This document introduces the characteristics of ADM823/ADM824/ADM825 products, including a precision 2.5 V to 5 V power supply monitor, 7 reset threshold options, 140 ms (minimum) reset timeout, a watchdog timer with 1.6 second timeout (ADM823, ADM824), manual reset input (ADM823, ADM825), push-pull output stages (RESET (ADM823), RESET, RESET (ADM824/ADM825), low power consumption: 5 μA, guaranteed reset output valid to VCC = 1 V, power supply glitch immunity, specified over automotive temperature range, 5-lead SC70 and SOT-23 packages.
The ADM823, ADM824, and ADM825 are supervisory circuits that monitor power‑supply voltage levels and provide reset and watchdog functions for microprocessor‑based systems. Features include selectable reset thresholds, low power consumption, and optional manual reset inputs.
The handbook contains detailed specifications, absolute maximum ratings, pin‑out diagrams, typical performance curves, and an ordering guide for the SC70 and SOT‑23 packages. It also includes application notes for portable equipment and industrial controllers.
| Supply Voltage Range | 1 V to 5.5 V |
|---|---|
| Watchdog Timeout Period | 1.12 s to 2.40 s |
| Manual Reset Pull‑Up Resistance | 52 kΩ |
The watchdog timeout period is 1.12 seconds to 2.40 seconds.
The manual reset input has an internal pull‑up resistance of 52 kΩ.
The reset timeout period is at least 140 ms.