U5021M Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Lista de partido

U5021M

Digital Window Watchdog Timer

Atmel Corporation 

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

U5021M

1. Description

The digital window watchdog timer, U5021M, is a CMOS integrated circuit. In applica-

tions 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 microcon-

troller. 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

drop reset), the U5021M offers a complete monitoring solution for microsystems in

automotive and industrial applications.

Rev. 4756D–AUTO–11/05

Share Link: