Maxim Integrated MAX6348XR40-T Microprocessor Reset Circuit

The MAX6348XR40-T from Maxim Integrated is a compact, highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events. This device is particularly suitable for portable and space-constrained applications due to its small size and low power consumption.

With a preset reset threshold voltage of 4.0V, the MAX6348XR40-T ensures that the µP and other critical system components reset cleanly during power-up, power-down, or brownout conditions. The device operates with a supply voltage range from 1.2V to 5.5V, making it versatile for various low voltage applications.

One of the key features of this supervisory circuit is its ability to provide a precise reset output without external components, which simplifies design and reduces component count. The reset output remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold level, ensuring adequate time for the system to stabilize.

The MAX6348XR40-T offers a low supply current of only 1.2µA, making it an energy-efficient choice for battery-powered devices. Its tiny SOT-23 packaging allows for high-density PCB layouts, which is crucial in today's miniaturized electronic products.

Additional advantages of the MAX6348XR40-T include its immunity to short V_CC transients, which helps in maintaining stable operation during fluctuating power conditions. The device also features a debounced manual reset input, providing a simple and effective way for the user to initiate a system reset manually.

This reset circuit is designed for a wide range of applications, including computers, controllers, intelligent instruments, portable/battery-powered equipment, and other microprocessor-based systems that require a reliable reset function.

The MAX6348XR40-T is available in a 3-pin SOT-23 package, identified by the suffix 'T' for tape and reel packaging, which facilitates automated assembly processes. Maxim Integrated's commitment to quality and reliability ensures that this reset circuit will provide a robust solution for maintaining system integrity across various applications.

For detailed specifications and application guidance, designers are encouraged to consult the datasheet and Maxim Integrated's technical support resources.