Maxim Integrated DS1339U-2+ Real-Time Clock

The Maxim Integrated DS1339U-2+ is a compact, highly integrated real-time clock (RTC) that provides a full binary-coded decimal (BCD) clock/calendar with 56 bytes of NV SRAM. This precision timekeeping device is designed to maintain accurate time and date information, ranging from seconds to years, and is ideal for a wide array of applications including embedded systems, servers, industrial equipment, and consumer electronics.

Featuring an I2C serial interface for easy integration into most microcontroller-based systems, the DS1339U-2+ offers a simple and efficient method for timekeeping and data storage. The device includes a built-in crystal oscillator with an external crystal, which ensures minimal drift over temperature and time. Additionally, it supports 24-hour or 12-hour formats with an AM/PM indicator, catering to various user preferences and international standards.

The DS1339U-2+ is equipped with two programmable time-of-day alarms and a programmable square-wave output, making it a versatile choice for systems that require scheduled wake-up or periodic interrupts. The alarms can be set to trigger on seconds, minutes, hours, day, date, month, or a combination of these, providing a high level of customization for specific application needs.

One of the key features of the DS1339U-2+ is its low power consumption, which is critical for battery-backed applications. The device operates in a wide voltage range from 2.3V to 5.5V, allowing it to be used in systems with varying power supply requirements. Its automatic power-fail detect and switch circuitry ensure that timekeeping continues uninterrupted during power outages, by automatically switching to the battery supply.

The DS1339U-2+ is housed in a compact 8-pin µSOP package, making it suitable for space-constrained applications. It is also fully operational in a temperature range from -40°C to +85°C, ensuring reliable performance across diverse operating conditions.

For engineers and designers looking for a dependable and feature-rich RTC solution, the Maxim Integrated DS1339U-2+ offers a combination of accuracy, flexibility, and power efficiency that is hard to match.