Maxim Integrated DS1390U-33+T Low-Voltage SPI/3-Wire RTCs

The DS1390U-33+T from Maxim Integrated is a highly integrated real-time clock (RTC) specifically designed to provide a comprehensive timekeeping solution in a variety of applications. This device is part of the family of low-voltage serial real-time clocks that operate on a full SPI or 3-wire interface. With its compact and efficient design, the DS1390U-33+T is ideal for portable devices, industrial equipment, and any system where accurate timekeeping is crucial.

The DS1390U-33+T operates at a voltage range of 2.97V to 5.5V, making it suitable for systems that run on standard 3.3V or 5V power supplies. The inclusion of a trickle-charge capability ensures that the RTC can be maintained by a backup power source, such as a coin cell, during periods when the main power is unavailable. This feature is critical for maintaining accurate timekeeping and avoiding system disruptions or data loss.

One of the key features of the DS1390U-33+T is its full binary-coded decimal (BCD) clock/calendar with 56 bytes of NV SRAM. This allows for precise time and date tracking, including seconds, minutes, hours, day, date, month, and year, with leap-year compensation valid up to the year 2100. The non-volatile SRAM provides a secure and reliable way to store critical data, which will not be lost even when power is removed.

Furthermore, the DS1390U-33+T offers a programmable square-wave output that can be used for various timing and control applications. This versatile signal can be set to multiple frequencies, providing a flexible tool for system synchronization and scheduling tasks.

For ease of integration, the DS1390U-33+T is available in a surface-mountable μSOP package. This small footprint package allows for efficient use of PCB space, which is essential in modern compact electronic designs.

Overall, the Maxim Integrated DS1390U-33+T offers a robust and reliable timekeeping solution with its low-voltage operation, backup power capabilities, precision time/calendar functions, and programmable outputs, making it an excellent choice for designers looking to enhance their systems with accurate timekeeping functionality.