5-Pin Watchdog Timer Circuit

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Active: In Production.


The MAX6814 is a low-power watchdog circuit in a tiny 5- pin SC70 package. This device improves system reliability by monitoring the system for software code execution errors. When the watchdog input detects a transitional edge, the internal watchdog timer clears and restarts, then begins counting again. If the watchdog timer exceeds the watchdog timeout period (1.6s typ), the active-low, push-pull watchdog output asserts for the watchdog pulse period (140ms min) to alert the system of the fault.

The MAX6814 consumes only 4µA of supply current and is fully specified over the extended temperature range.

Data Sheet

Download this datasheet in PDF formatDownload Rev 2 (PDF, 108kB)
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Key Features

  • 4µA Operating Current
  • Watchdog Timer with 1.6s Timeout
  • 140ms (min) active-low WDO Pulse Period
  • Push-Pull Active-Low WDO
  • Fully Specified Over Extended Temperature Range
  • No External Components


  • Automotive Systems
  • Computers and Controllers
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments

Key Specifications:

Watchdog Timers
Part Number Watchdog Feature Watchdog Timeout Watchdog Output ICC
Oper. Temp.
max See Notes
Input (WDI)
Input/Output (WDI/WDO)
Watchdog Only
1s to 2s Push-Pull 24
-40 to +85
0 to +70
$1.54 @1k
See All Watchdog Timers (9)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX6814: Typical Operating Circuit
Typical Operating Circuit

More Information

Topmark Coding MAX6814

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Document Ref.: 19-2804 Rev 2; 2006-06-06
This page last modified: 2009-10-13