DS1339
I²C Serial Real-Time Clock
RTC Provides System Flexibility with Multiple Programmable Features
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Overview
Features and Benefits
- Completely Manages All Timekeeping Functions
- Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
- Two Time-of-Day Alarms
- Programmable Square-Wave Output
- Oscillator Stop Flag
- Interfaces to Most Microcontrollers
- I2C Serial Interface
- Low-Power Operation Extends Battery Backup Run Time
- Automatic Power-Fail Detect and Switch Circuitry
- Trickle-Charge Capability
- Underwriters Laboratories® (UL) Recognized
- Surface-Mount Package with an Integrated Crystal (DS1339C Saves Additional Space and Simplifies Design
Product Details
The DS1339 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 DS1339 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, maintaining time, date, and alarm operation.
Applications
- Consumer Electronics (Set-Top Box, Digital Recording, Network Appliance)
- Handhelds (GPS, POS Terminal)
- Medical (Glucometer, Medicine Dispenser)
- Office Equipment (Fax/Printer, Copier)
- Other (Utility Meter, Vending Machine, Thermostat, Modem)
- Telecommunications (Router, Switcher, Server)
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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DS1339 Reliability Data1/12/2023
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Oscillator Design Considerations for Low-Current Applications1/26/2011
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Selecting a Backup Source for Real-Time Clocks5/26/2006
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FAQ About the Integrated-Crystal Package Option8/10/2005
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Estimating Super Capacitor Backup Time on Trickle-Charger Real-Time Clocks5/24/2005
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Design Considerations for Analog Devices Real-Time Clocks2/15/2002
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Using the DS32kHz with Maxim Real-Time Clocks2/15/2002
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Crystal Considerations with Maxim Real-Time Clocks (RTCs)3/29/2001
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Tips for Writing Bulletproof Real-Time Clock Control Code3/28/2014
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State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks9/17/2012
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Using the Dallas Tricklecharge Timekeeper6/7/2002
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Lithium Coin-Cell Batteries: Predicting an Application Lifetime3/27/2002
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Interfacing the DS1307 with an 8051-Compatible Microcontroller3/29/2001
Product Recommendations
DS1339 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| DS1339C-2# | Material Declaration | Reliability Data | 16-SOIC_W-300_MIL | |
| DS1339C-3# | Material Declaration | Reliability Data | 16-SOIC_W-300_MIL | |
| DS1339C-33# | Material Declaration | Reliability Data | 16-SOIC_W-300_MIL | |
| DS1339C-33#T&R | Material Declaration | Reliability Data | 16-SOIC_W-300_MIL | |
| DS1339U-2+ | Material Declaration | Reliability Data | Micro-MAX, Thin Shrink Small-Outline | |
| DS1339U-2+T&R | Material Declaration | Reliability Data | Micro-MAX, Thin Shrink Small-Outline | |
| DS1339U-3+ | Material Declaration | Reliability Data | Micro-MAX, Thin Shrink Small-Outline | |
| DS1339U-3+T&R | Material Declaration | Reliability Data | Micro-MAX, Thin Shrink Small-Outline | |
| DS1339U-33+ | Material Declaration | Reliability Data | Micro-MAX, Thin Shrink Small-Outline | |
| DS1339U-33+T&R | Material Declaration | Reliability Data | Micro-MAX, Thin Shrink Small-Outline | |
| Wafer Fabrication Data | DS1339 Reliability Data |
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DS1339 Discussions
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