The DS1685-3 is a full-featured, self-contained real-time clock/calendar (RTC) module from Maxim Integrated, specifically designed to provide an efficient timing solution for embedded systems. The DS1685-3 incorporates a wealth of features including a built-in microprocessor, a stable crystal oscillator, and a lithium battery that ensures timekeeping operations continue seamlessly even during power outages.

Key Features

• Integrated Battery Backup: With its onboard lithium battery, the DS1685-3 maintains accurate timekeeping when main power is lost, making it ideal for critical applications where time accuracy is paramount.
• Extended Temperature Range: The device is designed to operate reliably across a wide temperature range, making it suitable for demanding industrial environments.
• Multiple Timekeeping Formats: The DS1685-3 supports both binary and BCD (Binary-Coded Decimal) timekeeping formats, allowing for flexibility in various system designs.
• Alarm Function: It features a programmable alarm function that can be set to trigger on a specific date, day of the week, or time of day, providing additional utility for time-sensitive tasks.
• Leap Year Compensation: The module includes automatic leap year compensation up to the year 2100, ensuring ongoing accuracy without the need for manual adjustments.

Applications

The DS1685-3 is versatile and can be used in a variety of applications including:

• Embedded systems
• Industrial control systems
• Utility meters
• Telecommunication equipment
• POS terminals

Technical Specifications

With a supply voltage range of 2.7V to 5.5V and a typical power consumption of only 1.0μA at 3.3V, the DS1685-3 is an energy-efficient solution for real-time clock applications. The device is available in a JEDEC standard 24-pin, 600-mil DIP and is fully compatible with the IBM AT bus, which allows for easy integration into legacy systems as well as new designs.

For more detailed technical information, designers and engineers are encouraged to consult the DS1685-3 datasheet available on the Maxim Integrated website.