Maxim Integrated MAX6316LUK45BX+ Microprocessor Reset Circuit

The MAX6316LUK45BX+ is a highly reliable, compact microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of system stability by performing a reset operation during power-up, power-down, and brownout conditions. With its small size and precision features, it is ideal for portable electronics, computers, controllers, and other microprocessor-based applications that require a dependable reset function.

This device operates with a nominal threshold voltage of 4.5V, making it suitable for 5V-powered circuits. It is designed to maintain system integrity by asserting a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold. The reset output remains asserted for a preset timeout period after VCC has risen above the reset threshold, ensuring the system has sufficient time to stabilize.

The MAX6316LUK45BX+ comes in a compact SOT-23 package, which is highly beneficial for space-constrained applications. Its low supply current of only 1.6µA (typ) makes it an energy-efficient choice for battery-operated devices. The device features an active-low, push-pull reset output, which provides a direct drive to a µP reset or other logic components.

Key features of the MAX6316LUK45BX+ include:

• Factory-set reset threshold voltage: 4.5V
• Low supply current: 1.6µA (typ)
• Guaranteed reset valid to VCC = 1V
• Preset reset timeout period: 280ms (min)
• Active-low, push-pull reset output
• Immune to short VCC transients
• Compact SOT-23 package

The device's immunity to short VCC transients ensures reliable operation under fluctuating power conditions. The MAX6316LUK45BX+ is designed to ignore fast transients on the VCC line, which prevents nuisance resets, thereby improving the overall robustness of the system it is protecting.

With its precision monitoring and low power consumption, the MAX6316LUK45BX+ from Maxim Integrated is an excellent choice for designers looking to enhance the reliability and performance of their microprocessor-based systems.