TPS3431-Q1 Automotive Standard Programmable Watchdog Timer With Enable |

TPS3431-Q1 (ACTIVE) 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


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) 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     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     Programmable