MAX6373
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MAX6373

Pin-Selectable Watchdog Timers

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Features
  • Precision Watchdog Timer for Critical µP Applications
  • Pin-Selectable Watchdog Timeout Periods
  • Pin-Selectable Watchdog Startup Delay Periods
  • Ability to Change Watchdog Timing Characteristics Without Power Cycling
  • Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output
  • Watchdog Timer Disable Feature
  • +2.5V to +5.5V Operating Voltage
  • 8µA Low Supply Current
  • No External Components Required
  • Miniature 8-Pin SOT23 Package
  • AEC-Q100 Qualified (MAX6369KA/V+ and MAX6374KA/V+ Only)
Additional Details
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The MAX6369–MAX6374 are pin-selectable watchdog timers that supervise microprocessor (µP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeatedly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the µP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watchdog (active-low WDO) output to signal that the system is not executing the desired instructions within the expected time frame. The watchdog output pulse can be used to reset the µP or interrupt the system to warn of processing errors.

The MAX6369–MAX6374 are flexible watchdog timer supervisors that can increase system reliability through notification of code execution errors. The family offers several pin-selectable watchdog timing options to match a wide range of system timing applications:

  • Watchdog startup delay: provides an initial delay before the watchdog timer is started.
  • Watchdog timeout period: normal operating watchdog timeout period after the initial startup delay.
  • Watchdog output/timing options: open drain (100ms) or push-pull (1ms).
The MAX6369-MAX6374 operate over a +2.5V to +5.5V supply range and are available in miniature 8-pin SOT23 packages.

Applications

  • Automotive
  • Critical µP and Microcontroller (µC) Monitoring
  • Embedded Control Systems
  • Industrial Controllers
  • Networking
  • Telecommunications
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file View Data Sheet (Rev.9)
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Part Models 2
1ku List Price Starting From $2.05
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MAX6373

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Data Sheet

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UPDATED 04/24/2018
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MAX6369-MAX6374: Pin-Selectable Watchdog Timers Data Sheet (Rev.9)

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UPDATED 01/01/1900
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2226: 引脚可设置看门狗定时器 Data Sheet

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UPDATED 06/21/2016
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MAX6369-MAX6374_jp: ピン選択可能なウォッチドッグタイマ Data Sheet (Rev.7)

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Reliability Data

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UPDATED 01/12/2023
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MAX6373 Reliability Data redirect icon

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Design Note

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UPDATED 05/01/2001
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Watchdog Timer Assumes Varied Roles redirect icon

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UPDATED 10/08/2020
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Disable the Watchdog Timer during System Reboot redirect icon

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UPDATED 01/31/2003
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Different Ways to Use a MAX6369 Series Watchdog Timer redirect icon

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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MAX6373KA+T Small-Outline Transistor Package external-link
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