Home Power management Supervisor & reset ICs

TPS3431

ACTIVE
Order now

Standard programmable watchdog timer with enable

Data sheet
Top
Standard programmable watchdog timer with enable

TPS3431

ACTIVE
Data sheet Order now

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

All trademarks are the property of their respective owners.

open-in-new Find other Supervisor & reset ICs

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.










 open-in-new Find other Supervisor & reset ICs
Download
Similar products you might be interested in
open-in-new Compare products
Exact equivalent in functionality and parametrics to the compared device:
TPS3431-Q1 ACTIVE Automotive, standard programmable watchdog timer with enable AEC-Q100 qualified version of this device
Same functionality and pinout but is not an equivalent to the compared device:
TPS3430 ACTIVE Window watchdog timer with programmable reset delay Early and late (window) WDT fault
Similar but not functionally equivalent to the compared device:
TPS3850 ACTIVE Precision window supervisor for OV & UV monitoring with window watchdog timer & programmable delay A standalone window watchdog timer to sense both early and late faults
TPS3851 ACTIVE High-accuracy voltage supervisor with Integrated watchdog timer A standalone watchdog timer with no built-in voltage monitoring feature

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet TPS3431 Standard Programmable Watchdog Timer with Enable datasheet Jul. 24, 2018
Application notes Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) Mar. 17, 2020
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
User guides TPS3431EVM Standard Watchdog Timer With Enable User's Guide Jul. 12, 2018
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 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
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
View details

Design tools & simulation

SIMULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)
View details
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

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Training series

View all TI training and videos

Videos

Related videos