DS1307

TIGER ELECTRONIC CO.,LTD DS1307 64 X 8 Serial Real Time Clock FEATURES 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 56 byte nonvolatile RAM for data storage 2-wire serial interface Programmable squarewave output signal Automatic power-fail detect and switch circuitry Consumes less than 500 nA in battery backup mode with oscillator running Optional industrial temperature range -40°C to +85°C Available in 8-pin DIP or SOIC Recognized by Underwriters Laboratory PIN ASSIGNMENT X1 X2 VBAT GND l 2 3 4 8 7 6 5 VCC SQW/OUT SCL SDA DS1307 8-Pin DIP (300 mil) X1 X2 VBAT GND l 2 3 4 8 7 6 5 VCC SQW/OUT SCL SDA DS1307Z 8-Pin SOIC (150 mil) PIN DESCRIPTION VCC X1, X2 VBAT GND SDA SCL SQW/OUT - Primary Power Supply - 32.768 kHz Crystal Connection - +3V Battery Input - Ground - Serial Data - Serial Clock - Square wave/Output Driver ORDERING INFORMATION DS1307 DS1307Z DS1307N DS1307ZN 8-Pin DIP 8-Pin SOIC (150 mil) 8-Pin DIP (Industrial) 8-Pin SOIC (Industrial) DESCRIPTION The DS1307 Serial Real Time Clock is a low power, full BCD clock/calendar plus 56 bytes of nonvolatile SRAM. Address and data are transferred serially via a 2-wire bi-directional 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 less than 31 days, including corrections for leap year. The clock operates in...