Maxim Integrated MAX6315US44D4+T Low-Power Microprocessor Reset Circuit

The MAX6315US44D4+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events in digital systems. Manufactured by Maxim Integrated, a leader in analog and mixed-signal engineering, this device is an essential component for a wide range of applications, from portable devices to complex digital electronics requiring precise monitoring and control of the power supply voltage.

This reset circuit is specifically engineered to monitor the power supply voltage of µP and digital systems. It provides a quick and accurate response by asserting a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold level. The reset output remains asserted for a minimum reset timeout period after VCC has risen above the reset threshold, ensuring the system has adequate time to stabilize before resuming operation. This feature helps prevent erroneous operation during power-up, power-down, or brownout conditions.

The MAX6315US44D4+T comes in a compact, 4-pin SOT-143 package, making it suitable for space-constrained applications. It is characterized for operation over the full industrial temperature range (-40°C to +85°C), which ensures reliable performance in harsh environments. The device is also available with preset reset threshold voltages, allowing designers to select the appropriate version tailored to their specific system requirements.

One of the key advantages of the MAX6315 series is its low power consumption. With a typical supply current of only 1µA, this reset circuit is ideal for battery-operated equipment, where power efficiency is crucial. Additionally, the device includes an active-low RESET output, which is guaranteed to be in the correct state for VCC down to 1V, further enhancing the reliability of the overall system.

The MAX6315US44D4+T is offered in a tape-and-reel format denoted by the "+T" suffix, facilitating automated assembly and making it a practical choice for high-volume production environments. With its robust feature set and Maxim Integrated's reputation for quality, this reset circuit is an excellent choice for designers looking to enhance the reliability and performance of their digital systems.