Maxim Integrated's MAX6800UR31D3+T Microprocessor Reset Circuit

The MAX6800UR31D3+T is a compact, highly reliable microprocessor (μP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It ensures that the microprocessor is reset to a known state during power-up, power-down, and brown-out conditions. This tiny device is an essential component for maintaining system integrity and preventing software execution errors due to insufficient power supply voltages.

Encased in a 3-Pin SOT-23 package, the MAX6800UR31D3+T offers an active-low reset output. It has a factory preset reset threshold voltage of 3.08V, which makes it suitable for 3.3V-powered systems. The reset output remains asserted for a minimum reset timeout period of 140ms after V_CC has risen above the reset threshold, providing ample time for the system to stabilize before the processor starts its operation.

One of the key features of the MAX6800UR31D3+T is its low power consumption. With a quiescent current of only 1.6μA at V_CC = 3.3V, it is an excellent choice for portable and battery-powered applications where power efficiency is crucial. Moreover, the device operates over a wide voltage range from 1.2V to 5.5V, giving it the flexibility to be used in various systems with different power requirements.

Maxim Integrated has designed the MAX6800UR31D3+T with an immunity to short V_CC transients, making it robust in environments where power supply noise is a concern. Additionally, the device is characterized for operation over the extended industrial temperature range of -40°C to +125°C, which allows it to be used in harsh industrial environments without compromising its performance.

The MAX6800UR31D3+T is available in a tape-and-reel form, denoted by the "+T" suffix, making it suitable for automated production processes. This product is ideal for use in applications such as computers, controllers, intelligent instruments, portable devices, and other digital systems that require a reliable reset function to ensure proper operation and system stability.