Maxim Integrated's MAX6800UR40D3+T: A Reliable Microprocessor Reset Circuit

The MAX6800UR40D3+T is a compact, high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of reliability and stability, ensuring that your system operates smoothly even under varied and unpredictable conditions.

This device is specifically engineered to maintain system integrity by monitoring the power supply voltage. In the event of a power failure or an unexpected dip below a predetermined threshold, the MAX6800UR40D3+T asserts a reset signal to reset the µP, thereby preventing any malfunction or data corruption. The reset signal remains active for a minimum of 140ms after the supply voltage has risen above the reset threshold level, ensuring a proper system restart.

One of the key features of this supervisory circuit is its low supply current of just 1.2µA, which makes it an ideal choice for portable and battery-operated equipment. The low power consumption helps in extending the battery life of the device it is safeguarding. The MAX6800UR40D3+T operates over a wide voltage range of 1.2V to 5.5V, which allows for versatile applications across various electronic devices.

The device comes in a tiny, 3-pin SOT-23 package, allowing for high-density PCB layouts. Its small size is particularly beneficial for space-constrained applications. The MAX6800UR40D3+T has a preset reset threshold voltage of 4.0V, which is suitable for systems that operate around this voltage level.

Another advantage of the MAX6800UR40D3+T is its accuracy. The reset threshold voltage is accurate to ±2% over temperature, which means that the device can reliably monitor the power supply without false triggering over the full temperature range of -40°C to +125°C. This precision is crucial for systems that require consistent performance regardless of external conditions.

Overall, the MAX6800UR40D3+T from Maxim Integrated is a robust and precise solution for power monitoring in microprocessor-based systems. Its low power consumption, small package size, and high accuracy make it an excellent choice for ensuring the reliability of electronic devices.