Low Power WatchDog for Automotive Applications

The XD6121/XD6122/XD6123/XD6124 series are highly accurate, low power consumption CMOS voltage detectors with an integrated watchdog function and EN pin for turning the watchdog ON and OFF and AEC-Q100 Grade 3 compliant.

The series consist of a reference voltage source, delay circuit, comparator and output driver.  The watchdog timeout period & release delay period is internally set so it is possible to implement a highly-integrated system monitor without needing additional 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. With the XD6122/XD6124 series, since the EN/ENB pin is internally pulled up to VIN or pulled down to VSS, it is possible to use the watchdog function even when the pin is OPEN.

The detect voltages are internally fixed between 1.6V ~ 5.0V in increments of 100mV, using laser trimming technology. Six watchdog timeout period settings are available; 1.6s, 800ms, 400ms, 200ms, 100ms & 50ms. Five release delay times are available; 400ms, 200ms, 100ms, 50ms & 3.13ms.

For more information on the XD6121-24 click here

< Back