Maxim Integrated DS1387 Real-Time Clock

The DS1387 from Maxim Integrated is a full-featured real-time clock (RTC) module that provides a comprehensive timekeeping solution for a wide range of applications. This RTC is uniquely designed to maintain accurate time and date information, including seconds, minutes, hours, day, date, month, and year. It also accounts for leap years up to the year 2100, ensuring long-term reliability and accuracy.

One of the standout features of the DS1387 is its integrated battery-backed SRAM. This nonvolatile memory retains data even when the main power supply is lost, making it an ideal choice for maintaining critical data during power outages or when devices are turned off. With a capacity of 4K x 8 bits, the SRAM offers ample storage for application-specific data or system configuration parameters.

The DS1387 is designed for versatility and ease of integration. It communicates with a microprocessor via a simple multiplexed byte-wide interface, which allows for straightforward connection to most microcontrollers or microprocessors. The device operates over a wide power supply range, typically from 4.5V to 5.5V, making it suitable for use in a variety of systems.

Additional features of the DS1387 include two time-of-day alarms and a programmable square-wave output. These functions provide added utility for scheduling tasks or triggering events based on the real-time clock. The square-wave output can be programmed for different frequencies, offering flexibility for various timing applications.

The robust design of the DS1387 ensures that it is able to operate under harsh conditions. It is specified for commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges, catering to the needs of diverse environments. The device is packaged in a 24-pin EDIP (Extended DIP) or LCC (Leadless Chip Carrier), providing options for different mounting preferences.

In summary, the DS1387 from Maxim Integrated stands out as a reliable and feature-rich real-time clock module, suitable for applications that require accurate timekeeping, data retention, and flexible interfacing options.