The DS12C887A+ is a real-time clock (RTC) integrated circuit (IC) component produced by Maxim Integrated. It provides accurate timing and date information, making it suitable for various applications that require timekeeping capabilities. Here are some key features and an overview of the DS12C887A+:
1. Clock and Calendar Functionality: The DS12C887A+ includes a built-in 32.768 kHz quartz crystal oscillator, which ensures accurate timekeeping. It maintains seconds, minutes, hours, day, date, month, and year information.
2. Nonvolatile Timekeeping: This IC has battery backup support to preserve timekeeping information in the event of a power loss. It has a backup battery pin for connecting an external battery (typically a lithium coin cell) to retain time and date information.
3. Programmable Alarms: The DS12C887A+ offers two programmable time-of-day alarms. These alarms can be configured to generate interrupts or square wave output signals to trigger external devices or signals according to specific time settings.
4. Periodic Interrupt: It provides a programmable time-based interrupt that can be triggered at different intervals, ranging from 122 μs to 500 ms. This interrupt can be used to wake up a microcontroller or perform regular time-based tasks.
5. 24-Hour or 12-Hour Format: The IC supports both 24-hour and 12-hour time formats with an AM/PM indicator
