliers.  Our  expenditures  on the year 2000 issue were
immaterial.




<PAGE>


ITEM 8.   Financial Statements and Supplementary Data.

The chart  entitled  "Quarterly  Data  (Unaudited)"  contained in Item 6 Part II
hereof is hereby  incorporated  by reference into this Item 8 of Part II of this
Form 10-K.


<TABLE>

                                PMC-Sierra, Inc.

                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
                        AND FINANCIAL STATEMENT SCHEDULES

Consolidated Financial Statements Included in Item 8:

<CAPTION>
                                                                                         Page

<S>                                                                                       <C>
Report of Deloitte & Touche LLP, Independent Auditors.................................    --
Consolidated Balance Sheets at December 31, 1999 and 1998.............................    --
Consolidated Statements of Operations for each of the three years in the period
    ended December 31, 1999...........................................................    --

Consolidated Statements of Stockholders' Equity for each of the three years in
    the period ended December 31, 1999................................................    --

Consolidated Statements of Cash Flows for each of the three years in the period
    ended December 31, 1999...........................................................    --

Notes to Consolidated Financial Statements............................................    --

Schedules  for each of the three  years in the period  ended  December  31, 1999
included in Item 14 (d):

II  Valuation and Qualifying Accounts.................................................    --

Schedules not listed above have been omitted  because they are not applicable or
are not  required,  or the  information  required  to be set  forth  therein  is
included in the financial statements or the notes thereto.

</TABLE>
<PAGE>


              Report of Deloitte & Touche LLP, Independent Auditors

The Board of Directors and Stockholders of PMC-Sierra, Inc.

We have audited the accompanying consolidated balance sheets of PMC-Sierra, Inc.
as of  December  31, 1999 and 1998 and the related  consolidated  statements  of
operations,  stockholders'  equity and cash flows for each of the three years in
the period  ended  December  31, 1999.  Our audits also  included the  financial
statement  schedule  listed  in the  index  at Item  14(a).  These  consolidated
financial  statements  and  schedule  are the  responsibility  of the  Company's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements and schedule based on our audits.

We conducted our audits in accordance with generally accepted auditing standards
in the United States. Those standards require that we plan and perform the audit
to obtain reasonable  assurance about whether the financial  statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting  the amounts and  disclosures in the financial  statements.  An audit
also includes assessing the accounting principles used and significant estimates
made by  management,  as well as  evaluating  the  overall  financial  statement
presentation.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

In our opinion, the consolidated  financial statements referred to above present
fairly,  in all  material  respects,  the  consolidated  financial  position  of
PMC-Sierra,  Inc.  at  December  31,  1999  and  1998,  and the  results  of its
operations  and its cash flows for each of the three  years in the period  ended
December 31, 1999, in conformity with generally accepted  accounting  principles
in the United  States.  Also, in our opinion,  the related  financial  statement
schedule,  when  considered  in  relation  to the basic  consolidated  financial
statements  taken as a whole,  presents  fairly  in all  material  respects  the
information set forth therein.


/s/ DELOITTE & TOUCHE LLP

Vancouver, British Columbia
January 17, 2000 (March 3, 2000, as to Note 14)

<PAGE>
<TABLE>


                                PMC-Sierra, Inc.
                           CONSOLIDATED BALANCE SHEETS
                        (in thousands, except par value)

<CAPTION>
                                                                                       December 31,
                                                                                -----------------------------
<S>                                                                                <C>             <C>
                                                                                   1999            1998

ASSETS
Current assets:
  Cash and cash equivalents                                                        $  84,091       $  38,507
  Short-term investments                                                             106,636          50,893
  Accounts receivable, net of allowance for doubtful accounts
   of $1,244 ($1,128 in 1998)                                                         35,698          26,227
  Inventories, net                                                                     7,208           3,617
  Deferred income taxes                                                                9,270           1,506
  Prepaid expenses and other current assets                                            6,822           4,045
  Short-term deposits for wafer fabrication capacity                                   4,637           4,000
                                                                                -------------    -----------
    Total current assets                                                             254,362         128,795

Property and equipment, net                                                           45,489          32,452
Goodwill and other intangible assets, net of accumulated
  amortization of $9,961 ($6,455 in 1998)                                             15,280          19,629
Investments and other assets                                                          12,356           4,500
Deposits for wafer fabrication capacity                                               14,483          19,120
                                                                                ------------     -----------
                                                                                   $ 341,970       $ 204,496
                                                                                =============    ===========

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                                                 $  11,333       $   8,964
  Accrued liabilities                                                                 15,765          14,694
  Deferred income                                                                     34,486          12,517
  Income taxes payable                                                                26,183          13,897
  Current portion of obligations under capital leases and long-term debt               1,348           5,111
                                                                                -------------    -----------
    Total current liabilities                                                         89,115          55,183

Deferred income taxes                                                                  9,091           4,357
Noncurrent obligations under capital leases and long-term debt                         1,080           5,894
Commitments and contingencies (Note 7)

Special shares convertible into 4,242 (5,036 in 1998) common stock                     6,998           8,387

Stockholders' equity
  Preferred stock, par value $0.001; 5,000 shares authorized:
    none issued or outstanding in 1999 and 1998                                            -               -
  Common stock and additional paid in capital, par value $0.001;
    200,000 shares authorized (100,000 shares in 1998)
    136,812 shares issued and outstanding (125,660 in 1998)                          206,790         191,134
  Deferred stock compensation                                                         (2,487)         (1,822)
  Retained earnings (accumulated deficit)                                             31,383         (58,637)
                                                                                -------------    ------------
    Total stockholders' equity                                                       235,686          130,675
                                                                                -------------    -----------
                                                                                   $ 341,970        $ 204,496
                                                                                =============    ============

See notes to consolidated financial statements.

</TABLE>

<PAGE>

<TABLE>

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

<CAPTION>

                                                                             Year Ended December 31,
                                                                ------------------------------------------------
<S>                                                                 <C>              <C>              <C>
                                                                       1999             1998             1997


Net revenues                                                        $ 262,477        $ 161,812        $ 127,166

Cost of revenues                                                       55,363           38,220           33,065
                                                                --------------   --------------  ---------------
  Gross profit                                                        207,114          123,592           94,101

Other costs and expenses:
  Research and development                                             63,333           35,891           22,880
  Marketing, general and administrative                                44,072           29,246           23,366
  Amortization of goodwill                                              1,252              915              300
  Costs of merger                                                         866                -                -
  Acquisition of in process research and development                        -           39,176                -
  Impairment of intangible assets                                           -            4,311                -
  Restructuring and other costs                                             -                -           (1,383)
                                                                --------------   --------------  ---------------
Income from operations                                                 97,591           14,053           48,938
Interest and other income, net                                          7,232            2,875              973
Gain on sale of investments                                            26,800                -                -
                                                                --------------   --------------  ---------------
Income before provision for income taxes                              131,623           16,928           49,911

Provision for income taxes                                             41,603           22,873           15,727
                                                                --------------   --------------  ---------------
Net income (loss)                                                   $  90,020        $  (5,945)       $  34,184
                                                                ==============   ==============  ===============
Net income (loss) per common share - basic                          $    0.66        $   (0.05)       $    0.27
                                                                ==============   ==============  ===============
Net income (loss) per common share - diluted                        $    0.60        $   (0.05)       $    0.26
                                                                ==============   ==============  ===============

Shares used in per share calculation - basic                          137,428          130,760          124,756
Shares used in per share calculation - diluted                        151,134          130,760          131,122

See notes to consolidated financial statements.


</TABLE>


<PAGE>
<TABLE>

                                PMC-Sierra, Inc.
                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                 (in thousands)
<CAPTION>

                                                                  Common Stock
                                                                 and Additional
                                                                    Paid in
                                            Common Stock            Capital          Deferred                            Total
                                        ----------------------------------------      Stock        Accumulated    Stockholders
                                          Number of Shares           Amount       Compensation       Deficit            Equity

<S>                                               <C>            <C>               <C>               <C>             <C>
Balances at December 31, 1996                     114,588        $ 135,320         $      -          $ (86,876)      $  48,444
Conversion of special shares
  into common stock                                 1,276            1,701                -                  -           1,701
Issuance of common stock
  under stock benefit plans                         3,136            6,385                -                  -           6,385
Net income                                              -                -                -             34,184          34,184
- ------------------------------------------------------------------------------------------------------------------------------
Balances at December 31, 1997                     119,000          143,406                -            (52,692)         90,714
Conversion of special shares
  into common stock                                 1,436            2,406                -                  -           2,406
Issuance of common stock
  under stock benefit plans                         3,564           14,338                -                  -          14,338
Issuance of common stock and
stock options to acquire Integrated
Telecom Technology, Inc.                            1,660           28,221                -                  -          28,221
Deferred stock compensation                             -            2,763           (2,763)                 -               -
Amortization of deferred
  stock compensation                                    -                -              941                  -             941
Net loss                                                -                -                -             (5,945)        (5,945)
- ------------------------------------------------------------------------------------------------------------------------------
Balances at December 31, 1998                     125,660        $ 191,134         $ (1,822)         $ (58,637)      $ 130,675
Conversion of special shares
  into common stock                                   792            1,389                -                  -           1,389
Issuance of common stock
  under stock benefit plans                        10,272           11,180                -                  -          11,180
Conversion of warrants
  into common stock                                    88               75                -                  -              75
Deferred stock compensation                             -            3,012           (3,012)                 -               -
Amortization of deferred
  stock compensation                                    -                -            2,347                  -           2,347
Net income                                              -                -                -             90,020          90,020
- ------------------------------------------------------------------------------------------------------------------------------
Balances at December 31, 1999                     136,812        $ 206,790         $ (2,487)          $ 31,383       $ 235,686
- ------------------------------------------------------------------------------------------------------------------------------



See notes to consolidated financial statements.
</TABLE>




<PAGE>

<TABLE>
<CAPTION>
                                                       PMC-Sierra, Inc.
                                             CONSOLIDATED STATEMENTS OF CASH FLOWS
                                       Increase (Decrease) in cash and cash equivalents
                                                        (in thousands)
                                                                                            Year Ended December 31,
                                                                                 -----------------------------------------------
<S>                                                                                  <C>              <C>             <C>
                                                                                     1999             1998            1997
Cash flows from operating activities:
  Net income (loss)                                                                   $ 90,020         $ (5,945)       $ 34,184
  Adjustments to reconcile net income (loss) to net cash
  provided by operating activities:
    Depreciation of plant and equipment                                                 17,627           11,440           7,787
    Amortization of intangibles                                                          3,599            2,850           1,363
    Amortization of deferred stock compensation                                          2,347              941               -
    Deferred income taxes                                                               (3,030)          (1,172)          3,082
    Equity in income of investee                                                          (792)               -               -
    Gain on sale of investments                                                        (26,800)               -               -
    Acquisition of in process research and development                                       -           39,176               -
    Impairment of intangible assets                                                          -            4,311               -
    Loss on disposal of equipment                                                            -                -             258
    Recovery related to restructuring provision                                              -                -          (1,383)
    Changes in operating assets and liabilities:
      Accounts receivable                                                               (9,471)          (9,861)         (1,196)
      Inventories                                                                       (3,591)             137           4,662
      Prepaid expenses and other                                                        (1,780)          (1,370)          1,000
      Accounts payable and accrued liabilities                                           3,842            1,484          (1,530)
      Income taxes payable                                                              12,286            5,117           4,730
      Deferred income                                                                   21,969           10,419           2,098
      Accrued restructuring costs                                                            -                -         (14,942)
      Net liabilities associated with discontinued operations                                -             (301)         (1,299)
                                                                                 --------------  ---------------  --------------
        Net cash provided by operating activities                                      106,226           57,226          38,814
                                                                                 --------------  ---------------  --------------

Cash flows from investing activities:
  Purchases of short-term investments                                                 (109,635)         (53,001)        (59,187)
  Proceeds from sales and maturities of short-term investments                          53,892           43,442          24,877
  Purchases of plant and equipment                                                     (30,664)         (22,513)         (8,221)
  Proceeds from sale of equipment and capacity assets                                        -                -           7,631
  Purchases of investments                                                              (9,130)               -          (3,000)
  Proceeds from sale of investments                                                     28,628                -               -
  Purchase of intangible assets                                                           (411)               -               -
  Proceeds from refund of wafer fabrication deposits                                     4,000            4,000               -
  Payment for purchase of Integrated Telecom Technology, Inc.,
    net of cash acquired                                                                     -          (27,165)              -
  Purchase of other in process research and development                                      -           (1,419)              -
                                                                                 --------------  ---------------  --------------
        Net cash used in investing activities                                          (63,320)         (56,656)        (37,900)
                                                                                 --------------  ---------------  --------------

Cash flows from financing activities:
  Proceeds from notes payable                                                            1,817            1,211              50
  Repayment of notes payable and other long-term debt                                   (2,170)            (541)         (2,640)
  Proceeds from sale/leaseback of equipment                                                  -                -           1,107
  Principal payments under capital lease obligations                                    (8,224)          (5,030)        (12,895)
  Proceeds from issuance of common stock                                                11,255           14,338           6,385
                                                                                 --------------  ---------------  --------------
        Net cash provided by (used in) financing activities                              2,678            9,978          (7,993)
                                                                                 --------------  ---------------  --------------

Net increase (decrease) in cash and cash equivalents                                    45,584           10,548          (7,079)
Cash and cash equivalents, beginning of the year                                        38,507           27,959          35,038
                                                                                 ==============  ===============  ==============
Cash and cash equivalents, end of the year                                            $ 84,091         $ 38,507        $ 27,959
                                                                                 ==============  ===============  ==============

See notes to consolidated financial statements.

</TABLE>





<PAGE>




                                PMC-Sierra, Inc.
                   Notes to Consolidated Financial Statements
                  Years Ended December 31, 1999, 1998 and 1997


NOTE 1.   Summary of Significant Accounting Policies

Description  of  business.  PMC-Sierra,  Inc (the  "Company" or "PMC" ) provides
customers with  Internetworking  semiconductor  system  solutions for high speed
transmission and networking systems.

Basis  of  presentation.  The  accompanying  consolidated  financial  statements
include the accounts of PMC-Sierra, Inc. and its wholly owned subsidiaries.  All
significant  inter-company  accounts and transactions have been eliminated.  The
Company's  fiscal year ends on the last Sunday of the calendar year. For ease of
presentation,  the reference to December 31 has been utilized as the fiscal year
end for all financial statement captions.  Fiscal years 1999, 1998 and 1997 each
consisted of 52 weeks.  The  Company's  reporting  currency is the United States
dollar.

Estimates.  The preparation of financial statements in conformity with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect reported amounts of assets,  liabilities,  revenues and
expenses,  and disclosure of contingent  assets and  liabilities as of the dates
and for the periods  presented.  Estimates are used for, but not limited to, the
accounting  for  doubtful  accounts,   inventory   reserves,   depreciation  and
amortization,  sales returns,  warranty costs, taxes and  contingencies.  Actual
results may differ from those estimates.

Cash, cash equivalents and short-term investments.  Cash equivalents are defined
as highly  liquid  debt  instruments  with  original  maturities  at the date of
acquisition  of 90 days or less  that have  insignificant  interest  rate  risk.
Short-term  investments  are defined as money market  instruments  with original
maturities greater than 90 days, but less than one year.

Under Financial Accounting Standards No. 115 "Accounting for Certain Investments
in Debt and Equity Securities" ("SFAS 115"),  management classifies  investments
as   available-for-sale   or  held-to-maturity  at  the  time  of  purchase  and
re-evaluates  such  designation  as of  each  balance  sheet  date.  Investments
classified  as  held-to-maturity  securities  are stated at amortized  cost with
corresponding  premiums or discounts  amortized against interest income over the
life of the investment.

Marketable  equity and debt  securities not classified as  held-to-maturity  are
classified as  available-for-sale  and reported at fair value.  Unrealized gains
and losses on these  investments are included in equity as a separate  component
of  stockholders'  equity.  The cost of securities sold is based on the specific
identification method.

As at December 31, 1999 and 1998, the Company's short-term investments consisted
solely  of   held-to-maturity   investments   and  their   carrying   value  was
substantially  the same as their market value.  Proceeds from sales and realized
gains  or  losses  on  sales  of  available-for-sale  securities  for all  years
presented were immaterial.

Inventories.  Inventories  are stated at the lower of cost (first-in, first out)
or market (estimated net realizable value).

<PAGE>

The components of inventories are as follows:

                                                        December 31,
                                                --------------------------------
(in thousands)                                           1999            1998

Work-in-progress                                      $ 4,031         $ 1,761
Finished goods                                          3,177           1,856
                                                ---------------  --------------
                                                      $ 7,208         $ 3,617
                                                ===============  ==============

Property  and  equipment,  net.  Property and  equipment  are stated at cost and
depreciated  using the  straight-line  method over the estimated useful lives of
the  assets,  ranging  from two to five  years,  or the  applicable  lease term,
whichever is shorter.  The carrying  value of property and equipment is reviewed
periodically for any permanent impairment in value.

The components of property and equipment are as follows:
                                                        December 31,
                                                -------------------------------
(in thousands)                                           1999            1998

Machinery and equipment                               $ 79,521        $ 53,883
Leasehold improvements                                   5,353           2,683
Furniture and fixtures                                   4,484           2,653
                                                ---------------- ---------------
Total cost                                              89,358          59,219
Accumulated depreciation                               (43,869)        (26,767)
                                                ---------------- ---------------
                                                      $ 45,489        $ 32,452
                                                ================ ===============

The Company  leases  furniture and equipment  under  long-term  capital  leases.
Accordingly,  capitalized  costs of approximately  $4,301,000 and $17,686,000 at
December  31,  1999 and 1998,  respectively,  and  accumulated  amortization  of
approximately $3,738,000 and $12,067,000, respectively, are included in property
and equipment.

Goodwill and other intangible  assets.  Goodwill,  developed and core technology
and other intangible  assets are carried at cost less accumulated  amortization,
and are being amortized on a straight-line  basis over the economic lives of the
respective assets,  generally three to seven years. Among other  considerations,
to assess impairment,  the Company  periodically  estimates  undiscounted future
cash flows to  determine if they exceed the  unamortized  balance of the related
intangible asset.

<PAGE>

The  components  of goodwill  and other  intangible  assets,  net arose from the
following acquisitions:

                                                        December 31,
                                                -------------------------------
(in thousands)                                           1999            1998

PMC-Sierra, Ltd.                                      $  5,390        $  6,665
Bipolar Integrated Technology, Inc.                        170             216
Integrated Telecom Technology, Inc.                      9,720          12,748
                                                ---------------  ---------------
                                                      $ 15,280        $ 19,629
                                                ===============  ===============

Investments  in Non-Public  Companies.  The Company has certain  investments  in
non-publicly traded companies in which it has less that 20% of the voting rights
and in which it does not exercise significant  influence.  These investments are
carried at cost. The Company monitors these investments for impairment and makes
appropriate reductions in carrying value when necessary.

Investments in Equity  Accounted  investees.  Investees in which the Company has
between 20% and 50% of the voting  rights,  and in which the  Company  exercises
significant influence, are accounted for using the equity method.

Deposits  for wafer  fabrication  capacity.  Two  independent  foundries  supply
substantially all of the Company's products.  Under wafer supply agreements with
these  foundries,  the  Company  has  deposits  of $19.1  million  (1998 - $23.1
million)  to secure  access to wafer  fabrication  capacity.  During  1999,  the
Company  purchased  $30.5 million  ($18.3  million and $13.2 million in 1998 and
1997,  respectively) from these foundries.  Purchases in any year may or may not
be indicative  of any future period since wafers are purchased  based on current
market pricing and the Company's volume requirements change in relation to sales
of its products.

In each year,  the  Company is  entitled to receive a refund of a portion of the
deposits  based on the annual  purchases  from these  suppliers  compared to the
target  levels in the wafer  supply  agreements.  Based on 1999  purchases,  the
Company is entitled to receive a $4.6 million refund from these suppliers in the
first  quarter of 2000.  If the Company does not receive back the balance of its
deposits during the term of the agreements,  then the outstanding  deposits will
be refunded to the Company at the termination of the agreements.

<PAGE>


Accrued liabilities.  The components of accrued liabilities are as follows:


                                                          December 31,
                                                -------------------------------
(in thousands)                                        1999              1998

Accrued compensation and benefits                   $  7,132           $ 5,482
Accrued royalties                                          -               175
Other accrued liabilities                              8,633             9,037
                                                -------------     --------------
                                                    $ 15,765          $ 14,694
                                                =============    ===============


Foreign currency translation. For all foreign operations, the U.S. dollar is the
functional currency. Assets and liabilities in foreign currencies are translated
using the  exchange  rate at the balance  sheet date.  Revenues and expenses are
translated at average rates of exchange  during the year.  Gains and losses from
foreign currency transactions are included in interest and other income, net.

Fair value of financial instruments.  The estimated fair value amounts have been
determined by the Company using  available  market  information  and appropriate
valuation   methodologies.   However,   considerable  judgment  is  required  in
interpreting  market data to develop the  estimates of fair value.  Accordingly,
the estimates  presented  herein are not  necessarily  indicative of the amounts
that the Company could realize in a current market exchange.

The  Company's   carrying  value  of  cash  and  cash  equivalents,   short-term
investments,  accounts  receivable,  accounts  payable and  accrued  liabilities
approximates fair value because the instruments have a short-term maturity.

The fair value of the Company's  long-term  debt and  obligations  under capital
leases at December 31, 1999 and 1998 also approximates their carrying value.

The fair value of the deposits for wafer fabrication capacity is not practicably
determinable.

Concentrations.  The Company maintains its cash, cash equivalents and short-term
investments  in  investment  grade  financial   instruments  with   high-quality
financial institutions, thereby reducing credit risk concentrations.

At December  31,  1999,  approximately  51% (1998 - 41%) of accounts  receivable
represented  amounts  due from one of the  Company's  distributors.  The Company
believes that this  concentration and the concentration of credit risk resulting
from  trade  receivables  owing  from  high-technology   industry  customers  is
substantially mitigated by the Company's credit evaluation process, large number
of customers, relatively short collection terms, and the geographical dispersion
of sales.  The  Company  generally  does not  require  collateral  security  for
outstanding amounts.

The  Company  relies on a  limited  number of  suppliers  for wafer  fabrication
capacity.

<PAGE>


Revenue  recognition.  Revenues from product sales direct to customers and minor
distributors  are  recognized at the time of shipment.  The Company  accrues for
warranty costs, sales returns and other allowances at the time of shipment based
on its  experience.  Certain of the  Company's  product  sales are made to major
distributors  under  agreements  allowing for price  protection  and/or right of
return on products  unsold.  Accordingly,  the  Company  defers  recognition  of
revenue on such sales until the products are sold by the distributors.

Interest and other income, net. The components of interest and other income, net
are as follows:



                                                Year Ended December 31,
                                   ---------------------------------------------
(in thousands)                           1999             1998            1997

Interest income                      $  7,492         $  3,846        $  3,146
Interest expense (*)                     (812)          (1,006)         (2,020)
Equity in income of investee              792                -               -
Other                                    (240)              35            (153)
                                   -----------    -------------   -------------
                                     $  7,232         $  2,875         $   973
                                   ===========    =============   =============

* consists primarily of interest on long-term debt and capital leases


Income Taxes. Income taxes are reported under Statement of Financial  Accounting
Standards No. 109 and,  accordingly,  deferred income taxes are recognized using
the asset and liability method,  whereby deferred tax assets and liabilities are
recognized for the future tax consequences  attributable to differences  between
the financial  statement carrying amounts of existing assets and liabilities and
their respective tax basis, and operating loss and tax credit carryforwards.

Net  income  (loss)  per  common  share.  Basic net  income  (loss) per share is
computed  using the weighted  average  number of shares  outstanding  during the
period. The PMC-Sierra Ltd. Special Shares have been included in the calculation
of basic net income per share.  Diluted net income  (loss) per share is computed
using the  weighted  average  number of common and  dilutive  common  equivalent
shares outstanding during the period.  Dilutive common equivalent shares consist
of stock options and warrants.

Share  and per  share  data  presented  reflect  the  two-for-one  stock  splits
effective February 2000 and April 1999.

Segment  reporting.   In  1998,  the  Company  adopted  Statement  of  Financial
Accounting  Standards No. 131,  Disclosures  about Segments of an Enterprise and
Related  Information  (SFAS 131). SFAS 131 uses a management  approach to report
financial and  descriptive  information  about a Company's  operating  segments.
Operating  segments are  revenue-producing  components  of the Company for which
separate  financial   information  is  produced  internally  for  the  Company's
management.  Under  this  definition,  the  Company  operated,  for all  periods
presented, in two segments: networking and non-networking products.

<PAGE>


Comprehensive income. Under Statement of Financial Accounting Standards No. 130,
Reporting  Comprehensive  Income ("SFAS 130"), the Company is required to report
total  comprehensive  income and comprehensive  income per share.  Comprehensive
income is defined as changes in  stockholders'  equity exclusive of transactions
with  owners such as capital  contributions  and  dividends.  The Company has no
comprehensive  income  items,  other  than the net  income or loss in any of the
years presented.

Recently issued  accounting  standards.  In June 1998, the Financial  Accounting
Standards  Board  ("FASB")  issued  SFAS No.  133,  "Accounting  for  Derivative
Instruments and Hedging Activities",  which establishes accounting and reporting
standards for derivative instruments and hedging activities.  The Statement will
require the recognition of all derivatives on the Company's consolidated balance
sheet at fair value. The FASB has  subsequently  delayed  implementation  of the
standard to the  financial  years  beginning  after June 15,  2000.  The Company
expects to adopt the new Statement  effective January 1, 2001. The impact on the
Company's financial statements is not expected to be material.

Reclassifications. Certain prior year amounts have been reclassified in order to
conform with the 1999 presentation.


NOTE 2. Business Combinations and Investments in Other Companies

Acquisition of Abrizio, Inc.
- ---------------------------
In 1999, the Company acquired Abrizio, Inc. ("Abrizio"), a fabless semiconductor
company  that  specializes  in  broadband  switch chip  fabrics used in core ATM
switches, digital cross-connects,  and terabit routers. PMC issued approximately
8,704,000  shares in  PMC-Sierra  common stock and PMC stock options in exchange
for all of the outstanding equity securities and options of Abrizio.

The transaction was accounted for as a pooling of interests and accordingly, all
prior periods have been restated.

The historical  results of operations of the Company and Abrizio for the periods
prior to the merger are as follows:


                                   Six Months
                                     Ended        Year Ended December 31,
                                  -------------  -------------------------------
                                   June 27,             1998            1997
                                     1999
Net revenues
PMC                                 $ 109,426        $ 161,812        $ 127,166
Abrizio                                   850                -                -
                                 -------------    -------------   --------------
Combined                              110,276          161,812          127,166
                                 =============    =============    =============

Net income (loss)
PMC                                    51,715           (2,878)          34,258
Abrizio                                (3,670)          (3,067)             (74)
                                 -------------    -------------   --------------
Combined                            $  48,045        $  (5,945)       $  34,184
                                 =============    =============   ==============

<PAGE>



During the  quarter  ended  September  26,  1999,  PMC  recorded  merger-related
transaction  costs of $866,000  related to the  acquisition  of  Abrizio.  These
charges,  which consist primarily of investment  banking and other  professional
fees, have been included under costs of merger in the Consolidated Statements of
Operations.



<PAGE>


Acquisition of Integrated Telecom Technology, Inc.
- --------------------------------------------------
In 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 balance of $28.2 million by the issuance of  approximately  1,660,000 shares
of common stock and options to purchase  approximately  214,000 shares of common
stock (based on the market value of PMC common stock on the issuance date).  The
purchase  price  includes  professional  fees  and  other  direct  costs  of the
acquisition  totaling  $850,000.   IGT  was  a  fabless   semiconductor  company
headquartered  in  Gaithersburg,  Maryland with a development  site in San Jose,
California.  Upon  consummation  of  the  transaction,  IGT  was  merged  with a
wholly-owned subsidiary of the Company.

The  acquisition  was accounted for using the purchase  method of accounting and
the final allocation among tangible and intangible assets and liabilities was as
follows:

Tangible assets                                                          $ 4,598

Intangible assets:
       Developed and core technology                                       7,830
       Assembled workforce                                                 1,050
       Goodwill                                                            9,284

In process research and development ("IPR&D")                             37,757

Liabilities                                                              (4,669)
                                                                      ----------
                                                                         $55,850
                                                                      ==========

The amount allocated to IPR&D of $37.8 million was expensed upon acquisition, as
it was  determined  that the underlying  projects had not reached  technological
feasibility,  had no  alternative  future  use and  successful  development  was
uncertain.  In the  allocation of the IGT  acquisition  purchase  price to IPR&D
consideration was given to the following for each in process project at the time
of the acquisition:

(1)      the  present  value of the  forecasted  cash flows and income that were
         expected to result from the projects;
(2)      the status of the projects;
(3)      completion costs;
(4)      project risks;
(5)      the value of core technology; and
(6)      the stage of completion of the individual project.

<PAGE>


In valuing core  technology,  the relative  allocations  to core  technology and
IPR&D were consistent with the relative  contributions  of each project.  In the
determination of the value of IPR&D was determined based on efforts completed as
of the date IGT was acquired.

As of the acquisition  date, IgT had three development  projects in process.  In
order to develop these projects into commercially  viable products,  the Company
had to complete all  planning,  designing  and testing  activities  necessary to
establish that the products could be produced to meet their design requirements.

Project A was completed in the first quarter of 1999 and was in full  production
by the end of the year.  Project B was in  development  in the fourth quarter of
1998  and  was in full  production  by the  first  quarter  of  1999.  This  was
consistent with the initial estimates used in the valuation of the project.

During the third quarter of 1998,  the Company  determined  that the  intangible
value of Project C was impaired.  The developed and core  technology  related to
this  project in process at the time of  acquisition  was  determined  not to be
technologically  feasible and had no  alternative  future use. As a result,  the
Company  recognized  an  impairment  of $4.3  million in  intangible  assets and
related goodwill.


<PAGE>


NOTE 3.  Investments and Other Assets

The components of Investments and Other Assets are as follows:

                                                          December 31,
                                                  ------------------------------
(in thousands)                                         1999            1998

Investments in Non-Public Companies                $  8,680        $  4,091
Investments in Equity Accounted Investee              3,506
                                                                          -
Other Assets                                            170             409
                                                  -----------     --------------
                                                   $ 12,356        $  4,500
                                                  ===========     ==============



Investments in Non-Public Companies
- -----------------------------------

The Company has certain  investments in non-publicly  traded companies which are
generally  recorded at cost. In 1999,  the Company made  investments  in various
non-publicly traded companies for total cash consideration of $9.1 million (1998
- - nil; 1997 - $3 million).

During the second quarter of 1999, the Company  recognized a gain related to the
disposition of its investment in IC Works,  Inc.  ("ICW").  ICW was purchased by
Cypress Semiconductor,  Inc. ("Cypress"),  a publicly traded company. As part of
the purchase agreement between ICW and Cypress,  the Company's  preferred shares
in ICW, with a nominal book value,  were  exchanged for 923,600 common shares of
Cypress which had a fair market value of approximately $8.6 million.  During the
same quarter, the Company sold 831,240 of the Cypress common shares resulting in
a total pre-tax gain of $ 12.3  million.  The remaining  92,360  Cypress  common
shares are subject to certain  escrow  restrictions,  are not available for sale
until first  quarter of 2000 and are  carried at the  nominal  book value of the
Company's original investment in ICW.

Investments in Equity Accounted Investee
- ----------------------------------------
During the second quarter of 1999, the Company's investee,  Sierra Wireless Inc.
("Sierra Wireless"), which was accounted for under the cost method, completed an
initial public  offering  ("IPO") in Canada.  As part of this IPO, the Company's
investment in non-voting  preferred shares of Sierra Wireless were exchanged for
5.1 million common shares of Sierra  Wireless,  of which 1.7 million shares were
sold as part of the IPO for a pre-tax gain of approximately $14.5 million.

