DS12C887 Real Time Clock RTC IC

DS12C887 Real Time Clock RTC IC

The DS12C887 is a fully integrated real-time clock (RTC) module that provides time-of-day clock, calendar, and alarm functions with non-volatile battery-backed operation. It is a drop-in replacement for the popular DS12887, commonly used in PC motherboards and industrial embedded systems.

This device integrates the RTC controller, quartz crystal, lithium battery, and CMOS RAM into a single 24-pin module, eliminating the need for external components. It maintains accurate timekeeping of seconds, minutes, hours, day, date, month, and year, including automatic leap-year compensation. Even when system power is off, the internal battery keeps the clock and memory running for many years.

Click here to view related products

Applications

• PC motherboards and BIOS clock modules
• Industrial controllers and embedded systems
• Data logging and time-stamping equipment
• Networking and telecom equipment
• Test and measurement instruments
• Legacy systems requiring DS12887-compatible RTC

Features

• Type: Real-Time Clock (RTC) with integrated battery and crystal
• Drop-in replacement for DS12887 / DS12C887 family
• Integrated lithium battery, quartz crystal, and RTC controller
• Timekeeping: Seconds, minutes, hours, day, date, month, year
• Automatic leap-year compensation
• 114 bytes of battery-backed CMOS RAM
• Alarm and periodic interrupt functions
• Square-wave output available
• Parallel bus interface
• Long battery life (typically 10+ years)
• No external crystal or battery required
• Package: 24-pin DIP module
• High reliability and easy to use

DS12C887-IC Datasheet