UWDTPC Reference Manual
UWDTPC, Universal Standalone Watchdog Timer - $25
Internal PC OEM Version
It can be used to increase the reliability of nearly any microcontroller board, single board computer, or personal computer system by monitoring a signal, and activating the reset circuit if the signal is no longer present.
The UWDTPC has been designed to allow easy installation inside typical computer enclosures containing motherboards and power supplies, including personal computers and Mini ITX systems.
The UWDTPC is not a single piece "Stock Product", but is available in small quantities on a limited basis with the expectation that the user may specify the optoisolator current limiting resistor and trigger timing when purchasing a large quantity after the evaluation.