I²C/SMBus Silicon Serial Number

Unique 64-bit factory lasered in each part. Perfect low-cost solution for embedded applications requiring an electronic serial number.

Please check latest availability status for a specific part variant.


The DS28CM00 is a low-cost, electronic registration number to provide an absolutely unique identity that can be determined with the industry standard I²C and SMBus™ interface. The registration number is a factory-lasered, 64-bit ROM that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit family code (70h). In SMBus mode, the DS28CM00 resets its communication interface if it detects a bus fault condition.
DS28CM00: Typical Operating Circuit DS28CM00: Typical Operating Circuit Enlarge+

Key Features

  • Unique, Factory-Lasered and Tested 64-bit Registration Number (8-bit Family Code + 48-bit Serial Number + 8-bit CRC)
  • SMBus-Compatible I²C Serial Interface
  • Supports 100kHz and 400kHz Communication Speeds
  • 5V Tolerant Interface Pins
  • Operating Range: 1.8V ±10% to 5V ±5%, -40°C to +85°C
  • 5-Pin SOT23 Package


  • Accessory and Peripheral Identification
  • Equipment Registration and License Management
  • Network Node Identification
  • Printed Circuit Board Unique Serialization
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
minmaxSee Notes
DS28CM00 PCB ID and AuthenticationROM64bit x 1I2C1.625.25
$0.70 @1k
See All Memory (EPROM, EEPROM, ROM, NV SRAM) (52)
Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS28CM00EVKIT: Evaluation Board/Evaluation System for the DS28CM00

Quality and Environmental Data

Product Reliability Reports: DS28CM00.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • DS28CM00R-A00+T
  • DS28CM00R-A00+U
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


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