Maxim Integrated MAX802MCPA+ Microprocessor Supervisory Circuit

The MAX802MCPA+ is a precision microprocessor supervisory circuit designed by Maxim Integrated to monitor power supplies in microprocessor systems. It provides a critical function by ensuring that the microprocessor and its associated circuitry have a stable and reliable power supply, which is essential for maintaining system integrity and preventing data corruption.

This supervisory circuit offers a combination of features that make it an excellent choice for a wide range of applications, including computers, controllers, intelligent instruments, and portable battery-powered equipment. Its primary function is to reset the microprocessor during power-up, power-down, and brownout conditions, thereby ensuring that the system starts in a known state.

The MAX802MCPA+ features an active-low reset output, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This delay provides the system with ample time to stabilize before the microprocessor begins to execute code. The reset threshold voltage for the MAX802MCPA+ is preset at the factory and is available in several standard voltages, accommodating different microprocessor requirements.

Additional features of the MAX802MCPA+ include a low supply current of only 40µA, which is particularly beneficial for battery-powered applications where power efficiency is critical. The device operates over a wide voltage range of 1.0V to 5.5V, making it versatile for various system voltages. Moreover, its compact 8-pin DIP (Dual In-line Package) or SO (Small Outline) package allows for easy integration into system designs without taking up significant board space.

The MAX802MCPA+ provides a reliable and cost-effective solution for system designers looking to enhance the operational stability of their microprocessor-based systems. By monitoring the supply voltage and ensuring the microprocessor starts correctly every time, the MAX802MCPA+ helps to prevent system failures and data loss, contributing to the overall robustness of the application it serves.