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DS1689, DS1693
3V/5V、串行实时时钟,带有非易失RAM控制器


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状态
型号 状态 替代产品 说明
DS1689 状况:生产中,但该系列产品中的某些型号已经停产。请查看订购信息 DS1685 没有直接替代产品。
DS1693 该产品已停产,推荐替代产品请查看订购信息 DS1687 没有直接替代产品。

数据资料
完整的数据资料 (PDF, 600kB)
英文 下载数据资料(PDF)下载

概述
The DS1689/DS1693 is a real time clock (RTC) designed as a successor to the industry standard DS1285, DS1385, DS1485, and DS1585 PC real time clocks. This device provides the industry standard DS1285 clock function with the new feature of either +3.0 or +5.0V operation and automatic backup and write protection to an external SRAM. The DS1689 also incorporates a number of enhanced features including a silicon serial number, power-on/off control circuitry, and 114 bytes of user NVSRAM, power-on elapsed timer, and power cycle counter.

Each DS1689/DS1693 is individually manufactured with a unique 64-bit serial number as well as an additional 64-bit customer specific ROM or serial number. The serial number is programmed and tested at Dallas to insure that no two devices are a like. The serial number can be used to electronically identify a system for purposes such as establishment of a network node address or for maintenance tracking. Blocks of available numbers from Dallas Semiconductor can be reserved by the customer.

The serialized RTCs also incorporate power control circuitry, which allows the system to be powered on via an external stimulus, such as a keyboard or by a time and date (wake-up) alarm. The PWR output pin can be triggered by one or either of these events, and can be used to turn on an external power supply. The PWR pin is under software control, so that when a task is complete, the system power can then be shut down.

The DS1689/DS1693 incorporates a power-on elapsed time counter, a power-on cycle counter, and a battery powered continuous counter. These three counters provide valuable information for maintenance and warranty requirements.

Automatic backup and write protection for an external SRAM is provided through the VCCO and CEO pins. The lithium energy source used to permanently power the real time clock is also used to retain RAM data in the absence of VCC power through the VCCO pin. The chip enable output to RAM (CEO) is controlled during power transients to prevent data corruption.

The DS1689 is a clock/calendar chip with the features described above. An external crystal and battery are the only components required to maintain time-of-day and memory status in the absence of power. The DS1693 incorporates the DS1689 chip, a 32.768 kHz crystal, and a lithium battery in a complete, self-contained timekeeping module. The entire unit is fully tested at Dallas Semiconductor such that a minimum of 10 years of timekeeping and data retention in the absence of VCC is guaranteed.

本产品包含金属锂电池。 参见含电池设备的运输要求使用标准。

关键特性
Incorporates industry standard DS1287 PC clock plus enhanced features:
  • +3- or +5V operation
  • 64-bit silicon serial number
  • 64-bit customer specific ROM or additional serial number available
  • Power control circuitry supports system power-on from date/time alarm or key closure
  • Automatic battery backup and write protection to external SRAM
  • Crystal select bit allows RTC to operate with 6pF or 12.5pF crystal
  • 114 bytes user NV RAM
  • Auxiliary battery input
  • RAM clear input
  • Century register
  • 32kHz output for power management
  • 32-bit VCC powered elapsed time counter
  • 32-bit VBAT powered elapsed time counter
  • 16-bit power cycle counter
  • Compatible with existing BIOS for original DS1287 functions
  • Available as IC (DS1689) or standalone module with embedded battery and crystal (DS1693)
  • IC is available in industrial temperature version
  • Timekeeping algorithm includes leap year compensation valid up to 2100
  • 通过美国保险商实验室协会(UL®)认证

图表
DS1689、DS1693:原理框图
原理框图

应用笔记
  • App Note 58: Crystal Considerations with Dallas Real-Time Clocks (RTCs) - DS1689 (English only)
  • App Note 499: Using the Multiplex Bus RTC Extended Features - DS1689, DS1693 (English only)
  • App Note 504: Design Considerations for Dallas Semiconductor Real-Time Clocks - DS1689, DS1693 (English only)
  • App Note 505: Lithium Coin-Cell Batteries: Predicting an Application Lifetime - DS1689 (English only)
  • App Note 701: Using the DS32kHz with Dallas Real-Time Clocks - DS1689 (English only)
  • App Note 1145: Interface a Multiplexed-Bus Real-Time Clock to a µP With Separate Address and Data Buses - DS1689, DS1693 (English only)
  • App Note 3778: Problems and Solutions for Adjusting to Changes in Daylight Saving Time - DS1689, DS1693 (English only)

