Microsemi Reports Continued Design Wins in Multiple WLAN, WiMAX and WiBro Reference...

Microsemi Reports Continued Design Wins in Multiple WLAN, WiMAX and WiBro
Reference Platforms

IRVINE, Calif., June 10, 2009 (GLOBE NEWSWIRE) -- Microsemi Corporation
(Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal
integrated circuits and high reliability semiconductors, announced today that it
has shipped a cumulative 100 million units of its Wireless LAN (WLAN) RF power
amplifiers.

"Microsemi's RF power amplifiers continue to be designed into the world's
leading WLAN platforms by customers and reference design partners who have grown
to expect our superior performance and best-in-class power efficiency," said
Steve Litchfield, Microsemi Executive Vice President and General Manager of the
Analog Mixed Signal Group. "Our portfolio of RF power amplifiers enables the
development of high-performance WLAN solutions that provide extended range,
superior reception, and reduced power consumption for various WLAN standards
including 802.11a/b/g and 802.11n."

Microsemi RF power amplifiers are used in a variety of applications ranging from
mobile handsets to wireless access points and half mini-cards for notebooks and
netbooks. Reference designs with market-leading WLAN chipset manufacturers are
available for many of Microsemi's power amplifiers.

About Microsemi

Microsemi Corporation, with corporate headquarters in Irvine, California, is a
leading designer, manufacturer and marketer of high performance analog and
mixed-signal integrated circuits and high reliability semiconductors. The
company's semiconductors manage and control or regulate power, protect against
transient voltage spikes and transmit, receive and amplify signals.

Microsemi's products include individual components as well as integrated circuit
solutions that enhance customer designs by improving performance and
reliability, battery optimization, reducing size or protecting circuits. The
principal markets the company serves include implanted medical,
defense/aerospace and satellite, notebook computers, monitors and LCD TVs,
automotive and mobile connectivity applications. More information may be
obtained by contacting the company directly or by visiting its website at
http://www.microsemi.com.

The Microsemi Corporation logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=1233

PLEASE READ THE FOLLOWING FACTORS THAT CAN MATERIALLY AFFECT MICROSEMI'S FUTURE
RESULTS.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of
1995: Any statements set forth in this news release that are not entirely
historical and factual in nature, including without limitation statements
concerning expected continued trends of shipments of our Wireless LAN (WLAN) RF
power amplifiers, are forward-looking statements. These forward-looking
statements are based on our current expectations and are inherently subject to
risks and uncertainties that could cause actual results to differ materially
from those expressed in the forward-looking statements. The potential risks and
uncertainties include, but are not limited to, such factors as rapidly changing
technology and product obsolescence, potential cost increases, variations in
customer order preferences, weakness or competitive pricing environment of the
marketplace, uncertain demand for and acceptance of the company's products,
adverse circumstances in any of our end markets, results of in-process or
planned development or marketing and promotional campaigns, difficulties
foreseeing future demand, potential non-realization of expected orders or
non-realization of backlog, product returns, product liability, and other
potential unexpected business and economic conditions or adverse changes in
current or expected industry conditions, difficulties and costs of protecting
patents and other proprietary rights, inventory obsolescence and difficulties
regarding customer qualification of products. In addition to these factors and
any other factors mentioned elsewhere in this news release, the reader should
refer as well to the factors, uncertainties or risks identified in the company's
most recent Form 10-K and all subsequent Form 10-Q reports filed by Microsemi
with the SEC. Additional risk factors may be identified from time to time in
Microsemi's future filings. The forward-looking statements included in this
release speak only as of the date hereof, and Microsemi does not undertake any
obligation to update these forward-looking statements to reflect subsequent
events or circumstances.

-0-
CONTACT: Microsemi Corporation
Financial Contact:
John Hohener, Vice President and CFO
Editorial Contact:
Cliff Silver, Corporate Communications Manager
(949) 221-7100