RT9808

Preliminary RT9808 Micro-Power Voltage Detectors General Description Features The RT9808 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 RT9808 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. Once VDD recovered upcrossing the threshold level, the reset signal will be released if VDD is above threshold and last for the whole period of reset active time out. RT9808 is N-Channel, open-drain output. Ordering Information Internally Fixed Threshold 1.5V to 5V in 0.1V Step ±2% Accuracy Low Supply Current 3µA Quick Reset within 20µs Built-in Recovery Delay 200ms Low Functional Supply Voltage 0.9V N-Channel Open Drain Output Small 3-Pin SOT-23/SOT89 and 5-Pin SOT-25 Packages Applications Computers Controllers Intelligent Instruments Critical mP and mC Power Monitoring Portable/Battery-Powered Equipment RT9808 Package Type Pin Configurations V : SOT-23 B : SOT-25 (TOP VIEW) X : SOT-89 RESET 1 RESET Operating Temperature Range C : Commercial Standard 3 VDD VDD P : Pb Free with Commercial Standard Reset Threshold GND 2 GND 15 : 1.5V 16 : 1.6V SOT-23 : 49 : 4.9V 50 : 5.0V RESET ...