The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L are microprocessor supervisory circuits that reduce complexity and reduce the number of components required for power supply monitoring and battery control functions in µP systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components.
The MAX690A, MAX692A, MAX802L, MAX802M and MAX805L are microprocessor supervisory circuits that provide reset, battery‑backup switching, watchdog timer and power‑fail detection functions. They are offered in 8‑pin DIP and SO packages and are pin‑compatible with earlier Maxim parts.
Key features include precise voltage monitoring (4.65 V or 4.40 V thresholds), a 200 ms reset pulse, a 1.6 s watchdog timeout, and ultra‑low quiescent current in battery‑backup mode. The document provides electrical characteristics, typical operating circuits, pin descriptions, and guidance for using backup power sources such as SuperCaps.
| Reset voltage threshold (MAX690A/MAX802L/MAX805L) | 4.65 V |
|---|---|
| Reset voltage threshold (MAX692A/MAX802M) | 4.40 V |
| Watchdog timeout | 1.6 s |
The reset threshold for the MAX690A is 4.65 V.
The watchdog timer times out after 1.6 seconds.