DS1307

64 x 8, Serial, I²C Real-Time Clock

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Status Explanations for product status codes

Part Number Status
DS1307 Active: In Production. See Ordering Information for details.

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 I²C, 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 backup supply. Timekeeping operation continues while the part operates from the backup supply.

Data Sheet

Download this datasheet in PDF formatDownload Rev 5 (PDF, 148kB)
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Key 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, General-Purpose RAM with Unlimited Writes
  • I²C Serial Interface
  • 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°C to +85°C
  • Available in 8-Pin Plastic DIP or SO
  • Underwriters Laboratories (UL) Recognized
   
   

Key Specifications:

Timekeeping & Real-Time Clocks
Part Number Interface VSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory Type Memory Size
(Bytes)
Time of Day Alarms Budgetary
Price
typ See Notes
DS1307  I2C 5 300 12.5 NV SRAM 56 0 $1.35 @1k
See All Timekeeping & Real-Time Clocks (90)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

DS1307: Typical Operating Circuit
Typical Operating Circuit

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Rev 5; 2008-10-16
This page last modified: 2011-02-15