DS1307
64 x 8, Serial, I C Real-Time Clock
2 GENERAL DESCRIPTION BENEFITS AND FEATURES The DS1307 serial real-time clock (RTC) is a lowpower, full binary-coded decimal (BCD) clock/calendar
plus 56 bytes of NV SRAM. Address and data are
2
transferred serially through an I C, 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 clock operates in either the 24-hour or 12hour format with AM/PM indicator. 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
o Real-Time Clock Counts Seconds, Minutes,
Hours, Date of the Month, Month, Day of the
Week, and Year with Leap-Year
Compensation Valid Up to 2100
o 56-Byte, Battery-Backed, General-Purpose
RAM with Unlimited Writes
o Programmable Square-Wave Output Signal Simple Serial Port Interfaces to Most
Microcontrollers …
