Ds 1307 Datasheet

AVAILAB

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DS1307 64 x 8, Serial, I2C Real-Time Clock
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 isautomatically 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.

GENERAL DESCRIPTIONFEATURES
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Real-Time Clock (RTC) 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, Battery-Backed, General-Purpose RAM with Unlimited Writes 2 I C Serial Interface Programmable Square-Wave Output Signal Automatic Power-Fail Detect and Switch Circuitry Consumes Less than 500nA inBattery-Backup Mode with Oscillator Running Optional Industrial Temperature Range: -40°C to +85°C Available in 8-Pin Plastic DIP or SO Underwriters Laboratories (UL) Recognized

TYPICAL OPERATING CIRCUIT
VCC VCC CRYSTAL VCC

PIN CONFIGURATIONS
TOP VIEW

RPU

RPU

X1 X2 VBAT GND SO (150 mils)

VCC SQW/OUT SCL SDA

X1 X2 VBAT GND

VCC SQW/OUT SCL SDA

X1 X2 SCL CPU SDA

VCC SQW/OUT

PDIP(300 mils)

DS130
VBAT GND
RPU = tr/Cb

Functional Diagrams

ORDERING INFORMATION
PART DS1307+ DS1307N+ DS1307Z+ DS1307ZN+ DS1307Z+T&R DS1307ZN+T&R TEMP RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C VOLTAGE (V) 5.0 5.0 5.0 5.0 5.0 5.0 PIN-PACKAGE 8 PDIP (300 mils) 8 PDIP (300 mils) 8 SO (150 mils) 8 SO (150 mils) 8 SO (150 mils) Tape and Reel 8SO (150 mils) Tape and Reel TOP MARK* DS1307 DS1307N DS1307 DS1307N DS1307 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.

Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademarkof Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

REV: 100208

DS1307 64 x 8, Serial, I C Real-Time Clock

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Voltage Range on Any Pin Relative to Ground ................................................................................ -0.5V to +7.0VOperating Temperature Range (Noncondensing) Commercial .......................................................................................................................... 0°C to +70°C Industrial ............................................................................................................................ -40°C to +85°C Storage TemperatureRange......................................................................................................... -55°C to +125°C Soldering Temperature (DIP, leads) .................................................................................... +260°C for 10 seconds Soldering Temperature (surface mount)…..……………………….Refer to the JPC/JEDEC J-STD-020 Specification.
Stresses beyond those listed under “Absolute Maximum Ratings” may causepermanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS
(TA =...