Maxim Integrated MAX802RCSA+T Microprocessor Reset Circuit

The MAX802RCSA+T is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant line of defense against power supply glitches and brownouts, ensuring that the microprocessor and associated digital systems maintain proper operation through various conditions. This device is particularly suited for portable and space-constrained applications due to its small size and low power consumption.

Featuring a 4.65V threshold voltage, the MAX802RCSA+T is tailored for systems that operate at 5V power supply levels. It offers precision monitoring and is capable of asserting a reset signal whenever the VCC supply voltage falls below the preset threshold. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset voltage threshold, providing ample time for the system to stabilize upon recovery from a power fault. This timeout feature ensures that the µP and other devices have reset cleanly and are ready for operation.

One of the key features of the MAX802RCSA+T is its low power consumption, drawing a quiescent current of typically only 20µA. This makes it an excellent choice for battery-operated equipment, where power efficiency is crucial. Additionally, the device is offered in a space-saving 8-pin SOIC package, which is ideal for applications with limited PCB real estate.

For added versatility, the MAX802RCSA+T includes a manual reset input that allows a reset to be triggered with an external switch or logic signal. This manual reset feature can be used for system testing and troubleshooting, providing engineers with a convenient tool to reset the system without cycling the power.

The device is fully specified over the temperature range of -40°C to +85°C, ensuring reliable operation in a wide range of environmental conditions. Whether used in complex computing systems, consumer electronics, or industrial equipment, the Maxim Integrated MAX802RCSA+T offers a robust solution for maintaining system integrity through power irregularities.

Overall, the MAX802RCSA+T is a testament to Maxim Integrated's commitment to providing high-quality, reliable integrated circuits that enhance the performance and stability of electronic systems.