AUSTIN, Texas – Sept. 13, 2005 – Rounding out its portfolio of stereo codec integrated circuits (ICs) for digital audio applications, Cirrus Logic Inc. (Nasdaq: CRUS) has introduced the CS4270. With outstanding dynamic range and negligible distortion, the CS4270 boasts superior audio quality, making it ideal for entry- and mid-level applications such as set-top boxes, digital television, DVD recorders, audio/video receivers, music instruments and automotive audio systems.

The CS4270 utilizes a multi-bit Delta Sigma architecture, which provides high quality analog-to-digital and digital-to-analog data conversion with 24-bit resolution at any standard digital audio sampling rate up to 216 kHz. The CS4270 employs single-ended inputs and outputs and achieves dynamic range of 105dB and THD+N of –95dB. Requiring a minimal set of passive external components, the CS4270 provides designers with a simple solution that reduces the bill-of-materials cost and required space on their printed circuit board.

“The CS4270 provides designers of entry to mid-range audio systems a basic audio codec that is easy to use, sounds good, and is priced appropriately for their application,” said Jason Rhode, vice president, Mixed Signal Audio Division, Cirrus Logic. “By providing premium analog performance with minimal support circuitry, the CS4270 simply gets the job done and sounds good doing it.”

The CS4270 can operate from a single 3.3 V or 5 V power supply and includes on-chip level shifters for direct interface to logic levels from 1.8V to 5.0V. Basic functionality is available by simply configuring the pins in hardware mode. Configuring the device through an industry standard control port can access additional features such as logarithmic digital volume control. As with other Cirrus single-ended output data converters, the CS4270 utilizes Popguard® technology for controlling clicks and pops associated with power cycling, which eliminates external mute control circuitry.

Pricing and Availability

The CS4270, which is available in 24-pin TSSOP package, is currently in volume production and is priced at $2.43 in quantities of 10,000.

Cirrus Logic Inc.

Cirrus Logic develops high-precision analog and 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.

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Cirrus Logic and Cirrus are trademarks of Cirrus Logic Inc. All other product names noted herein may be trademarks of their respective holders.

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