DS1973,pdf datasheet (4Kb EEPR

The DS1973 4Kb EEP ROMiButton is a rugged re ad/wri tedata carrier that iden tifies and st ores relevant information about the product or pe rson to wh ich it is att ached. This information canbe accessed with minimal hardware, for example a single port pin of a micro-controller. The DS1973 consists of a factorylasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (23H) plus 4096 bits of EEPROM. The power to prog ramand read the DS1973 is derived entirely from the 1-Wire communication line. The memory is organized as sixteen pages of 256 bits each.
The 64-bit registration number provides a guaranteed unique identity which allows for absolute traceability. Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. 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 DS1973 to be used easily by human operators or automatic equipment. Accessories permit the DS1973 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.