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FM809 - 3-Pin C Supervisor Circuits

General Description

The FM809/810 are supervisor circuits that monitor power supply or other system voltages and issue reset pulse whenever the voltage being monitored is out of tolerance.

Once asserted, the reset pulse is guaranteed to be valid for a minimum of 140ms (256ms typical).

Key Features

  • I VTH voltages of 4.63V, 4.38V, 4.00V, 3.08V, 2.93V and 2.63V I RESET (FM809) or RESET (FM810) output Typical Operating Circuit VCC VCC FM809 µC RESET RESET I/P GND GND Connection Diagram GND 1 3 RESET (809) or RESET (810) 2 VCC FM809/810 SOT23-3 & SC70-3Packages ©2002 Fairchild Semiconductor Corporation 1 www. fairchildsemi. com FM809/810 Rev. F FM809/810 3-Pin µC Supervisor Circuits Absolute Maximum Ratings Voltage on any terminal relative to GND VCC RESET, RESET Input Current Output.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FM809/810 3-Pin µC Supervisor Circuits October 2002 FM809/810 3-Pin µC Supervisor Circuits General Description The FM809/810 are supervisor circuits that monitor power supply or other system voltages and issue reset pulse whenever the voltage being monitored is out of tolerance. Once asserted, the reset pulse is guaranteed to be valid for a minimum of 140ms (256ms typical). FM809xx offers active low push-pull type of reset while FM810xx offers active high push-pull type. Several threshold voltages are offered to accommodate 5.0V, 3.3V, 3.0V and 2.7V system voltages. The low supply current (typically 2 µA)recommends FM809/810 devices for portable designs or wherever power saving is primary. These devices are offered in space saving 3-pin SOT23 and SC70 packages.