Maxim Integrated MAX824LEUK+T Microprocessor Reset Circuit

The MAX824LEUK+T is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated 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. This component is particularly suitable for portable and compact devices due to its small footprint and efficient power usage.

One of the key features of the MAX824LEUK+T is its ability to assert a reset signal whenever the VCC supply voltage falls below a preset threshold, ensuring the µP resets cleanly during power-up, power-down, and brown-out conditions. The reset output remains asserted for a preset timeout period after VCC has risen above the reset threshold level, providing a guaranteed reset duration and allowing the power supply and processor to stabilize.

This device is available in a small 5-pin SOT-23 package, making it ideal for space-constrained applications. The MAX824LEUK+T operates over a wide supply voltage range and has a low supply current, making it energy-efficient and suitable for battery-powered applications. It also features a debounced manual reset input, which allows for a manual reset, providing designers with flexibility and control over the reset functionality.

Additional specifications include:

• Factory-trimmed reset threshold voltages for high accuracy
• Low, 1.2µA supply current, which enhances the overall energy efficiency of the system
• Immunity to short VCC transients, ensuring stable operation under noisy conditions
• Wide operating temperature range, making it suitable for various environments

Overall, the Maxim Integrated MAX824LEUK+T provides a compact, efficient, and reliable solution for voltage monitoring and reset functions in microprocessor systems. Its robust feature set ensures systems remain operational and protected against the uncertainties of power supply fluctuations.