Real-Time Clock With Serial I2C Interface

The 1339 serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I2C bus. The clock/date provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month 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 1339 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, maintaining time, date, and alarm operation.

Features

  • Real-Time Clock (RTC) counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100
  • Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC (surface-mount package with an integrated crystal)
  • Fast mode I2C Serial interface
  • Two time-of-day alarms
  • Programmable square-wave output
  • Oscillator stop flag
  • Automatic power-fail detect and switch circuitry
  • Trickle-charge capability
  • Industrial temperature range (-40 to +85°C)
  • Underwriters Laboratory (UL) recognized

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
1339-2DCGI Active DCG8 SOIC 8 I Yes Tube Availability
1339-2DCGI8 Active DCG8 SOIC 8 I Yes Reel Availability
1339-2DVGI Active DVG8 TSSOP 8 I Yes Tube Availability
1339-2DVGI8 Active DVG8 TSSOP 8 I Yes Reel Availability
1339-31DCGI Active DCG8 SOIC 8 I Yes Tube Availability
1339-31DCGI8 Active DCG8 SOIC 8 I Yes Reel Availability
1339-31DVGI Active DVG8 TSSOP 8 I Yes Tube Availability
1339-31DVGI8 Active DVG8 TSSOP 8 I Yes Reel Availability
1339AC-2SRGI Active PIG16 SOIC 16 I Yes Tube Availability
1339AC-2SRGI8 Active PIG16 SOIC 16 I Yes Reel Availability
1339AC-31SRGI Active PIG16 SOIC 16 I Yes Tube Availability
1339AC-31SRGI8 Active PIG16 SOIC 16 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
1339 Datasheet Datasheet PDF 342 KB Mar 11, 2015
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 12, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
PCNs & PDNs
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 13, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 14, 2016
PCN# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB Oct 14, 2014
PCN# : W1101-02R4 Fab 4 to TSMC Product Change Notice PDF 70 KB Jun 30, 2014
PCN# : W1101-02R3 Fab 4 to TSMC Product Change Notice PDF 71 KB Apr 7, 2014
PCN# : W1101-02R2 Fab 4 to TSMC Product Change Notice PDF 67 KB Jan 25, 2014
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 20, 2012
PCN# : A1208-06 Changed of Assembly Location and Crystal Product Change Notice PDF 1.06 MB Nov 17, 2012
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016