Maxim Integrated MAX6423XS26+T Microprocessor Supervisory Circuits

The MAX6423XS26+T from Maxim Integrated is a 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 monitoring nominal system voltages from 1.8V to 5V.

This device performs a variety of functions to ensure that the digital system operates correctly. It asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. This reset signal ensures that the µP and its peripherals are reset cleanly when power is applied.

The MAX6423XS26+T operates with a very low supply current of only 1.2µA, making it suitable for power-conscious systems. Its quiescent current is particularly beneficial for battery-operated equipment, where prolonged battery life is crucial.

Featuring an integrated watchdog timer, the MAX6423XS26+T provides an additional layer of system reliability. The watchdog timer monitors the activity of the microprocessor, forcing a system reset if the µP fails to strobe within a preset timeout period. This feature is vital for systems that require high reliability and fault tolerance.

The device comes in a compact, 4-pin SC70 package, which is ideal for space-constrained applications. Its small size and surface-mount package allow it to be easily integrated into various designs without taking up significant board space.

Key features of the MAX6423XS26+T include:

• Factory-Trimmed VCC Reset Thresholds for 1.8V to 5V Power Supplies
• 140ms (min) Reset Timeout Period
• 1.2µA Low Supply Current
• Integrated Watchdog Timer
• Compact 4-Pin SC70 Package

Overall, the MAX6423XS26+T is a versatile and dependable solution for system monitoring, offering the quality and performance expected from Maxim Integrated products. Its integration of multiple supervisory functions into a single chip makes it a cost-effective choice for maintaining system integrity across a wide range of applications.