Maxim Integrated's MAX6347UR46+T Microprocessor Reset Circuit

The MAX6347UR46+T is a highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events. Produced by Maxim Integrated, this device is engineered to monitor power supplies in µP and digital systems, providing a robust layer of protection against low voltage and other fault conditions. It is an essential component for applications requiring high precision and reliability.

This supervisory circuit offers a factory-trimmed reset threshold voltage of 4.63V, making it ideal for 5V-powered systems. It ensures that the µP resets properly during power-up, power-down, and brown-out conditions. Upon detecting a voltage below the designated threshold, the MAX6347UR46+T asserts a reset signal to prevent system errors. The reset output remains asserted for a minimum of 140ms after the supply voltage rises above the reset threshold, ensuring the µP has adequate time to stabilize.

One of the key features of the MAX6347UR46+T is its low supply current of just 1.2µA, which is highly beneficial for portable and battery-operated devices where power conservation is critical. Additionally, the device is available in a compact SOT-23 package, making it suitable for space-constrained applications.

Furthermore, the MAX6347UR46+T offers an active-low, push-pull reset output. This feature allows for a direct interface with a µP, without the need for external components, simplifying the design and reducing overall system cost. The device's temperature range of -40°C to +125°C ensures reliable operation across a wide range of environmental conditions, making it suitable for automotive and industrial applications.

With its precision voltage monitoring and low power consumption, the MAX6347UR46+T from Maxim Integrated is an excellent choice for designers looking to enhance the reliability and performance of their digital systems. Whether used in complex automotive electronics, portable devices, or critical industrial equipment, this supervisory circuit provides a simple, yet effective solution for maintaining system integrity.