Maxim Integrated DS1391U-3+T&R Real-Time Clock

The DS1391U-3+T&R from Maxim Integrated is a highly precise, full-featured real-time clock (RTC) module designed to provide timekeeping functionality in a broad range of electronic applications. With its compact surface-mount package, this RTC is ideal for use in space-constrained environments where accurate timekeeping is essential.

This device offers a multitude of features, such as a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, ensuring uninterrupted timekeeping. The DS1391U-3+T&R maintains seconds, minutes, hours, day, date, month, and year information, with the added ability to account for leap years up to the year 2100.

The RTC operates over the standard industrial temperature range and is connected through an I²C serial interface, which simplifies integration into existing designs. The DS1391U-3+T&R is also equipped with a programmable square-wave output that can be used for various purposes, including timekeeping, periodic system wake-ups, or as an interrupt function.

Key features of the DS1391U-3+T&R include:

• Highly accurate timekeeping over temperature and voltage extremes
• Automatic backup to battery or supercapacitor on power loss
• I²C serial interface for easy integration
• Programmable square-wave output for additional functionality
• Low power consumption, making it suitable for battery-powered applications
• Surface-mount package for space-saving installation
• Compliant with RoHS and lead(Pb)-free standards

Applications for the DS1391U-3+T&R range from portable devices, such as handheld electronics and wearables, to more complex systems like networking equipment, industrial controllers, and data loggers. Its robust feature set and ease of use make it an excellent choice for any application requiring reliable timekeeping.

Maxim Integrated's commitment to quality ensures that the DS1391U-3+T&R real-time clock module is a reliable and durable component for maintaining time in your electronic designs. Whether you're developing consumer electronics, industrial solutions, or IoT devices, this RTC module can help keep your systems running on time, all the time.