NTAG 224 DNA vs ST25TA02KB

Choose NTAG 224 DNA if you need a dedicated NFC Forum Type 2 Tag solution for product authentication and tamper detection with moderate security requirements. The 224 DNA provides 208 bytes of user memory across 76 pages and operates on ISO/IEC 14443 Type A at 13.56 MHz. Its security architecture centers on AES-128 mutual authentication, AES-128 CMAC through SUN (Secure Unique NFC) messaging, ECC-based originality signatures, and a 7-byte UID with integrated NFC tap counter. The chip achieves Common Criteria EAL3+ certification with AVA.VAN.2 augmentation, suitable for anti-counterfeiting in consumer goods, pharmaceuticals, and supply chain applications where contactless-only RF interface is sufficient. The Type 2 Tag protocol offers simpler implementation and lower power consumption for read-dominant applications. Choose ST25TA02KB if you require a secure element with dual-interface capability and higher security certification for payment, identity, or high-value asset protection applications. The ST25TA02KB operates at 13.56 MHz with ISO/IEC 14443-A and NFC Forum Type 4 compliance, offering 256 bytes of EEPROM memory. It provides both RF contactless and I2C wired interfaces, enabling integration with host microcontrollers for complex transaction processing. Security capabilities include AES-128, 3DES encryption, ECC P-256 elliptic curve cryptography, and secure channel protocol (SCP) support, all validated to Common Criteria EAL5+ – a significantly higher certification than the 224 DNA. The Type 4 Tag protocol supports NDEF messaging with file-based data structures and is better suited for applications requiring cryptographic key storage, secure boot sequences, transit ticketing, or government identification where the I2C interface allows protected parameter configuration and the higher security certification meets stringent compliance requirements.