TPS3431 Standard Programmable Watchdog Timer With Enable | TI.com

TPS3431 (ACTIVE)

Standard Programmable Watchdog Timer With Enable

 

Description

The TPS3431 is a standard programmable watchdog timer with an enable feature for a wide variety of 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 is available in a small 3.00-mm ×
3.00-mm, 8-pin VSON package.










Features

  • 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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Parametrics Compare all products in Supervisor & reset ICs

 
Threshold Voltage 1 (Typ) (V)
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 TPS3430 TPS3850 TPS3851
N/A     N/A     Adjustable
1.11
1.15
1.67
1.72
2.79
2.88
3.06
3.16
4.65
4.8    
1.67
1.73
2.32
2.4
2.79
2.88
3.07
3.17
4.65
4.8    
1     1     1     1    
6.5     6.5     6.5     6.5    
1.8     1.6     1.6     1.6    
Active-low
Open-drain    
Active-low
Open-drain    
Active-low
Open-drain    
Active-low
Open-drain    
200     Programmable     Programmable     200    
Watchdog timer
Watchdog disable
Active-low enable    
Watchdog timer
Window watchdog
Watchdog disable    
Undervoltage & overvoltage monitor
Watchdog disable
Watchdog timer
Window watchdog    
Active-low enable
Manual reset
Watchdog disable
Watchdog timer    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
Programmable     Programmable     Programmable     Programmable