Maxim Integrated MAX6417UK-T: Microprocessor Supervisory Circuit

The MAX6417UK-T from Maxim Integrated is a compact, low-power 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 that require voltage monitoring and battery control functions.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The MAX6417UK-T asserts a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold. The reset output remains asserted for a preset timeout period after VCC has risen above the reset threshold, ensuring the system has stabilized before the processor is allowed to run.

Key features of the MAX6417UK-T include:

• Factory-set reset threshold voltages ranging from 2.32V to 4.63V, accommodating a variety of power supply options.
• A low supply current of 1.5µA (typical) makes it suitable for battery-operated applications.
• Immune to short VCC transients, enhancing system stability.
• Capable of operating over a wide temperature range of -40°C to +125°C, suitable for industrial applications.
• The reset output is available in both active-low and open-drain configurations, offering flexibility in interfacing with other system components.
• It comes in a compact SOT-23 package, which is ideal for space-constrained applications.

The MAX6417UK-T is particularly useful in portable devices, computers, controllers, and intelligent instruments where it helps to prevent incorrect operation during power-up or subsequent dips in the supply voltage. Its small size, combined with high performance and low power consumption, makes it an excellent choice for maintaining system integrity across a variety of applications.

By integrating the MAX6417UK-T into your design, you can enhance the reliability and robustness of your system, ensuring that the connected microprocessor operates correctly and predictably, even under adverse power conditions.