ICODE SLIX vs ICODE SLIX2

Choose ICODE SLIX if you need a compact 13.56 MHz ISO 15693 solution with moderate storage requirements and basic security. It provides 896 bits (112 bytes) of user memory organized in 32 blocks of 4 bytes each, suitable for item identification, library systems, or supply chain tracking where data payloads are small. The chip includes a non-alterable 64-bit UID for tracking and offers 32-bit password protection for EAS (Electronic Article Surveillance) and AFI (Application Family Identifier) functions. Individual memory blocks can be locked to prevent modification, and the chip supports DSFID for library applications. Operating on 13.56 MHz with ISO/IEC 15693-2, ISO/IEC 15693-3, and ISO/IEC 18000-3 compliance, it provides reliable contactless communication at standard HF reading distances. This chip is cost-effective for applications where authentication beyond basic password protection is not required and where 112 bytes of user storage is sufficient. Choose ICODE SLIX2 if you require significantly more memory capacity, cryptographic authentication, or advanced access control with multiple independent passwords. It delivers 2528 bits (316 bytes) of usable user memory across 80 blocks, nearly three times the SLIX capacity, making it suitable for applications storing product details, maintenance logs, or multi-page documentation. The defining feature is the 32-byte ECC-based originality signature using the secp128r1 elliptic curve, enabling cryptographic verification that the chip is genuine NXP silicon—critical for anti-counterfeiting in pharmaceuticals, luxury goods, or electronics. SLIX2 implements five independent 32-bit passwords controlling Read, Write, Privacy, Destroy, and EAS/AFI functions separately, versus SLIX's single EAS/AFI password. It offers 50-year data retention and 100,000 write cycles endurance. Additional features include block-level write protection, a page protection pointer for flexible memory partitioning, privacy mode to hide the UID until authenticated, and a permanent destroy mode to irreversibly disable the chip. Operating on the same 13.56 MHz ISO 15693 standard, SLIX2 is the choice when brand protection, granular security, or extended data storage justifies the higher cost.