What the DS2502-E48 does on the BOM
The DS2502-E48 is an IEEE EUI-64 node address chip from Analog Devices — it stores a globally unique 64-bit identifier that a host reads over the 1-Wire interface. For a design that needs a hard-coded MAC or EUI-64 without a separate EEPROM and programming step, this part delivers the address pre-lasered at the factory.
