This document mainly introduces the MAX706P/R/S/T, MAX706AP/AR/AS/AT, and MAX708R/S/T microprocessor (µP) supervisory circuits, which can reduce the complexity and number of components required to monitor +3V power supply levels
The Maxim MAX706 and MAX708 series are low‑cost supervisory circuits that monitor +3 V to +5 V power‑supply levels for microprocessor systems. They provide reset output, watchdog timer, power‑fail detection and a manual‑reset input, with variant‑specific reset‑threshold voltages.
The document details absolute maximum ratings, electrical characteristics, pin descriptions, typical application circuits and package dimensions for the 8‑pin SO, DIP and uMAX packages. It also includes timing diagrams for reset and watchdog functions.
| Reset threshold voltage (R, S, T suffixes) | 2.63 V (R), 2.93 V (S), 3.08 V (T) |
|---|---|
| Watchdog timeout period | 1.6 s |
| Reset pulse width | 200 ms |
| Supply voltage range | +3 V to +5 V |
| Package types | 8‑pin SO, DIP, uMAX |
The watchdog timer times out after 1.6 seconds if the watchdog input is not toggled.
Devices with R, S, and T suffixes have reset thresholds of 2.63 V, 2.93 V, and 3.08 V respectively.
The parts are offered in 8‑pin SO, DIP, and uMAX surface‑mount packages.