Maxim Integrated MAX6382XR26D3 Microprocessor Reset Circuit

The MAX6382XR26D3 is a compact, high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a reliable solution to ensure that microprocessors and other sensitive digital devices operate correctly during power-up, power-down, and brown-out conditions. This device is particularly useful in applications where maintaining the integrity of operational data and ensuring a controlled system restart is crucial.

One of the key features of the MAX6382XR26D3 is its ability to assert a reset signal whenever the VCC supply voltage falls below its preset threshold of 2.6V. The reset output remains asserted for a minimum timeout period of 140ms after VCC has risen above the reset threshold, ensuring a proper system reset. This timeout period allows the power supply and the µP to stabilize before resuming operation.

The device comes in a tiny, 3-pin SC70 package, making it ideal for space-constrained applications. Despite its small size, it offers excellent performance with a low supply current of only 1.1µA, which is beneficial for battery-powered and portable devices where power efficiency is a concern.

Furthermore, the MAX6382XR26D3 features an active-low, push-pull reset output. This design means the reset output directly drives the reset input of the µP without requiring an external pull-up resistor, simplifying circuit design and reducing component count. The device's robustness is enhanced with its capability to reject fast transient glitches on the VCC line, ensuring that the reset output is only asserted during genuine power-fail events.

Maxim Integrated's commitment to quality and reliability is evident in the MAX6382XR26D3, which is specified over the extended -40°C to +125°C temperature range. This makes it suitable for use in various environments, from industrial to automotive applications. With its precise voltage monitoring and low power consumption, the MAX6382XR26D3 is an excellent choice for designers looking to improve the reliability and performance of their digital systems.

Overall, the MAX6382XR26D3 is a testament to Maxim Integrated's expertise in power management and integrated circuits, offering a simple yet effective solution for µP system monitoring and protection.