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General Description

The AS1916 - AS1918 microprocessor supervisory circuits were designed to generate a reset when the monitored supply voltage falls below a factory-trimmed threshold. The reset remains asserted for a minimum timeout period after the supply voltage stabilizes.

Guaranteed to be in the correct state for VCC higher than +1.0V, these devices are ideal for portable and battery-powered systems with strict monitoring requirements.

The devices feature factory-trimmed thresholds to monitor a supply voltage between 1.8 and 3.6V.

Key Features

■ VCC Supervisory Range: +1.8 to +3.6V

■ Guaranteed Reset Valid Down to VCC = +1.0V

■ Reset Timeout Delay: 215ms

■ Manual Reset Input

■ Three Reset Output Types

- Active-Low Push/Pull (AS1916)

- Active-High Push/Pull (AS1917)

- Active-Low Open-Drain (AS1918)

■ Watchdog Timeout Period: 1.5s

■ Immune to Fast Negative VCC Transients

■ External Components Not Required

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

■ 5-pin SOT23 Package

Applications

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