The MAX6443US29L+T is a microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems that require battery backup. This supervisory IC is ideal for portable equipment, computers, controllers, and intelligent instruments.

Key Features

• Voltage Monitoring: This device keeps a close watch on the system voltage, ensuring that the connected µP is reset to a known state during power-up, power-down, or brown-out conditions. It has a factory preset reset threshold voltage of 2.925V, tailored for 3V systems.
• Battery Backup Switching: The MAX6443US29L+T includes an automatic backup battery switchover feature that allows for a seamless transition between primary power and backup power in the event of a primary power failure, ensuring uninterrupted operation.
• Low Power Consumption: With its low supply current of 1.2µA, this IC is optimized for battery-powered applications, extending the life of the backup battery.
• Manual Reset Input: A manual reset input is provided, allowing for a system reset to be initiated with an external button or signal.
• Compact Package: The device comes in a compact SOT-143 package, saving valuable board space in space-constrained applications.

Applications

The versatility of the MAX6443US29L+T makes it suitable for a wide range of applications. It is commonly used in:

• Portable/Battery-Powered Equipment
• Computers and Servers
• Embedded Controllers
• Intelligent Instruments
• Automotive Systems

Maxim Integrated's commitment to high-quality and reliable integrated circuits is evident in the MAX6443US29L+T. This IC is a practical solution for designers looking to enhance system integrity and prolong battery life in their electronic designs.