Maxim Integrated MAX6343MUT Microprocessor Supervisory Circuit

The MAX6343MUT from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 3.3V power supply.

This compact supervisory circuit is tailored for monitoring 3.3V power supplies and maintains system integrity through a variety of features. One of its key functions is to assert a reset signal whenever the V<sub>CC supply voltage falls below a preset threshold, ensuring that the µP boots up in a known state. The reset signal remains asserted for a minimum timeout period after V<sub>CC has risen above the reset threshold, providing the system with a stable interval to initialize.

The MAX6343MUT comes in a tiny SOT23-6 package, making it ideal for space-constrained applications. It offers a factory-trimmed reset threshold voltage suited for 3.3V-powered systems, and the reset comparator is designed with a low 1.2% threshold accuracy, ensuring reliable operation even under varying conditions.

Additional features include a debounced manual reset input, which allows for a manual system reset, and a reset output stage that can be either push-pull or open-drain, depending on the specific needs of the application. The device consumes low quiescent current, typically 5.5µA, which is beneficial for battery-powered equipment.

With its wide operating temperature range of -40°C to +125°C, the MAX6343MUT is suitable for use in a diverse array of environments, from industrial to automotive applications. Its built-in capabilities make it an essential component for enhancing system reliability by providing a robust power-on reset feature, manual reset capability, and power-fail warning, which altogether help to safeguard µP systems against improper operation due to power disturbances.

In summary, the Maxim Integrated MAX6343MUT is a versatile and reliable solution for power monitoring in digital systems, offering robust features in a miniature package for applications where space and power conservation are critical.