MAX6369–MAX6374 datasheet pdf

MAX6369–MAX6374 datasheet pdf

Pin-Selectable Watchdog TImers

The MAX6369–MAX6374 are pin-selectable watchdog

TImers that supervise microprocessor (μP) acTIvity and

signal when a system is operaTIng improperly. During

normal operation, the microprocessor should repeatedly

toggle the watchdog input (WDI) before the selected

watchdog timeout period elapses to demonstrate that

the system is processing code properly. If the μP does

not provide a valid watchdog input transition before the

timeout period expires, the supervisor asserts a watchdog

(WDO) output to signal that the system is not executing

the desired instructions within the expected time

frame. The watchdog output pulse can be used to reset

the μP or interrupt the system to warn of processing

errors.