As a result of these  transactions,  at December  31,  1999,  the Company  owned
approximately  24% of the common shares of Sierra  Wireless and accounts for its
investment under the equity method. The difference between the carrying value of
the investment and the underlying  equity in net assets,  representing  negative
goodwill in the amount of $7.4 million,  is being  amortized to equity in income
of investee over a five year period.  Included in Interest and other income, net
for the year ended December 31, 1999, is equity in income of Sierra  Wireless of
$792,000.

As at December 31, 1999, the quoted market value of the Company's  investment in
Sierra Wireless was  approximately  $152.3 million.  The common shares of Sierra
Wireless held by the Company are subject to certain resale  provisions.


<PAGE>

NOTE 4. Line of Credit

At December 31, 1999,  the Company had available a revolving line of credit with
a bank under which the Company may borrow up to $15 million with interest at the
bank's  alternate  base rate  (annual rate of 8.5% at December  31,  1999).  The
Company  cannot pay cash  dividends,  or make material  divestments  without the
prior  written  consent  of the bank.  The  agreement  expires  in May 2001.  At
December 31, 1999 and December 31, 1998, there were no amounts outstanding under
this agreement.


NOTE 5. Obligations Under Capital Leases and Long-Term Debt

Obligations under capital leases and long-term debt are as follows:

                                                               December 31,
                                                        ------------------------
(in thousands)                                               1999         1998

Obligations under capital leases with interest            $ 1,254      $ 9,479
  ranging from 7.4% to 17.9%

Various notes, secured by property and equipment,           1,174          873
  payable in annual installments of approximatley
  $400,000 and with an interest rate of 12.3%
Various unsecured notes, payable in various installments        -          653
  with interest rates ranging from 0% to 9%
                                                        ----------   ----------
                                                            2,428       11,005
Less current portion                                       (1,348)      (5,111)
                                                        ----------   ----------
                                                         $  1,080     $  5,894
                                                        ==========   ==========


Future  minimum lease  payments at December 31, 1999 under capital leases are as
follows:


Year Ending December 31 (in thousands)
2000                                                     $  1,049
2001                                                          268
                                                        ----------
Total minimum lease payments                                1,317
Less amount representing imputed interest                     (63)
                                                        ----------
Present value of future minimum lease payments           $  1,254
                                                        ==========


<PAGE>


NOTE 6. Commitments and Contingencies

Operating  leases.  The Company  leases its  facilities  under  operating  lease
agreements,  which expire at various dates  through  April 30, 2006.  Total rent
expense for the years ended  December 31, 1999,  1998 and 1997 was $3.5 million,
$1.8 million and $1.3 million,  respectively.  Minimum rental  commitments under
these leases are as follows:


Year Ending December 31 (in thousands)
2000                                                     $  4,122
2001                                                        5,986
2002                                                        5,794
2003                                                        5,771
2004                                                        5,588
thereafter                                                 26,706
                                                        ----------
                                                         $ 53,967
                                                        ==========




Supply  agreements.  The Company has wafer supply agreement with two independent
foundries,  which expire in December 2000. Under these agreements, the suppliers
are obligated to provide certain  quantities of wafers per year.  Neither of the
agreements  have minimum unit volume  purchase  requirements  but the Company is
obligated  under one of the  agreements to purchase in future  periods a minimum
percentage of its total annual wafer requirements,  provided that the foundry is
able to continue to offer competitive technology, pricing, quality and delivery.

Contingencies.  In the normal course of business, the Company receives and makes
inquiries with regard to possible patent infringements.  Where deemed advisable,
the Company may seek or extend  licenses or negotiate  settlements.  Outcomes of
such  negotiations  may not be  determinable  at any  point  in  time;  however,
management does not believe that such licenses or settlements will, individually
or in the aggregate,  have a material adverse effect on the Company's  financial
position, results of operations or liquidity.


NOTE 7.  Special Shares

At December 31, 1999 and 1998, the Company maintained a reserve of 4,242,000 and
5,036,000 shares,  respectively,  of PMC common stock to be issued to holders of
LTD Special  Shares and options to purchase LTD Special  Shares.  The holders of
these  Special  Shares have the right to exchange one A Special  Share for eight
shares of the Company's common stock, and one B Special Share for 2.18448 shares
of the Company's common stock.

These Special Shares of LTD are classified outside of stockholders' equity until
such shares are exchanged for PMC common stock.  Upon exchange,  amounts will be
transferred  from the LTD Special Shares  account to the Company's  common stock
and additional paid-in capital on the consolidated balance sheet.



<PAGE>


NOTE 8. Stockholders' Equity

Authorized.  On July 10, 1997,  the Company was  reincorporated  in the State of
Delaware from the State of California. Prior to the reincorporation, the Company
had authorized capital of 55,405,916 shares, 50,000,000 of which were designated
"Common  Stock",  5,000,000  of which were  designated  "Preferred  Stock",  and
405,916 of which were  designated  "Series D Preferred  Stock".  All  authorized
shares  had  no  par  value.  After  the  reincorporation,  the  Company  had an
authorized  capital of 55,000,000  shares,  50,000,000 of which were  designated
"Common  Stock",  $0.001  par value,  and  5,000,000  of which  were  designated
"Preferred  Stock",  $0.001 par value.  The  excess of the  amount  recorded  as
capital  stock over the par value of capital stock on  reincorporation  has been
recorded as  additional  paid in capital at December  31,  1997.  The issued and
outstanding shares immediately before and after the reincorporation remained the
same. The reincorporation  included no other significant changes with respect to
shares outstanding,  reserved shares and various applicable options,  rights and
warrants.

During 1998 and 1999,  the Company's  stockholders  elected to add an additional
50,000,000 and 100,000,000 authorized shares of common stock,  respectively,  to
the 50,000,000 shares of common stock authorized at the end of 1997. The Company
currently has an authorized capital of 205,000,000 shares,  200,000,000 of which
are  designated  "Common  Stock",  $0.001 par value,  and 5,000,000 of which are
designated "Preferred Stock", $0.001 par value.

Stock  Splits.  In April  1999,  the  Company's  Board of  Directors  approved a
two-for-one  split of the Company's common stock in the form of a stock dividend
that was applicable to  shareholders  of record on April 30, 1999, and effective
on May 14, 1999.

In January 2000, the Company's Board of Directors  approved another  two-for-one
split of the  Company's  common stock in the form of a stock  dividend  that was
applicable  to  shareholders  of record on January 31,  2000,  and  effective on
February 14, 2000.

All  references to share and per share data for all periods  presented have been
adjusted to give effect to effect to these two-for-one stock splits.

Warrants.  During 1996, the Company issued a warrant to purchase  100,000 shares
of common stock at $2.31 per share to an  investment  banking firm in settlement
for services previously expensed.  The warrant expires in August 2000. In August
1999, as a result of the Company's  acquisition  of Abrizio,  Inc.,  the Company
assumed  warrants to purchase 174,580 shares of common stock at $1.66 per share.
At the end 1999,  warrants  to  purchase  84,278  shares of  common  stock  were
outstanding.



<PAGE>


NOTE 9. Employee Benefit Plans

Employee Stock  Purchase  Plan. In 1991,  the Company  adopted an Employee Stock
Purchase Plan ("ESPP")  under Section 423 of the Internal  Revenue Code. A total
of 6,497,012  shares of common stock have been  reserved for issuance  under the
Plan.  Under this Plan,  eligible  employees  may  purchase a limited  amount of
common  stock at a minimum  of 85% of the market  value at certain  plan-defined
dates.

During  1999,  1998 and 1997,  respectively,  there were  229,518,  385,716  and
420,596 shares issued under the Plan at weighted-average  prices of $8.12, $3.07
and $2.60, respectively, per share. The weighted-average fair value of the 1999,
1998 and 1997 awards was $9.32, $2.86 and $1.74 per share, respectively.  During
1999, the Company's stockholders authorized an additional 1,257,012 shares to be
available under the plan. As of December 31, 1999,  there were 2,221,994  shares
of common stock available for issuance under the purchase plan.

During 1998, the Company's  stockholders elected to add a provision to the ESPP.
Under the new  terms,  the  number  of shares  authorized  to be  available  for
issuance under the plan shall be increased automatically on January 1, 1999, and
every year  thereafter  until the  expiration of the plan.  The increase will be
limited to the lesser of (i) 1% of the  outstanding  shares on January 1 of each
year, (ii) 2,000,000 shares, or (iii) an amount to be determined by the Board of
Directors.

Stock  Option  Plans.  The Company  has two main stock  option  plans:  the 1987
Incentive Stock Plan and the 1994 Incentive Stock Plan. These plans cover grants
of options to purchase the Company's common stock. The options  generally expire
within five to ten years and vest over four years.

During 1998, the Company's common stockholders elected to add a provision to the
1994 Incentive Stock Plan. Under the new terms, the number of shares  authorized
to be available for issuance under the plan shall be increased  automatically on
January 1, 1999 and every year thereafter  until the expiration of the plan. The
increase  will be limited to the lesser of (i) 4% of the  outstanding  shares on
January  1 of each  year,  (ii)  8,000,000  shares,  or  (iii) an  amount  to be
determined by the Board of Directors.

In addition,  the Company has, in connection  with the  acquisitions  of various
companies,  assumed the stock option  plans of each  acquired  company,  and the
related options are included in the following table.


<PAGE>

<TABLE>
<CAPTION>

Option activity under the option plans was as follows:

                                                                                              Weighted
                                                                                               Average
                                                 Options Available     Number of Options    Exercise Price
                                                    For Issuance          Outstanding          Per Share
                                                 ------------------    -----------------     -------------


Outstanding at December 31, 1996 (5,011,496
    options exercisable at a weighted average
<S>          <C>                                       <C>                   <C>               <C>
    price of $1.86)                                    6,114,196             12,396,088        $  2.66
    Authorized                                         3,897,642                      -             -
    Granted (weighted average fair value of
       $2.00 per share)                               (5,705,800)             5,705,800        $  4.37
    Exercised                                              -                (2,773,800)        $  1.81
    Expired                                             (144,448)                     -             -
    Cancelled                                          1,936,864            (1,936,864)        $  3.74
                                                    ------------          -------------

Outstanding at December 31, 1997 (5,296,692
    options exercisable at a weighted average
    price of $2.32)                                    6,098,454             13,391,224        $  3.41
    Authorized                                         5,257,656                      -             -
    Granted (weighted average fair value of
       $4.08 per share)                               (7,119,544)             7,119,544        $  5.62
    Exercised                                              -                (3,208,064)        $  1.87
    Expired                                              (54,768)                     -             -
    Cancelled                                            653,564              (653,564)        $  5.49
                                                    ------------          --------------

Outstanding at December 31, 1998 (6,195,466
    options exercisable at a weighted average
    price of $3.30)                                    4,835,362             16,649,142        $  4.57
    Authorized                                         5,028,056
    Granted (weighted average fair value of
       $16.09 per share)                              (9,763,486)            9,763,486         $ 31.12
    Exercised                                                               (3,254,654)        $  2.89
    Expired                                               (2,702)                     -             -
    Cancelled                                            328,206              (328,206)        $ 12.70
                                                    -------------         --------------
Outstanding at December 31, 1999                         425,436             22,829,768        $ 16.04
                                                    =============         ==============

</TABLE>




<PAGE>
<TABLE>
<CAPTION>


The following table summarizes  information  concerning options  outstanding for
the combined option plans at December 31, 1999:



                                            Options Outstanding                              Options Exercisable
                           -----------------------------------------------------     ----------------------------------
                                            Weighted Average
                                               Remaining           Weighted                               Weighted
                                              Contractual          Average                                Average
    Range of Exercise          Number             Life             Exercise               Number          Exercise
         Prices              Outstanding         (years)         Price per share        Exercisable    Price per share
  ---------------------      -----------    ----------------    ----------------     ---------------   ----------------

<S>          <C>              <C>                 <C>            <C>                     <C>              <C>
  $   0.02 - $   3.53         4,926,464           7.02           $    2.11               2,890,980        $ 2.65
  $   3.57 - $   6.25         3,625,274           6.62                4.11               2,792,114          4.12
  $   6.35 - $  14.05         4,902,522           8.11                8.21               2,059,532          8.02
  $  15.99 - $  23.97         5,301,900           9.10               17.37                       0          0.00
  $  32.21 - $  53.07         4,073,608           9.93               51.21                       0          0.00
                            -----------                                               --------------
  $  0.02 -  $ 53.07         22,829,768           8.19               16.04               7,742,626          4.61
                            ===========                                               ==============

</TABLE>

Stock-based  compensation.  In accordance  with the  provisions of SFAS No. 123,
"Accounting for Stock-Based  Compensation" ("SFAS 123"), the Company applies APB
Opinion 25 and related interpretations in accounting for its stock-based awards.
The Company's  ESPP is  non-compensatory  under APB Opinion 25. The Company also
does not recognize  compensation  expense for employee stock options,  which are
granted with  exercise  prices  equal to the fair market value of the  Company's
common stock at the date of grant.

Pro forma  information  regarding  net income  (loss) and net income  (loss) per
share is required by SFAS 123 for awards  granted or modified after December 31,
1994 as if the Company had  accounted  for its  stock-based  awards to employees
under  the fair  value  method  of SFAS  123.  The fair  value of the  Company's
stock-based  awards to employees  was  estimated  using a  Black-Scholes  option
pricing model. The Black-Scholes option valuation model was developed for use in
estimating  the fair value of traded  options that have no vesting  restrictions
and are fully  transferable.  In addition,  the Black-Scholes model requires the
input of highly  subjective  assumptions  including  the  expected  stock  price
volatility.   Because  the  Company's   stock-based  awards  to  employees  have
characteristics  significantly  different  from  those of  traded  options,  and
because changes in the subjective  input  assumptions can materially  affect the
fair  value  estimate,  in  management's  opinion,  the  existing  models do not
necessarily  provide  a  reliable  single  measure  of  the  fair  value  of its
stock-based  awards to employees.  The fair value of the  Company's  stock-based
awards  to  employees  was  estimated  using  the  multiple   option   approach,
recognizing  forfeitures as they occur, assuming no expected dividends and using
the following weighted average assumptions:


<PAGE>


<TABLE>
<CAPTION>

                                                  Options                               ESPP
                                       -------------------------------      ------------------------------
<S>                                      <C>        <C>        <C>            <C>        <C>        <C>
                                         1999       1998       1997           1999       1998       1997
                                         ----       ----       ----           ----       ----       ----
Expected life (years)                     3.4        3.4        2.6            1.4        1.5        1.4
Expected volatility                       0.7        0.7        0.7            0.7        0.7        0.8
Risk-free interest rate                   5.4%       5.2%       6.0%           5.2%       5.2%       5.9%

</TABLE>


If the computed fair values of 1999,  1998 and 1997 awards had been amortized to
expense  over the vesting  period of the awards as  prescribed  by SFAS 123, net
income (loss) and net income (loss) per share would have been:

(in thousands except per share amounts):
                                          1999        1998       1997
                                        -------    --------    --------
Net income (loss)                       $64,699    $(17,500)    $29,654
Basic net income (loss) per share          0.47       (0.13)       0.24
Diluted net income (loss) per share        0.43       (0.13)       0.23

The pro forma  disclosures  above include the effect of SFAS 128 relating to the
calculation  of net income per share and FASB  Technical  Bulletin  97-1,  which
clarified the  application of SFAS 123 to the estimation of fair value of awards
under ESPP plans with a multiple year look-back feature.

Because SFAS 123 is applicable only to awards granted or modified  subsequent to
December 31, 1994,  the pro forma effect is not  indicative  of future pro forma
adjustments, when the calculation will apply to all applicable stock awards.


