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Product details

Parameters

Number of supplies monitored 1 Features Watchdog timer, Watchdog disable, Active-low enable Reset threshold accuracy (%) 0 Output driver type/reset output Active-low, Open-drain Time delay (ms) 200 Rating Catalog Watchdog timer WDI (sec) Programmable Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

VSON (DRB) 8 9 mm² 3 x 3 open-in-new Find other Supervisor & reset ICs

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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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.










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Technical documentation

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Type Title Date
* Datasheet TPS3431 Standard Programmable Watchdog Timer with Enable datasheet Jul. 24, 2018
Selection guides Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) Feb. 28, 2020
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) Oct. 09, 2018
User guides TPS3431EVM Standard Watchdog Timer With Enable User's Guide Jul. 12, 2018
Technical articles Don’t underestimate the power of an LDO Oct. 19, 2013
Technical articles How to optimize your DSP power budget Oct. 03, 2013
Technical articles "X" Marks the spot - 7 Treasures in a pirate engineer's treasure chest Sep. 19, 2013
Technical articles Power Tips: How to be discrete Sep. 17, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$29.00
Description

The TPS3431 evaluation module (EVM) is a platform for evaluating the TP3431 device. TPS3431 is a standard programmable watchdog timer with an enable feature for a wide variety of applications. This device is used to monitor a watchdog input from a MCU and trigger a watchdog output if a (...)

Features
  • Standard watchdog
  • Watchdog disable
  • Programmable watchdog timeout

Design tools & simulation

CALCULATION TOOLS Download
SNVC223.ZIP (51 KB)

Reference designs

REFERENCE DESIGNS Download
Nano power, wide VIN (12 V max) supervisor reference design used as comparator or power sequencer
TIDA-010041 — This reference design highlights a versatile use case for a low-power reset IC and a watchdog timer. With less than 1-µA current consumption, the TPS3840 device can be configured to work either as a comparator (with simple 3-pin configuration) or as a universal power supply supervisor that can (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SON (DRB) 8 View options

Ordering & quality

Support & training

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