DS1307-TD

The DS1307 serial real-time clock is a low-power, full BCD clock/calendar with 56 bytes of nonvolatile SRAM. Address and data are transferred serially via a 2-wire bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. End-of-month dates are automatically adjusted for months with fewer than 31 days, including leap year correction. The clock can operate in either 24-hour or 12-hour format with an AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to battery backup.

Applications

• Consumer electronics
• Industrial systems
• Data logging equipment
• Telecommunications equipment
• Automotive electronics

Key features

• Real-time clock counts seconds, minutes, hours, date, month, day of week, and year with leap-year compensation valid through 2100
• 56-byte nonvolatile RAM for data storage
• 2-wire serial interface
• Programmable square-wave output signal
• Automatic power-fail detect and switch circuit
• Consumes less than 1μA in battery backup mode with oscillator running
• Optional industrial temperature range: -40℃ ~ +85℃
• UL recognized