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Voltage detector offers 40 laser-trimmed thresholds

Posted: 22 Dec 2005     Print Version  Bookmark and Share

Keywords:STMicroelectronics  ST  supervisor IC  reset IC  STM1061 

STM1061 reset IC

STMicroelectronics (ST) 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 complements ST's STM18xx and STM809-812 reset ICs, features a choice of 40 different laser-trimmed voltage thresholds.

The STM1061 devices are designed for a broad range of voltage monitoring situations, including 1-bit analogue-to-digital conversion, voltage limit monitoring and microprocessor supervision. ST cited an example: rather than using an analogue-to-digital converter to determine whether a signal is above or below a certain fixed level, a 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.

The STM1061 offers excellent power consumption at only 900nA. Engineers can use the STM1061 as an microcontroller 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.

The STM1061 series operates over the industrial temperature range of -40°C to 85°C, and is supplied in Pb-free, RoHS compliant, SOT23-3L packages on reels of 2,500 pieces. These devices are hundred per cent pin-compatible drop-ins to parts commonly available throughout the industry. Production quantities of all the devices are available, with pricing starting at 8 cents in high volumes.

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