U5020M

In order to prevent the IC from an undesired reset output signal which may be caused by transcients on the supply under certain conditions, a pc board connection from Pin 2 to GND is strongly recommended.

The digital window watchdog timer, U5020M, is a CMOS integrated circuit. In applications where safety is critical,it is especially important to monitor the microcontroller. Normal microcontroller operation is indicated by a cyclically transmitted trigger signal, which is received by a window watchdog timer within a defined time window. A missing or a wrong trigger signal makes the watchdog timer reset the microcontroller. The U5020M is tailored for microcontrollers which can work in both full-power and sleep mode. With an additional voltage monitoring (power-on reset and supply voltage drop reset), the U5020M offers a complete monitoring solution for microsystems in automotive and industrial applications.