Description

The digital window watchdog timer, U5021M, 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.

Features

• Low Current Consumption: IDD < 100 µA

• RC Oscillator

• Internal Reset During Power-up and Supply Voltage Drops (POR)

• “Short” Trigger Window for Active Mode, “Long” Trigger Window for Sleep Mode

• Cyclical Wake-up of the Microcontroller in Sleep Mode

• Trigger Input

• Single Wake-up Input

• Reset Output

• Enable Output