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Description

These ICs function in a variety of CPU systems and other logic systems, to detect power supply voltage and reset the system accurately when power is turned on or interrupted, and has a built-in fixed delay time generating circuit. This series has been represented in the past by PST574 / PST575, but these new low reset type system reset ICs expand the delay time series with a counter timer using an analog/digital hybrid circuit.

Block Diagram

Features

1. Fixed delay time setting by counter timer

Excellent delay time temperature characteristics ±800ppm/°C

2. Low operating limit voltage 0.65V typ.

3. Hysteresis voltage provided in detection voltage 50mV typ.

4. Current consumption for no-load ICCL=300μA typ. ICCH=200μA typ.

5. 5 delay time products available