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

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Product Details

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.


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

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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ADM8323 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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