UniqueWare™ iButton® devices (DS1982U/DS1985U) are factory-programmed versions of the iButton Add-Only devices, DS1982 (1024 bit) and the DS1985 (16Kb) respectively. They differ from the regular devices in their custom ROM family codes (see Ordering Information) and the UniqueWare Identifier 5E7h in place of the upper 12 bits of the standard serialization field. For technical details on the devices, refer to the DS1982 and DS1985 data sheets.

UniqueWare Add-Only iButton devices are only available preprogrammed with customer-specific and write-protected data. UniqueWare data fills at least one but no more than the first two pages of a device, depending on the length of the customer-supplied data.

UniqueWare devices are only available to existing customers. New data patterns are no longer accepted. The minimum order quantity (MOQ) is 34,000 pieces with higher quantities available in multiples of 17,000 pieces. UniqueWare iButton devices can only be purchased in bulk form, delivered in bags. The shipment quantity can be plus or minus 10% of the order quantity. Only the quantity shipped will be billed.