Amphenol DS1971

the ds1971 256-bit eeprom ibutton is a rugged read/write data carrier that identifies and stores relevant information about the product or person to which it is attached. this information can be accessed with minimal hardware: for example, a single port pin of a microcontroller. the ds1971 consists of a factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit crc, and an 8-bit family code (14h) plus 256 bits of eeprom. the power to program and read the ds1971 is derived entirely from the 1-wire communication line. data is transferred serially via the 1-wire protocol which requires only a single data lead and a ground return. the 48-bit serial number that is factory-lasered into each ds1971 provides a guaranteed unique identity which allows for absolute traceability. the durable microcan package is highly resistant to harsh environments such as dirt, moisture, and shock. its compact button-shaped profile is self-aligning with cup-shaped receptacles, allowing the ds1971 to be used easily by human operators or automatic equipment. accessories permit the ds1971 to be mounted on printed circuit boards, plastic key fobs, photo-id badges, id bracelets, and many other objects. applications include work-in-progress tracking, electronic travelers, access control and storage of calibration constants.