Maxim Integrated MAX6864UK31D1S+ Microprocessor Reset Circuit

The Maxim Integrated MAX6864UK31D1S+ is a highly reliable and robust microprocessor (µP) supervisory circuit, designed to maintain system integrity by monitoring the power supply voltage in digital systems. This compact device ensures that microprocessors and other sensitive digital circuits operate correctly during power-up, power-down, and brown-out conditions. It is particularly well-suited for portable and battery-powered applications due to its small size and low power consumption.

With a factory preset threshold voltage of 3.1V, the MAX6864UK31D1S+ actively monitors the VCC line and provides a reset signal to the connected µP whenever the supply voltage falls below the threshold. The reset output remains asserted for a minimum reset timeout period after VCC has risen above the reset threshold, ensuring that the µP has adequate time to initialize and stabilize. The reset timeout period is also factory-set, offering a precise delay typically in the order of milliseconds.

This device comes in a compact SOT-23 package, making it an excellent choice for space-constrained applications. It features an open-drain reset output, which allows for the flexibility of connecting to different logic levels and interfacing with other components within a system. The open-drain configuration also enables wired-OR connections for additional monitoring points or for coordinating resets among multiple devices.

Furthermore, the MAX6864UK31D1S+ includes additional features like a debounced manual reset input, allowing for a manual system reset when necessary. This input can be triggered by an external switch or logic signal, providing a convenient way to reset the system without cycling the power.

Maxim Integrated has designed this device with reliability in mind, incorporating features such as low supply current, which extends battery life, and immunity to short VCC transients, ensuring consistent performance even in noisy environments. The MAX6864UK31D1S+ is a critical component for any system requiring high reliability and precision monitoring of the power supply to safeguard against data loss and hardware damage.

Overall, the MAX6864UK31D1S+ is an essential component for designers looking to enhance the reliability and stability of their digital systems, particularly in portable and space-sensitive applications.