MIFARE Ultralight EV1 vs ST25TV512

Choose MIFARE Ultralight EV1 if you need ISO/IEC 14443 Type A compatibility, NFC Forum Type 2 support, or require one-way counters for application tracking. The MF0UL11 variant provides 48 bytes (384 bits) of user memory with 80 bytes total, while the MF0UL21 variant offers 128 bytes (1024 bits) of user memory with 164 bytes total capacity. This chip operates at 13.56 MHz and includes 32-bit password protection, an ECC-based originality signature for counterfeit prevention, three 24-bit one-way counters suitable for ticketing or loyalty applications, and a 32-bit OTP area for permanent data storage. Page-level field-programmable read-only locking allows granular access control, and optional password attempt limiting prevents brute-force attacks. The availability in 17 pF or 50 pF antenna capacitance variants enables optimization for different antenna designs. This chip suits transit tickets, event access, loyalty cards, and applications requiring authentication of genuine tags. Choose ST25TV512 if you require ISO/IEC 15693 protocol support, NFC Forum Type 5 compatibility, or need advanced privacy and anti-tampering features. The ST25TV512 provides 64 bytes (512 bits) of EEPROM user memory and operates at 13.56 MHz with longer read range characteristics typical of ISO 15693 tags. Security features include two 32-bit passwords that can be configured as one 64-bit password, TruST25 digital signature for authenticity verification, and password encryption to protect credentials during transmission. The chip supports Kill mode for permanent deactivation, Untraceable mode for privacy protection by hiding tag responses, optional tamper detection for physical security monitoring, and EAS (Electronic Article Surveillance) functionality for retail anti-theft systems. This chip is appropriate for supply chain tracking, pharmaceutical authentication, library management, retail item-level tagging, and applications where longer read range, privacy features, or tamper detection are critical requirements.