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Stereo Codec to Meet New Demands for Multimedia PC Audio Excellence With 16-bit Delta-Sigma Conversion, Serial Interfacing and High-Performance Signal Path

Nov 11, 1996

November 11, 1996 -- National Semiconductor Corporation® today unveiled details about its new stereo audio codec that will fully comply with baseline AC '97 specifications. The new device will feature improved noise performance, with a SNR (signal-to-noise ratio) greater than 85dB for on-board delta-sigma 16-bit A/D and D/A converters. Also included will be National's proprietary 3D-sound circuitry, plus integrated headphone driver with its own dedicated volume control. The device will be sampled in Q197 in a 48-pin TQFP (thin quad flatpack).

"National's stereo codec will be a key link in the AC '97 audio chain," said Dan Parks, National’s director of audio marketing. "It will fill the need for a high-fidelity and low-cost system solution for the PC desktop market. In writing the first chapter on how to improve high-fidelity sound under the guidelines of AC '97, National will also enable the future integration of audio with other media functionality," he added.

"Dean McCarron of Mercury Research noted, "New PC audio systems based on the AC '97 standard will depend on quality codecs. By supplying AC '97 codecs, National will be able to expand its present PC audio business into the cutting edge of the PC audio market."

About AC '97
National has in fact compiled a history of excellence in the audio field for the PC market, as evidenced by the extremely successful Boomer® series of low-voltage power amps. The Boomer line was introduced for portable audio systems requiring the highest output power from 3 or 5-volt supplies and ultra-low current shutdown mode. National's Overture® amplifiers, a series of high power amps for the consumer audio market, also exemplify National's use of advanced process and package technology to solve many of the power and size problems generally associated with audio systems, while providing CD-quality sound.

For more information on AC '97, please contact Hans Wang at 408-721-8224. National Semiconductor produces analog and mixed-signal based silicon solutions for the information highway, communications, consumer and industrial markets. National Semiconductor is headquartered in Santa Clara, California and has 19,000 employees worldwide. In fiscal 1996, the company reported sales of $2.6 billion. For product information, visit http://www.national.com.