DS2502-E64

IEEE EUI-64节点地址芯片


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说明

The DS2502-E64 is a variant of the DS2502 1024-bit Add-Only Memory. It differs from the standard DS2502 in its custom ROM family code 89h, and the UniqueWare™ Identifier 5E7h in place of the upper 12 bits of the standard ROM serialization field. Otherwise, the electrical and logical behavior is identical to that of the DS2502. For technical details please refer to the DS2502 data sheet.

The first 32 bytes of the DS2502-E64's EPROM memory contain a globally unique 64-bit node address (EUI-64) and are write-protected. The data structure follows the conventions of UniqueWare devices using Default Data Structure (Figure 1 in the full data sheet). This format is also known as UDP (universal data packet) and is commonly used in 1-Wire® APIs. Therefore, if using one of those APIs one can call a high level function to read and verify the inverted CRC16. The UDP is defined in Application Note 114, 1-Wire File Structure, and the APIs can be found in the 1-Wire Software Development Kits.

The data record starts with a length byte (0Ch) and the 4-byte UniqueWare Project ID 00001128h. The next eight bytes contain the EUI-64 global identifier (node address) which consists of an incrementing 40-bit extension identifier and the IEEE®-assigned 24-bit company ID value 006035h. An inverted 16-bit CRC ends the data record. The remaining bytes of the 32-byte memory page remain unprogrammed. Neither the 40-bit extension identifier nor the 24-bit company ID are related to the 64-bit ROM registration number. The ROM registration number is used to provide a unique address to access the DS2502-E64 when multidropped on a 1-Wire bus.
DS2502-E64:引脚分配 DS2502-E64:引脚分配 放大+

关键特性

  • IEEE-approved factory programmed 64-bit node address chip (EUI-64) with 768 bits user-programmable OTP-EPROM communicates with the economy of one signal plus ground
  • Meets the node identification requirements of IEEE standard 1394-1995 (FireWire®)
  • Unique, factory-lasered 64-bit registration number assures absolute traceability because no two parts are alike
  • Built-in multidrop controller ensures compatibility with other 1-Wire products
  • Device is an add-only memory where additional data can be programmed into EPROM without disturbing existing data
  • Reduces control, address, data, power, and programming signals to a single pin
  • Directly connects to a single port pin of a microprocessor and communicates at up to 16.3kbps
  • Low cost TO-92 or TSOC surface mount packages
  • 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
Part NumberMemory TypeMemory SizeBus TypeVSUPPLY
(V)
VSUPPLY
(V)
Package/PinsBudgetary
Price
minmaxSee Notes
DS2502-E64 EPROM1K x 11-Wire2.86
TO92/3
TSOC/6
$1.40 @1k
查看所有Memory (EPROM, EEPROM, ROM, NV SRAM) (47)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

应用笔记 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
设计指南 5403 How to Build a 1-Wire® Evaluation Kit

质量和环境数据

申请可靠性报告: DS2502-E64 
无铅封装的锡(Sn)晶须报告

其它资源

传感器校准 (English only)

CAD Symbols and Footprints

  • DS2502-E64+
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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