U5021M

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 Digital Window Watchdog Timer 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. A missing or a wrong trigger signal causes the watchdog timer to reset the microcontroller. The IC 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 d...