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Ultra-Low-Power Precision Temperature Sensor from STMicroelectronics is Ideal for 3G Cell Phones

STMicroelectronics (NYSE: STM) today announced a precision temperature sensor with an ultra-low supply cur- rent requirement of less than 4.3-microamps (typical) and a tiny 4-lead UDFN package, making it ideal for 3G cell phones and other battery applications where low power, coupled with small size, accuracy and linearity over the full temperature range, are essential. The new STLM20 is the lowest-current drop-in replacement for industry-standard LM20 devices, and is the first in a new se- ries of precision temperature sensors from ST.

The new device is an analog-output temperature sensor operating over a -55 to +130 degrees C temperature range. At 25 degrees C the precision sensor's temperature-to-voltage accuracy is plus or minus 1.5 degrees C, and it is plus/minus 2.5 degrees C over the entire operating temperature range. The STLM20 is supplied in a tiny 1.0mm x 1.3mm x 0.5mm thick 4-lead UDFN package - as well as in 5-lead SOT323 (SC70) - to meet the demands of space constrained products.

Operating from a supply voltage of 2.4V to 5V, the STLM20 draws a maximum of 8 microA over the full temperature range. It is targeted for the RF section of 3G mobile phones and multimedia PDAs, monitoring transmitter power amplifi- ers to guarantee linearity as required by the W-CDMA (Wideband Code Division Multiple Access) 3G standards. The STLM20 is also suitable for temperature- compensated crystal oscillators and battery chargers and other portable appli- cations, such as GPS devices and medical instruments.

The STLM20 is available now, priced at $0.25 in high volumes. For more information, go to http://www.st.com/sensors.

This press release is also available at

http://www.st.com/stonline/stappl/press/news/year2006/p2087.htm

... with links to further information on the STLM20

About STMicroelectronics

STMicroelectronics is a global leader in developing and delivering semi- conductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners posi- tions 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 Com- pany's shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2005, the Company's net revenues were $8.88 billion and net earnings were $266 million. Further information on ST can be found at http://www.st.com.

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