Maxim Integrated MAX6358LSUT-T Microprocessor Reset Circuit

The MAX6358LSUT-T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant level of system reliability through its ability to reset a µP during power-up, power-down, and brownout conditions. The compact, high-quality component is an essential part of any system that requires a stable and dependable operation over time.

This supervisory circuit comes in a 6-pin SOT-23 package, making it suitable for space-constrained applications. The MAX6358LSUT-T operates over a wide voltage range, from 1.2V to 5.5V, catering to a variety of µP systems. Its low supply current of 1.2µA (typical) makes it an energy-efficient choice for portable and battery-operated equipment.

One of the key features of the MAX6358LSUT-T is its ability to assert a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold. The reset output remains asserted for a minimum reset timeout period after VCC rises above the reset threshold, ensuring the µP has adequate time to stabilize. The reset threshold options are available in approximately 100mV increments from 1.58V to 5.00V, which allows designers to tailor the reset threshold to their specific application requirements.

Moreover, the MAX6358LSUT-T includes a manual reset input that enables a push-button to trigger a reset, providing an additional layer of control. This feature is particularly useful for system maintenance, firmware updates, or when a manual system restart is necessary. The device also offers an active-low RESET output, which is guaranteed to be in the correct state for VCC down to 1.0V.

With its built-in hysteresis to prevent spurious resets, immunity to short VCC transients, and the ability to operate over the extended temperature range of -40°C to +125°C, the MAX6358LSUT-T is an excellent choice for mission-critical applications across various industries, including automotive, telecommunications, computing, and medical devices.

Overall, the Maxim Integrated MAX6358LSUT-T microprocessor reset circuit is a robust, versatile, and energy-efficient solution for maintaining system integrity through power disturbances.