TPS3431-Q1 Automotive, standard programmable watchdog timer with enable |

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Automotive, standard programmable watchdog timer with enable


Recommended alternative parts

  • TPS3431  -  Catalog version of this device
  • TPS3850-Q1  -  Automotive standalone window watchdog timer to sense both early and late faults
  • TPS3851-Q1  -  Automotive standalone watchdog timer with no built-in voltage monitoring feature
  • TPS3430-Q1  - The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.   Late WDT fault only


The TPS3431-Q1 is a standard automotive programmable watchdog timer with an enable feature for automotive applications. The watchdog timeout features a 15% accuracy, high-precision timing (–40°C to +125°C) and 2.5% typical at 25ºC. The watchdog timeout can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via the Enable pin or the SET logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3431-Q1 is available in a small 3.00-mm ×
3.00-mm, 8-pin VSON package.


  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Factory-Programmed Precision Watchdog Timers:
    • ±15% Accurate Watchdog Timeout (WDT) Over Temperature
    • ±2.5% Accurate Watchdog Timeout (WDT) Typical at 25°C
  • Watchdog Disable Feature
  • User-Programmable Watchdog Timeout
  • Input Voltage Range: VDD = 1.8 V to 6.5 V
  • Low Quiescent Current: IDD = 10 µA (typ)
  • Active-Low Open-Drain Output
  • Enable Input (EN) and Enable Output (ENOUT)
  • Available in a Small 3-mm × 3-mm, 8-Pin VSON Package
  • Junction Operating Temperature Range:
    –40°C to +125°C

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Part number Order Number of supplies monitored VCC (Max) (V) VCC (Min) (V) Output driver type/reset output Time delay (ms) Features Rating Operating temperature range (C) TI functional safety category Watchdog timer WDI (sec)
TPS3431-Q1 Order now 1     6.5     1.8     Active-low
200     Watchdog timer
Watchdog disable
Active-low enable
Safety documentation    
Automotive     -40 to 125     Functional safety-capable     Programmable    
TPS3430-Q1 Order now 1     6.5     1.6     Active-low
Programmable     Watchdog timer
Window watchdog
Watchdog disable
Safety documentation    
Automotive     -40 to 125     Functional safety-capable     Programmable