NOTE 10.  Income Taxes
<TABLE>
<CAPTION>


The income tax provisions,  calculated  under Statement of Financial  Accounting
Standard No. 109 ("SFAS 109"), consist of the following:

                                           Year Ended December 31,
                                  ---------------------------------------------
(in thousands)                           1999            1998             1997
Current:
<S>                                       <C>             <C>         <C>
  Federal                                 $ -             $ -         $ (1,294)
  State                                   525             190                5
  Foreign                              44,108          23,855           13,934
                                  ------------     -----------    --------------
                                       44,633          24,045           12,645
                                  ------------     -----------    --------------
Deferred:
  Federal                                (132)          (132)            1,671
  Foreign                              (2,898)        (1,040)            1,411
                                  ------------    -----------     --------------
                                       (3,030)        (1,172)            3,082
                                  ------------     ----------     --------------
Provision for income taxes           $ 41,603       $ 22,873          $ 15,727
                                  ============    ===========     ==============

</TABLE>


<PAGE>


A reconciliation  between the Company's  effective tax rate and the U.S. Federal
statutory rate is as follows:

<TABLE>
<CAPTION>

                                                                            Year Ended December 31,
                                                                ------------------------------------------------
(in thousands)                                                            1999            1998             1997

<S>                                                                   <C>             <C>              <C>
Income (loss) before provision for income taxes                       $131,623        $ 16,928         $ 49,911
Federal statutory tax rate                                                 35%             35%              35%
Income taxes (recovery) at U.S. Federal statutory rate                $ 46,068         $ 5,925         $ 17,469
State taxes, net of federal benefit                                        525               -                -
Net operating losses (utilized) not utilized                            (5,805)          1,002           (4,482)
In-process research and development costs
  relating to IGT acquisition                                                -          13,214                -
In-process research and development costs
  relating to other acquisitions                                             -             497                -
Impairment of intangible assets                                              -           1,509                -
Incremental taxes on foreign earnings                                     (698)            234            2,258
Other                                                                    1,513             492              482
                                                                ---------------  -------------    --------------
Provision for income taxes                                            $ 41,603        $ 22,873         $ 15,727
                                                                ===============  ==============   ==============





Significant  components of the Company's deferred tax assets and liabilities are
as follows:

                                                           December 31,
                                                    -------------------------
(in thousands)                                          1999             1998
Deferred tax assets:
Net operating loss carryforwards                    $ 53,519         $ 23,968
State tax loss carryforwards                           3,690            1,500
Credit carryforwards                                   5,107            3,497
Reserves and accrued expenses                          4,585              430
Restructuring and other charges                          372            3,245
Deferred income                                        9,270            1,506
                                                    ----------    -----------
Total deferred tax assets                             76,543           34,146
Valuation allowance                                  (67,273)         (32,640)
                                                    ----------    ------------
Total net deferred tax assets                          9,270            1,506
                                                    ----------    ------------
Deferred tax liabilities:
Depreciation                                          (8,885)         (4,015)
Capitalized technology                                  (206)           (342)
                                                    ----------    -----------
Total deferred tax liabilities                        (9,091)         (4,357)
                                                    ----------    -----------
Total net deferred taxes                               $ 179        $ (2,851)
                                                    ==========    ===========

</TABLE>

<PAGE>

At December 31, 1999, the Company has approximately  $157,139,000 of federal net
operating  losses,  which will expire from 2000 to 2019.  Include in the federal
net  operating  losses is  $13,726,000  which is subject to a limitation  due to
ownership change limitations  provided by the Internal Revenue Code of 1986. The
Company  also has  approximately  $67,591,000  of state tax loss  carryforwards,
which expire from 2001 to 2013. The utilization of these state losses is subject
to a limitation  due to  ownership  change  limitations  provided by the various
state income tax legislation.

Included in the credit  carryforwards  are  $2,258,000  of federal  research and
development  credits,  which will  expire  from 2000 to 2012,  $628,000 of state
manufacturer's  investment credits which expire from 2002 to 2006, $1,767,000 of
foreign tax credits  which expire from 2000 to 2003,  $41,000 of state  research
and development  credits and $410,000 of federal AMT credits which  carryforward
indefinitely.

Not included in the deferred assets are approximately  $39,547,000 of cumulative
tax  deductions  related to equity  transactions,  the  benefit of which will be
credited  to  stockholders'  equity,  if and when  realized  after the other tax
deductions in the carryforwards have been realized.

The pretax income from foreign operations was $119,262,000 in 1999,  $62,355,000
in 1998 and $37,391,000 in 1997. Undistributed earnings of the Company's foreign
subsidiaries  are considered to be indefinitely  reinvested and,  accordingly no
provision  for federal and state income taxes have been provided  thereon.  Upon
distribution  of those  earnings  in the form of a dividend  or  otherwise,  the
Company would be subject to both US income taxes  (subject to an adjustment  for
foreign tax  credits)  and  withholding  taxes  payable to the  various  foreign
countries.  It is not practical to estimate the income tax liability  that might
be incurred on the remittance of such earnings.


NOTE 11.  Segment Information

The Company has two operating segments:  networking and non-networking products.
The networking  segment consists of  internetworking  semiconductor  devices and
related  technical  service and support to  equipment  manufacturers  for use in
their  communications  and  networking  equipment.  The  non-networking  segment
includes user interface products such as custom, modem and other semiconductors.
The Company is supporting these products for existing customers, but has decided
not to develop any further products of this type.

The accounting  policies of the segments are the same as those  described in the
summary of significant  accounting policies.  The Company evaluates  performance
based on gross margins from operations of the two segments.



<PAGE>


Summarized financial information by segment is as follows:



                                        Year Ended December 31,
                            ------------------------------------------------
(in thousands)                      1999            1998            1997
Net revenues

Networking                      $ 245,186       $ 139,539       $  85,512
Non-Networking                     17,291          22,273          41,654
                            --------------  --------------  --------------
Total                           $ 262,477       $ 161,812       $ 127,166
                            ==============  ==============  ==============


Gross profit

Networking                      $ 199,186       $ 113,063       $  69,529
Non-Networking                      7,928          10,529          24,572
                            --------------  --------------  --------------
Total                           $ 207,114       $ 123,592       $  94,101
                            ==============  ==============  ==============

Enterprise-wide  information is provided in accordance with SFAS 131. Geographic
revenue  information  is  based  on  the  location  of  the  customer  invoiced.
Long-lived assets include property and equipment,  goodwill and other intangible
assets, investments and other assets and deposits for wafer fabrication capacity
and is based on the physical location of the assets.

                                        Year Ended December 31,
                             -----------------------------------------------
(in thousands)                      1999            1998            1997
Net revenues
United States                   $ 181,161       $ 110,256       $  89,371
Canada                             38,575          15,780          12,373
Europe and Middle East             14,764          12,431          11,430
Asia                               27,789          23,246          13,693
Other foreign                         188              99             299
                             -------------   --------------  --------------
Total                           $ 262,477       $ 161,812       $ 127,166
                             =============   ==============  ==============


Long-lived assets
United States                   $  30,342        $ 36,796        $ 26,581
Canada                             56,577          38,865          29,297
Other                                 689              40               -
                             -------------   -------------   --------------
Total                           $  87,608        $ 75,701        $ 55,878
                             =============   =============   ==============


The Company has revenues from external  customers  (1999 and 1998 - 2, 1997 - 1)
that exceed 10% of total net revenues as follows:


                                        Year Ended December 31,
                            ------------------------------------------------
(in thousands)                      1999            1998            1997

Networking                      $ 98,050         $ 31,549        $  1,757
Non-Networking                         -           18,579          21,403




<PAGE>


NOTE 12.  Restructuring

On September 29, 1996, the Company recorded a restructuring charge in connection
with the  Company's  decision to exit from the modem  chipset  business  and the
associated restructuring of the Company's non-networking product operations.  In
1997,  the company  recorded a recovery of  $1,383,000  from the reversal of the
excess   accrued   restructuring   charge  related  to  the  completion  of  the
restructuring.  There  were  no  additional  amounts  incurred  related  to this
restructuring in 1999 and 1998.


NOTE 13.  Net Income (Loss) Per Share

<TABLE>
<CAPTION>

The following  table sets forth the  computation of basic and diluted net income
(loss) per share:


                                                                                      December 31,
                                                                      ---------------------------------------
<S>                                                                        <C>            <C>           <C>
                                                                           1999           1998          1997
Numerator:
  Net income (loss)                                                     $ 90,020      $ (5,945)      $ 34,184
                                                                       ----------    ----------    ----------

Denominator:
  Basic weighted average common shares outstanding (1)                   137,428       130,760        124,756
  Effect of dilutive securities:
  Stock options                                                           13,590             -          6,310
  Stock warrants                                                             116             -             56
                                                                       ----------     ---------    ----------
  Diluted weighted average common shares outstanding                     151,134       130,760        131,122
                                                                       ==========     =========    ==========

Basic net income (loss) per share                                         $ 0.66       $ (0.05)        $ 0.27
                                                                       ==========    ==========    ==========
Diluted net income (loss) per share                                       $ 0.60       $ (0.05)        $ 0.26
                                                                       ==========    ==========    ==========


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

</TABLE>



<PAGE>


NOTE 14.  Subsequent Event

In January 2000, the Company acquired Toucan Technology ("Toucan"),  a privately
held integrated circuit design company located in Ireland. At December 31, 1999,
the  Company  owned seven per cent of Toucan and  purchased  the  remainder  for
approximately  300,000 shares of PMC Common Stock and options to purchase Common
Stock. The acquisition will be accounted as a pooling of interests.

On March 3, 2000, the Company acquired AANetcom, Inc. ("AANetcom"),  a privately
held fabless  semiconductor  located in the USA. The Company  issued 4.8 million
PMC common shares in exchange for all outstanding stock and options of AANetcom.
The transaction will be accounted for as a pooling of interests.

On March 3, 2000,  the  Company  also  announced  the intent to acquire  Extreme
Packet Devices, Inc. ("Extreme"), a privately held fabless semiconductor company
located in Canada.  This agreement  provides for the Company to issue PMC common
shares  valued at $415 million (US) in exchange  for all  outstanding  stock and
options  of  Extreme.  This  transaction,  subject to  completion,  will also be
accounted for as a pooling of interests.

The pro forma effects of these  combinations on the reported  financial position
and the results of operation are not presented in this document.


<PAGE>



                                    PART III

ITEM  9.  Changes  in and  Disagreements  with  Accountants  on  Accounting  and
Financial Disclosure.

Not applicable.


ITEM 10.  Directors and Executive Officers of the Registrant

The  information  concerning  the Company's  directors  required by this Item is
incorporated  by reference to the Company's  Proxy Statement for its 2000 Annual
Meeting  of  Stockholders   ("Proxy   Statement").   The  following  sets  forth
information regarding executive officers of the Company as of March 14, 2000.

       Name            Age                 Position
- -----------------     ----    --------------------------------------------------
Robert L. Bailey       42       Chairman of the Board of Directors, President
                                and Chief Executive Officer
Greg Aasen             44       Chief Operating Officer
John W. Sullivan       53       Vice President, Finance and Chief Financial
                                Officer

Officers serve at the discretion of the Board of Directors.  There are no family
relationships between any of the directors or officers of the Company.

Mr.  Bailey has served as  Director  of the Company  since  October  1996 and as
President and Chief Executive  Officer since July 1997 and Chairman of the Board
of Directors since February 2000. In prior years,  Mr. Bailey acted as President
and Chief  Executive  Officer of PMC-Sierra,  Ltd. Prior to joining the Company,
Mr.  Bailey was employed by  AT&T-Microelectronics  from August 1989 to November
1993, where he served as Vice President of Integrated  Microperipheral Products.
Mr.  Bailey was formerly  employed by Texas  Instruments  in various  management
assignments from June 1979 to August 1989.

Mr. Aasen has served as Chief  Operating  Officer of the Company since  February
1997.  Mr.  Aasen is a  founder  of  PMC-Sierra,  Ltd.  and  served as its Chief
Operating  Officer and Secretary since its formation in June 1992. He has served
as a director of PMC-Sierra, Ltd. since August 1994. Prior to joining PMC-Sierra
Ltd., Mr. Aasen was a General Manager of PMC, a division of MPR Teltech, Ltd.

Mr.  Sullivan  joined the Company in April 1997 as Vice  President,  Finance and
Chief  Financial  Officer.  Prior to joining  the  Company,  he was  employed by
Semitool Inc., a semiconductor equipment  manufacturer,  as VP Finance from 1993
to 1997.  Prior to his employment  with Semitool Inc., Mr. Sullivan was employed
by United Dominion Industries and Arthur Young & Company.



<PAGE>


ITEM 11.  Executive Compensation.

The  information  required  by this Item is  incorporated  by  reference  to the
Company's Proxy Statement.


ITEM 12.  Security Ownership of Certain Beneficial Owners and Management.

The  information  required  by this Item is  incorporated  by  reference  to the
Company's Proxy Statement.


ITEM 13.  Certain Relationships and Related Transactions.

The  information  required  by this Item is  incorporated  by  reference  to the
Company's Proxy Statement.


                                     PART IV


ITEM 14.  Exhibits, Financial Statement Schedules and Reports on Form 8-K.

(a)      1.  Consolidated Financial Statements
             ---------------------------------
             The financial  statements  (including the notes thereto)  listed in
             the  accompanying  index  to  financial  statements  and  financial
             statement  schedules  are filed  within this Annual  Report on Form
             10-K.

         2.  Financial Statement Schedules
             -----------------------------
             The  financial   statement  schedule  listed  on  page  36  in  the
             accompanying index to financial  statements and financial statement
             schedule is filed within this Annual Report on Form 10-K.

         3.  Exhibits
             --------
             The exhibits listed under Item 14(c) are filed as part of this Form
             10-K Annual Report.

(b)      Reports on Form 8-K
         -------------------
         No reports on Form 8-K were filed by the Company in the  quarter  ended
         December 31, 1999.



<PAGE>

(c)  Exhibits pursuant to Item 601 of Regulation S-K.
     ------------------------------------------------
<TABLE>

<CAPTION>
       Exhibit                          Description                                         Page
       Number                                                                               Number
      -------  -----------------------------------------------------------------           --------
         <S>   <C>                                                                            <C>
         2.1   Exchange Agreement dated September 2, 1994 between the Company and             (C)
               PMC-Sierra, Ltd.
         2.2   Amended and Restated Shareholders' Agreement dated September 2, 1994           (C)
               among the Shareholders of PMC-Sierra, Inc.
         2.3   Amendment to Exchange Agreement effective August 9, 1995                       (F)
         2.4   Agreement and Plan of Reorganization dated as of April 15, 1998 by and         (O)
               among PMC-Sierra, Inc., Integrated Telecom Technology, Inc., PMC-Sierra
               (Maryland), Inc. and Samsung Electronics Co., Ltd.
         3.1   Certificate of Incorporation                                                   (I)
        3.1A   Certificate of Amendment to the Certificate of Incorporation                   (N)
               filed June 13, 1997
        3.1B   Certificate of Amendment to the Certificate of Incorporation                   (N)
               filed July 11, 1997
        3.1C   Certificate of Amendment to Certificate of Incorporation of PMC-Sierra,        (P)
               Inc. filed on June 4, 1998.
        3.1D   Certificate of Amendment to Certificate of Incorporation of PMC-Sierra,        (S)
               Inc. filed on July 14, 1999.
         3.2   Bylaws, as amended                                                             (Q)
         4.1   Specimen of Common Stock Certificate                                           (K)
         4.3   Terms of PMC-Sierra, Inc. Special Shares                                       (D)
       10.1B   1987 Incentive  Stock Plan, as amended (B)
        10.2   1991 Employee Stock Purchase plan, as amended (Q)
        10.4   Form of Indemnification  Agreement  between  the  Company and its
               directors (H) and officers
        10.8   Warrants to Purchase Common Stock                                              (A)
       10.8B   Warrant Purchase Agreement and Warrants to Purchase Shares of Common           (J)
               Stock dated August 28, 1996
       10.17   PMC-Sierra, Inc. 1994 Incentive Stock Plan                                     (E)
       10.18   Deposit Agreement with Chartered Semiconductor Pte. Ltd.*                      (G)
      10.18B   Amendment Agreement (No. 1) to Deposit Agreement with Chartered                (J)
               Semiconductor Pte. Ltd.*
       10.21   PMC-Sierra Inc. (Portland) 1996 Stock Option Plan                              (P)
       10.22   Net Building Lease (PMC-Sierra, Ltd.), dated May 15, 1996                      (J)

<PAGE>


       10.23   Revolving Operating Line of Credit Agreement between PMC-Sierra, Inc.          (S)
               and CIBC Inc. dated 11th day of June 1999.
       10.24   Revolving Operating Line of Credit Agreement between PMC-Sierra, Ltd.          (S)
               And CIBC dated 11th day of June 1999.
       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.                                                                          (P)
       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.                                                                 (P)
       10.27   Guarantee Agreement between PMC-Sierra, Inc. and CIBC dated 27th day of        (P)
               April, 1998.
       10.28   1998 PMC-Sierra (Maryland), Inc. Stock Option Plan                             (P)
       10.30   Abrizio Inc. 1997 Stock Option Plan                                            (T)
       10.31   Forecast and Option Agreement among PMC-Sierra, Inc., PMC-Sierra, Ltd.,
               and Taiwan Semiconductor Manufacturing Corporation*                             --
       10.32   Executive Employment Agreement among PMC-Sierra, Inc. and Robert L.             --
               Bailey
       10.33   Executive Employment Agreement among PMC-Sierra, Inc. and Gregory Aasen         --
       10.34   Executive Employment Agreement among PMC-Sierra, Inc. and John W.               --
               Sullivan
        11.1   Calculation of earnings per share                                              (M)
        16.1   Letter regarding change in certifying accountant                               (L)
        21.1   Subsidiaries                                                                    --
        23.1   Consent of Deloitte & Touche LLP, Independent Auditors                          --
        24.1   Power of Attorney                                                              (Q)

* Confidential treatment has been requested as to a portion of this exhibit.
<FN>

(A)          Incorporated   by  reference  from  the   same-numbered
             exhibit  filed  with  the   Registrant's   Registration
             Statement on Form S-1 (No. 33-39406).

