View max6323 datasheet:

19-1838; Rev 1; 1/01 µP Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset General Description Features The MAX6323/MAX6324 microprocessor (µP) supervi- ¦ Min/Max (Windowed) Watchdog, sory circuits monitor power supplies and µP activity in 8 Factory-Trimmed Timing Options digital systems. A watchdog timer looks for activity out- ¦ Pulsed Open-Drain, Active-Low Watchdog Output side an expected window of operation. Six laser- trimmed reset thresholds are available with ±2.5% ¦ Power-On Reset accuracy from +2.32V to +4.63V. Valid RESET output is ¦ Precision Monitoring of +2.5V, +3.0V, +3.3V, guaranteed down to VCC = +1.2V. and +5.0V Power Supplies The RESET output is either push-pull (MAX6323) or open-drain (MAX6324). RESET is asserted low when ¦ Open-