Maxim Integrated's MAX810SEXR+T - Microprocessor Reset Circuit

The MAX810SEXR+T is a compact, highly reliable microprocessor (µP) supervisory circuit from Maxim Integrated, designed to monitor power supplies in digital systems. It ensures that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. This essential component is widely used in a variety of applications, including computers, controllers, intelligent instruments, and portable/battery-powered equipment.

Encased in a small SOT-323 package, the MAX810SEXR+T is engineered to provide a precision monitoring solution. It features an active-low reset output, with the reset signal being asserted when the V_CC supply voltage declines below the factory-set reset threshold level. The reset output remains asserted for a minimum reset timeout period after V_CC has risen above the reset threshold level, ensuring a proper system reset. This timeout period is typically 140ms, which allows the system's power supply and processor to stabilize before the system starts operating.

One of the key benefits of the MAX810SEXR+T is its low power consumption, making it ideal for power-sensitive applications. Its quiescent current is typically only 17µA, which helps to extend the battery life of portable devices. Additionally, the device operates over a wide voltage range, from 1.2V to 5.5V, allowing it to be used in systems with different power levels.

The MAX810SEXR+T also features an immunity to short V_CC transients, which helps in maintaining system stability and reliability. Its built-in hysteresis also prevents erratic resets from occurring in the presence of noise or rapidly changing V_CC conditions.

Maxim Integrated's commitment to quality ensures that the MAX810SEXR+T meets the high standards required for critical system monitoring tasks. Its temperature range from -40°C to +125°C allows it to operate reliably in extreme conditions, making it suitable for industrial and automotive applications as well.

In summary, the MAX810SEXR+T is a versatile, efficient, and reliable solution for system reset management, offering designers a compact and power-conserving option for maintaining the integrity of their digital systems.