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