ICODE SLIX2 vs ST25TV02KC

Choose ICODE SLIX2 if you need maximum user memory capacity, advanced cryptographic authentication, or integrated counter functionality. The SLIX2 provides 316 bytes of usable user memory (2528 bits across 79 accessible blocks) compared to the ST25TV02KC's 256 bytes, offering 23% more data storage. Its standout feature is the 32-byte ECC-based originality signature using the secp128r1 curve, enabling cryptographic verification of tag authenticity without requiring secure messaging during field operation. The chip includes a dedicated 16-bit counter in the final block, useful for usage tracking or anti-cloning applications. Security architecture features five separate 32-bit passwords controlling Read, Write, Privacy, Destroy, and EAS/AFI functions, plus block-level write protection and a page protection pointer for granular access control. Both chips comply with ISO/IEC 15693-2 and 15693-3 at 13.56 MHz, offer 50-year data retention and 100,000 write cycles, and include a unique 64-bit UID. Choose ST25TV02KC if you require permanent tag deactivation capability or need a cost-optimized ISO 15693 solution for straightforward applications. The ST25TV02KC's defining feature is its Kill command, which irreversibly disables the tag—critical for end-of-life privacy compliance or preventing reuse in certain supply chain scenarios. It provides 256 bytes organized in 64 four-byte blocks with single 32-bit password protection covering read/write operations. The chip supports AFI (Application Family Identifier), DSFID (Data Storage Format Identifier), and EAS (Electronic Article Surveillance) functions standard to ISO/IEC 15693 and ISO/IEC 18000-3 mode 1. While it lacks the SLIX2's ECC authentication and counter block, the ST25TV02KC offers adequate memory for item-level tagging, library systems, and supply chain tracking where cryptographic authentication is not mandatory. The simpler security model and kill functionality make it appropriate for single-use or privacy-sensitive applications where permanent deactivation outweighs the need for advanced authentication features.