●The MAX6369KA/V+ is a pin selectable watchdog timer in 8 pin SOT-23 package. It supervises microprocessor (µP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeatedly toggle watchdog input (WDI) before selected watchdog timeout period elapses to demonstrate that system is processing code properly. If µP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watchdog (active-low WDO) output to signal that the system is not executing desired instructions within expected time frame. The watchdog output pulse can be used to reset µP or interrupt the system to warn of processing errors. This flexible watchdog timer supervisor can increase system reliability through notification of code execution errors. Typical applications include embedded control systems, critical µP and microcontroller (µC) monitoring, telecommunications and networking.
● Automotive grade AEC-Q100 grade 1 qualified
● Operating voltage range of 2.5V to 5.5V & low supply current of 8µA at TA = -40°C to +85°C (no load)
● Watchdog start-up delay provides an initial delay before the watchdog timer is started
● Watchdog timeout period (normal operating watchdog timeout period after the initial start-up delay)
● Watchdog output/timing options, WDO pulse width of 100ms
● 1ms to 60s minimum start-up delay selectable & 1ms to 60s minimum watchdog timeout selectable
● Pin selectable watchdog timeout periods and watchdog start-up delay period
● Ability to change watchdog timing characteristics without power cycling
● Open-drain pulsed active-low watchdog output and watchdog timer disable
● Operating temperature range from -40°C to +125°C
