ADM8320:  Supervisory Circuit with Watchdog, Manual Reset, and Active-Low Open-Drain Reset Output

Product Details

Product Status:Recommended for New Designs

The ADM8316/ADM8318/ADM8319/ADM8320/ ADM8321/ADM8322 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. As well as providing power-on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by an external push button through a manual reset input.

Each part is available in a choice of 26 reset threshold options ranging 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) and four watchdog timeout options of 6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical).

The ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/ADM8322 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 infotainment
  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Portable equipment

FEATURES and BENEFITS

  • 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)
  • 4 watchdog timeout options
    6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)
  • Manual reset input
  • Multiple Reset output options
  • 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 ADM8320

Design Tools,Models,Drivers & Software

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ADM8320 Model Options
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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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