DS1307 RTC

The DS1307 is a low-power I2C real-time clock (RTC) module with 56 bytes of battery-backed SRAM. Tracks seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation valid to 2100. Includes LIR2032 backup battery. Pre-programmed with current time. Consumes less than 500nA in battery backup mode.

Features:

1. I2C interface (2-wire)
2. Timekeeping: HH:MM:SS AM/PM, Day, Date, Month, Year
3. 56 bytes non-volatile RAM for user data
4. Battery backup with LIR2032 (included)
5. 1Hz square wave output pin
6. Leap-year compensation to year 2100
7. UL recognised

Specifications:

• Interface: I2C
• Battery Backup: LIR2032 (included)
• Backup Current: <500nA
• SRAM: 56 bytes non-volatile
• SQW Output: 1Hz, 4kHz, 8kHz, 32kHz

Applications:

• Data loggers with timestamps
• Alarm clocks and schedulers
• Embedded system timekeeping