<SEC-DOCUMENT>0000310568-18-000013-index.html : 20180131
<SEC-HEADER>0000310568-18-000013.hdr.sgml : 20180131
<ACCEPTANCE-DATETIME>20180131144901
ACCESSION NUMBER:		0000310568-18-000013
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180131
DATE AS OF CHANGE:		20180131
EFFECTIVENESS DATE:		20180131

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MICROSEMI CORP
		CENTRAL INDEX KEY:			0000310568
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				952110371
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1002

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-08866
		FILM NUMBER:		18562316

	BUSINESS ADDRESS:	
		STREET 1:		ONE ENTERPRISE
		CITY:			ALISO VIEJO
		STATE:			CA
		ZIP:			92656
		BUSINESS PHONE:		949-380-6100

	MAIL ADDRESS:	
		STREET 1:		ONE ENTERPRISE
		CITY:			ALISO VIEJO
		STATE:			CA
		ZIP:			92656

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MICROSEMICONDUCTOR CORP
		DATE OF NAME CHANGE:	19830323
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>proxysupplement2017.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: proxysupplement2017.htm

</DOCUMENT>
</SEC-DOCUMENT>