Calculation tool
Data sheet
TPS3431
- Factory-programmed precision watchdog timers:
- ±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 (typical)
- 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
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 25°C. 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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View all 5 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS3431 Standard Programmable Watchdog Timer with Enable datasheet (Rev. A) | PDF | HTML | 20 May 2021 |
| Application note | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | 17 Mar 2020 | ||
| Selection guide | Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) | 28 Feb 2020 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28 Jun 2019 | ||
| EVM User's guide | TPS3431EVM Standard Watchdog Timer With Enable User's Guide | 12 Jul 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS3431EVM — TPS3431 Standard Programmable Watchdog Timer With Enable Evaluation Module
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 (...)
User guide: PDF
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
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 (...)
Reference designs
TIDA-010041 — Nano power, wide VIN (12 V max) supervisor reference design used as comparator or power sequencer
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSON (DRB) | 8 | Ultra Librarian |
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