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AMCC and Plexus Announce Design PartnershipPlexus Announces Completion
of OC-192 Reference Design Resulting From Partnership

SAN DIEGO and NEENAH, Wis., May 31, 2001 /PRNewswire via COMTEX/ -- Applied
Micro Circuits Corporation (AMCC) (Nasdaq: AMCC) and Plexus Corp. (Nasdaq: PLXS)
announced today that they have entered into a strategic design partnership. AMCC
is the leader in high-bandwidth silicon connectivity solutions for the world's
optical networks. Plexus is a leading provider of product development, design,
manufacturing and testing services to the electronics industry.

The reference design partnership gives Plexus early access to AMCC's leading
edge optical networking components, along with pre-release of technical
information and direct access to AMCC's technical staff. In exchange, Plexus has
demonstrated the interoperability of AMCC's optical networking components,
incorporating them into a reference design that supports OC-192, OC-48, OC-12,
OC-3 and DS-3 bandwidths on a single, configurable card. The reference design
will be unveiled by Plexus at the Supercomm show in Atlanta, June 5-7.

Brent Little, senior vice president of marketing for AMCC, said "We have been
extremely impressed with the design skills of the Plexus engineers. In just six
weeks, they developed and prototyped a first class reference design using
several of our industry-leading optical components. The reference design
demonstrates the interoperability of our devices, and makes it easy to
incorporate AMCC components into end products."

"Using this reference design, we can accelerate our customers' time to market",
added Bob Kronser, executive vice president and chief technology and strategy
officer of Plexus. "By combining a broad spectrum of AMCC's optical components
with our best-in-class optical networking design, manufacturing and test
expertise, we have created a proven solution for OC-3 to OC-192 bandwidths.
Customers can come to Plexus to leverage our reference design, rather than
investing the time and money in reinventing what we have available today."

Plexus has additional optical reference design projects planned, including a
reference design incorporating AMCC's OC-768 products.

Plexus will be displaying its OC-192 reference design at Supercomm in booth
number 8416.

About AMCC

AMCC designs, develops, manufactures, and markets high-performance, high-
bandwidth silicon solutions for the world's optical networks. AMCC utilizes a
combination of high-frequency analog, mixed-signal and digital design expertise
coupled with system-level knowledge and multiple silicon process technologies to
offer integrated circuit products that enable the transport of voice and data
over fiber optic networks. The company's system solution portfolio includes PMD,
PHY, framer/mapper, network processor, traffic management and switch fabric
devices that address the high-performance needs of the evolving intelligent
optical network. AMCC's corporate headquarters and wafer fabrication facilities
are located in San Diego, California. Sales and engineering offices are located
throughout the world.

About Plexus

Headquartered in Neenah, Wisconsin, Plexus provides product realization services
to original equipment manufacturers (OEMs) in the networking/datacom, medical,
industrial and computer industries. Plexus offers engineering and product
development, New Product Introduction (NPI), prototyping, material procurement
and management, assembly, testing, manufacturing, final system box build,
fulfillment and sustaining services. Plexus provides leading-edge optical
networking capabilities starting with the specification, design and
qualification of optical products followed by a seamless transition to
manufacturing. Further information about Plexus can be found on its website at
http://www.plexus.com .


    Safe Harbor Statements

Plexus Corp Forward Looking Statements

The statements contained in this release which are not historical facts (such as
statements in the future tense and statements including "believe", "expect",
"intend", "anticipate" and similar concepts) are forwarding-looking statements
that involve risks and uncertainties, including, but not limited to material
cost fluctuations and the adequate availability of components and related parts
for production, the effect of start-up costs of new programs, the effect of
economic conditions, the success of products utilizing the technology in the
marketplace, the costs associated with research and development, successfulness
of the relationship with AMCC, anticipated sales resulting from the relationship
or new products derived from the relationship, timeliness or market acceptance
of products derived from the relationship,, and other risks detailed in the
Companies' Securities and Exchange Commission filings.

AMCC Forward Looking Statements

The statements contained in this press release that are not purely historical
are forward-looking statements within the meaning of Section 27A of the
Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934.
Such forward-looking statements including statements relating to the
relationship with Plexus, anticipated sales resulting from the relationship or
new products derived from the relationship are subject to a number of risks and
uncertainties, including the risk that the relationship would not result in such
sales, that products derived from the relationship would not be timely or
successfully developed or achieve market acceptance, risks associated with
general market conditions as well as the other risks and uncertainties set forth
in the "Factors That May Affect Future Results" detailed in the Company's Annual
Report on Form 10-K for the year ended March 31, 2001, and in other filings of
the Company with the Securities and Exchange Commission. As a result of these
risks and uncertainties, actual results may differ materially from these
forward-looking statements. The forward-looking statements contained in this
news release are made as of the date hereof and AMCC does not assume any
obligation to any forward-looking statement.

AMCC is a registered trademark of Applied Micro Circuits Corporation. All other
trademarks are the property of their respective owners.

CONTACT: Bill Berridge, 858-535-4260, billb@amcc.com , or Karen Hartz,
858-535-3436, khartz@amcc.com , both of Applied Micro Circuits Corp.; Karina
Wollesen of The Ardell Group, 650-569-3806, karina@ardellgroup.com , for AMCC;
or Kim Christopher, Director of Corporate Communications of Plexus Corp.,
920-751-3555, kim.christopher@plexus.com .


                    MAKE YOUR OPINION COUNT -  Click Here
               http://tbutton.prnewswire.com/prn/11690X63044452

SOURCE Plexus Corp.


CONTACT:          Bill Berridge, 858-535-4260, billb@amcc.com , or Karen Hartz,
                  858-535-3436, khartz@amcc.com , both of Applied Micro Circuits Corp.; Karina
                  Wollesen of The Ardell Group, 650-569-3806, karina@ardellgroup.com , for AMCC;
                  or Kim Christopher, Director of Corporate Communications of Plexus Corp.,
                  920-751-3555, kim.christopher@plexus.com

URL:              http://www.supercomm2001.com
                  http://www.plexus.com
http://www.prnewswire.com

(C) 2001 PR Newswire.  All rights reserved.

-0-


KEYWORD:          California
                  Wisconsin
                  Georgia
INDUSTRY KEYWORD: CPR
                  MLM
SUBJECT CODE:     JVN
                  PDT
                  TDS





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