The ADM823/ADM824/ADM825 are supervisory circuits with watchdog and manual reset in 5-Lead SC70 and SOT-23
The ADM823, ADM824, and ADM825 are supervisory circuits that monitor power‑supply voltage levels and code‑execution integrity in microprocessor‑based systems. They provide power‑on reset, watchdog timer, and optional manual reset functions, with seven selectable reset‑threshold options ranging from 2.19 V to 4.63 V.
The document lists electrical specifications, absolute maximum ratings, pin configurations, typical performance curves, and an ordering guide for the 5‑lead SC70 and SOT‑23 packages. It also includes functional block diagrams and revision history for design engineers and technicians.
| Operating Voltage Range | 1 V to 5.5 V |
|---|---|
| Supply Current | 10 µA to 24 µA (typical) |
| Reset Threshold Voltage (ADM823L) | 4.56 V to 4.70 V (typical 4.63 V) |
| Watchdog Timeout Period | 1.12 s to 2.40 s |
| Reset Output Voltage | 0.4 V (typical) |
| Operating Temperature Range | -40 °C to +125 °C |
The watchdog timeout period ranges from 1.12 seconds to 2.40 seconds, depending on the device and temperature.
The devices typically consume only about 5 µA, making them suitable for low‑power portable applications.
They are offered in 5‑lead SC70 and SOT‑23 surface‑mount packages.
Seven reset‑threshold options are available, ranging from 2.19 V to 4.63 V.