<PAGE>

(B)          Incorporated   by  reference  from  the   same-numbered
             exhibit  filed with the  Registrant's  Form 10-K Annual
             Report for the fiscal year ended January 3, 1993.
(C)          Incorporated   by  reference  from  the   same-numbered
             exhibit filed with the  Registrant's  Current Report on
             Form 8-K, filed on September 16, 1994, as amended.
(D)          Incorporated by reference from exhibit 4 of the Schedule
             13-D filed on November 2, 1994 by GTE Corporation.
(E)          Incorporated   by  reference  from  the  same  numbered
             exhibit  filed with the  Registrant's  Form 10-K Annual
             Report for the fiscal year ended January 2, 1994.
(F)          Incorporated  by reference  from exhibit 2.1 filed with
             Registrant's  Current  Report  on Form  8-K,  filed  on
             September 6, 1995, as amended on October 6, 1995.
(G)          Incorporated   by  reference  from  the  same  numbered
             exhibit  filed with the  Registrant's  Form 10-K Annual
             Report for the fiscal year ended December 31, 1995.
(H)          Incorporated by reference from exhibit 10.21 filed with
             Registrant's  Form 10-Q for the quarter  ended June 30,
             1997.
(I)          Incorporated by reference from exhibit 3.1 filed with
             Registrant's Form 10-Q for the quarter ended June 30, 1997.
(J)          Incorporated   by  reference  from  the  same  numbered
             exhibit  filed with the  Registrant's  Form 10-K Annual
             Report for the fiscal year ended December 31, 1996.
(K)          Incorporated by reference from exhibit 4.4 filed with the
             Registrant's Current Report on Form 8-K, filed on August 29, 1997.
(L)          Incorporated  by reference from exhibit 16.1 filed with
             the  Registrant's  Current Report on Form 8-K, filed on
             April 18, 1997.
(M)          Refer to Note 12 of the financial  statements  included in
             Item 8 of Part II of this Annual  Report.
(N)          Incorporated  by reference  from the same numbered
             exhibit filed with the Registrant's Form 10-K Annual
             Report for the fiscal year ended December 31, 1997.
(O)          Incorporated  by reference  from exhibit 2.1 filed with
             the  Registrant's  Current Report on Form 8-K, filed on
             June 3, 1998.
(P)          Incorporated   by  reference  from  the  same  numbered
             exhibit filed with the Registrant's Form 10-Q Quarterly
             Report for the quarterly period ended June 28, 1998.
(Q)          Incorporated by reference from Signatures page of this Annual
             Report.
(R)          Incorporated   by  reference  from  the  same  numbered
             exhibit  filed with the  Registrant's  Form 10-K Annual
             Report for the fiscal year ended December 27, 1998.
(S)          Incorporated   by  reference  from  the  same  numbered
             exhibit filed with the Registrant's Form 10-Q Quarterly
             Report for the quarterly period ended June 27, 1999.
(T)          Incorporated   by  reference  from  the  same  numbered
             exhibit filed with the Registrant's Form 10-Q Quarterly
             Report for the  quarterly  period ended  September  28,
             1999.
</FN>
</TABLE>


<PAGE>


(d)       Financial Statement Schedules required by this item are listed on page
          __ in the accompanying index to the financial statements.




<PAGE>


                                   SIGNATURES

Pursuant to the  requirements of Section 13 or 15(d) 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:  March 17, 2000                  /s/ Robert L. Bailey
                                       -----------------------------------------
                                       Robert L. Bailey, Chief Executive Officer


                                POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE  PRESENTS,  that each person whose  signature  appears
below  constitutes and appoints  Robert L. Bailey and John W. Sullivan,  jointly
and severally, his attorneys-in-fact,  each with the power of substitution,  for
him in any and all  capacities,  to sign any  amendments  to this Report on Form
10-K,  and to file the  same,  with  exhibits  thereto  and other  documents  in
connection  therewith,  with the  Securities  and  Exchange  Commission,  hereby
ratifying  and  confirming  all  that  each  of said  attorneys-in-fact,  or his
substitute or substitutes, may or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual
Report  has  been  signed  below  by the  following  persons  on  behalf  of the
Registrant and in the capacities and on the dates indicated.

     Name                      Title                                Date

/s/ James V. Diller      Chairman of the Board and Director     March 17, 2000
James V. Diller

/s/ Robert L. Bailey     Director and Chief Executive Officer   March 17, 2000
Robert L. Bailey

/s/ John W. Sullivan     Vice President Finance, Chief          March 17, 2000
John W. Sullivan         Financial Officer (and
                         Principal Accounting Officer)

/s/ Colin Beaumont       Director                               March 17, 2000
Colin Beaumont

/s/ Frank Marshall       Director                               March 17, 2000
Frank Marshall

/s/ Alexandre Balkanski  Director                               March 17, 2000
Alexandre Balkanski

<PAGE>


 SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS


                  Years ended December 31, 1999, 1998 and 1997
                                 (in thousands)

                               Allowance for Doubtful Accounts

                            Additions      Additions
  Year      Balance at      charged to     charged to
           beginning of     costs and       other                     Balance at
              year           expenses      accounts     Write-offs   end of year

  1999      $ 1,128           130             -              14        $ 1,244
  1998      $ 1,070           241             -             183        $ 1,128
  1997      $   842           500             -             272        $ 1,070



<PAGE>


                                INDEX TO EXHIBITS

Exhibit                 Description                                     Page
Number                                                                  Number
- -------  ----------------------------------------------------           ------

 10.31   Forecast and Option Agreement among PMC-Sierra, Inc.,            --
         PMC-Sierra, Ltd.and Taiwan Semiconductor
         Manufacturing Corporation*
 10.32   Executive Employment Agreement among PMC-Sierra, Inc.            --
         and Robert L. Bailey
 10.33   Executive Employment Agreement among PMC-Sierra, Inc.            --
         and Gregory Aasen
 10.34   Executive Employment Agreement among PMC-Sierra, Inc.            --
         and John W.Sullivan

 21.1    Subsidiaries                                                     --

 23.1    Consent of Deloitte & Touche LLP, Independent Auditors           --

 27      Financial Data Schedule                                          --


* Confidential treatment has been requested as to a portion of this exhibit.




FORECAST AND OPTION AGREEMENT
Between
PMC-Sierra Corporation
And
PMC-Sierra Ltd.
And
Taiwan Semiconductor Manufacturing Co., Ltd.
October 14, 1999



*Confidential  portions have been omitted pursuant to a request for confidential
treatment and have been filed separately with the Commission.
<PAGE>



                                TABLE OF CONTENTS

1.   TERMINATION OF THE OPTION AGREEMENTS..............................3
2.   DEFINITIONS.......................................................4
3.   VOLUME and forecast COMMITMENT....................................4
4.   WAFER PRICE.......................................................5
5.   OTHER PURCHASE TERMS AND CONDITIONS...............................5
6.   FAILURE TO PURCHASE THE CUSTOMERS COMMITTED CAPACITY;
     FIRST RIGHT OF REFUSAL............................................6
7.   TERM AND TERMINATION..............................................6
8.  LIMITATION OF LIABILITY............................................7
9.      NOTICE.........................................................7
10.     ENTIRE AGREEMENT...............................................8
11.     GOVERNING LAW..................................................8
12.     ARBITRATION....................................................8
13.     ASSIGNMENT.....................................................9
14.     CONFIDENTIALITY................................................9
15.     FORCE MAJEURE..................................................9
16.     OBLIGATION OF FUTURE PURCHASE..................................9
Exhibit A.............................................................11
Exhibit B.............................................................12


<PAGE>

                          FORECAST AND OPTION AGREEMENT

      THIS TRI-PARTY  AGREEMENT is made and becomes  effective as of October 14,
1999(the "Effective Date") between:

     1.  Taiwan  Semiconductor  Manufacturing  Co.,  Ltd.  ("TSMC"),  a  company
         organized  under the laws of the Republic of China with its  registered
         address  at No.  121,  Park  Ave.  3,  Science-Based  Industrial  Park,
         Hsinchu, Taiwan;

     2.  PMC-Sierra Inc.  ("PMC-Sierra"),  a company organized under the laws of
         Delaware,  with  its  registered  address  at  105-8555  Baxter  Place,
         Burnaby,  British Columbia,  Canada,  V5A 4V7, formerly known as Sierra
         Semiconductor  Corporation,  a  company  organized  under  the  laws of
         California,  with the registered  address at 2222 Qume Drive, San Jose,
         CA 95131; and

     3.  PMC-Sierra Ltd, a company organized under the laws of British Columbia,
         with its registered address at 105-8555 Baxter Place, Burnaby,  British
         Columbia, Canada V5A 4V7, formerly known as PMC-Sierra, Inc., a company
         organized under the laws of Canada, with the same registered address as
         PMC-Sierra Ltd.

RECITALS


      WHEREAS  PMC-Sierra and PMC-Sierra Ltd.  understand that both entities are
jointly and  severally  obligated to all terms and  conditions  specified  under
"Customers" and are collectively referred to as "Customers" herein;

      WHEREAS TSMC currently  supplies  Customers with wafers and Customers wish
to increase the volume of wafers to be purchased from TSMC;


       WHEREAS  the  parties  wish to  terminate  the Option  Agreement  and the
Amendment  to  Option  Agreement  dated  November  6,  1996 and  July  21,  1997
respectively.


AGREEMENT

      NOW,  THEREFORE,  in  consideration of the mutual covenants and conditions
contained herein, the parties agree as follows:


1.    TERMINATION OF THE OPTION AGREEMENTS

The parties  agree to  terminate  the Option  Agreement  dated  November 6, 1996
between  Sierra  Semiconductor  Corporation  and  PMC-Sierra  and  TSMC  and the
Amendment to Option  Agreement  dated July 21, 1997 upon the Effective Date. The
Parties agree that any rights and  obligations  accrued prior to the termination
shall remain in effective except the option fees due thereunder.

<PAGE>


2.    DEFINITIONS

    (a)  "Base  Capacity"  used in this  Agreement  shall mean the capacity that
         TSMC agrees to provide, and Customers agree to purchase, in addition to
         the Option Capacity, pursuant to this Agreement.

    (b)  "Customers Committed Capacity" used this Agreement shall mean the total
         capacity  that  Customers  agree to purchase from TSMC pursuant to this
         Agreement, and is set forth in Exhibit A.

    (c)  "Option  Capacity" used in this Agreement  shall mean the firm capacity
         commitment  made by  Customers  pursuant to this  Agreement,  for which
         Capacity  Customers agrees to pay TSMC a deposit in the amount of * per
         physical Wafer.

    (d)  "Option Fee" used in this Agreement shall mean the deposit, * in total,
         that Customers have placed with TSMC.

    (e)  "TSMC  Committed  Capacity" used in this Agreement shall mean the total
         capacity  that TSMC  agrees to provide to  Customers  pursuant  to this
         Agreement, and is set forth in Exhibit A.

    (f)  "Wafer"  used in this  Agreement  shall  mean the  number  of  physical
         wafers. Any and all capacity  commitments referred to in this Agreement
         shall be measured in physical Wafers.

3. VOLUME AND FORECAST COMMITMENT

(a)      Monthly Forecast. Customers agree to provide to TSMC on a monthly basis
         a six-month  rolling  forecast  of the number of wafers that  Customers
         will  purchase,  with the  committed  volume  for the  first  three (3)
         months.  That is, Customers must purchase all of the quantity  forecast
         for the  delivery  in the first three (3) months of the  forecast.  The
         forecast must be based on wafers out or deliveries  expected to be made
         by TSMC.

(b)      Quarterly  Forecast.  Customers agree to provide to TSMC on a quarterly
         basis an  eighteen-month (6 quarters) rolling forecast of the number of
         wafers that  Customers  will  purchase.  Customers  shall commit to the
         volume quantity stated in the first quarter.  Customers shall commit to
         plus or minus ten percent (+10%) of the volume  quantity  stated in the
         second quarter.  - Customers  future forecasts shall be limited to plus
         or minus  twenty-five  percent (+25%) of the volume  quantity stated in
         the - previous forecast for next two (2) quarters.  Customer may modify
         its commitment on the remaining two (2) quarters at anytime  subject to
         TSMC's  acceptance.  The  forecast  must  be  based  on  wafers  out or
         deliveries  expected to be made by TSMC.  The last  quarterly  forecast
         preceding the end of any year,  subject to acceptance by TSMC, shall be
         used to  determine  the final  values of the Base  Capacity  and Option
         Capacity for the next calendar year for Exhibits A.

<PAGE>


(c)      Semi-Annual  Forecast.   Customers  agree  to  provide  to  TSMC  on  a
         semi-annual  basis a three (3) year  rolling  forecast of the number of
         wafers that Customers will purchase.  The parties understand that there
         is no volume commitment tied to this semi-annual  forecast and it shall
         be used for planning purposes only.



4.    WAFER PRICE

(a)      The wafer prices for the Option  Capacity shall not be more than TSMC's
         average wafer prices to other TSMC customers that are parties to option
         agreements similar to this Agreement) for the same technology, the same
         fab and the same period of time. In the event that the wafer prices for
         the  Customers  Committed  Capacity  do not comply  with the  preceding
         sentence,  TSMC will make proper price changes for the unfilled orders,
         upon Customers' notice in writing.

(b)      The parties  shall  negotiate  in good faith each year the wafer prices
         for the Option Capacity for the following year, and if no agreement may
         be reached by the parties  before  October each year, the parties agree
         to submit the dispute to the binding arbitration pursuant to Section 13
         below, and under such circumstances, neither party shall have the right
         to terminate this Agreement under Section 7 below.

5.    OTHER PURCHASE TERMS AND CONDITIONS


(a)      Customers agree to purchase from TSMC the Customers Committed Capacity.
         TSMC agrees to provide to Customers the TSMC Committed Capacity, as set
         forth in Exhibit A. The  parties  agree  that the  Customers  Committed
         Capacity and TSMC Committed  Capacity shall be apportioned as set forth
         in Exhibit A.  Customers  agree that in any calendar  year,  the orders
         placed by  Customers  shall first  apply to fulfill  the Base  Capacity
         portion  of the  Customers  Committed  Capacity,  and then  the  Option
         Capacity portion thereof

(b)      Customers have deposited a total sum of * with TSMC as set forth in the
         Option Agreement.  TSMC hereby acknowledged receipt of the total sum as
         an Option Fee.

(c)      TSMC will use commercially  reasonable  efforts to cause its fabs to be
         capable of producing  wafers of more  advanced  specifications,  as set
         forth in the TSMC Technology Road Map attached as Exhibit B.

<PAGE>


(d)      The Option Fee shall be repaid to  Customers  at the rate of * for each
         physical Wafer  purchased in excess of 70% of the Base Capacity up to a
         maximum of 100% of the Base Capacity in any given twelve months of this
         Agreement, as shown in Exhibit A. The repayment of the Option Fee shall
         terminate  upon (1)  depletion  of the  amount of the Option  Fee;  (2)
         termination of this  Agreement.  Upon  termination  of this  Agreement,
         except for cause,  TSMC shall return to Customers any remaining  amount
         of the Option Fee,  or,  Customers  may at their option and with TSMC's
         agreement roll over any remaining  amount of the Option Fee in any year
         to secure Wafer  capacity in the year  following  the then last year of
         this Agreement.  TSMC shall make  applicable  repayment on annual basis
         sixty (60) days after the year-end.


