Maxim Integrated MAX6444US16L+T Battery Backup IC

The MAX6444US16L+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 maintain a stable system operation by resetting the µP during power-up, power-down, and brownout conditions.

This supervisory circuit features a factory-trimmed reset threshold voltage of 1.575V, tailored to ensure precision monitoring of 1.8V power supplies. The reset output is available in an active-low, push-pull configuration, which eliminates the need for an external pull-up resistor and makes it suitable for power-sensitive applications. The reset signal is guaranteed to remain asserted for a minimum of 140ms (typical) after V<sub>CC has risen above the reset threshold level, providing ample time for the system to stabilize.

The compact SOT-23 package of the MAX6444US16L+T makes it an ideal choice for space-constrained applications. It operates over a wide temperature range of -40°C to +85°C, ensuring consistent performance across various environmental conditions. The low supply current of 6µA (typical) makes it suitable for battery-operated devices where power efficiency is crucial.

Additional features include a debounced manual reset input that allows for a manual system reset, which can be triggered by an external pushbutton or logic signal. This input is also internally pulled up to V<sub>CC, reducing the need for external components.

The MAX6444US16L+T is an ideal solution for portable consumer electronics, computers, controllers, and other digital devices that require a high level of power supply integrity. Its combination of low power consumption, small footprint, and precision voltage monitoring makes it an essential component for enhancing system reliability and safeguarding against unexpected power disruptions.

With Maxim Integrated's commitment to quality and durability, the MAX6444US16L+T supervisory circuit stands as a robust choice for designers looking to improve the safety and stability of their digital systems.