The MAX6351–MAX6360 are microprocessor (µP) supervisors with multiple reset voltages that significantly improve system reliability and accuracy compared to separate ICs or discrete components. If any input supply voltage drops below its associated preset threshold, all reset outputs are asserted. In addition, the output(s) is valid as long as either input supply voltage remains greater than +1.0V. All devices in this series have an active-low debounced manual reset input. In addition, the MAX6358/MAX6359/MAX6360 offer a watchdog timer input with a 46.4sec start-up timeout period and a 2.9sec timeout period. The MAX6355/MAX6356/MAX6357 offer an additional voltage monitor input to monitor a third voltage. The MAX6351 features both 3V and 5V active-low push-pull reset outputs. The MAX6353/MAX6356/MAX6359 offer a 5V active-low push-pull reset. The MAX6354/MAX6357/MAX6360 offer a 3V active-low push-pull reset. The MAX6352/MAX6355/MAX6358’s reset is active-low open-drain. All of these devices are offered with a wide variety of voltage threshold levels, as shown in the Voltage Threshold Levels table below. They are available in 5- and 6-pin SOT23 packages and operate over the extended (-40°C to +85°C) temperature range.
The MAX6351‑MAX6360 series are microprocessor supervisory circuits that monitor multiple supply voltages and generate reset signals when thresholds are crossed. They improve system reliability by providing active‑low reset outputs and optional watchdog timing.
Key features include selectable voltage‑threshold levels, active‑low push‑pull or open‑drain reset outputs, watchdog timer with start‑up and normal timeouts, and operation over a wide temperature range. The devices are offered in 5‑pin SOT23‑5 and 6‑pin SOT23‑6 packages and are suited for computers, intelligent instruments, controllers, and portable battery‑powered equipment.
| Package Types | 5‑pin SOT23‑5 and 6‑pin SOT23‑6 |
|---|---|
| Reset Output Options | 3 V and 5 V active‑low push‑pull, open‑drain |
| Watchdog Timer Start‑up Timeout | 46.4 sec (start‑up), 2.9 sec (normal) |
The MAX6351 provides both 3 V and 5 V active‑low push‑pull reset outputs.
The watchdog timer has a start‑up timeout of 46.4 seconds and a normal timeout of 2.9 seconds.