High Temp Supervisory Circuits with Watchdog


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

The 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.

ADM831

Manufacturer Part Number Description Available Quantity Datasheets
ADM8316WBX30ARJZR7 IC SUPERVISOR WATCHDOG SOT23-5 2872

ADM32

Manufacturer Part Number Description Available Quantity Datasheets
ADM8321WAY30ARJZR7 IC SUPERVISOR WATCHDOG SOT23-5 2989
ADM8323WCC29ARJZR7 IC SUPERVISOR WATCHDOG SOT23-5 2988
ADM8324WCA29ARJZR7 IC SUPERVISOR WATCHDOG SOT23-5 2945