Maxim Integrated's DS1287 Real-Time Clock

The DS1287 Real-Time Clock (RTC) from Maxim Integrated is a self-contained timekeeping module that combines a real-time clock/calendar and 114 bytes of static RAM. It provides a full binary-coded decimal (BCD) clock/calendar that is accessible through a simple multiplexed byte-wide interface. The integrated circuit encapsulates a quartz crystal and a lithium battery, which ensures that timekeeping is maintained even when the main power to the device is interrupted.

This RTC module is designed to be a drop-in replacement for the industry-standard DS1287, and it offers a wide range of features that make it an essential component for applications requiring accurate timekeeping and data storage capabilities. The DS1287 is particularly well-suited for use in embedded systems, servers, industrial controllers, and other equipment where reliable time tracking is crucial.

Key Features of the DS1287:

• Integrated Power Supply: The DS1287 includes an embedded lithium battery that provides a long-term power supply, ensuring the clock continues to run and the RAM retains data for over 10 years in the absence of external power.
• Timekeeping Accuracy: The device maintains accurate timekeeping with a precision quartz crystal oscillator, which is factory-tuned for high stability.
• BCD Representation: The clock/calendar provides seconds, minutes, hours, day, date, month, and year information in a BCD format, which simplifies interfacing with microprocessors.
• Programmable Alarm: The DS1287 features a programmable alarm that can be set to trigger on a specific second, minute, hour, day, or date.
• Automatic Leap Year Compensation: The device automatically adjusts for months with fewer than 31 days, including corrections for leap year.
• Simple Interface: The multiplexed byte-wide interface allows for easy integration with most microprocessors without the need for additional components.
• Durable Construction: Encapsulated in a 24-pin DIP (Dual In-line Package) or EDIP (Extended Dual In-line Package), the DS1287 is designed for robust performance in a variety of environmental conditions.

The DS1287 is an ideal solution for designers looking for a reliable and easy-to-implement real-time clock module. With its comprehensive feature set and self-contained design, this RTC from Maxim Integrated is a dependable choice for maintaining accurate time and system data across a wide range of applications.