General Description

The APR3021/2/3 are designed to monitor voltage supplies in μP and digital systems. The quiescent current is extremely low, typically 1.5 μA, making it ideal for portable battery operated equipment. The APR3021/2/3 operate by monitoring the system power supply voltage. When the input voltage drops below a fixed threshold, the device asserts a reset signal for a fixed time period after Vcc rises above the fixed threshold. The APR3021/2/3 series is available with three output stage versions : APR3021 push-pull active low output, APR3022 push-pull active high output and APR3023 open drain active low output. They are also designed to reject fast line transient glitches on Vcc. The APR3021/2/3 are come in a miniature SOT-23, SOT-23-5, SOT-89 packages.

特性 Features

? 1.2V to 5.5V Input Voltage Range

? Low Quiescent Current : less Than 1.5 μA

? High accuracy detection threshold : ±1.5

? Fixed trimmed reset thresholds for 1.5V, 1.75V, 2.32V, 2.63V, 2.93V, 3.08V, 3.9V, 4.38V.

? Reset Timeout Period 250ms

? Available output configurations

- Open-drain output

- CMOS active high output

- CMOS active low output

? SOT-23 , SOT-23-5 and SOT-89 packages

? No external components

Applications

? Computers

? Cell Phones

? Portable Electronics

? μP Power Supply Monitoring