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DS2502
1K位只添加存储器


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概述
The DS2502 1Kb Add-Only Memory identifies and stores relevant information about the product to which it is associated. This lot- or product-specific information can be accessed with minimal interface—for example, a single port pin of a microcontroller. The DS2502 consists of a factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (09h) plus 1Kb of EPROM which is user-programmable. The power to program and read the DS2502 is derived entirely from the 1-Wire® communication line.

Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. The entire device can be programmed and then write-protected if desired. Alternatively, the part may be programmed multiple times with new data being appended to, but not overwriting, existing data with each subsequent programming of the device. Note: Individual bits can be changed only from a logical 1 to a logical 0, never from a logical 0 to a logical 1. A provision is also included for indicating that a certain page or pages of data are no longer valid and have been replaced with new or updated data that is now residing at an alternate page address. This page address redirection allows software to patch data and enhance the flexibility of the device as a stand-alone database. The 48-bit serial number that is factory-lasered into each DS2502 provides a guaranteed unique identity which allows for absolute traceability. The familiar TO-92 or SOIC or TSOC packages provide a compact enclosure that allows standard assembly equipment to handle the device easily for attachment to printed circuit boards or wiring. Typical applications include storage of calibration constants, maintenance records, asset tracking, product revision status, and access codes.

注:使用该产品需要用到以下文件:

  • DS2502K评估板软件

    关键特性
    • 1024 bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground
    • Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are alike
    • Built-in multidrop controller ensures compatibility with other MicroLAN products
    • EPROM partitioned into four 256-bit pages for randomly accessing packetized data
    • Each memory page can be permanently write-protected to prevent tampering
    • Device is an "add only" memory where additional data can be programmed into EPROM without disturbing existing data
    • Architecture allows software to patch data by superseding an old page in favor of a newly programmed page
    • Reduces control, address, data, power, and programming signals to a single data pin
    • Directly connects to a single port pin of a microprocessor and communicates at up to 16.3 kbits per second
    • 8-bit family code specifies DS2502 communications requirements to reader
    • Presence detector acknowledges when the reader first applies voltage
    • Low cost TO-92 or 8-pin SO, SOT-23 (3-pin), TSOC and flip chip surface mount package
    • Reads over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C; programs at 11.5V to 12.0V from -40°C to +50°C

    Key Specifications:   Memory (EPROM, EEPROM, ROM, NV SRAM)
    Part Number Memory Type Memory Size Bus Type Real-Time Clock DIP with Internal Battery PowerCap Package Battery Monitor With GPIO Features Supply Voltage (min) (V) Supply Voltage (max) (V) Price**
    DS2502  EPROM 1K x 1 1-Wire No No No No No
    Add-Only Memory
    2.8 6 $0.95 @ 1k
    See All Memory (EPROM, EEPROM, ROM, NV SRAM) (54)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

    应用笔记
  • 应用笔记27:理解和运用Maxim iButton产品中的循环冗余校验(CRC) - DS2502
  • App Note 74: Reading and Writing 1-Wire® Devices Through Serial Interfaces - DS2502 (English only)
  • 应用笔记126:用软件实现1-Wire®通信 - DS2502
  • 应用笔记148:1-Wire网络可靠设计指南 - DS2502
  • 应用笔记155:1-Wire®软件资源指南和器件说明 - DS2502
  • 应用笔记178:利用1-Wire®产品标识印刷电路板 - DS2502
  • 应用笔记186:利用1-Wire®器件建立全球标识符 - DS2502
  • 应用笔记187:1-Wire搜索算法 - DS2502, DS2502
  • 应用笔记192:DS2480B串行接口1-Wire线驱动器的使用 - DS2502
  • App Note 195: TINIm390 Verification Module Chipset Reference Design - DS2502 (English only)
  • 应用笔记244:性能优异的1-Wire网络驱动器 - DS2502
  • 应用笔记710:利用DS80C400微控制器构建拨号网络 - DS2502
  • App Note 1097: White Paper 2: Using the 1-Wire® Public Domain Kit - DS2502 (English only)
  • App Note 1100: White Paper 5: Using 1-Wire APIs for Data Sheet Commands - DS2502 (English only)
  • 应用笔记3170:中庸之道:高速8位微控制器的用武之地 - DS2502
  • 应用笔记3377:Maxim晶片级封装安装指南 - DS2502
  • 应用笔记3438:串行数字网络 - DS2502
  • 应用笔记3505:采用无铅(Pb)装配流程装配高含铅的DS2502倒装芯片 - DS2502
  • 应用笔记3989:通过单个触点增加控制、存储器、安全和混合信号功能 - DS2502
  • 应用笔记4002:理解倒装芯片和晶片级封装技术及其应用 - DS2502

    评估板
  • DS9090K
  • DS2502K

    设计指南
  • 1-Wire®产品 (PDF)

    可靠性报告
  • 可靠性报告: DS2502.pdf (English only)

    软件/模型
  • DS2502K评估板软件

    定购信息
    注:

    1. 购买产品,请访问:http://www.maxim-ic.com.cn/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: 1-14 of 14

    DS2502 免费样品 采购
    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
    DS2502X1#U  
    CSP;2引脚;2mm²
    封装图: 21-0379 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:BF211-2*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS2502X1    
    CSP;2引脚;2mm²
    封装图: 21-0379 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:BF211-2*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS2502G+T&R    
    SFN;2引脚;36mm²
    封装图: 21-0390 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:G266+1*
    -40°C至+85°C 参考数据资料
    材料分析
    DS2502G+U  
    SFN;2引脚;36mm²
    封装图: 21-0390 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:G266+1*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS2502S     N/A SOIC(N);8引脚;31mm²
    封装图: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    使用封装码/变更:S8-2*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS2502S+  
    SOIC(N);8引脚;31mm²
    封装图: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    使用封装码/变更:S8+2*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS2502S+T&R    
    SOIC(N);8引脚;31mm²
    封装图: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    使用封装码/变更:S8+2*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS2502R+T&R    
    SOT;3引脚;8mm²
    封装图: 21-0051 (PDF)
    Land Pattern: 90-0179 (PDF)
    使用封装码/变更:U3+5*
    -40°C至+85°C 参考数据资料
    材料分析
    DS2502     N/A TO92;3引脚;20mm²
    封装图: 21-0248 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:Q3-1*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS2502+  
    TO92;3引脚;20mm²
    封装图: 21-0248 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:Q3+1*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS2502+T&R    
    TO92;3引脚;28mm²
    封装图: 21-0250 (PDF)
    Land Pattern: Not Applicable
    使用封装码/变更:Q3+4*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS2502P     N/A TSOC;6引脚;18mm²
    封装图: 21-0382 (PDF)
    Land Pattern: Not Available
    使用封装码/变更:D6-1*
    -40°C至+85°C RoHS/无铅:
    材料分析
    DS2502P+  
    TSOC;6引脚;18mm²
    封装图: 21-0382 (PDF)
    Land Pattern: Not Available
    使用封装码/变更:D6+1*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析
    DS2502P+T&R    
    TSOC;6引脚;18mm²
    封装图: 21-0382 (PDF)
    Land Pattern: Not Available
    使用封装码/变更:D6+1*
    -40°C至+85°C RoHS/无铅:无铅
    材料分析

    更多信息
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    2007-07-12
    本页最后一次更新: 2009-06-12


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