MIFARE Ultralight EV1 vs ST25TV02KC

Choose MIFARE Ultralight EV1 if you need NFC Forum Type 2 compatibility and mobile phone interaction is a priority. This chip operates on ISO/IEC 14443 Type A at 13.56 MHz, which is the standard supported by all NFC-enabled smartphones. The MF0UL11 variant provides 48 bytes (384 bits) of user memory, while the MF0UL21 offers 128 bytes (1024 bits). Security features include 32-bit password protection, ECC-based originality signature for authentication, three 24-bit one-way counters suitable for ticketing or loyalty applications, a 32-bit OTP area, and field-programmable read-only locking per page. The password attempt limiting option protects against brute-force attacks. This chip is ideal for mobile marketing, transit cards, event ticketing, and applications where smartphone compatibility and counter functionality are essential. Choose ST25TV02KC if you require ISO 15693 protocol compatibility and longer read range capabilities. This chip offers 256 bytes (2048 bits) of EEPROM organized in 64 blocks of 4 bytes each, providing more storage than both MIFARE Ultralight EV1 variants. It operates at 13.56 MHz using ISO/IEC 15693 and ISO/IEC 18000-3 mode 1, which enables longer reading distances (up to 1.5 meters) compared to ISO 14443A devices. Security includes 32-bit password protection, AFI for application filtering, DSFID for data format identification, EAS for retail anti-theft systems, and a permanent Kill command for end-of-life deactivation. This chip suits industrial tracking, asset management, library systems, supply chain applications, and retail environments where longer read range, higher memory capacity, and permanent deactivation features are required. Note that ISO 15693 has limited smartphone support compared to NFC Forum Type 2.