Maxim Integrated MAX6811LEUS+T Microprocessor Reset Circuit

The MAX6811LEUS+T from Maxim Integrated is a highly reliable, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant level of system reliability through its ability to reset a system during power-up, power-down, and brownout conditions. With its compact form factor, the MAX6811LEUS+T is available in a 4-pin SOT143 package, making it ideal for space-constrained applications.

This microprocessor reset circuit operates with a supply voltage range from 1V to 5.5V, making it versatile for various low voltage applications. It consumes minimal power, with a typical supply current of only 1µA, which is essential for battery-operated devices. The MAX6811LEUS+T features an active-low reset output, which holds the µP in the reset state until the system voltage reaches the reset threshold level and then keeps it in reset for at least 140ms after the system voltage becomes stable.

The device boasts a factory-trimmed reset threshold voltage, ensuring accurate monitoring of the power supply without external adjustments. This precise voltage monitoring helps to prevent system errors and malfunctions that can occur due to unpredictable power supply conditions. The MAX6811LEUS+T is designed to ignore fast transients on the power supply, enhancing system stability and reliability.

One of the key benefits of the MAX6811LEUS+T is its immunity to short V_CC transients, thanks to a built-in debounce timer. This feature ensures that the reset output will remain in the correct state during brief periods of power loss or dips, providing a stable operating environment for the microprocessor.

Maxim Integrated's MAX6811LEUS+T is suitable for a wide range of applications, including portable/battery-powered equipment, computers, controllers, intelligent instruments, and critical µP power monitoring. With its robust feature set and compact size, this microprocessor reset circuit is an excellent choice for designers seeking to enhance the reliability and performance of their digital systems.