AUSTIN, Texas – June 29, 2005 – Cirrus Logic Inc. (Nasdaq: CRUS) has joined the new Russell Microcap™ Index when Russell Investment Group reconstituted its family of U.S. indexes on June 24, 2005. Russell recently posted a preliminary membership list at www.russell.com/US/Indexes and will post its final list on July 1, 2005.

The Russell Microcap Index offers managers and other investors a comprehensive, unbiased barometer to compare their performance against the genuine microcap marketplace of stocks. Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. More than $2.5 trillion in assets currently are benchmarked to them. Investment managers who oversee these funds purchase shares of member stocks according to that company‘s weighting in the particular index.

Cirrus Logic Inc.

Cirrus Logic develops high-precision, analog-rich mixed-signal integrated circuits for a broad range of consumer and industrial markets. Building on its diverse analog mixed-signal patent portfolio, Cirrus Logic delivers highly optimized products for consumer and commercial audio, automotive entertainment and industrial applications. The company operates from headquarters in Austin, Texas, with offices in Colorado, Europe, Japan and Asia.

# # #