General Description

The RT9801A/B is a micro-power voltage detector supervising the power supply voltage level for

microprocessors (μP) or digital systems. It provides user programmable threshold levels with 0.1V step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 3μA. Selection of VTHis easily achieved through 3 pins connected to GND, VDD or floating for different threshold voltage settings. Two versions of threshold voltages, 1.5V to 4V and 2.5V to 5V, which are programmed in factory are offered by customer demands.

Features

User Programmable Threshold 1.5V to 5V in 0.1V Step with ±3 Accuracy

Low Supply Current 3μA

Quick Reset within 20μs

Built-in Recovery Delay 200ms

Low Functional Supply Voltage 0.9V

Small SOT-23-6 Package

RoHS Compliant and 100 Lead (Pb)-Free

Applications

Computers

Controllers

Intelligent Instruments

Critical μP and μC Power Monitoring

Portable/Battery-Powered Equipment