Maxim Integrated MAX6383XR22D3 Microprocessor Reset Circuit

The MAX6383XR22D3 from Maxim Integrated is a highly reliable and compact microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant safeguard for ensuring the correct operation of microprocessors by resetting them during power-up, power-down, and brown-out conditions. With its precision monitoring capability, it helps maintain system integrity and prevents software corruption.

This particular model, the MAX6383XR22D3, comes with a factory-set reset threshold voltage of 2.2V, which is suitable for low-voltage applications. The device operates with a supply voltage range from 1.1V to 5.5V, making it versatile for various electronic components and systems. Its low supply current of 1.2µA (typical) ensures minimal power consumption, contributing to the energy efficiency of the overall system.

One of the key features of the MAX6383XR22D3 is its reset timeout period of 140ms (min), which provides a sufficient delay to ensure the power supply has stabilized before allowing the processor to resume operation. This timing precision is crucial for preventing system errors that might occur if the µP were to start with an unstable power supply.

The device comes in a tiny, 3-pin SC70 package, making it ideal for space-constrained applications. Its small footprint does not compromise its performance and reliability, which are hallmarks of Maxim Integrated's products. Additionally, the MAX6383XR22D3 includes an active-low RESET output, which remains asserted for the duration of the timeout period after V_CC falls below the reset threshold.

With its built-in thermal overload protection, the MAX6383XR22D3 ensures that the device and the systems it protects are not damaged by excessive temperatures. This feature, along with its power supply transient immunity, provides a robust solution for a wide range of applications, including portable/battery-powered equipment, computers, controllers, and intelligent instruments.

In summary, the Maxim Integrated MAX6383XR22D3 is an essential component for any system requiring reliable monitoring and management of power supply conditions. Its precision, low power consumption, and compact design make it an excellent choice for designers looking to enhance system stability and longevity.