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5-Pin Watchdog Timer Circuit

Product Details

Key Features

Parametric specs for Watchdog Timers
Watchdog Feature Input (WDI)
Input/Output (WDI/WDO)
Watchdog Only
Watchdog Timeout 1s to 2s
Watchdog Output Push-Pull
ICC (µA) (max) 24
Package/Pins SC70/5
Oper. Temp. (°C) -40 to +85
0 to +70
Budgetary
Price (See Notes)
1.72
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Simplified Block Diagram

Technical Docs

Data Sheet 5-Pin Watchdog Timer Circuit Sep 17, 2014

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Parameters

Parametric specs for Watchdog Timers
Watchdog Feature Input (WDI)
Input/Output (WDI/WDO)
Watchdog Only
Watchdog Timeout 1s to 2s
Watchdog Output Push-Pull
ICC (µA) (max) 24
Package/Pins SC70/5
Oper. Temp. (°C) -40 to +85
0 to +70
Budgetary
Price (See Notes)
1.72

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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX6814: Typical Operating Circuit MAX6814: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 5-Pin Watchdog Timer Circuit Sep 17, 2014

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .