iButton Key Fob

iButton Keyfobs with DS1990A-F5 – Black
Unique, factory-lasered and tested 64-bit Digital identification by momentary contact. Chip-based data carrier compactly stores information. Data can be accessed while affixed to an object. Economically communicates to bus master with a ...
iButton Key Fob | DS1990A-F5 with Plastic Holder
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...