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Dallas Semiconductor DS1990R-F5# Serial Number Ibutton
iButton-Serial-number-Dallas-Semiconductor-DS1990R-F5-This-serial-number-type-iButton-is-a-ruggedly-easy-to-use-device-that-serves-as-an-electronic-registration-number-for-automatic-identification-Data-is-transferred-via-the-1-Wire-protocol-requiring-only-a-single-signal-lead-plus-a-ground-return-BR-BR-Every-device-is-factory-lasered-with-a-guaranteeed-unique-64-bit-registration-number-allowing-for-complete-traceability-Suitable-applications-include-access-control-workflow-tracki
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