CORRECTING and REPLACING -- Microsemi to Participate in the Wells Fargo Securities...

CORRECTING and REPLACING -- Microsemi to Participate in the Wells Fargo
Securities 2nd Annual Midwest Technology Day

IRVINE, Calif., Nov. 16, 2009 (GLOBE NEWSWIRE) -- In a release dated November
15, 2009, please note the location has been changed to Chicago and the corporate
attendee has been listed. The corrected release follows:

Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance
analog mixed-signal integrated circuits and high reliability semiconductors,
announced today that James J. Peterson, President and Chief Executive Officer
will participate in the Wells Fargo Securities 2nd Annual Midwest Technology Day
at the Renaissance Chicago Hotel in Chicago on November 17, 2009.

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

-0-
CONTACT: Microsemi Corporation
Financial Contact:
John W. Hohener, Vice President and CFO
(949) 221-7100
Investor Relations:
Robert C. Adams, Vice President of Corporate Development
(949) 221-7100