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Simple WDT device to reset every 12 or 24 hrs

Khoi Nguyen83
Expert 1180 points
Other Parts Discussed in Thread: TPS3813, TPS3851, TPS3823, TPS3828, TPS3820, TPS3824

Do you have something similar to TPS3813 but would have a longer timeout instead of 25 second.

We are looking at 12 or 24 hours auto watchdog reset but I think the small devices can't handle large capacitor value.

Also do you have something would do edge detection on WDI input and generate one-shot reset?

-Khoi

  • 0
    TI__Genius 12630 points

    Khoi,

    The largest timeout we have is TPS3851 in the extended timing version with a 77 second watchdog timeout.

    We do have Watchdog Supervisors with a latched reset feature in which the /RESET will be latched low if the WDI is active (transitioning high to low) while /RESET is already asserted (low for /RESET). See TPS3820, TPS3823, TPS3824, and TPS3828.

    Please let me know if you have anymore questions!

    -Michael