Maxim Integrated MAX6424UK21-T Microprocessor Reset Circuit

The MAX6424UK21-T is a compact, high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a crucial function in ensuring system reliability and robustness by resetting the µP during power-up, power-down, and brownout conditions. With its small SOT23 package, it is an ideal solution for space-constrained applications that require the highest level of system stability.

This device features a factory-trimmed reset threshold voltage of 2.10V, making it suitable for monitoring 2.5V power supply voltages. The MAX6424UK21-T asserts a reset signal whenever the VCC supply voltage falls below the preset threshold, keeping the reset active for a minimum of 140ms after VCC has risen above the reset threshold. This ensures that the microprocessor has adequate time to stabilize and start up correctly.

The reset output from the MAX6424UK21-T is available in either active-low or active-high configurations, providing flexibility to interface with a variety of microprocessors and other digital systems. The active-low RESET output is guaranteed to be in the correct state for VCC down to 1.0V, which allows for reliable operation during low voltage conditions.

One of the key advantages of the MAX6424UK21-T is its low supply current of only 1.2µA, which helps to conserve battery life in portable applications. This makes it an excellent choice for battery-operated devices such as handheld computers, medical monitoring equipment, and portable communication devices.

The device also includes an integrated manual reset input, allowing for a system reset to be initiated by a user or external signal. This feature can be particularly useful during system maintenance or in the event of software anomalies.

Overall, the Maxim Integrated MAX6424UK21-T offers a simple and effective solution for system monitoring and reset functions, ensuring that digital systems remain operational and reliable under various voltage conditions.

For more information and complete specifications, please refer to the official Maxim Integrated MAX6424UK21-T datasheet.