Document And Entity Information	9 Months Ended
	Dec. 29, 2012	Jan. 21, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Entity Registrant Name	CIRRUS LOGIC INC
Entity Central Index Key	0000772406
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Dec. 29, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--03-30
Entity Common Stock, Shares Outstanding		64,371,867