TPS3431-Q1 Automotive Standard Programmable Watchdog Timer With Enable | TI.com

TPS3431-Q1 (ACTIVE)

Automotive Standard Programmable Watchdog Timer With Enable

 

Description

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.










Features

  • 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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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-Q1 TPS3430-Q1 TPS3850-Q1 TPS3851-Q1
N/A     N/A     Adjustable
0.84
0.86
1.06
1.12
1.15
1.67
1.73
2.33
2.4
2.79
2.88
3.07
3.17
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    
Automotive     Automotive     Automotive     Automotive    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
Programmable     Programmable     Programmable     Programmable