Protector 
Power 
Signal 
Driver 
Automotive ET9818
General Description
The ET9818 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 1.2V to 5V, which covers most digital applications.
It features low supply current of 3μA. The ET9818 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 after a certain delay time.
Features
Internally Fixed Threshold 1.2V to 5V in 0.1V Step
High Accuracy ±1.5%
Low Supply Current 3μA
No External Components Required
Quick Reset within 20μs
Built-in Recovery Delay Include 0ms, 55ms, 220ms,450ms Options
Low Functional Supply Voltage 0.9V
N-Channel Open-Drain Output
Applications
Computers
Controllers
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
Pin Configuration
Block Diagram
Application Circuits
