Maxim Integrated's MAX6381XR31D2+T Microprocessor Reset Circuit

The MAX6381XR31D2+T by Maxim Integrated is a compact, high-precision microprocessor (μP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of system reliability through its reset function, ensuring that the μP boots up in a known state every time. This particular device is engineered to maintain system integrity by monitoring the VCC voltage level and issuing a reset signal whenever the VCC drops below the factory-set reset threshold level of 3.1V.

Encased in a small, 3-pin SC70 package, the MAX6381XR31D2+T is a space-saving solution that is perfect for portable devices where space is at a premium. The device is also available in a SOT23 package, offering flexibility for different design layouts. This reset circuit is ideal for use in a variety of applications, including computers, controllers, intelligent instruments, portable/battery-powered equipment, and other microprocessor-based systems.

The MAX6381XR31D2+T features an active-low, push-pull reset output. The reset output remains asserted for a minimum reset timeout period of 140ms after VCC has risen above the reset threshold level, ensuring that the system has sufficient time to stabilize before the processor starts. This timeout period helps prevent system errors that can occur if the supply voltage drops briefly or if the system experiences power-on transients.

With its low supply current of 1.1μA at +25°C, the MAX6381XR31D2+T is an energy-efficient choice for battery-operated devices. It operates over a wide temperature range of -40°C to +125°C, making it suitable for use in harsh environments. The device's immunity to short VCC transients and built-in debouncing contribute to its robustness and reliability.

Maxim Integrated's commitment to quality ensures that the MAX6381XR31D2+T meets stringent performance standards. Its precision voltage monitoring capability and robust feature set make it an essential component for any system requiring reliable reset functionality.