6.  FAILURE TO PURCHASE THE CUSTOMERS COMMITTED CAPACITY; FIRST RIGHT OF REFUSAL

(a)      Customers  shall notify TSMC of any changes from the annual total wafer
         requirement  during the  applicable  year.  TSMC has the right to use a
         third  party  to  conduct  audits  on  Customers'  annual  total  wafer
         requirements with a thirty (30) days written notice to Customers.

(b)      Customers  have the right to carry forward any portion of the Customers
         Committed Capacity in the years 1998 through 2003 to the year 2004 with
         a three month written  notice;  provided that,  the  Customers'  annual
         orders to TSMC  represents at least 60% of the  Customers  total annual
         wafer requirement from outside sources.  If Customers are unable to use
         any of the Customers Committed Capacity or TSMC's Committed Capacity in
         any year,  Customers  shall so notify TSMC  immediately  and TSMC shall
         have the right to sell such unneeded Capacity to third parties and such
         sale  shall not result in or be  construed  as a breach of the terms of
         this Agreement.


7.    TERM AND TERMINATION

(a)      The term of this Agreement  shall commence from the Effective Date, and
         continue until December 31, 2003. Subject to TSMC's approval, Customers
         may  elect to extend  this  Agreement  for a full  five year  period by
         giving  notice to TSMC at least  thirty  days prior to the  anniversary
         date or the expiration date of this Agreement. In the event that any of
         the Customers Committed Capacity is carried forward to the year of 2004
         pursuant to Subsection 6, this Agreement  shall be extended to December
         31, 2004 or until the full  amount of the Option Fee has been  refunded
         under the terms of this Agreement, whichever is the later.

(b)      The parties  shall review this  Agreement  annually  within thirty days
         preceding  the  anniversary  of this  Agreement  or at such  time as is
         mutually  agreed  between  TSMC and  Customers.  At such  review,  this
         Agreement  may  be  amended  by  mutual  agreement   between  TSMC  and
         Customers,  such amendment  being reduced to writing and signed by both
         TSMC and Customers.

<PAGE>


(c)      TERMINATION FOR OTHER BREACH OR FOR BANKRUPTCY
         Either  party may  terminate  this  Agreement  if (i) the  other  party
         breaches any material  provisions of this Agreement,  and does not cure
         such breach  within sixty (60) days from the date the  breaching  party
         receives a written  notice of such breach,  or (ii) becomes the subject
         of a voluntary or involuntary  petition in bankruptcy or any proceeding
         relating to insolvency,  receivership or liquidation,  if such petition
         or proceeding is not dismissed  with  prejudice  within sixty (60) days
         after filing.

(d)      EFFECT OF TERMINATION
         The parties shall remain liable to the other party for any  outstanding
         and  matured  rights and  obligations  at the time of  termination.  If
         termination is not for cause, or if customers terminate for cause, TSMC
         shall  return   applicable  Option  Fee  pro-rated  for  that  year  in
         accordance  to Section  5(d) of this  Agreement  within sixty (60) days
         following the date of  termination.  If TSMC  terminates this Agreement
         due to  material  breach,  TSMC  shall  have  the  sole  discretion  in
         determining either to refund the outstanding part of the Option Fee (i)
         in  accordance  to  Section  5(d) of  this  Agreement  or (ii)  without
         interest within a period to be determined by TSMC but no later than two
         (2) years from the date of such material breach.


8.  LIMITATION OF LIABILITY

         In no event  shall  any  party be  liable  for any  indirect,  special,
         incidental or consequential damages (including loss of profits and loss
         of use)  resulting  from,  arising out of or in connection  with either
         party's  performance  or failure to perform  under this  Agreement,  or
         resulting  from,  arising out of or in connection  with either  party's
         producing,  supplying,  and/or  sale of the  wafers,  whether  due to a
         breach of contract, breach of warranty, tort, negligence, or otherwise.

9.  NOTICE

         All notices  required or  permitted  to be sent by either  party to the
         other  party  under this  Agreement  shall be sent by  registered  mail
         postage  prepaid,  or by personal  delivery,  or by fax. A confirmation
         copy shall follow any notice given by fax within ten (10) days.  Unless
         changed  by written  notice  given by either  party to the  other,  the
         addresses  and  fax  numbers  of the  respective  parties  shall  be as
         follows:

         To TSMC:
         TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
         No. 121, Park Avenue 3
         Science-Based Industrial Park
         Hsinchu, Taiwan
         Republic of China                           FAX: 886-35-781545

<PAGE>


         To Customers:
         PMC-Sierra Ltd.
         105-8555 Baxter Place
         Burnaby, BC Canada V5A 4V7                  FAX: 604-415-6207

         PMC-Sierra Inc.
         105-8555 Baxter Place
         Burnaby, BC Canada V5A 4V7                  FAX: 604-415-6207


10.  ENTIRE AGREEMENT

         This  Agreement,  including  Exhibits A and B,  constitutes  the entire
         agreement  between  the  parties  with  respect to the  subject  matter
         hereof,  and  supersedes  and  replaces  all  prior or  contemporaneous
         understandings, agreements, dealings and negotiations, oral or written,
         regarding the subject matter  hereof.  No  modification,  alteration or
         amendment of this  Agreement  shall be effective  unless in writing and
         signed by all  parties.  No waiver of any  breach or  failure by either
         party to enforce  any  provision  of this  Agreement  shall be deemed a
         waiver  of any  other  or  subsequent  breach,  or a waiver  of  future
         enforcement of that or any other provision.

11.  GOVERNING LAW

         This Agreement will be governed by and  interpreted in accordance  with
         the laws of the Republic of China.

12.  ARBITRATION

         Each party will make best  efforts to resolve  amicably any disputes or
         claims  under this  Agreement  among the  parties.  In the event that a
         resolution  is not reached  among the parties  within  thirty (30) days
         after written notice by any party of the dispute or claim,  the dispute
         or claim  shall be finally  settled by  binding  arbitration  in Taipei
         under The Rules of Arbitration of the International Chamber of Commerce
         by three (3) arbitrators  appointed in accordance with such rules.  The
         arbitration  proceeding  shall be  conducted  in  Republic  of China in
         English.  Judgment  on the  award  rendered  by the  arbitrator  may be
         entered in any court having jurisdiction thereof.

<PAGE>


13.  ASSIGNMENT

      This Agreement  shall be binding on and inure to the benefit of each party
      and its successors. No party shall assign any of its rights hereunder, nor
      delegate its obligations hereunder,  to any third party, without the prior
      written consent of the other.

14.  CONFIDENTIALITY

      The parties shall keep in strict  confidence the existence and contents of
      this  Agreement,  and  take  every  precaution  possible  to  prevent  any
      unauthorized  disclosure  or use  thereof.  In  the  event  disclosure  is
      required by laws or governmental  regulations,  the disclosing party shall
      provide the opportunity to protest, participate in preparing disclosure or
      make reasonable changes hereto.  Notwithstanding  anything to the contrary
      stated in this  Paragraph 14 Customers may disclose to their  customer the
      general terms of this Agreement without quantifying the volumes, prices or
      delivery terms in this Agreement.  All such  disclosures by Customer shall
      be covered by a  non-disclosure  agreement  between the  Customer  and its
      customer of substantially  similar force and effect as the  non-disclosure
      agreement  signed  between  Customer and TSMC.  Both parties agree that no
      disclosure  of this  Agreement or any matter  relating  hereto may be made
      without the disclosing  party first  providing the proposed  disclosure to
      the other party two weeks in advance for written consent.

      Further, Customer may disclose to Customer's investors the fact that TSMC
      and  Customer  have  amended and  extended  the former  contract  existing
      between  them  whereby  TSMC has  contracted  to  supply  Customer  which,
      according to Customers forecast and estimates,  should  substantially meet
      the needs of Customer  through the calendar  year 2003.  In no event shall
      any  specific  quantities  be  disclosed  to anyone  without  TSMC's prior
      written consent.

15.  FORCE MAJEURE

      Neither party shall be  responsible  for delays nor failure in performance
      resulting from acts beyond the reasonable control of such party. Such acts
      shall include but not limited to acts of God, war, riot,  labor stoppages,
      governmental actions, fires, typhoons, floods, and earthquakes.

16.  OBLIGATION OF FUTURE PURCHASE

      Customers  agree  to tape  out one  hundred  per  cent  (100%)  of all new
      tapeouts until  Customers  purchase 60% of their total Wafer  requirements
      from TSMC,  including the Customers Committed Capacity requirement of this
      Agreement.  Notwithstanding anything to the contrary in this Agreement, in
      the year prior to the expiration hereof, the parties agree to negotiate in
      good faith to enter into a new agreement  under which  Customers  agree to
      contract  TSMC to  provide  a minimum  of 60% of  Customers'  total  wafer
      requirements,  provided that TSMC is able to continue to offer competitive
      technology, pricing, quality and delivery.
<PAGE>


     IN WITNESS  WHEREOF,  the parties,  have executed this  Agreement as of the
date first stated above.

TAIWAN SEMICONDUCTOR                                 PMC-SIERRA CORPORATION
MANUFACTURING CO., LTD.


BY:____________________                                 BY:____________________
     Ron Norris                                         Name:
     Sr. Vice President                                 Title:
     TSMC Ltd

                                                     PMC-SIERRA Ltd.
                                                        BY:_________________
                                                        Name:
                                                        Title:



<PAGE>
               Exhibit A
            CUSTOMERS'/TSMC
          COMMITTED CAPACITY *


                                                  Unit:  K Physical Wafers
                                1998  1999  2000   2001  2002   2003  2004
                                ----  ----  ----   ----  ----   ----  ----

Base Capacity
(For Options)

% of Base Commit

% X Base Capacity

Option Capacity

TSMC Committed Capacity
(Base Capacity +
Option Capacity)

Customers Committed
Capacity
(X % Base Capacity +
Option Capacity)



*Confidential  portions have been omitted pursuant to a request for confidential
treatment and have been filed separately with the Commission.


<PAGE>


          EXHIBIT B *




*Confidential  portions have been omitted pursuant to a request for confidential
treatment and have been filed separately with the Commission.





PMC-SIERRA, INC.
EXECUTIVE EMPLOYMENT AGREEMENT

This Agreement is between PMC-Sierra, Inc. (the "Company"), and Robert L. Bailey
("Executive")  and effective as of September 27, 1999.  1.  Termination  Without
Cause or Constructive Termination, With Change in Control. If Company terminates
Executive's   employment  without  Cause,  or  takes  actions  which  constitute
Constructive  Termination,  and a Change in Control (or the signing of a binding
agreement  which could  result in a Change in Control)  is  reasonably  expected
within  the  next 60 days or has  occurred  in the  past  two  years,  then  the
following  will  occur.  (i)  Promptly  following  such  actual or  Constructive
Termination, Executive shall receive
 (A) his Base Salary through the date of termination,
 (B) a lump-sum  payment  equal to 4% of his  then-current  Base Salary for each
full month  during  which he was  Employed  by the  Company  or its  affiliates,
provided  that this  total  payment  shall  not  exceed  two  times  Executive's
then-current Base Salary,
 (C) a  lump-sum  payment  equal to 2% of his prior  year's  bonus for each full
month  during which he was  Employed by the Company or its  affiliates  (up to a
maximum  payment  equal to his four  previous  quarterly  bonus  payments  added
together) and
 (D) all accrued vacation,  expense reimbursements and any other benefits due to
Executive through the date of termination in accordance with established Company
plans  and  policies.  (ii) If  within  10 days  after  the date of  termination
Executive signs and delivers to Company a consulting  agreement in substantially
Company's  standard  form  used on the  date of this  Agreement  which  requires
Executive  to (1)  provide  up to five days of  consulting  services  to Company
during each calendar  quarter at times reasonably  acceptable to Executive,  and
(2)  maintain  the  confidentiality  of  Company's  trade  secrets  and  not use
Company's trade secrets other than for Company's benefit, then each option which
Executive  holds  at the  date of  termination  will  continue  to  vest  and be
exercisable  until 30 days after the option has fully  vested.  (iii)  Until the
later of (1) two years  after the date  Executive's  employment  by the  Company
terminates  or (2) the date on which all options to purchase  Company stock held
by Executive are fully vested,  Executive will not directly or indirectly engage
in,  provide  services  to or own a more than 25% voting  interest in a business
anywhere  in the  world  which  develops,  manufactures,  markets  or sells  any
products which directly compete with the products manufactured, marketed or sold
by  the  Company  or  its  subsidiaries  at  the  date  Executive's   employment
terminates.  (iv)  Until the later of (1) two years  after the date  Executive's
employment  by the  Company  terminates  or (2) the date on which all options to
purchase  Company stock held by Executive are fully vested,  Executive  will not
directly or  indirectly  attempt to influence any employee of the Company or its
subsidiaries  to  terminate  the  individual's  services  to the  Company or its
subsidiaries,  or  hire  any  such  employee.  However,  Executive  may  hire an
individual if more than six months have elapsed since the individual  terminated
his or her  services  to the Company or its  subsidiaries,  and during the three
months  before and the six months  after the  individual  terminates  his or her
services  Executive did not communicate  with the individual about employment by
another  entity  with which  Executive  has any  relationship.  (v)  Executive's
agreements in Sections  1(iii) and 1(iv) are  severable,  and each will still be
enforceable even if another is not  enforceable.  If a court determines that any
provision of this section  exceeds the maximum scope,  time period or geographic
area that the court deems enforceable, the scope, time period or geographic area
shall be deemed the maximum that the court  considers  reasonable.  2. Automatic
Benefits  After Change in Control.  If on the first  anniversary  of a Change in
Control  Executive is employed by Company or its successor,  then Executive will
receive the payments and benefits under Sections  1(i)(A),  1(i)(D) and 1(ii) as
if Executive  had been  terminated  without  Cause on such date,  whether or not
Executive's  employment  continues  after such date. This provision shall become
effective  automatically  six months after the effective date of this Agreement.
3. Exclusive Remedy.  This Agreement  specifies all of Executive's  compensation
and benefits  resulting  from actual or  Constructive  termination in connection
with a Change  in  Control.  Executive  shall not not be  entitled  to any other
compensation  or benefits from the Company  except to the extent  provided under
any written  Company  benefit plan,  stock option  agreement or  indemnification
agreement, or as may be required under applicable law. 4. Definitions. (i) "Base
Salary" means  Executive's  then-current cash compensation paid on the Company's
standard  salary payment  schedule,  less applicable  withholding.  (ii) "Cause"
means  (i)  gross  dereliction  of  duties  which  continues  after at least two
notices, each 30 days apart, from the Chief Executive Officer (or in the case of
the Chief  Executive  Officer,  from a director  designated by a majority of the
board of  directors),  specifying in  reasonable  detail the tasks which must be
accomplished and a timeline for their  accomplishment  to avoid  termination for
Cause,  (ii)  willful and gross  misconduct  which  injures the  Company,  (iii)
willful and  material  violation  of laws  applicable  to the  Company,  or (iv)
embezzlement or theft of Company  property.  (iii) "Change of Control" means the
occurrence of any of the following events:
 (A) Any "person" or "group" as such terms are defined under  Sections 13 and 14
of the Securities Exchange Act of 1934 ("Exchange Act") (other than the Company,
a subsidiary of the Company,  or a Company  employee benefit plan) is or becomes
the  "beneficial  owner" (as defined in Exchange  Act Rule  13d-3),  directly or
indirectly,  of  Company  securities  representing  50% or more of the  combined
voting power of the Company's then outstanding securities.
 (B) The  closing of (a) the sale of all or  substantially  all of the assets of
the Company if the holders of Company  securities  representing all voting power
for the election of directors  before the transaction  hold less than a majority
of the total voting  power for the  election of directors of all entities  which
acquire  such  assets,  or (b) the merger of the  Company  with or into  another
corporation if the holders of Company  securities  representing all voting power
for the election of directors  before the transaction  hold less than a majority
of the total voting power for the election of directors of the surviving entity.
 (C) The issuance of  securities  which would give a person or group  beneficial
ownership of Company securities representing 50% or more of all voting power for
the election of directors.
 (D) A change in the board of directors  such that the  incumbent  directors and
nominees of the incumbent directors are no longer a majority of the total number
of directors. (iv) "Constructive  Termination" means (i) a material reduction in
Executive's Base Salary, target bonus or benefits,  (ii) a material reduction in
title,  authority,  status,  obligations  or  responsibilities,   or  (iii)  the
requirement that Executive relocate more than 100 miles from the current Company
headquarters.  5. Golden Parachute  Excise Tax. If the benefits  provided for in
this Agreement or otherwise payable to Executive constitute "parachute payments"
within the meaning of Section 280G of the Code and will be subject to the excise
tax imposed by Section 4999 of the Code,  then  Executive's  severance  benefits
under  Section 1 shall be (i)  delivered in full,  or (ii)  delivered as to such
lesser extent which would result in no portion of such severance  benefits being
subject to the Excise  Tax,  whichever  of the  foregoing  amounts,  taking into
account the applicable federal, state and local income taxes and the Excise Tax,
results in the receipt by  Executive  on an  after-tax  basis,  of the  greatest
amount of severance  benefits.  Unless the Company and Executive otherwise agree
in writing,  any  determination  required  under this Section 5 shall be made in
writing  in  good  faith  by  the  accounting  firm  serving  as  the  Company's
independent public  accountants  immediately prior to the Change of Control (the
"Accountants"). For purposes of making the calculations required by this Section
5, the Accountants may make reasonable assumptions and approximations concerning
applicable  taxes  and  may  rely  on  reasonable,  good  faith  interpretations
concerning  the  application  of Sections 280G and 4999 of the Code. The Company
and Executive shall furnish to the Accountants such information and documents as
the  Accountants may reasonably  request in order to make a determination  under
this Section.  The Company shall bear all costs the  Accountants  may reasonably
incur in connection  with any  calculations  contemplated  by this  Section.  6.
Assignment.  This  Agreement  shall  bind and  benefit  (a)  Executive's  heirs,
executors and legal representatives upon Executive's death and (b) any successor
of the Company.  Any such  successor of the Company shall be deemed  substituted
for the Company under the terms of this Agreement for all purposes.  "Successor"
shall include any person,  firm,  corporation or other business  entity which at
any time,  whether by  purchase,  merger or  otherwise,  directly or  indirectly
acquires  all or  substantially  all of the assets or business  of the  Company.
Executive  has no other right to assign this  Agreement  and any such  attempted
assignment  is void.  7.  Notices.  All  notices,  requests,  demands  and other
communications  under this  Agreement  shall be in  writing  and shall be deemed
given if (i)  delivered  personally,  (ii) one day after  being  sent by Federal
Express or a similar  commercial  overnight  service,  or (iii) three days after
being mailed by registered or certified mail, return receipt requested,  prepaid
and addressed to Company at its principal  office,  attention:  Chief  Executive
Officer,  or to Executive at his last principal  residence known to the Company,
or at such other  addresses as the parties may designate by written  notice.  8.
Severability. In the event that any provision hereof becomes or is declared by a
court of  competent  jurisdiction  to be illegal,  unenforceable  or void,  this
Agreement  shall  continue in full force and effect without said  provision.  9.
Entire Agreement.  This Agreement and any proprietary  information and invention
assignment,  stock option, stock purchase or indemnification agreement represent
the entire  agreement  and  understanding  between  the  Company  and  Executive
concerning Executive's employment  relationship with the Company 10. Arbitration
and Equitable  Relief.  (i) Any dispute or controversy  arising out of, relating
to, or in  connection  with this  Agreement,  or the  interpretation,  validity,
construction,  performance,  breach, or termination  thereof shall be settled by
arbitration  to be held in  Santa  Clara,  California  in  accordance  with  the
National Rules for the  Resolution of Employment  Disputes then in effect of the
American  Arbitration  Association  (the  "Rules").  The  arbitrator  may  grant
injunctions or other relief in such dispute or controversy.  The decision of the
arbitrator  shall  be  final,  conclusive  and  binding  on the  parties  to the
arbitration.  Judgment may be entered on the arbitrator's  decision in any court
having jurisdiction.  (ii) The arbitrator shall apply Delaware law to the merits
of any dispute or claim,  without  reference  to rules of  conflict of law.  The
arbitration  proceedings shall be governed by federal arbitration law and by the
Rules,  without  reference to state arbitration law. (iii) The Company shall pay
the costs and expenses of such arbitration.  Each party shall separately pay its
counsel  fees and  expenses.  (iv)  Executive  understands  that nothing in this
Agreement modifies  Executive's at-will status.  Either the Company or Executive
can terminate the employment  relationship  at any time,  with or without cause.
11. No Oral Modification,  Cancellation or Discharge. This Agreement may only be
amended,  canceled or discharged in writing signed by Executive and the Company.
12.  Withholding.  The Company  shall be entitled  to  withhold,  or cause to be
withheld,  from  payment any amount of  withholding  taxes  required by law with
respect  to  payments  made to  Executive  in  connection  with  his  employment
hereunder.  13.  Governing Law. This Agreement  shall be governed by the laws of
the State of Delaware  (with the exception of its conflict of laws  provisions).
14.  Representations.  Executive  represents  that he has had the opportunity to
discuss this matter with and obtain  advice from his private  attorney,  has had
sufficient  time to,  and has  carefully  read  and  fully  understands  all the
provisions of this  Agreement,  and is knowingly and  voluntarily  entering into
this Agreement.

