Maxim Integrated MAX823SEUK+T Microprocessor Supervisory Circuit

The Maxim Integrated MAX823SEUK+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial safeguard for systems by ensuring that the microprocessor is fully reset during power-up, power-down, and brown-out conditions. The device comes in a small, 5-pin SOT-23 package, making it ideal for space-constrained applications.

This supervisory circuit offers several key features that make it an essential component for system stability. It has a preset voltage threshold of 2.63V, which is monitored with precision. If the voltage drops below this threshold, the MAX823SEUK+T asserts a reset signal to prevent the µP from operating under unpredictable conditions. The reset output remains asserted for a minimum of 140ms after the supply voltage exceeds the reset threshold, ensuring a proper reset of the µP.

Another significant advantage of the MAX823SEUK+T is its low power consumption. With a quiescent current of only 1µA, it is suitable for portable battery-operated devices where power efficiency is critical. This feature helps extend the battery life of the applications it is used in.

The device also includes a manual reset feature. This allows a push-button or an external signal to initiate a system reset, providing an additional layer of control for system maintenance or debugging. The manual reset input is debounced, which means it filters out any spurious noise that could inadvertently cause a system reset.

Furthermore, the MAX823SEUK+T is designed to operate over a wide temperature range of -40°C to +85°C, making it suitable for industrial applications where temperature conditions can be extreme. The device's tolerance for harsh environments, combined with its small footprint and low power consumption, makes it an ideal choice for a variety of applications, including computers, controllers, intelligent instruments, portable devices, and other microprocessor-based systems.

In summary, the Maxim Integrated MAX823SEUK+T supervisory circuit is a reliable and efficient solution for system monitoring, offering features such as precision voltage monitoring, low power consumption, manual reset capability, and operation across a broad temperature range. Its small size and robust design make it a versatile component for ensuring the stability and proper functioning of digital systems.