Ultra-low power timer with watchdog functionality & manual reset


Product details


Iq (Typ) (uA) 0.035 Features Low-power timer, Watchdog function, Programmable delay range, Manual reset Rating Catalog Operating temperature range (C) -40 to 105 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 1.8 open-in-new Find other Real-time clocks (RTCs) & timers

Package | Pins | Size

SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6 open-in-new Find other Real-time clocks (RTCs) & timers


  • Supply Voltage From 1.8 V to 5.5 V
  • Current Consumption at 2.5 V and 35 nA (Typical)
  • Selectable Time Intervals: 100 ms to 7200 s
  • Timer Accuracy: 1% (Typical)
  • Resistor Selectable Time Interval
  • Watchdog Functionality
  • Manual Reset
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The TPL5010 Nano Timer is an ultra-low power timer with a watchdog feature designed for system wake up in duty-cycled, battery-powered applications such as those in IoT. Many of these applications require the use of a µC, so it is desirable to keep the µC in a low power mode to maximize current savings, waking up only during certain time intervals to collect data or service an interrupt. Although the internal timer of the µC can be used for system wake-up, it can single-handedly consume microamps of total system current.

Consuming only 35 nA, the TPL5010 can replace the functionality of the integrated µC timer. This allows the µC to be placed in a much lower power mode, with the internal timer off, returning only to active mode upon an interrupt by the TPL5010. By offering power savings of almost two orders of magnitude, the TPL5010 enables the use of significantly smaller batteries for energy harvesting or wireless sensor applications. The TPL5010 provides selectable timing intervals from 100 ms to 7200 s and is designed for interrupt-driven applications. Some standards (such as EN50271) require implementation of a watchdog for safety and the TPL5010 realizes this watchdog function at almost no additional power consumption. The TPL5010 is available in a 6-pin SOT23 package.

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Technical documentation

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Type Title Date
* Data sheet TPL5010 Nano-Power System Timer With Watchdog Function datasheet (Rev. A) Sep. 27, 2018
Technical article Extending battery life for IoT applications Mar. 12, 2015
User guide TPL5010EVM User's Guide Jan. 09, 2015

Design & development

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Hardware development

document-generic User guide

The TPL5010EVM evaluation module allows a designer to configure the timer intervals of the TPL5010 and measure its very low current consumption. Moreover the TPL5010EVM is ready to be connected to the Launchpad of MSP430F5529 in order to test its watchdog and timer features. The EVM has an on board (...)

  1. Standalone EVM
  2. Battery powered (optional)
  3. Plug / Play into MSP430F5529 launchpad
  4. Manual configuration of the timer interval

Design tools & simulation

SNAM171.ZIP (116 KB) - IBIS Model
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
  • (...)

CAD/CAE symbols

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SOT-23-THIN (DDC) 6 View options

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