The MAX809RW is a precision microprocessor (μP) supervisory circuit developed by NXP Semiconductors, designed to monitor power supplies in digital systems. It provides a significant function by ensuring that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. The device is highly integrated and offers a cost-effective solution for improving system reliability and operation.

Key Features

• Voltage Monitoring: The MAX809RW is adept at monitoring the system voltage. It asserts a reset signal whenever the VCC supply voltage declines below the factory-programmed threshold, ensuring the system has a stable supply before continuing operation.
• Programmable Reset Timeout: It comes with a programmable delay time for the reset signal, which provides designers with flexibility in setting the reset assertion duration suitable for their specific application.
• Low Power Consumption: With its low power consumption, the device is ideal for power-sensitive applications, contributing to the overall energy efficiency of the system it is a part of.
• High Accuracy: The reset threshold voltage is factory-set with high accuracy, which means that the MAX809RW can reliably detect out-of-tolerance power supply conditions.
• Manual Reset Input: An additional feature includes a manual reset input, allowing for a system reset to be initiated by external hardware or software, offering an extra layer of control.

Applications

The MAX809RW is versatile and can be used in a wide array of applications. It is particularly useful in microprocessor-based systems, computers, embedded systems, and portable/battery-powered equipment. Its role in ensuring a stable system operation makes it an essential component in critical applications where data integrity and system reliability are of utmost importance.

Product Specifications

Parameter Value Package SOT-23 Operating Temperature -40°C to +125°C Supply Voltage Range 1.0V to 5.5V Reset Threshold Accuracy ±1.5% Reset Active Timeout Period Programmable

With its robust feature set and high reliability, the MAX809RW from NXP stands out as a crucial component for any system requiring effective power supply monitoring and management.