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