XC6123 Series

Voltage Detector with Watchdog Function and ON/OFF Control

The XC6123 series are highly accurate, low power consumption CMOS voltage detectors with a watchdog function and ON/OFF control.

As the watchdog timeout period & release delay period is internally set the time can be fixed and it is possible to have a system monitor without the need for external components. By making use of the newly added EN/ENB pin the watchdog function can be turned OFF allowing the series to be used as a simple voltage detector.

Detect voltage is fixed within a range of 1.6V~5.0V, selectable in 0.1V increments.


Detect Voltage Range 1.6V~5.0V(0.1V increments)
Hysteresis Width Detect Voltage×5%(TYP.)
Operating Voltage Range 1.0V~6.0V
Detect Voltage Temperature Characteristics ±100ppm/℃(TYP.)
Output Configuration N-channel open drain
Watchdog Pin Monitors CPU
EN/ENB Pin The watchdog function is forced off.
Release Delay Time 3.13ms/50ms/100ms/200ms/400ms(TYP.) can be selectable
Watchdog Timeout Period 50ms/100ms/200ms/400ms/800ms/1.6s(TYP.) can be selectable



Quality Reports


QuestionWhat does the watchdog timer work?

This timer function is continuously monitoring to check whether the microcomputer is normally operating or not and give notice of any abnormal operation.