This document introduces the functions and characteristics of the ADM691A/ADM693A/ADM800L/M series microprocessor supervisory circuits, including low power consumption, precision voltage monitoring, reset time delay, automatic battery backup power switching, and fast onboard gating of chip enable signals
The ADM800 family provides low‑power supervisory circuits for microprocessor systems, offering power‑on reset, battery backup switching, watchdog timer, and power‑fail detection. Features include 1 pA standby current, adjustable reset delay, and optional TSSOP packaging.
Typical applications cover microprocessor systems, computers, controllers, intelligent instruments, and automotive systems where reliable power‑monitoring and reset functions are required.
| Operating Voltage Range | 0 V to 5.5 V |
|---|---|
| Reset Voltage Threshold (ADM800L) | 4.5 V – 4.75 V |
| Package Types | 16‑Lead TSSOP, 16‑Lead DIP (RU‑16) |
The ADM800L reset threshold is specified between 4.5 V (minimum) and 4.75 V (maximum).
The watchdog timeout is set by the OSC SEL and OSC IN pins; using an external capacitor or clock on OSC IN changes the period according to the formulas in Table II.
The standby current in battery‑backup mode is about 0.04 µA (0.04 pA listed in the specifications).