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FM803 - 3-Pin C Supervisor Device

Description

The FM803 is a supervisory device designed to monitor power supply or other system voltage.

FM803 generates a 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 ).

Features

  • I Automatic reset generation on power-up I Minimum 140 ms reset pulse I Internal 5kΩ pull-up resistor I Other reset pulse choices available: 32 - 256 ms I Operating temperature -40°C to + 105°C (SOT-23) -40°C to +85°C (SC70) I Choice of Reset Thresholds: 4.63V, 4.38V, 4.00V, 3.08V, 2.93V, 2.63V I SOT23-3 and SC70-3 Packages Typical Operating Circuit VCC 3 FM803 Controller 1 2 /RESET GND Connection Diagram GND 1 FM803 3 VCC /RESET 2 SC70-3 & SOT23-3 Packages © 2000 Fairchild Semiconduc.

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Full PDF Text Transcription

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FM803 3-Pin µC Supervisor Device October 2002 FM803 3-Pin µC Supervisor Device General Description The FM803 is a supervisory device designed to monitor power supply or other system voltage. FM803 generates a 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 ). The reset output of FM803 is of active low Open-Drain type and has an internal pull-up resistor. Several threshold voltages are offered to accommodate 5.0V, 3.3V, 3.0V and 2.7V system voltages. These devices are offered in space saving 3-pin SOT23 and SC70 packages.
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