RT9809

Preliminary RT9809 Micro-Power Voltage Detectors General Description Features The RT9809 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (µP) or digital systems. It provides internally fixed threshold levels with 0.1V per step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 3µA. The RT9809 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. This reset signal will last the whole period before VDD recovering. Reset signal will release after VDD is recovered and lasts for the whole period of Reset Active Time-out period. RT9809 is CMOS, active-low output and is provided in SOT-23 package. Internally Fixed Threshold 1.5V to 5V in 0.1V Step ± 2% Accuracy Low Supply Current 3µA No External Components Required Quick Reset within 20µs Built-in Recovery Delay 200ms Low Functional Supply Voltage 0.9V Small 3-Pin SOT-23 Package Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Ordering Information Pin Configurations RT9809- (TOP VIEW) Package Type V : SOT-23 GND 1 Operating Temperature Range C : Commercial Standard 3 VDD P : Pb Free with Commercial Standard Reset Threshold RESET 2 15 : 1.5V SOT-23 16 : 1.6V : Typical Application Circuit 49 : 4.9V 50 : 5.0V VDD GND Marking Information VDD µP RT9809 For marking infor...