Product details


Number of supplies monitored 1 Features Watchdog timer, Window watchdog, Watchdog disable Reset threshold accuracy (%) 0 Output driver type/reset output Active-low, Open-drain Time delay (ms) Programmable TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (sec) Programmable Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

VSON (DRC) 10 9 mm² 3 x 3 open-in-new Find other Supervisor & reset ICs


  • 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 and Watchdog Reset Delays Over Temperature
    • ±2.5% Accurate Watchdog Timeout and Watchdog Reset Delays Typical at 25°C
  • Watchdog Disable Feature
  • User-Programmable Watchdog Timeout
  • User-Programmable Watchdog Reset Delay
  • Input Voltage Range: VDD = 1.6 V to 6.5 V
  • Low Supply Current: IDD = 10 µA (typical)
  • Open-Drain Output
  • Small 3-mm × 3-mm, 10-Pin VSON Package
  • Junction Operating Temperature Range:
    –40°C to +125°C

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The TPS3430-Q1 is a standalone automotive window watchdog timer with programmable watchdog window and programmable watchdog reset delay for automotive applications. The TPS3430-Q1 window watchdog achieves 15% timing accuracy (–40°C to +125°C), 2.5% timing accuracy (typical at 25°C) and the watchdog output (WDO) reset delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via the SET pins to avoid undesired watchdog timeouts during the development process or during power on.

The TPS3430-Q1 is available in a small 3.00-mm ×
3.00-mm, 10-pin VSON package.

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TPS3850-Q1 ACTIVE Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay Automotive window detector with built-in window watchdog timer for overvoltage and undervoltage detection
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Technical documentation

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Type Title Date
* Data sheet TPS3430-Q1 Automotive Window Watchdog Timer with Programmable Reset Delay datasheet Jul. 25, 2018
Functional safety information TPS3430-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 18, 2019
Application note Open Load Detection and Limp Home Function in BCM Aug. 30, 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019

Design & development

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Hardware development

document-generic User guide

The TPS3430 evaluation module (EVM) is a platform for evaluating the TP3430 device. TPS3430 is a standalone window watchdog timer with programmable window watchdog and programmable reset delay for a wide variety of applications. This device is used to monitor watchdog input from (...)

  • Programmable window watchdog timer
  • Programmable reset delay
  • Watchdog disable
  • Open-drain output

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SNVC223A.ZIP (52 KB)

CAD/CAE symbols

Package Pins Download
VSON (DRC) 10 View options

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