ADM8323:  Supervisory Circuit with Windowed Watchdog, Manual Reset, and Active-Low Push-Pull Reset Output

Product Details

Product Status:Recommended for New Designs

The ADM8323/ADM8324 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. An on-chip watchdog timer checks for activity within a preset timeout window. A reset signal can also be asserted by an external push button through a manual reset input. The RESET output is either a push-pull (ADM8323) or open-drain (ADM8324).

A watchdog failure results in a low output on the RESET pin. A failure can be triggered either by a fast watchdog error (watchdog pulses too close together) or by a slow watchdog error (no watchdog pulse within the timeout period).This effectively gives a window in which to observe the watchdog pulse. The watchdog timeout is measured from the last falling edge of watchdog input (WDI).

Each part is available in a choice of 26 reset threshold options from 2.5 V to 5 V in 100 mV increments. There are also four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms (minimum).

The ADM8323/ADM8324 are available in 5-lead SOT-23 packages and typically consume only 10 µA, making them suitable for use in low power portable applications.

APPLICATIONS

  • Automotive
  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Portable equipment

FEATURES and BENEFITS

  • Windowed watchdog, 8 timeout options
  • 26 reset threshold options
    2.5 V to 5 V in 100 mV increments
  • 4 reset timeout options
    1 ms, 20 ms, 140 ms, and 1120 ms (minimum)
  • Manual reset input
  • Open-Drain or Push-Pull RESET outputs
  • Low power consumption
  • Specified over wide temperature range (-40°C to 125°C)
  • Qualified for automotive applications
  • 5-lead SOT-23 package

Functional Block Diagram for ADM8323

Design Tools,Models,Drivers & Software

Title Content Type File Type
Supervisor Parametric Search
Narrow down the thousands of available supervisors using parameters applicable to your application.
ADIsim Design/Simulation Tools HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

ADM8323 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM8323WCC29ARJZR7 Status: Production SOT23 5/6/8 Leads 5 Ind Reel, 3000 - $0.79 Y  Material Info Notify Me Purchase
ADM8323WCC46ARJZR7 Status: Production SOT23 5/6/8 Leads 5 Ind Reel, 3000 - $0.79 Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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