DS1307

64 x 8, Serial, I

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GENERAL DESCRIPTION

The DS1307 serial real-time clock (RTC) 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 I

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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 12-hour format with AM/PM indicator.

The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the battery supply.

FEATURES

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, Nonvolatile (NV) RAM for Data Storage

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Programmable Square-Wave Output Signal

Automatic Power-Fail Detect and Switch Circuitry

Consumes Less than 500nA in Battery Backup Mode with Oscillator Running

Optional Industrial Temperature Range: -40

℃ to +85℃

Available in 8-Pin Plastic DIP or SO

Underwriters Laboratory (UL) Recognized

Typical operating circuit and Pin Configurations appear at end of data sheet.

ORDERING INFORMATION

PART

TEMP RANGE

VOLTAGE(V)

PIN-PACKAGE

TOP MARK*

DS1307

0

℃ to +70℃

5.0

8 PDIP (300 mils)

DS1307

DS1307+

0

℃ to +70℃

5.0

8 PDIP (300 mils)

DS1307

DS1307N

-40

℃ to +85℃

5.0

8 PDIP (300 mils)

DS1307

DS1307Z

0

℃ to +70℃

5.0

8 SO (150 mils)

DS1307

DS1307Z+

0

℃ to +70℃

5.0

8 SO (150 mils)

DS1307

DS1307ZN

-40

℃ to +85℃

5.0

8 SO (150 mils)

DS1307N

DS1307ZN+

-40

℃ to +85℃

5.0

8 SO (150 mils)

DS1307N

DS1307Z/T&R

0

℃ to +70℃

5.0

8 SO (150 mils) Tape and Reel

DS1307

DS1307Z+T&R

0

℃ to +70℃

5.0

8 SO (150 mils) Tape and Reel

DS1307

DS1307ZN/T&R

-40

℃ to +85℃

5.0

8 SO (150 mils) Tape and Reel

DS1307N

DS1307ZN+T&R

-40

℃ to +85℃

5.0

8 SO (150 mils) Tape and Reel

DS1307N

+Denotes a lead-free/RoHS-compliant device.

*A “+” anywhere on the top mark indicates a lead-free device. An “N” on the lower left corner of the top mark indicates an industrial

temperature grade device.

ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground…………………………………………………-0.5V to +7.0V

Operating Temperature Range (Noncondensing )

Commercial…………………………………………………………………………………………. ..0

℃ to +70℃

Industrial…………………………………………………………………………………………….. .-40

℃ to +85℃

Storage Temperature Range……………………………………………………………………………-55

℃ to +125℃

Soldering Temperature (DIP, leads)…………………………………………………………………..+260

℃ for 10 seconds

Soldering Temperature (surface mount)…………………………………………See JPC/JEDEC Standard J-STD-020A