PMC-SIERRA, INC
/s/ Alexandre Balkanski
ALEXANDRE BALKANSKI
DIRECTOR

/s/ Robert L. Bailey
ROBERT L. BAILEY
(signature)






PMC-SIERRA, INC.
EXECUTIVE EMPLOYMENT AGREEMENT

This Agreement is between  PMC-Sierra,  Inc. (the "Company"),  and Gregory Aasen
("Executive")  and effective as of September 27, 1999.  1.  Termination  Without
Cause or Constructive Termination, With Change in Control. If Company terminates
Executive's   employment  without  Cause,  or  takes  actions  which  constitute
Constructive  Termination,  and a Change in Control (or the signing of a binding
agreement  which could  result in a Change in Control)  is  reasonably  expected
within  the  next 60 days or has  occurred  in the  past  two  years,  then  the
following  will  occur.  (i)  Promptly  following  such  actual or  Constructive
Termination, Executive shall receive
 (A) his Base Salary through the date of termination,
 (B) a lump-sum  payment  equal to 4% of his  then-current  Base Salary for each
full month  during  which he was  Employed  by the  Company  or its  affiliates,
provided  that this  total  payment  shall  not  exceed  two  times  Executive's
then-current Base Salary,
 (C) a  lump-sum  payment  equal to 2% of his prior  year's  bonus for each full
month  during which he was  Employed by the Company or its  affiliates  (up to a
maximum  payment  equal to his four  previous  quarterly  bonus  payments  added
together) and
 (D) all accrued vacation,  expense reimbursements and any other benefits due to
Executive through the date of termination in accordance with established Company
plans  and  policies.  (ii) If  within  10 days  after  the date of  termination
Executive signs and delivers to Company a consulting  agreement in substantially
Company's  standard  form  used on the  date of this  Agreement  which  requires
Executive  to (1)  provide  up to five days of  consulting  services  to Company
during each calendar  quarter at times reasonably  acceptable to Executive,  and
(2)  maintain  the  confidentiality  of  Company's  trade  secrets  and  not use
Company's trade secrets other than for Company's benefit, then each option which
Executive  holds  at the  date of  termination  will  continue  to  vest  and be
exercisable  until 30 days after the option has fully  vested.  (iii)  Until the
later of (1) two years  after the date  Executive's  employment  by the  Company
terminates  or (2) the date on which all options to purchase  Company stock held
by Executive are fully vested,  Executive will not directly or indirectly engage
in,  provide  services  to or own a more than 25% voting  interest in a business
anywhere  in the  world  which  develops,  manufactures,  markets  or sells  any
products which directly compete with the products manufactured, marketed or sold
by  the  Company  or  its  subsidiaries  at  the  date  Executive's   employment
terminates.  (iv)  Until the later of (1) two years  after the date  Executive's
employment  by the  Company  terminates  or (2) the date on which all options to
purchase  Company stock held by Executive are fully vested,  Executive  will not
directly or  indirectly  attempt to influence any employee of the Company or its
subsidiaries  to  terminate  the  individual's  services  to the  Company or its
subsidiaries,  or  hire  any  such  employee.  However,  Executive  may  hire an
individual if more than six months have elapsed since the individual  terminated
his or her  services  to the Company or its  subsidiaries,  and during the three
months  before and the six months  after the  individual  terminates  his or her
services  Executive did not communicate  with the individual about employment by
another  entity  with which  Executive  has any  relationship.  (v)  Executive's
agreements in Sections  1(iii) and 1(iv) are  severable,  and each will still be
enforceable even if another is not  enforceable.  If a court determines that any
provision of this section  exceeds the maximum scope,  time period or geographic
area that the court deems enforceable, the scope, time period or geographic area
shall be deemed the maximum that the court  considers  reasonable.  2. Exclusive
Remedy.  This Agreement  specifies all of Executive's  compensation and benefits
resulting from actual or Constructive termination in connection with a Change in
Control.  Executive  shall  not not be  entitled  to any other  compensation  or
benefits  from the  Company  except to the  extent  provided  under any  written
Company benefit plan, stock option agreement or indemnification agreement, or as
may be required under applicable law.

3. Definitions.

(i) "Base Salary" means  Executive's  then-current cash compensation paid on the
Company's standard salary payment schedule,  less applicable  withholding.  (ii)
"Cause" means (i) gross dereliction of duties which continues after at least two
notices, each 30 days apart, from the Chief Executive Officer (or in the case of
the Chief  Executive  Officer,  from a director  designated by a majority of the
board of  directors),  specifying in  reasonable  detail the tasks which must be
accomplished and a timeline for their  accomplishment  to avoid  termination for
Cause,  (ii)  willful and gross  misconduct  which  injures the  Company,  (iii)
willful and  material  violation  of laws  applicable  to the  Company,  or (iv)
embezzlement or theft of Company  property.  (iii) "Change of Control" means the
occurrence of any of the following events:
 (A) Any "person" or "group" as such terms are defined under  Sections 13 and 14
of the Securities Exchange Act of 1934 ("Exchange Act") (other than the Company,
a subsidiary of the Company,  or a Company  employee benefit plan) is or becomes
the  "beneficial  owner" (as defined in Exchange  Act Rule  13d-3),  directly or
indirectly,  of  Company  securities  representing  50% or more of the  combined
voting power of the Company's then outstanding securities.

 (B) The  closing of (a) the sale of all or  substantially  all of the assets of
the Company if the holders of Company  securities  representing all voting power
for the election of directors  before the transaction  hold less than a majority
of the total voting  power for the  election of directors of all entities  which
acquire  such  assets,  or (b) the merger of the  Company  with or into  another
corporation if the holders of Company  securities  representing all voting power
for the election of directors  before the transaction  hold less than a majority
of the total voting power for the election of directors of the surviving entity.
 (C) The issuance of  securities  which would give a person or group  beneficial
ownership of Company securities representing 50% or more of all voting power for
the election of directors.
 (D) A change in the board of directors  such that the  incumbent  directors and
nominees of the incumbent directors are no longer a majority of the total number
of directors. (iv) "Constructive  Termination" means (i) a material reduction in
Executive's Base Salary, target bonus or benefits,  (ii) a material reduction in
title,  authority,  status,  obligations  or  responsibilities,   or  (iii)  the
requirement that Executive relocate more than 100 miles from the current Company
headquarters.  4. Golden Parachute  Excise Tax. If the benefits  provided for in
this Agreement or otherwise payable to Executive constitute "parachute payments"
within the meaning of Section 280G of the Code and will be subject to the excise
tax imposed by Section 4999 of the Code,  then  Executive's  severance  benefits
under  Section 1 shall be (i)  delivered in full,  or (ii)  delivered as to such
lesser extent which would result in no portion of such severance  benefits being
subject to the Excise  Tax,  whichever  of the  foregoing  amounts,  taking into
account the applicable federal, state and local income taxes and the Excise Tax,
results in the receipt by  Executive  on an  after-tax  basis,  of the  greatest
amount of severance  benefits.  Unless the Company and Executive otherwise agree
in writing,  any  determination  required  under this Section 5 shall be made in
writing  in  good  faith  by  the  accounting  firm  serving  as  the  Company's
independent public  accountants  immediately prior to the Change of Control (the
"Accountants"). For purposes of making the calculations required by this Section
5, the Accountants may make reasonable assumptions and approximations concerning
applicable  taxes  and  may  rely  on  reasonable,  good  faith  interpretations
concerning  the  application  of Sections 280G and 4999 of the Code. The Company
and Executive shall furnish to the Accountants such information and documents as
the  Accountants may reasonably  request in order to make a determination  under
this Section.  The Company shall bear all costs the  Accountants  may reasonably
incur in connection  with any  calculations  contemplated  by this  Section.  5.
Assignment.  This  Agreement  shall  bind and  benefit  (a)  Executive's  heirs,
executors and legal representatives upon Executive's death and (b) any successor
of the Company.  Any such  successor of the Company shall be deemed  substituted
for the Company under the terms of this Agreement for all purposes.  "Successor"
shall include any person,  firm,  corporation or other business  entity which at
any time,  whether by  purchase,  merger or  otherwise,  directly or  indirectly
acquires  all or  substantially  all of the assets or business  of the  Company.
Executive  has no other right to assign this  Agreement  and any such  attempted
assignment  is void.  6.  Notices.  All  notices,  requests,  demands  and other
communications  under this  Agreement  shall be in  writing  and shall be deemed
given if (i)  delivered  personally,  (ii) one day after  being  sent by Federal
Express or a similar  commercial  overnight  service,  or (iii) three days after
being mailed by registered or certified mail, return receipt requested,  prepaid
and addressed to Company at its principal  office,  attention:  Chief  Executive
Officer,  or to Executive at his last principal  residence known to the Company,
or at such other  addresses as the parties may designate by written  notice.  7.
Severability. In the event that any provision hereof becomes or is declared by a
court of  competent  jurisdiction  to be illegal,  unenforceable  or void,  this
Agreement  shall  continue in full force and effect without said  provision.  8.
Entire Agreement.  This Agreement and any proprietary  information and invention
assignment,  stock option, stock purchase or indemnification agreement represent
the entire  agreement  and  understanding  between  the  Company  and  Executive
concerning Executive's  employment  relationship with the Company 9. Arbitration
and Equitable  Relief.  (i) Any dispute or controversy  arising out of, relating
to, or in  connection  with this  Agreement,  or the  interpretation,  validity,
construction,  performance,  breach, or termination  thereof shall be settled by
arbitration  to be held in  Santa  Clara,  California  in  accordance  with  the
National Rules for the  Resolution of Employment  Disputes then in effect of the
American  Arbitration  Association  (the  "Rules").  The  arbitrator  may  grant
injunctions or other relief in such dispute or controversy.  The decision of the
arbitrator  shall  be  final,  conclusive  and  binding  on the  parties  to the
arbitration.  Judgment may be entered on the arbitrator's  decision in any court
having jurisdiction.  (ii) The arbitrator shall apply Delaware law to the merits
of any dispute or claim,  without  reference  to rules of  conflict of law.  The
arbitration  proceedings shall be governed by federal arbitration law and by the
Rules,  without  reference to state arbitration law. (iii) The Company shall pay
the costs and expenses of such arbitration.  Each party shall separately pay its
counsel  fees and  expenses.  (iv)  Executive  understands  that nothing in this
Agreement modifies  Executive's at-will status.  Either the Company or Executive
can terminate the employment  relationship  at any time,  with or without cause.
10. No Oral Modification,  Cancellation or Discharge. This Agreement may only be
amended,  canceled or discharged in writing signed by Executive and the Company.
11.  Withholding.  The Company  shall be entitled  to  withhold,  or cause to be
withheld,  from  payment any amount of  withholding  taxes  required by law with
respect  to  payments  made to  Executive  in  connection  with  his  employment
hereunder.  12.  Governing Law. This Agreement  shall be governed by the laws of
the State of Delaware  (with the exception of its conflict of laws  provisions).
13.  Representations.  Executive  represents  that he has had the opportunity to
discuss this matter with and obtain  advice from his private  attorney,  has had
sufficient  time to,  and has  carefully  read  and  fully  understands  all the
provisions of this  Agreement,  and is knowingly and  voluntarily  entering into
this Agreement.

