FM803

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. 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 Semiconductor International FM803 Rev. C.3 1 www.fairchildsemi.com FM803 3-Pin µC Supervisor Device Absolute Maximum Ratings Voltage on any terminal relative to GND VCC /RESET Input Current Output Current: /RESET -0.3V to +6.0V -0.3V to +6.0V 20mA 20mA Rate of Rise of VCC Continuous Power Dissipation (TA = +70°C) SOT23-3 (derate 4mW/°C above +70°C...