Maxim Integrated MAX6314US31D4+T Microprocessor Reset Circuit

The Maxim Integrated MAX6314US31D4+T is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant level of protection against the loss of code and data integrity due to power failures or unpredictable behavior caused by brownout conditions. This compact and efficient component is an ideal solution for managing system resets in a variety of electronic applications.

One of the key features of the MAX6314US31D4+T is its ability to assert a reset signal whenever the VCC supply voltage falls below a preset threshold, 3.1V in this case, ensuring that the µP resets cleanly during power-up, power-down, and brownout conditions. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold voltage, providing ample time for the system to stabilize.

This device comes in a 4-pin SOT-143 package, which is highly appreciated for its small footprint on PCBs, making it suitable for space-constrained applications. The MAX6314 series is available with factory-set reset threshold voltages from 2.5V to 5V, in approximately 100mV increments, allowing designers to tailor the reset threshold to their specific requirements.

Additionally, the MAX6314US31D4+T features a low supply current of 1.2µA (typical), which makes it an energy-efficient choice for portable and battery-operated devices. It is designed to operate over a wide temperature range of -40°C to +85°C, ensuring reliable performance in diverse operating environments.

The device is also equipped with a debounced manual reset input, which allows for a manual assertion of the reset signal when necessary. This feature can be used during system maintenance or troubleshooting to manually restart the system without cycling the power.

For applications requiring high-reliability supervisory circuits, the Maxim Integrated MAX6314US31D4+T provides a robust solution with its combination of low power consumption, compact packaging, and precision voltage monitoring, ensuring systems remain operational and protected against unexpected power disruptions.