PMC-SIERRA, INC.
/s/ Robert L. Bailey
ROBERT L. BAILEY
PRESIDENT & CEO

/s/ Gregory Aasen
GREGORY AASEN
(signature)





PMC-SIERRA, INC.
EXECUTIVE EMPLOYMENT AGREEMENT

This Agreement is between PMC-Sierra, Inc. (the "Company"), and John W. Sullivan
("Executive")  and effective as of September 27, 1999.  1.  Termination  Without
Cause or Constructive Termination, With Change in Control. If Company terminates
Executive's   employment  without  Cause,  or  takes  actions  which  constitute
Constructive  Termination,  and a Change in Control (or the signing of a binding
agreement  which could  result in a Change in Control)  is  reasonably  expected
within  the  next 60 days or has  occurred  in the  past  two  years,  then  the
following  will  occur.  (i)  Promptly  following  such  actual or  Constructive
Termination, Executive shall receive
 (A) his Base Salary through the date of termination,
 (B) a lump-sum  payment  equal to 4% of his  then-current  Base Salary for each
full month  during  which he was  Employed  by the  Company  or its  affiliates,
provided  that this  total  payment  shall  not  exceed  two  times  Executive's
then-current Base Salary,
 (C) a  lump-sum  payment  equal to 2% of his prior  year's  bonus for each full
month  during which he was  Employed by the Company or its  affiliates  (up to a
maximum  payment  equal to his four  previous  quarterly  bonus  payments  added
together) and
 (D) all accrued vacation,  expense reimbursements and any other benefits due to
Executive through the date of termination in accordance with established Company
plans  and  policies.  (ii) If  within  10 days  after  the date of  termination
Executive signs and delivers to Company a consulting  agreement in substantially
Company's  standard  form  used on the  date of this  Agreement  which  requires
Executive  to (1)  provide  up to five days of  consulting  services  to Company
during each calendar  quarter at times reasonably  acceptable to Executive,  and
(2)  maintain  the  confidentiality  of  Company's  trade  secrets  and  not use
Company's trade secrets other than for Company's benefit, then each option which
Executive  holds  at the  date of  termination  will  continue  to  vest  and be
exercisable  until 30 days after the option has fully  vested.  (iii)  Until the
later of (1) two years  after the date  Executive's  employment  by the  Company
terminates  or (2) the date on which all options to purchase  Company stock held
by Executive are fully vested,  Executive will not directly or indirectly engage
in,  provide  services  to or own a more than 25% voting  interest in a business
anywhere  in the  world  which  develops,  manufactures,  markets  or sells  any
products which directly compete with the products manufactured, marketed or sold
by  the  Company  or  its  subsidiaries  at  the  date  Executive's   employment
terminates.  (iv)  Until the later of (1) two years  after the date  Executive's
employment  by the  Company  terminates  or (2) the date on which all options to
purchase  Company stock held by Executive are fully vested,  Executive  will not
directly or  indirectly  attempt to influence any employee of the Company or its
subsidiaries  to  terminate  the  individual's  services  to the  Company or its
subsidiaries,  or  hire  any  such  employee.  However,  Executive  may  hire an
individual if more than six months have elapsed since the individual  terminated
his or her  services  to the Company or its  subsidiaries,  and during the three
months  before and the six months  after the  individual  terminates  his or her
services  Executive did not communicate  with the individual about employment by
another  entity  with which  Executive  has any  relationship.  (v)  Executive's
agreements in Sections  1(iii) and 1(iv) are  severable,  and each will still be
enforceable even if another is not  enforceable.  If a court determines that any
provision of this section  exceeds the maximum scope,  time period or geographic
area that the court deems enforceable, the scope, time period or geographic area
shall be deemed the maximum that the court  considers  reasonable.  2. Automatic
Benefits  After Change in Control.  If on the first  anniversary  of a Change in
Control  Executive is employed by Company or its successor,  then Executive will
receive the payments and benefits under Sections  1(i)(A),  1(i)(D) and 1(ii) as
if Executive  had been  terminated  without  Cause on such date,  whether or not
Executive's  employment  continues  after such date. This provision shall become
effective  automatically  six months after the effective date of this Agreement.
3. Exclusive Remedy.  This Agreement  specifies all of Executive's  compensation
and benefits  resulting  from actual or  Constructive  termination in connection
with a Change  in  Control.  Executive  shall not not be  entitled  to any other
compensation  or benefits from the Company  except to the extent  provided under
any written  Company  benefit plan,  stock option  agreement or  indemnification
agreement, or as may be required under applicable law. 4. Definitions. (i) "Base
Salary" means  Executive's  then-current cash compensation paid on the Company's
standard  salary payment  schedule,  less applicable  withholding.  (ii) "Cause"
means  (i)  gross  dereliction  of  duties  which  continues  after at least two
notices, each 30 days apart, from the Chief Executive Officer (or in the case of
the Chief  Executive  Officer,  from a director  designated by a majority of the
board of  directors),  specifying in  reasonable  detail the tasks which must be
accomplished and a timeline for their  accomplishment  to avoid  termination for
Cause,  (ii)  willful and gross  misconduct  which  injures the  Company,  (iii)
willful and  material  violation  of laws  applicable  to the  Company,  or (iv)
embezzlement or theft of Company  property.  (iii) "Change of Control" means the
occurrence of any of the following events:
 (A) Any "person" or "group" as such terms are defined under  Sections 13 and 14
of the Securities Exchange Act of 1934 ("Exchange Act") (other than the Company,
a subsidiary of the Company,  or a Company  employee benefit plan) is or becomes
the  "beneficial  owner" (as defined in Exchange  Act Rule  13d-3),  directly or
indirectly,  of  Company  securities  representing  50% or more of the  combined
voting power of the Company's then outstanding securities.
 (B) The  closing of (a) the sale of all or  substantially  all of the assets of
the Company if the holders of Company  securities  representing all voting power
for the election of directors  before the transaction  hold less than a majority
of the total voting  power for the  election of directors of all entities  which
acquire  such  assets,  or (b) the merger of the  Company  with or into  another
corporation if the holders of Company  securities  representing all voting power
for the election of directors  before the transaction  hold less than a majority
of the total voting power for the election of directors of the surviving entity.
 (C) The issuance of  securities  which would give a person or group  beneficial
ownership of Company securities representing 50% or more of all voting power for
the election of directors.
 (D) A change in the board of directors  such that the  incumbent  directors and
nominees of the incumbent directors are no longer a majority of the total number
of directors. (iv) "Constructive  Termination" means (i) a material reduction in
Executive's Base Salary, target bonus or benefits,  (ii) a material reduction in
title,  authority,  status,  obligations  or  responsibilities,   or  (iii)  the
requirement that Executive relocate more than 100 miles from the current Company
headquarters.  5. Golden Parachute  Excise Tax. If the benefits  provided for in
this Agreement or otherwise payable to Executive constitute "parachute payments"
within the meaning of Section 280G of the Code and will be subject to the excise
tax imposed by Section 4999 of the Code,  then  Executive's  severance  benefits
under  Section 1 shall be (i)  delivered in full,  or (ii)  delivered as to such
lesser extent which would result in no portion of such severance  benefits being
subject to the Excise  Tax,  whichever  of the  foregoing  amounts,  taking into
account the applicable federal, state and local income taxes and the Excise Tax,
results in the receipt by  Executive  on an  after-tax  basis,  of the  greatest
amount of severance  benefits.  Unless the Company and Executive otherwise agree
in writing,  any  determination  required  under this Section 5 shall be made in
writing  in  good  faith  by  the  accounting  firm  serving  as  the  Company's
independent public  accountants  immediately prior to the Change of Control (the
"Accountants"). For purposes of making the calculations required by this Section
5, the Accountants may make reasonable assumptions and approximations concerning
applicable  taxes  and  may  rely  on  reasonable,  good  faith  interpretations
concerning  the  application  of Sections 280G and 4999 of the Code. The Company
and Executive shall furnish to the Accountants such information and documents as
the  Accountants may reasonably  request in order to make a determination  under
this Section.  The Company shall bear all costs the  Accountants  may reasonably
incur in connection  with any  calculations  contemplated  by this  Section.  6.
Assignment.  This  Agreement  shall  bind and  benefit  (a)  Executive's  heirs,
executors and legal representatives upon Executive's death and (b) any successor
of the Company.  Any such  successor of the Company shall be deemed  substituted
for the Company under the terms of this Agreement for all purposes.  "Successor"
shall include any person,  firm,  corporation or other business  entity which at
any time,  whether by  purchase,  merger or  otherwise,  directly or  indirectly
acquires  all or  substantially  all of the assets or business  of the  Company.
Executive  has no other right to assign this  Agreement  and any such  attempted
assignment  is void.  7.  Notices.  All  notices,  requests,  demands  and other
communications  under this  Agreement  shall be in  writing  and shall be deemed
given if (i)  delivered  personally,  (ii) one day after  being  sent by Federal
Express or a similar  commercial  overnight  service,  or (iii) three days after
being mailed by registered or certified mail, return receipt requested,  prepaid
and addressed to Company at its principal  office,  attention:  Chief  Executive
Officer,  or to Executive at his last principal  residence known to the Company,
or at such other  addresses as the parties may designate by written  notice.  8.
Severability. In the event that any provision hereof becomes or is declared by a
court of  competent  jurisdiction  to be illegal,  unenforceable  or void,  this
Agreement  shall  continue in full force and effect without said  provision.  9.
Entire Agreement.  This Agreement and any proprietary  information and invention
assignment,  stock option, stock purchase or indemnification agreement represent
the entire  agreement  and  understanding  between  the  Company  and  Executive
concerning Executive's employment  relationship with the Company 10. Arbitration
and Equitable  Relief.  (i) Any dispute or controversy  arising out of, relating
to, or in  connection  with this  Agreement,  or the  interpretation,  validity,
construction,  performance,  breach, or termination  thereof shall be settled by
arbitration  to be held in  Santa  Clara,  California  in  accordance  with  the
National Rules for the  Resolution of Employment  Disputes then in effect of the
American  Arbitration  Association  (the  "Rules").  The  arbitrator  may  grant
injunctions or other relief in such dispute or controversy.  The decision of the
arbitrator  shall  be  final,  conclusive  and  binding  on the  parties  to the
arbitration.  Judgment may be entered on the arbitrator's  decision in any court
having jurisdiction.  (ii) The arbitrator shall apply Delaware law to the merits
of any dispute or claim,  without  reference  to rules of  conflict of law.  The
arbitration  proceedings shall be governed by federal arbitration law and by the
Rules,  without  reference to state arbitration law. (iii) The Company shall pay
the costs and expenses of such arbitration.  Each party shall separately pay its
counsel  fees and  expenses.  (iv)  Executive  understands  that nothing in this
Agreement modifies  Executive's at-will status.  Either the Company or Executive
can terminate the employment  relationship  at any time,  with or without cause.
11. No Oral Modification,  Cancellation or Discharge. This Agreement may only be
amended,  canceled or discharged in writing signed by Executive and the Company.
12.  Withholding.  The Company  shall be entitled  to  withhold,  or cause to be
withheld,  from  payment any amount of  withholding  taxes  required by law with
respect  to  payments  made to  Executive  in  connection  with  his  employment
hereunder.  13.  Governing Law. This Agreement  shall be governed by the laws of
the State of Delaware  (with the exception of its conflict of laws  provisions).
14.  Representations.  Executive  represents  that he has had the opportunity to
discuss this matter with and obtain  advice from his private  attorney,  has had
sufficient  time to,  and has  carefully  read  and  fully  understands  all the
provisions of this  Agreement,  and is knowingly and  voluntarily  entering into
this Agreement.


PMC-SIERRA, INC
/s/ Robert L. Bailey
ROBERT L. BAILEY
PRESIDENT & CEO

/s/ John W. Sullivan
JOHN W. SULLIVAN
(signature)



                                PMC-SIERRA, INC.
                              LIST OF SUBSIDIARIES

1.   PMC-Sierra  Ltd.,  organized  under  the laws of  British  Columbia,  doing
     business only under its official name.

2.   PMC-Sierra,  Inc. (Portland),  organized under the laws of Delaware,  doing
     business only under its official name.

3.   PMC-Sierra  (Maryland),  Inc., organized under the laws of Delaware,  doing
     business only under its official name.

4.   PMC-Sierra  International Inc., organized under the laws of Barbados, doing
     business only under its official name.

5.   PMC-Sierra,  Inc.  (U.S.),  organized  under the laws of Washington,  doing
     business only under its official name.

6.   PMC-Sierra  Europe Ltd.,  organized  under the laws of the United  Kingdom,
     doing business only under its official name.

7.   Abrizio Software Corporation, organized under the laws of California, doing
     business only under its official name.






             CONSENT OF DELOITTE & TOUCHE LLP, INDEPENDENT AUDITORS


We consent to the  incorporation  by  reference in the  Registration  Statements
(Form S-3 Nos. 333-31450,  333-86951,  33-86930,  33-90392,  33-96620, 33-97490,
333-15519 and  333-55989),  and in the  Registration  Statements  (Form S-8 Nos.
333-94999,   333-92885,  333-87039,  33-41027,  33-80988,  333-13387,  33-80992,
33-94790, 333-13359,  333-34671,  333-13357, 333-55983 and 333-55991) pertaining
to the 1991 Employee Stock  Purchase  Plan,  the 1994 Incentive  Stock Plan, the
PMC-Sierra, Inc. (Portland) 1996 Stock Option Plan of PMC-Sierra, Inc. (formerly
Sierra Semiconductor Corporation), 1998 PMC-Sierra (Maryland), Inc. Stock Option
Plan and Abrizio Inc. 1997 Stock Option Plan and in the related Prospectuses, of
our report dated January 17, 2000,  with respect to the  consolidated  financial
statements  and schedule of  PMC-Sierra,  Inc.  (formerly  Sierra  Semiconductor
Corporation)  included  in this  Annual  Report  (Form  10-K) for the year ended
December 31, 1999.



/s/ Deloitte & Touche LLP

Vancouver, B.C.
March 17, 2000


<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE  CONTAINS SUMMARY  FINANCIAL  INFORMATION  EXTRACTED FROM THE FORM
10-K FILED FOR THE YEAR ENDED DECEMBER 26, 1999 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                                 1,000

<S>                                           <C>
<PERIOD-TYPE>                                 12-MOS
<FISCAL-YEAR-END>                             Dec-26-1999
<PERIOD-START>                                Dec-28-1998
<PERIOD-END>                                  Dec-26-1999
<CASH>                                             84,091
<SECURITIES>                                      106,636
<RECEIVABLES>                                      36,942
<ALLOWANCES>                                       (1,244)
<INVENTORY>                                         7,208
<CURRENT-ASSETS>                                  254,362
<PP&E>                                             89,358
<DEPRECIATION>                                    (43,869)
<TOTAL-ASSETS>                                    341,970
<CURRENT-LIABILITIES>                              89,115
<BONDS>                                             1,080
                                   0
                                             0
<COMMON>                                          206,790
<OTHER-SE>                                         28,896
<TOTAL-LIABILITY-AND-EQUITY>                      341,970
<SALES>                                           262,477
<TOTAL-REVENUES>                                  262,477
<CGS>                                              55,363
<TOTAL-COSTS>                                      55,363
<OTHER-EXPENSES>                                  107,405
<LOSS-PROVISION>                                      131
<INTEREST-EXPENSE>                                    812
<INCOME-PRETAX>                                   131,623
<INCOME-TAX>                                       41,603
<INCOME-CONTINUING>                                90,020
<DISCONTINUED>                                          0
<EXTRAORDINARY>                                         0
<CHANGES>                                               0
<NET-INCOME>                                       90,020
<EPS-BASIC>                                        0.66
<EPS-DILUTED>                                        0.60



</TABLE>


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