1-Wire iButton Dallas

iButton Fobs with DS1990A-F5 – Red
The iButton serial number (DS1990A) is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire protocol, which requires only a single data lead and a groun...
Dallas Key Fobs DS1990A-F5 – Blue
The iButton serial number (DS1990A) is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire? protocol, which requires only a single data lead and a grou...