Maxim Integrated MAX6381XR31D2-T Microprocessor Reset Circuit

The MAX6381XR31D2-T from Maxim Integrated is a high-quality microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant layer of protection by ensuring that the µP boots up in a known state every time. This precision circuit is tailored to maintain system integrity by monitoring the power supply voltage and issuing a reset signal to the µP whenever the supply voltage drops below a predetermined threshold.

This device comes in a compact, 3-pin SC70 package, making it an excellent choice for space-constrained applications. The MAX6381XR31D2-T features a factory-set reset threshold voltage of 3.1V, which is suitable for 3.3V-powered systems. When the supply voltage falls below this threshold, the reset output is asserted (held low) for a minimum reset timeout period of 140ms after V_CC rises above the reset threshold, ensuring the µP has ample time to stabilize.

One of the key features of the MAX6381XR31D2-T is its low supply current of only 1.1µA, which makes it an energy-efficient solution for battery-operated devices. The device operates over a wide voltage range from +1.2V to +5.5V, covering a broad spectrum of applications.

The integrated reset circuit is also designed with a debounce feature that filters out brief glitches on the V_CC line, preventing unnecessary resets and improving system reliability. This is particularly important in environments where supply noise can cause disruptions to sensitive electronic equipment.

Maxim Integrated's MAX6381XR31D2-T is ideal for use in a variety of electronic applications, including portable/battery-powered devices, computers, controllers, intelligent instruments, and critical µP and µC power monitoring. Its robust design ensures that systems remain operational even in the face of power supply uncertainties, making it a trusted component for designers looking to enhance system stability and reliability.

Overall, the MAX6381XR31D2-T is a testament to Maxim Integrated's commitment to delivering high-performance, reliable integrated circuits that meet the stringent demands of modern electronic systems.