Maxim Integrated DS1338U-3+T&R Real-Time Clock (RTC)

The DS1338U-3+T&R is a highly integrated, I2C-compatible real-time clock (RTC) from Maxim Integrated designed to provide precise time and date information for a wide range of applications. This RTC is particularly suitable for systems that require an accurate time base for time-stamping, event scheduling, or real-time clock functions without the complexity of a full-feature RTC.

The DS1338U-3+T&R comes in an ultra-small 8-pin µSOP package, making it an ideal choice for space-constrained applications. It operates over a wide voltage range of 2.0V to 5.5V, which allows for flexibility in power supply design and ensures compatibility with both 3.3V and 5V systems.

One of the key features of the DS1338U-3+T&R is its automatic power-fail detect and switch circuitry. This feature ensures that timekeeping continues uninterrupted during power failures by automatically switching to a backup power supply. The device also includes a programmable square-wave output that can be used for various purposes, including as a processor interrupt source or as a clock source for other digital circuits.

With an accuracy of ±2 minutes per month at 25°C, the DS1338U-3+T&R is precise enough for most time-sensitive applications. The clock/calendar functionality provides seconds, minutes, hours, day, date, month, and year information, and it accounts for leap years up to the year 2100. The integrated 56-byte, battery-backed NV SRAM allows for the storage of critical data that must be preserved during power loss.

For ease of integration, the DS1338U-3+T&R is offered in tape and reel (T&R) packaging, facilitating automated manufacturing processes. It is suitable for a wide array of applications, including embedded systems, utility meters, POS terminals, consumer electronics, and many others that require reliable timekeeping.

Overall, the DS1338U-3+T&R from Maxim Integrated is a compact, reliable, and versatile RTC solution that delivers the performance required for time-critical applications while maintaining a minimal footprint on the system board.