Maxim Integrated MAX6420UK31+T Microprocessor Supervisory Circuit

The MAX6420UK31+T is a highly compact, low-power microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems that require voltage monitoring. This supervisory circuit is ideal for use in a wide range of applications, including portable/battery-powered equipment, computers, controllers, and intelligent instruments.

With a factory-trimmed reset threshold voltage of 3.1V, the MAX6420UK31+T ensures that systems operate within their specified voltage levels, and it generates a reset signal whenever the VCC supply voltage falls below this preset threshold. The reset output remains asserted for a minimum reset timeout period of 140ms after VCC has risen above the reset threshold, providing ample time for the system to stabilize before the processor is allowed to run.

Key features of the MAX6420UK31+T include a low supply current of only 1.2µA, which contributes to the energy efficiency of the overall system. This makes it particularly suitable for battery-powered applications where power conservation is critical. The device operates over a wide voltage range from 1.2V to 5.5V, allowing it to be used in a variety of power environments.

The MAX6420UK31+T comes in a small, 5-pin SOT23 package, making it an excellent choice for space-constrained applications. Its compact size, combined with its no external components requirement, allows for a simplified PCB layout and reduced system complexity. Additionally, the device is designed to be robust, offering over-temperature protection and ensuring reliable operation under varying conditions.

Overall, the Maxim Integrated MAX6420UK31+T supervisory circuit is a dependable solution for system designers looking to enhance the safety and stability of their microprocessor-based systems. Its precision voltage monitoring, low power consumption, and small footprint make it a versatile component for a multitude of electronic products.