Microsemi Acquires Nexsem, Inc.

High Power DC/DC Technology Complements Current Offering, Demonstrates Balanced Growth Objective

Irvine, California, UNITED STATES

IRVINE, Calif., June 8, 2009 (GLOBE NEWSWIRE) -- Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog mixed signal integrated circuits and high reliability semiconductors, today announced that it has executed an asset purchase agreement with Nexsem, Inc., a small privately held semiconductor designer and marketer based in Orange County, CA.

Nexsem is a growing designer and marketer of high voltage DC to DC conversion devices targeted at the traditionally fast growing commercial markets such as the: LCD-TV, Set Top Box, Notebook and Netbook, and other high-volume commercial applications.

"In Nexsem we have found an excellent complement to our existing power management offerings," stated James J. Peterson, President and Chief Executive Officer of Microsemi Corporation. "Focusing on higher power 5 to 40 watt applications, Nexsem's impressive technology nicely supplements our industry-leading low power product offering, while increasing our total dollar content per application in several high-growth markets. Not only is this strategic for our Analog Mixed Signal product offering, but it demonstrates our continued focus on a balanced growth model at Microsemi; one which augments the steady nature of our High-Reliability markets with the traditionally high growth opportunities found in the commercial marketplace."

Microsemi will further discuss this acquisition and provide general business updates during its third quarter results conference call in July 2009.

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


"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 our guidance on Microsemi's financial results, and the expected operational, technology, synergy, and other benefits of the acquisition, 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.


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