ICODE SLI vs ST25TV02K

Choose ICODE SLI if you need Electronic Article Surveillance functionality for retail or library applications, require a guaranteed unique 64-bit identifier for item tracking, or want compatibility specifically with ISO/IEC 15693-2 and 15693-3 systems. The chip provides 112 bytes of user memory across 28 writable blocks, with block-level write protection and a dedicated EAS bit that enables anti-theft systems. Both chips support AFI (Application Family Identifier) and operate at 13.56 MHz, but ICODE SLI includes DSFID (Data Storage Format Identifier) for standardized data organization in library systems. The write-once lock mechanism protects individual blocks from modification after deployment. Choose ST25TV02K if you require greater memory capacity (256 bytes total EEPROM versus 112 bytes user memory), need stronger access control through 32-bit password protection instead of simple block locking, or want to harvest energy from the RF field for powering external sensors or indicators. The ST25TV02K supports ISO/IEC 15693, ISO/IEC 18000-3 mode 1, and qualifies as NFC Forum Type 5, providing broader protocol compatibility than ICODE SLI. The energy harvesting output pin enables applications like temperature sensing or LED activation without batteries. With 64 blocks of 4 bytes each, ST25TV02K offers more than double the total storage, making it suitable for applications requiring extended data logging or multiple application datasets on a single tag. The password protection provides cryptographic access control beyond ICODE SLI's physical lock bits.