ICODE SLIX2 vs Tag-it HF-I Plus

Choose ICODE SLIX2 if you need advanced security features and slightly more memory capacity. The chip provides 2528 bits (316 bytes) of usable user memory with 50-year retention and 100,000 write cycles. Its security implementation is substantially more sophisticated, offering 32-byte ECC-based originality signatures using secp128r1 for product authentication, five separate 32-bit passwords controlling Read, Write, Privacy, Destroy, and EAS/AFI functions, plus block-level write protection and privacy mode that hides the UID until authenticated. The chip includes a dedicated 16-bit counter in the last block and supports both ISO/IEC 15693-2 and 15693-3 protocols at 13.56 MHz. This makes it suitable for applications requiring cryptographic authentication, brand protection, or granular access control across pharmaceutical tracking, luxury goods authentication, or supply chain management where counterfeiting prevention is critical. Choose Tag-it HF-I Plus if you need a straightforward, cost-effective ISO 15693 solution with adequate security for basic item tracking. The chip offers 2048 bits (256 bytes) of EEPROM user memory organized in 64 blocks of 32 bits each, operating at 13.56 MHz with compliance to both ISO/IEC 15693 and ISO/IEC 18000-3 standards. Security is limited to individual block locking using user and factory lock bits, plus a factory-programmed 64-bit UID that cannot be changed. While it lacks password protection and cryptographic authentication features, the block-level locking and permanent UID provide sufficient security for library systems, document tracking, inventory management, and supply chain applications where basic read/write protection is adequate. The slightly lower memory (60 bytes less than SLIX2) is offset by proven reliability in high-volume item-level tagging deployments.