High Temp Supervisory Circuits with Watchdog

Supervisory circuit with watchdog, manual reset, and active-low push-pull reset output from ADI

Image of Analog Devices' High Temp Supervisory Circuits with WatchdogAnalog Devices' ADM8316/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/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.


ImageManufacturer Part NumberDescriptionPart StatusTypeNumber of Voltages MonitoredAvailable Quantity
ADM8316WBX30ARJZR7 datasheet linkIC SUPERVISOR WATCHDOG SOT23-5ADM8316WBX30ARJZR7IC SUPERVISOR WATCHDOG SOT23-5ActiveWatchdog Circuit11866 - Immediate
3000 - Factory Stock
ADM8316WBX30ARJZR7 product page link


ImageManufacturer Part NumberDescriptionPart StatusTypeNumber of Voltages MonitoredAvailable Quantity
ADM8321WAY30ARJZR7 datasheet linkIC SUPERVISOR WATCHDOG SOT23-5ADM8321WAY30ARJZR7IC SUPERVISOR WATCHDOG SOT23-5ActiveWatchdog Circuit12824 - Immediate
6000 - Factory Stock
ADM8321WAY30ARJZR7 product page link
ADM8323WCC29ARJZR7 datasheet linkIC SUPERVISOR WATCHDOG SOT23-5ADM8323WCC29ARJZR7IC SUPERVISOR WATCHDOG SOT23-5ActiveWatchdog Circuit12776 - Immediate
6000 - Factory Stock
ADM8323WCC29ARJZR7 product page link
ADM8324WCA29ARJZR7 datasheet linkIC SUPERVISOR WATCHDOG SOT23-5ADM8324WCA29ARJZR7IC SUPERVISOR WATCHDOG SOT23-5ActiveWatchdog Circuit12315 - Immediate
6000 - Factory Stock
ADM8324WCA29ARJZR7 product page link
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Published: 2014-01-15