Power Amplifier Chip suits portable audio products.

Press Release Summary:

Offered in 4 x 4 mm QFN16 package with 0.65 mm pad pitch, Model TS4997 delivers 1.2 W per channel of continuous average output power into 8 W loads. It operates on 2.7-5.5 V power supply, providing immunity to supply interference with 85 dB PSRR. Unit integrates analog 3D technology and 2-pin digital interface that controls 3D effect through independent gain adjustments. Signal-to-noise ratio is 106 dB(A), and pop and click interference is suppressed.

Original Press Release:

Stereo Power Amplifier Chip from STMicroelectronics Creates Impressive 3D Audio Effects for Mobile Phone Platforms

Compact, self-contained amplifier for high-end portable audio products has power-efficient design and 1.2W/channel power output

GENEVA, June 4 /- STMicroelectronics (NYSE:STM), a world leader in mobile phone audio solutions, today announced a compact audio power amplifier chip - intended for mobile phones and for other portable audio products -- which creates 3D audio effects in the stereo speaker outputs to add impact and a surround-sound feel to MP3 and video files. The TS4997 can deliver 1.2-watts per channel of continuous average output power into 8-ohm loads, from a 5V supply - although it operates from supplies of as little as 2.7V -- while its high-efficiency design and ultra-low standby power will help extend battery life.

Mobile phones increasingly offer media features such as FM radio, MP3 player, video player and videophone. The TS4997 is an ideal solution that can enhance the performance of such functions, in addition to providing a high- quality stereo amplifier. It delivers an impressive stereo effect from a very small platform, and is also suitable for PDAs and for other portable audio devices.

ST's analog 3D technology, which is integrated in the TS4997, is the simplest in the market; no signal pre-processing is required, and it needs no external components to be added to the compact 4mm square package, minimizing space requirements and ensuring low production cost. A two-pin digital interface controls the 3D effect through independent gain adjustments for each audio channel, while additional left and right channel Standby mode pins allow the supply current to be cut to less than 10nA per channel.

The amplifier chip operates on a 2.7V to 5.5V power supply, providing excellent immunity to supply interference with 85dB PSRR. Signal-to-noise ratio (SNR) is a high 106dB(A), and pop and click interference is suppressed. The device is part of ST's large portfolio of audio amplifiers designed for portable applications such as mobile phones and laptop PCs.

The TS4997 is available now in a QFN16 4x4mm package, with 0.65mm pad pitch, priced at $1.20 in quantities of 1,000 pieces.

This press release is also available at st.com/stonline/stappl/press/news/year2007/p2179.htm

... with links to further information on the TS4997

About STMicroelectronics

STMicroelectronics is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence markets. The Company's shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2006, the Company's net revenues were $9.85 billion and net earnings were $782 million. Further information on ST can be found at www.st.com.

Source: STMicroelectronics

Michael Markowitz of STMicroelectronics,

Web site: www.st.com/

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