General Description

The AS1920 and AS1922 microprocessor supervisory circuits were designed to generate a reset when at least

one of the three monitored supply voltages falls below its respective trip threshold.

Key Features

! Simultaneous Triple-Voltage Monitoring

! Very-Low Supply Current: 6.2µA

! ±1.5% Accuracy Over Temperature

! Reset Time Delay: 200ms

! Power Supply Transient Immunity

! Guaranteed Reset for VCC3 ≥1V or VCC18 ≥ 1V

! Active-Low Push/Pull Reset Output (AS1920)

! Active-Low Open-Drain Reset Output (AS1922)

! 5-pin SOT23 Package

Applications

The devices are ideal for personal computers, note books, battery-powered systems, embedded controllers,

intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply monitoring application.