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STMicroelectronics Adds 40 Precision Voltage Monitoring ICs to Supervisor Family


Low cost industry-standard drop-in replacements available in volume with short lead-times

Geneva, December 16, 2005 – STMicroelectronics (NYSE: STM), a world leader in analog ICs, has today extended its family of Supervisor and Reset ICs with the introduction of the STM1061 series of low-power precision voltage detectors. The SOT23-packaged series – which is a perfect complement to ST’s STM18xx and STM809-812 Reset ICs – features a choice of 40 different laser-trimmed voltage thresholds, and is a drop-in replacement for Torex XC61C series parts.

The STM1061 devices are ideal for a broad range of voltage monitoring situations, including 1-bit A/D conversion, voltage limit monitoring and microprocessor supervision. For example, rather than using an A/D converter to determine whether a signal is above or below a certain fixed level, a much lower cost voltage detector can be used instead. Two devices can be used together for windowing, to determine if a signal is between two limits.

Of the 40 voltage threshold options, ten are standard stocking items: 3.4V, 3.1V, 2.9V, 2.8V, 2.7V, 2.6V, 2.3V, 2.2V, 1.7V and 1.6 volts (nominal). These ten standard versions are available now in production quantities. The full range offers thresholds in 0.1V increments from 1.6V to 5.5V, and the non-stock voltage options will be produced on request using ST’s innovative production flow – utilizing laser-trimming to set the threshold – to minimize lead times.

Target applications include any system where signal levels need to be monitored, and especially in cost-sensitive markets: consumer and white goods, Bluetooth and wireless headsets, optical mice and set-top boxes, as well as in medical, instrumentation and security systems.

The STM1061 offers excellent power consumption at only 900nA (typical). Some users will also use the STM1061 as an MCU Reset IC. While it does not include Reset timing delays, an external capacitor on the open drain output can perform the same function when timing and rise time are not critical. The voltage detectors include hysteresis to guard against oscillation. And because they are open drain, several devices can be wire-ORed together to form part of a multi-voltage microprocessor supervisor. With the tiny SOT23-3L package, board space is never a problem.

The STM1061 series operates over the industrial temperature range of –40°C to +85°C, and is supplied in Lead-free, RoHS compliant, SOT23-3L packages on reels of 2500 pieces. They are 100% pin-compatible drop-ins to parts commonly available throughout the industry. Production quantities of all the devices are available now, and US pricing starts at $0.08 in high volumes.

Further information on ST’s Reset and Supervisor products is available at

About ST’s Microcontroller, Linear & Discrete Group
STMicroelectronics is a world leader in offering complete system solutions that leverage its rich portfolio of Microcontroller, Linear, and Discrete products, advanced process and design technologies, and applications expertise. This emphasis on solutions allows the Company to minimize time-to-market for all customers worldwide in existing and emerging applications.

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 2004, the Company’s net revenues were $8.76 billion and net earnings were $601 million. Further information on ST can be found at


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