DS1340
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DS1340

I²C RTC with Trickle Charger

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I²C Real-Time Clock with Trickle Charger Offers Software Clock Calibration

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IBIS Model DS1340 IBIS Model Download 99.23KB
Part Models 14
1ku List Price Starting From $2.50
Features
  • Enhanced Second Source for the ST M41T00
  • Completely Manages All Timekeeping Functions
    • RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year
    • Software Clock Calibration
    • Oscillator Stop Flag
  • Low-Power Operation Extends Battery Backup Run Time
    • Low Timekeeping Voltage Down to 1.3V
    • Automatic Power-Fail Detect and Switch Circuitry
    • Trickle-Charge Capability
  • Three Operating Voltage Ranges (1.8V, 3V, and 3.3V) Supports Systems Using Legacy and Modern Power Buses
  • Surface-Mount Package with an Integrated Crystal (DS1340C) Saves Additional Space and Simplifies Design
  • Simple Serial Port Interfaces with Most Microcontrollers
    • Fast (400kHz) I2C Interface
  • 8-Pin µSOP or SO Package Minimizes Required Space
  • Underwriters Laboratories (UL®) Recognized
Additional Details
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The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional registers, which are accessed individually, are required for the trickle charger and flag. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the backup supply. The device is programmed serially through an I²C bidirectional bus.

Applications

  • Medical Equipment
  • Point-of-Sale Equipment
  • Portable Instrumentation
  • Telecommunications
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file View Data Sheet (Rev.9)
Documentation View All Documentation
IBIS Model DS1340 IBIS Model Download 99.23KB
Part Models 14
1ku List Price Starting From $2.50
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DS1340

Documentation

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Data Sheet

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UPDATED 04/27/2015
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DS1340-DS1340C: I²C RTC with Trickle Charger Data Sheet (Rev.9)

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UPDATED 01/01/1900
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3914: I²C RTC，带有涓流充电器 Data Sheet

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UPDATED 01/01/1900
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3914: I2C RTC、トリクルチャージャ内蔵 Data Sheet

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Reliability Data

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UPDATED 01/12/2023
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DS1340 Reliability Data redirect icon

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Technical Articles

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UPDATED 03/22/2013
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Adding Intelligence to LED Lighting redirect icon

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UPDATED 10/12/2013
Chinese
实现LED照明智能化 redirect icon

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UPDATED 06/07/2002
English
Using the Dallas Tricklecharge Timekeeper redirect icon

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UPDATED 03/29/2001
English
Interfacing the DS1307 with an 8051-Compatible Microcontroller redirect icon

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UPDATED 03/27/2002
English
Lithium Coin-Cell Batteries: Predicting an Application Lifetime redirect icon

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UPDATED 11/26/2012
Japanese
リチウムコインセルバッテリ：アプリケーション寿命の予測 redirect icon

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UPDATED 09/17/2012
English
State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks redirect icon

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UPDATED 03/28/2014
English
Tips for Writing Bulletproof Real-Time Clock Control Code redirect icon

Design Note

12

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UPDATED 02/15/2002
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Design Considerations for Analog Devices Real-Time Clocks redirect icon

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UPDATED 03/29/2001
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Crystal Considerations with Maxim Real-Time Clocks (RTCs) redirect icon

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UPDATED 01/26/2011
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Oscillator Design Considerations for Low-Current Applications redirect icon

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UPDATED 10/10/2011
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Demonstrating Green Technology with Apples, Oranges, Lemons, and Limes redirect icon

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UPDATED 02/15/2002
English
Using the DS32kHz with Maxim Real-Time Clocks redirect icon

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UPDATED 05/26/2006
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Selecting a Backup Source for Real-Time Clocks redirect icon

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UPDATED 05/24/2005
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Estimating Super Capacitor Backup Time on Trickle-Charger Real-Time Clocks redirect icon

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UPDATED 06/28/2005
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估算涓流充电实时时钟的超级电容备份时间 redirect icon

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UPDATED 09/16/2005
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トリクルチャージャのリアルタイムクロックのスーパーキャパシタのバックアップ時間を推定する方法 redirect icon

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UPDATED 08/10/2005
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FAQ About the Integrated-Crystal Package Option redirect icon

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UPDATED 10/26/2005
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有关内置晶体封装的常见问题 redirect icon

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UPDATED 12/28/2005
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水晶内蔵パッケージオプションに関するFAQ (よくある質問) redirect icon

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Documentation

Technical Documents 16
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Data Sheet 1

DS1340-DS1340C: I²C RTC with Trickle Charger Data Sheet (Rev.9)

Reliability Data 1

DS1340 Reliability Data

Design Note 8

Design Considerations for Analog Devices Real-Time Clocks
Crystal Considerations with Maxim Real-Time Clocks (RTCs)
Oscillator Design Considerations for Low-Current Applications
Demonstrating Green Technology with Apples, Oranges, Lemons, and Limes
Using the DS32kHz with Maxim Real-Time Clocks
Selecting a Backup Source for Real-Time Clocks
Estimating Super Capacitor Backup Time on Trickle-Charger Real-Time Clocks
FAQ About the Integrated-Crystal Package Option

Technical Articles 6

Adding Intelligence to LED Lighting
Using the Dallas Tricklecharge Timekeeper
Interfacing the DS1307 with an 8051-Compatible Microcontroller
Lithium Coin-Cell Batteries: Predicting an Application Lifetime
State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
Tips for Writing Bulletproof Real-Time Clock Control Code

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 Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
DS1340C-18# 16-SOIC_W-300_MIL external-link
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DS1340C-3# 16-SOIC_W-300_MIL external-link
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DS1340C-33# 16-SOIC_W-300_MIL external-link
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DS1340C-33#T&R 16-SOIC_W-300_MIL external-link
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DS1340U-18+ Micro-MAX, Thin Shrink Small-Outline external-link
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DS1340U-3+ Micro-MAX, Thin Shrink Small-Outline external-link
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DS1340U-3+T&R Micro-MAX, Thin Shrink Small-Outline external-link
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DS1340U-33+ Micro-MAX, Thin Shrink Small-Outline external-link
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DS1340U-33+T&R Micro-MAX, Thin Shrink Small-Outline external-link
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DS1340Z-18+ Small-Outline IC, Narrow (0.15in) external-link
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DS1340Z-3+ Small-Outline IC, Narrow (0.15in) external-link
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DS1340Z-3+T&R Small-Outline IC, Narrow (0.15in) external-link
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DS1340Z-33+ Small-Outline IC, Narrow (0.15in) external-link
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DS1340Z-33+T&R Small-Outline IC, Narrow (0.15in) external-link
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