NTAG 223 DNA vs ST25TN512

Choose NTAG 223 DNA if you need authenticated NFC communication with cryptographic integrity. With 144 bytes of user memory and 240 bytes total EEPROM organized in 60 pages, it offers more than twice the storage of the ST25TN512. The NTAG 223 DNA implements ISO/IEC 14443 Type A protocol and NFC Forum Type 2 specification, making it compatible with virtually all NFC smartphones. Its security architecture includes AES-128 CMAC for Secure Unique NFC (SUN) message authentication, ECC-based originality signatures to verify chip authenticity, and Common Criteria EAL3+ certification with AVA.VAN.2 vulnerability assessment. The 32-bit password protection and 7-byte UID provide additional access control. This chip suits product authentication, anti-counterfeiting applications, trusted IoT deployments, and scenarios requiring cryptographically signed dynamic URLs. The 13.56 MHz operating frequency ensures standard NFC reader compatibility. Choose ST25TN512 if you need a basic ISO 15693 tag with lower memory requirements and longer read range capability. With 512 bits (64 bytes) of EEPROM, this chip provides sufficient storage for simple identification, access control tokens, or minimal data logging where 64 bytes suffice. The ST25TN512 implements ISO/IEC 15693 protocol and NFC Forum Type 5 specification, which typically enables reading distances up to 1.5 meters with appropriate readers—significantly longer than Type 2 tags. Security is limited to 32-bit password protection and lock bits for write protection, without cryptographic authentication or originality verification. This chip operates at 13.56 MHz and suits applications like asset tracking, inventory management, library systems, and access control where extended read range matters more than data capacity or cryptographic security. It represents a cost-effective solution for basic identification tasks that don't require the authentication features of the NTAG 223 DNA.