Maxim Integrated MAX810MEXR-T Microprocessor Reset Circuit

The MAX810MEXR-T from Maxim Integrated is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial function in ensuring system stability by delivering an active-low reset signal whenever the VCC supply voltage drops below a preset threshold. This reset signal maintains its state for a minimum period after VCC has risen above the reset threshold, providing a stable system reset to the microprocessor during power-up, power-down, or brown-out conditions.

This device is particularly well-suited for portable and battery-powered applications due to its low power consumption and small size. The MAX810MEXR-T is available in a 3-pin SOT-23 package, which is ideal for space-constrained applications. It operates over a wide supply voltage range from 1.2V to 5.5V, making it versatile for various digital systems.

Key features of the MAX810MEXR-T include:

• A precise factory-set VCC reset threshold to ensure reliable monitoring without the need for external components.
• An active-low RESET output that remains asserted for a minimum of 140ms (typical) after VCC has risen above the reset threshold, providing a proper reset signal to the µP during power-up.
• Low supply current of 17µA (typical) at VCC = 3.3V, which helps to extend battery life in portable devices.
• Immunity to short VCC transients, ensuring that the device will not generate false resets from glitches on the VCC line.
• Capability to operate over a broad temperature range of -40°C to +125°C, making it suitable for industrial and automotive applications.

The MAX810MEXR-T offers a robust and straightforward solution for system designers looking to enhance the reliability of their microprocessor-based systems. With its precision voltage monitoring and low power consumption, it is an essential component for maintaining the integrity of digital systems, particularly when they are subject to variable power conditions.

For more information on integrating the MAX810MEXR-T into your design, consult the comprehensive datasheet provided by Maxim Integrated, which includes detailed specifications, application notes, and usage guidelines.