    设计指南
  • 实时时钟 (PDF)

    可靠性报告
  • 可靠性报告: DS1689.pdf DS1693.pdf (English only)
  • 通过美国保险商实验室协会(UL®)认证

    软件/模型

    定购信息
    注:

    1. 购买产品,请访问:http://china.maxim-ic.com/sales
    2. 没有找到您所需要的器件?请咨询我们的应用工程师。我们的专家会帮助您找到合适的器件,通常在一个工作日内回复。
    3. 型号尾缀:T或T&R = 卷带; + = RoHS/无铅; # = RoHS/无铅豁免权。详细信息请参考:完整的数据资料型号命名规则
    4. * “封装代码/变更”提供产品使用的变更信息。注意:型号尾缀中的“+”、“#”和“-”表示器件的RoHS状况,封装图上可能显示不同的尾缀字符。


    器件: 1-16/16

    DS1689 免费样品 采购 状态 推荐替代产品
    封装: 类型 引脚 占位面积
      封装图编码/变更 *
    温度 RoHS/无铅?
    材料分析
    DS1689   114 x 8 RAM   N/A No Longer Available DS1685
    没有直接替代产品。
    PDIP(W);28引脚;593mm²
    封装图: 21-0044 (PDF)
    连接盘图形: Not Applicable
    使用封装码/变更:P28-3*
    0°C至+70°C RoHS/无铅:
    材料分析
    DS1689S/T&R/     N/A No Longer Available DS1685S-5+


    连接盘图形: 不提供

    0°C至+70°C 参考数据资料
    DS1689S+T&R-W    
    Active
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    0°C至+70°C RoHS/无铅:无铅
    材料分析
    DS1689S+W    
    Active
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    0°C至+70°C RoHS/无铅:无铅
    材料分析
    DS1689SN+T&R-W    
    Active
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS1689SN+W    
    Active
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS1689SN     N/A No Longer Available DS1685SN-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28-2*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS1689SN/T&R     N/A No Longer Available DS1685SN-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28-2*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS1689S   114 x 8 RAM   N/A No Longer Available DS1685S-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28-2*
    0°C至+70°C RoHS/无铅:
    材料分析
    DS1689S/T&R     N/A No Longer Available DS1685S-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28-2*
    0°C至+70°C RoHS/无铅:
    材料分析
    DS1689S+     N/A No Longer Available DS1685S-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    0°C至+70°C RoHS/无铅:无铅
    材料分析
    DS1689S+T&R     N/A No Longer Available DS1685S-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    0°C至+70°C RoHS/无铅:无铅
    材料分析
    DS1689SN+     N/A No Longer Available DS1685SN-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS1689SN+T&R     N/A No Longer Available DS1685SN-5+
    SOIC(W);28引脚;235mm²
    封装图: 21-0251 (PDF)
    连接盘图形: 90-0255 (PDF)
    使用封装码/变更:F28+2*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS1693 免费样品 采购 状态 推荐替代产品
    封装: 类型 引脚 占位面积
      封装图编码/变更 *
    温度 RoHS/无铅?
    材料分析
    DS1693   114 x 8 RAM   N/A No Longer Available DS1687
    没有直接替代产品。
    EDIP;28引脚;626mm²
    封装图: 21-0241 (PDF)
    连接盘图形: 不提供
    使用封装码/变更:MDP28-2*
    0°C至+70°C RoHS/无铅:
    材料分析
    DS1693+     N/A No Longer Available DS1687-5+
    EDIP;28引脚;626mm²
    封装图: 21-0241 (PDF)
    连接盘图形: 不提供
    使用封装码/变更:MDP28+2*
    0°C至+70°C RoHS/无铅:无铅
    材料分析

    更多信息
  • RTC计算器

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    2005-11-28
    本页最后一次更新: 2009-10-23


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