General Description

The AS1910 - AS1915 microprocessor supervisory circuits were designed to generate a reset when one of the two monitored supply voltages falls below a factorytrimmed threshold, and to maintain the reset for a minimum timeout period when both supplies are above their reset thresholds. Guaranteed to be in the correct state for VCC higher than +1.0V, these devices are ideal for multiple-voltage systems with strict monitoring requirements.

Key Features

■ Primary VCC Supervisory Range: +1.8 to +3.6V

■ Secondary VCC Supervisory Range: +0.9 to +2.5V (AS1913/AS1914/AS1915)

■ User-Adjustable Threshold Down to +0.63V (AS1910/AS1911/AS1912)

■ Guaranteed Reset Valid Down to VCC = +1.0V

■ Reset Timeout Delay: 215ms

■ Manual Reset Input

■ Three Reset Output Types

- Active-High Push/Pull

- Active-Low Push/Pull

- Active-Low Open-Drain

■ Watchdog Timeout Period: 1.5s

■ Immune to Fast Negative VCC Transients

■ External Components Not Required

■ Operating Temperature Range: -40 to +125°C

■ 6-pin SOT23 Package

Applications

The devices are ideal for portable and battery-powered systems, embedded controllers, intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply application.