Maxim Integrated MAX6806UR26-T Microprocessor Reset Circuit

The MAX6806UR26-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant level of protection to ensure that the system operates effectively by issuing a reset signal whenever the VCC supply voltage falls below a preset threshold. This feature helps maintain the integrity of the processor system by preventing code execution errors during power-up, power-down, or brownout conditions.

This particular model, the MAX6806UR26-T, comes in a tiny SOT-23 package, making it an ideal choice for space-constrained applications. It has a fixed factory-set reset threshold voltage of 2.63V, tailored for systems that operate around a 2.6V power supply level. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold, ensuring that the system has sufficient time to stabilize before the processor begins operation.

One of the key features of the MAX6806UR26-T is its low supply current of only 5.5µA, which is particularly advantageous for battery-operated equipment where power efficiency is crucial. This low power consumption extends the battery life, making the device suitable for portable and remote applications.

The device's reset output is push-pull, which eliminates the need for an external pull-up resistor and further simplifies the circuit design. Additionally, the MAX6806UR26-T is capable of operating over a wide temperature range of -40°C to +125°C, allowing its use in environments with extreme temperature conditions.

Overall, the MAX6806UR26-T from Maxim Integrated is a robust and reliable solution for system monitoring, offering a simple yet effective way to safeguard microprocessor systems against the dangers of unpredictable power supply levels. Its small footprint, low power consumption, and precision voltage monitoring make it an excellent choice for a wide range of applications, including portable devices, embedded systems, and other digital electronics requiring a high level of system stability.