Maxim Integrated MAX810REUR Microprocessor Reset Circuit

The MAX810REUR from Maxim Integrated is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant degree of reliability and precision, ensuring that the µP and its associated circuitry reset cleanly during power-up, power-down, and brown-out conditions.

This device is specifically tailored to maintain system integrity by asserting a reset signal whenever the V_CC supply voltage falls below a preset threshold. The reset signal continues to be asserted for a minimum of 140ms after V_CC has risen above the reset voltage threshold, providing ample time for the system to stabilize.

Key Features:

• Precision Monitoring: The MAX810REUR features a factory-trimmed reset threshold, making it suitable for monitoring 3.3V power supplies.
• Low Power Consumption: With its low supply current of 17µA (typical), it is an ideal choice for power-sensitive applications.
• Manual Reset Input: A manual reset input is provided, allowing for a reset to be triggered with an external push-button or logic signal.
• Reset Output Stage: The reset output is active-low and can be connected directly to the reset input of the µP, ensuring a clear and defined logic level.

Applications:

The MAX810REUR is versatile and can be used in a variety of applications where reliable system operation is critical. Common applications include:

• Computers and servers
• Embedded systems
• Portable/battery-powered equipment
• Industrial controllers

Available in a small SOT-23 package, the MAX810REUR is designed for space-constrained applications. Its robust design and wide operating temperature range make it suitable for use in challenging environments.

With the MAX810REUR, designers can enhance system reliability and reduce the complexity of monitoring power supplies in their digital systems, making it an essential component for any application requiring stable operation and controlled system reset functionality.