DS1687-3 Real-Time Clock from Maxim Integrated

The DS1687-3 is a high-performance, full-function real-time clock (RTC) from Maxim Integrated that is designed to provide precise time and date information for a wide range of applications. This versatile integrated circuit features a built-in microprocessor-compatible interface that ensures easy integration with most systems.

One of the key features of the DS1687-3 is its Y2K-compliant date management, which includes automatic leap year correction up to the year 2100. This makes the device particularly suited for long-term applications that require reliable timekeeping without manual adjustments or software patches for date rollovers.

The DS1687-3 operates in either 24-hour or 12-hour format with an AM/PM indicator, catering to different user preferences and international standards. It also includes a programmable alarm function that can be set to trigger on a specific date, day of the week, or time, providing a versatile reminder or wakeup feature for embedded systems.

Additional features include a 114-byte, battery-backed, nonvolatile (NV) RAM for data storage, which retains data even when the main power supply is turned off. This ensures critical data preservation during power outages or system shutdowns. The device is powered by an integrated lithium energy cell that provides a long operational life and maintains data and timekeeping for at least 10 years in the absence of external power.

The DS1687-3 also incorporates a programmable square-wave output and a watchdog timer that can be used for system health monitoring or as a system reset timer. These features provide additional functionality for system management and reliability.

Encased in a 24-pin EDIP (Extended Dual In-line Package) or a 28-pin SOIC (Small Outline Integrated Circuit) package, the DS1687-3 offers flexibility for various PCB (Printed Circuit Board) layouts and is ideal for embedded systems, telecommunications, networking equipment, and other time-sensitive applications.

Overall, the DS1687-3 from Maxim Integrated is a robust and reliable RTC solution that delivers precision and stability for systems requiring accurate timekeeping and data storage capabilities.