Datasheet DS1307 (Maxim)

DS1307 64 x 8, Serial, I2C Real-Time Clock GENERAL DESCRIPTION BENEFITS AND FEATURES
The DS1307 serial real-time clock (RTC) is a low-  Completely Manages All Timekeeping Functions power, full binary-coded decimal (BCD) clock/calendar o Real-Time Clock Counts Seconds, Minutes, plus 56 bytes of NV SRAM. Address and data are Hours, Date of the Month, Month, Day of the transferred serially through an I2C, bidirectional bus. Week, and Year with Leap-Year The clock/calendar provides seconds, minutes, hours, Compensation Valid Up to 2100 day, date, month, and year information. The end of o 56-Byte, Battery-Backed, General-Purpose the month date is automatically adjusted for months RAM with Unlimited Writes with fewer than 31 days, including corrections for leap o Programmable Square-Wave Output Signal year. The clock operates in either the 24-hour or 12-  Simple Serial Port Interfaces to Most hour format with AM/PM indicator. The DS1307 has a Microcontrollers built-in power-sense circuit that detects power failures o I2C Serial Interface and automatically switches to the backup supply. Timekeeping operation continues while the part  Low Power Operation Extends Battery Backup operates from the backup supply. Run Time o Consumes Less than 500nA in Battery-
TYPICAL OPERATING CIRCUIT
Backup Mode with Oscillator Running o V Automatic Power-Fail Detect and Switch CC V CC Circuitry CRYSTAL  8-Pin DIP and 8-Pin SO Minimizes Required V R CC PU R PU Space X1 X2 V  Optional Industrial Temperature Range: -40°C to CC SCL SQW/OUT +85°C Supports Operation in a Wide Range of Applications CPU
DS1307
 Underwriters Laboratories® (UL) Recognized SDA V BAT GND
PIN CONFIGURATIONS
R PU = t r/C b TOP VLEW X1 VCC X1 VCC X2 SQW/OUT X2 SQW/OUT VBAT SCL VBAT SCL GND SDA GND SDA SO (150 mils) PDIP (300 mils)
ORDERING INFORMATION PART TEMP RANGE VOLTAGE (V) PIN-PACKAGE TOP MARK*
DS1307+ 0°C to +70°C 5.0 8 PDIP (300 mils) DS1307 DS1307N+ -40°C to +85°C 5.0 8 PDIP (300 mils) DS1307N DS1307Z+ 0°C to +70°C 5.0 8 SO (150 mils) DS1307 DS1307ZN+ -40°C to +85°C 5.0 8 SO (150 mils) DS1307N DS1307Z+T&R 0°C to +70°C 5.0 8 SO (150 mils) Tape and Reel DS1307 DS1307ZN+T&R -40°C to +85°C 5.0 8 SO (150 mils) Tape and Reel DS1307N +Denotes a lead-free/RoHS-compliant package. *A “+” anywhere on the top mark indicates a lead-free package. An “N” anywhere on the top mark indicates an industrial temperature range device. Underwriters Laboratories, Inc. is a registered certification mark of Underwriters Laboratories, Inc. 1 of 14 REV: 3/15 Document Outline TYPICAL OPERATING CIRCUIT PIN CONFIGURATIONS ORDERING INFORMATION ABSOLUTE MAXIMUM RATINGS RECOMMENDED DC OPERATING CONDITIONS (TA = 0 C to +70 C, TA = -40 C to +85 C.) (Notes 1, 2) DC ELECTRICAL CHARACTERISTICS (VCC = 4.5V to 5.5V; TA = 0 C to +70 C, TA = -40 C to +85 C.) (Notes 1, 2) DC ELECTRICAL CHARACTERISTICS (VCC = 0V, VBAT = 3.0V; TA = 0 C to +70 C, TA = -40 C to +85 C.) (Notes 1, 2) AC ELECTRICAL CHARACTERISTICS (VCC = 4.5V to 5.5V; TA = 0 C to +70 C, TA = -40 C to +85 C.) CAPACITANCE (TA = +25 C) 64 x 8, Serial, I2C Real-Time Clock SYMBOL TIMING DIAGRAM CLOCK ACCURACY RTC AND RAM ADDRESS MAP CLOCK AND CALENDAR CONTROL REGISTER I2C DATA BUS RS1