Maxim Integrated MAX6315US28D2+T Low-Power Microprocessor Reset Circuit

The MAX6315US28D2+T from Maxim Integrated is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant level of protection against low-voltage operation, which can lead to system malfunctions, data corruption, and component damage. This component is a perfect solution for systems that require an active-high reset signal.

This device is particularly well-suited for portable and battery-powered applications due to its low power consumption. The MAX6315US28D2+T operates over a wide voltage range and features a preset reset threshold voltage of 2.8V, ensuring that systems with a 3.3V power supply have a sufficient margin to manage power fluctuations. The reset output remains asserted for a minimum of 140ms after V<sub>CC has risen above the reset threshold, providing ample time for the system to stabilize upon power-up.

One of the key features of the MAX6315US28D2+T is its ability to assert a reset signal whenever the V<sub>CC supply voltage falls below the factory-set threshold, regardless of the transient duration. This ensures that the µP resets cleanly during power-up, power-down, and brownout conditions. The device is available in a small, 4-pin SOT-143 package, making it an ideal choice for space-constrained applications.

With its built-in temperature compensation, the reset threshold remains accurate and stable across the entire operating temperature range. This stability is crucial for maintaining reliable operation under varying environmental conditions. Additionally, the MAX6315US28D2+T features a low supply current of only 1µA (typical), which helps to extend the battery life in portable devices.

Overall, Maxim Integrated's MAX6315US28D2+T is a robust reset circuit that offers designers a simple yet effective way to enhance system reliability. Its ease of use, coupled with low power consumption and small footprint, makes it an excellent choice for a broad array of applications.