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MAX6814
5-Pin Watchdog Timer Circuit


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Description
FULL DATA SHEET (PDF, 108kB)
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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.

Key Features   Applications/Uses
  • 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 Nom. Watchdog Timeout Range Watchdog Output Max. ICC (µA) RoHS Available Package Operating Temp. Range (°C) Price**
    MAX6814  Input (WDI)
    Input/Output (WDI/WDO)
    Watchdog Only
    1s to 2s Push-Pull 24 Yes SC-70/5 -40 to +85
    0 to +70
    $0.91 @ 1k
    See All Watchdog Timers (7)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

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    Document Ref.: 19-2804; Rev 2; 2006-06-06
    This page last modified: 2008-05-01



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