Maxim Integrated MAX6319LHUK31A+T Microprocessor Reset Circuit

The MAX6319LHUK31A+T is a highly precise and reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant level of protection against the loss of code execution integrity due to power supply glitches or failures. This device is particularly suited for use in systems that require a high degree of operational stability and accuracy.

One of the key features of the MAX6319LHUK31A+T is its ability to assert a reset signal whenever the VCC supply voltage falls below a preset threshold, ensuring that the µP resets cleanly during power-up, power-down, and brownout conditions. The reset output remains asserted for a minimum timeout period after VCC has risen above the reset threshold level, providing the system with ample time to stabilize before the processor starts its operation.

This supervisory circuit is available in a compact SOT-23 package, making it ideal for space-constrained applications. The MAX6319LHUK31A+T comes with a factory-trimmed reset threshold voltage of 3.10V, which is suitable for operation with a variety of 3.3V-powered digital systems. The device also features low supply current, consuming only 1.5µA (typical) of supply current, which is beneficial for battery-powered portable devices where power efficiency is crucial.

The MAX6319LHUK31A+T also includes additional features such as a debounced manual reset input which allows for a manual system reset. It also offers an active-low reset output, which is guaranteed to be in the correct state for VCC down to 1V, ensuring reliable system reset operation even during low voltage conditions.

With its combination of high accuracy, low power consumption, and small footprint, the MAX6319LHUK31A+T is an excellent choice for managing system resets in microprocessor-based systems, from consumer electronics to industrial controls. It ensures that digital systems maintain their integrity and continue to operate smoothly across a wide range of power supply conditions.