Memory & Data

UID (Unique Identifier)

A factory-programmed read-only serial number that uniquely identifies each NFC chip. UIDs are 4 bytes (single-size) or 7 bytes (double-size) for ISO 14443, or 8 bytes for ISO 15693. Used for anti-collision and simple identification.

별칭: UID unique identifier serial number

Related Terms

Anti-Collision UID Mirroring

Related Guides

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자주 묻는 질문

The NFC glossary is a comprehensive reference of technical terms, acronyms, and concepts used in Near Field Communication technology. It is designed for developers, product managers, and engineers who work with NFC and need clear definitions of terms like NDEF, APDU, anti-collision, and ISO 14443.

Each glossary term is cross-referenced with related NFC chips, standards, and other terms. For example, the term 'AES-128' links to chips that support AES encryption (NTAG 424 DNA, DESFire EV2/EV3), and the term 'ISO 14443' links to all chips compliant with that standard.

Yes. NFCFYI provides glossary definitions in 15 languages including English, Korean, Japanese, Chinese, Spanish, Portuguese, Hindi, Arabic, French, Russian, German, Turkish, Vietnamese, Indonesian, and Thai. Use the language selector in the header to switch languages.