Maxim Integrated MAX6380XR46+T Microprocessor Reset Circuit

The Maxim Integrated MAX6380XR46+T is a compact, highly precise microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of system reliability and accuracy required in critical applications, ensuring that the µP and other devices are reset properly during power-up, power-down, and brown-out conditions.

This device is part of the MAX6380 series and comes in a tiny, 3-pin SC70 package, making it ideal for space-constrained applications. The MAX6380XR46+T operates with a nominal threshold voltage of 4.63V, ensuring that systems with a 5V power supply are closely monitored and maintained within their operational limits.

One of the key features of the MAX6380XR46+T is its ability to provide a precise monitoring function without the need for external components, simplifying the design and reducing the overall bill of materials. It offers a reset output stage that can be either active-high or active-low, which is guaranteed to be in the correct state for VCC down to 1V, allowing for a wide range of power supply conditions. The device also boasts a low supply current of 8µA (typical), making it an energy-efficient choice for portable and battery-operated applications.

The reset timeout period of the MAX6380XR46+T is internally set to a typical value of 280ms, providing a sufficient delay to ensure system stability during power-up. The device's built-in hysteresis helps to prevent spurious resets caused by noise and transients on the VCC line.

Additionally, the MAX6380XR46+T features an immunity to short VCC transients, and its reset output is capable of sinking 5.5mA, allowing it to drive load directly if necessary. This robust design ensures reliable operation even under harsh conditions and is suitable for a wide range of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment.

Overall, the Maxim Integrated MAX6380XR46+T is a versatile and reliable solution for system designers looking to enhance the operational stability and integrity of their digital systems.