STWD100NYWY3F

STWD100NYWY3F

STWD100PYW83F

STWD100PYW83F

STWD100YNXWY3F Active

Watchdog
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack3
GradeAutomotive
Package NameSOT23-5L
Key Features
  • Current consumption 13 µA typ.
  • Available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s
  • Chip enable input
  • Open drain or push-pullWDO output
  • Operating temperature range: –40 to 125 °C
  • Packages: SOT23-5 and SC70-5 (SOT323-5)
  • ESD performance
    • HBM: 2000 V
    • RCDM: 1000 V
  • Automotive qualified

The STWD100 watchdog timer circuits are self-contained devices which prevent system failures that are caused by certain types of hardware errors (such as, non-responding peripherals and bus contention) or software errors (such as a bad code jump and a code stuck in loop).


The STWD100 watchdog timer has an input, WDI, and an output, WDO. The input is used to clear the internal watchdog timer periodically within the specified timeout period, twd. While the system is operating correctly, it periodically toggles the watchdog input, WDI. If the system fails, the watchdog timer is not reset, a system alert is generated and the watchdog output, WDO, is asserted.


The STWD100 circuit also has an enable pin, EN, which can enable or disable the watchdog functionality. The EN pin is connected to the internal pull-down resistor. The device is enabled if the EN pin is left floating.

In stock:
$0.96
Range Unit Price Savings
1 - 9$0.960%
10 - 99$0.8115%
100 - 499$0.5542%
500$0.5246%
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