Maxim Integrated MAX6422XS16+T Microprocessor Supervisory Circuit

The MAX6422XS16+T is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of protection for your system by ensuring that the µP boots up in a predictable state every time. This supervisory circuit is an essential component for any system that requires a high degree of operational stability and integrity.

With its compact and efficient design, the MAX6422XS16+T is ideal for portable and space-constrained applications. It is available in a small, 4-pin SC70 package, which is excellent for systems where board space is at a premium. Despite its small size, this supervisory circuit does not compromise on performance and reliability.

The key feature of the MAX6422XS16+T is its ability to monitor the system voltage with a precision threshold. When the voltage drops below a preset threshold, the circuit generates a reset signal that holds the µP in reset until the system voltage stabilizes. This reset signal remains active for a minimum of 140ms after the supply voltage exceeds the reset threshold, ensuring the system has adequate time to stabilize before the µP starts up. This feature is crucial for preventing system errors and data corruption during power-up, power-down, and brown-out conditions.

The MAX6422XS16+T operates over a wide voltage range of 1.2V to 5.5V, making it suitable for a variety of power supply configurations. It also offers low supply current, consuming only 6µA (typical) of supply current, which is beneficial for battery-powered applications where power efficiency is crucial.

Additional features of this supervisory circuit include a debounced manual reset input, which allows for a manual system reset, and an active-low push-pull reset output, which provides a direct interface to the µP reset input without requiring external components. The MAX6422XS16+T is specified for the extended temperature range of -40°C to +125°C, ensuring reliable operation in harsh environments.

With its precision monitoring capabilities and robust feature set, the Maxim Integrated MAX6422XS16+T supervisory circuit is an excellent choice for ensuring the reliability and stability of your digital systems.