The ADM8323/ADM8324 data sheet from Analog Devices details specifications, features, and operating parameters of the windowed watchdog supervisory circuits.
The ADM8323 and ADM8324 are supervisory circuits that monitor power‑supply voltage levels and code‑execution integrity in microprocessor‑based systems. They provide a windowed watchdog timer, manual reset input, and reset output options to protect against brown‑out and code errors.
Key features include 8 watchdog timeout windows, 26 reset‑threshold options from 2.5 V to 5 V, four reset‑timeout selections, low‑power consumption (~10 µA), operation over –40 °C to +125 °C, and qualification for automotive applications. The devices are supplied in a 5‑lead SOT‑23 package and are intended for automotive, computer, controller, and portable equipment designs.
| Supply Current (typical) | 10 µA – 20 µA |
|---|---|
| Reset Threshold Voltage | 2.5 V – 5 V (100 mV steps) |
| Reset Timeout Options | A: 1 ms, B: 20 ms, C: 140 ms, D: 1120 ms |
| Watchdog Fast Timeout Options | A: 1 ms, B‑H up to 512 ms |
| Package Type | 5‑lead SOT‑23 |
| Operating Temperature Range | –40 °C to +125 °C |
Typical supply current is between 10 µA and 20 µA depending on the supply voltage.
The ADM8323 provides a push‑pull active‑low reset output, while the ADM8324 provides an open‑drain active‑low reset output.
Yes, the ADM8323/ADM8324 are qualified for automotive applications.