Product Overview: Maxim Integrated MAX809LEUR

The MAX809LEUR is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant function in ensuring system stability by triggering a reset if the supply voltage drops below a predetermined threshold. This feature is essential for preventing system failures and maintaining data integrity during power-up, power-down, and brown-out conditions.

The device is tailored to maintain system robustness with its ability to assert a reset signal whenever the V_CC supply voltage falls below the factory-set reset threshold level. The reset output remains asserted for a minimum reset timeout period after V_CC rises above the reset threshold, ensuring the system microprocessor starts up correctly during power recovery. This reset timeout period is typically 140ms, which provides ample time for the system to stabilize.

The MAX809LEUR comes in a compact SOT-23 package, making it an excellent choice for space-constrained applications. Its low supply current of 17µA (typical) is another attractive feature, contributing to the efficiency of the overall system by minimizing power consumption.

Furthermore, the device's operation is guaranteed over the full temperature range of -40°C to +105°C, ensuring reliability in various environmental conditions. This wide operating temperature range, combined with its power-saving features, makes the MAX809LEUR suitable for portable and battery-operated devices.

The MAX809LEUR is an active-low reset circuit, which means that the reset signal is asserted (logic low) when a reset condition is detected. It is designed with precision, featuring a factory-trimmed reset threshold voltage for high accuracy. Additionally, the device is designed to ignore fast transients on the V_CC, which adds to its robustness in noisy environments.

In summary, Maxim Integrated's MAX809LEUR is a dependable and efficient solution for system monitoring, offering low power consumption, high accuracy, and a compact footprint, making it a top choice for designers looking to enhance the reliability of their digital systems.