TM/DS1990A Serial Number iButton

The TM1990A serial number iButton 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 ground return. Accessories enable the TM1990A iButton to be mounted on almost any object, including containers, pallets, and bags.Specifications:Model: TM/DS1990ASize: 17.35mm (diameter) 6.00mm (height)64-bit registration number (8-bit family code + 48- bit serial number + 8-bit CRC tester)Read/write time :< 5msDigital identification by momentary contactChip-based data carrier compactly stores informationData can be accessed while affixed to an objectEconomically communicates to bus master with a single digital signal at 16.3k bits per second.Button shape is self-aligning with cup-shaped probesDurable stainless steel case engraved with registration number withstands harsh environments.Applications: Access control, work-in-progress tracking, tool management, inventory control, etc.Included: 1 x iButton with plastic tag (blue, green, yellow, BLACK -- COLOR MAY VARY )DocumentsThe iProbe iButton Reader can be found here.Arduino example code