Maxim Integrated MAX6339DUT+T Microprocessor Supervisory Circuit

The MAX6339DUT+T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant layer of protection by ensuring that the µP boots up in a known state and operates within acceptable voltage levels. The device is particularly ideal for portable and battery-operated equipment due to its low power consumption and compact SOT23-6 package.

This supervisory circuit offers a variety of features that make it a versatile component for system management. It monitors the system voltage from a fixed threshold that ranges from 1.58V to 5.0V, catering to a wide array of supply voltages. When the monitored voltage falls below the factory-set reset threshold, the MAX6339DUT+T asserts a reset signal, holding the µP in a reset state for a minimum of 140ms after the supply voltage exceeds the reset threshold. This ensures that the system has adequate time to stabilize before the processor starts to execute code.

One of the key benefits of the MAX6339DUT+T is its low supply current of 1.2µA (typical), which helps to extend battery life in portable applications. The device also features a debounced manual reset input, allowing for a manual system reset. Furthermore, the reset output stage can be configured as either push-pull or open-drain, providing flexibility in interfacing with different types of µP systems.

The MAX6339DUT+T operates over a wide temperature range of -40°C to +125°C, making it suitable for use in harsh environments. Its tolerance for high temperatures, combined with the small SOT23-6 package, makes it an excellent choice for space-constrained applications where thermal management is a concern.

In summary, the Maxim Integrated MAX6339DUT+T is a robust and versatile supervisory circuit that provides essential monitoring and protection for microprocessor systems. Its low power consumption, flexible output configurations, and wide operating temperature range make it a smart choice for designers looking to enhance system reliability in both portable and industrial applications.