Maxim Integrated MAX6421XS22+T Microprocessor Supervisory Circuit

The Maxim Integrated MAX6421XS22+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in system monitoring applications.

This supervisory circuit is specifically engineered to maintain system integrity by monitoring the power supply voltage levels and ensuring that they remain within acceptable thresholds. In the event of a power failure or if the supply voltage drops below a preset threshold, the MAX6421XS22+T asserts a reset signal to the microprocessor, effectively resetting the system to prevent erroneous operation. The reset signal remains asserted for a minimum timeout period after the supply voltage exceeds the reset threshold, ensuring the system has adequate time to stabilize.

Key features of the MAX6421XS22+T include:

• A precise factory-set reset threshold voltage of 2.2V, tailored for 2.5V-powered circuits.
• An extended reset timeout period of 280ms (min), providing ample time for system recovery after a voltage drop.
• Low supply current draw of 1.2µA (typ), ideal for power-sensitive applications.
• A small 4-pin SC70 package, which is excellent for space-constrained designs.
• Operating temperature range from -40°C to +125°C, allowing for use in a wide range of environmental conditions.

The MAX6421XS22+T is part of Maxim Integrated's family of µP supervisory circuits that are commonly used in applications such as portable/battery-powered equipment, computers, controllers, and intelligent instruments. Its tiny footprint and low power consumption make it an excellent choice for modern, compact electronic devices that require dependable monitoring without a significant power burden.

With its robust feature set and Maxim Integrated's reputation for high-quality, reliable integrated circuits, the MAX6421XS22+T is a smart choice for designers looking to enhance the reliability and performance of their system designs.