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MAX6814
5-Pin Watchdog Timer Circuit


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Data Sheet
FULL DATA SHEET (PDF, 108kB)
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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.

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 Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX6814  Input (WDI)
    Input/Output (WDI/WDO)
    Watchdog Only
    1s to 2s Push-Pull 24 Yes SC70/5 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.

    Evaluation Kits
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    Design Guides
  • Microprocessor Supervisory (PDF)

    Reliability Reports
  • Show FIT data for:
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    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    MAX6814 Free
    Sample
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    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6814XK+  
    SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6814XK  
    SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6814XK-T  
    SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6814XK+T  
    SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX6369, MAX6370, MAX6371, MAX6372, MAX6373, MAX6374 Pin-Selectable Watchdog Timers

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


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