Maxim Integrated MAX6821SUK+T Microprocessor Supervisory Circuit

The Maxim Integrated MAX6821SUK+T is a highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events in digital systems. This compact and efficient device is housed in a 5-pin SOT-23 package, making it suitable for space-constrained applications.

The MAX6821SUK+T provides a multitude of features that ensure the proper functioning of microprocessor systems by monitoring the power supply voltage. It asserts a reset signal to the µP during power-up, power-down, and brownout conditions. The reset output remains asserted until the supply voltage reaches the factory-set reset threshold level and maintains it for a minimum reset timeout period after VCC has risen above the reset threshold, ensuring a proper system restart.

One of the key features of the MAX6821SUK+T is its precision factory-set VCC reset threshold, which offers a variety of options to cater to specific system requirements. The device also includes a manual reset input, allowing for a system reset to be triggered with an external push-button or logic signal. This manual reset feature is debounced and guarantees a clean reset signal to the µP.

With its low supply current of only 5µA (typical), the MAX6821SUK+T is an energy-efficient choice for battery-operated devices. The supervisory circuit operates over a wide voltage range, typically from 1.2V to 5.5V, which makes it versatile for various applications, including portable electronics, computers, controllers, and intelligent instruments.

The device offers additional protection by providing an active-low reset output, which is guaranteed to be in the correct state for VCC down to 1.0V. This ensures compatibility with low-voltage systems and enhances the reliability of the system under supervision.

Overall, the Maxim Integrated MAX6821SUK+T is an essential component for system designers looking to enhance the reliability and performance of their microprocessor-based systems. Its small size, precision monitoring capabilities, and low power consumption make it an ideal choice for a wide range of applications.