DS1307Z+

DS1307Z+ is a serial real-time clock (RTC). It is a low power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I²C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply.

• Completely manages all timekeeping functions
• 56-byte, battery-backed, general-purpose RAM with unlimited writes
• Programmable square-wave output signal
• Simple serial port interfaces to most microcontrollers, I²C serial interface
• Low power operation extends battery backup run time
• Consumes less than 500nA in battery backup mode with oscillator running
• Automatic power-fail detect and switch circuitry
• Underwriters Laboratories® (UL) recognized
• 8 SO package
• Temperature rating range from 0°C to +70°C

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