ICODE SLI vs Tag-it HF-I Plus

Compare ICODE SLI (112 bytes user memory, EAS) vs Tag-it HF-I Plus (256 bytes, dual ISO standard). Both 13.56 MHz ISO 15693 chips for item tracking.

Side-by-side specs

Frequency
ICODE SLI
13.56 MHz
Protocol
ICODE SLI
ISO/IEC 15693-2, ISO/IEC 15693-3
Tag-it HF-I Plus
ISO/IEC 15693, ISO/IEC 18000-3
Memory
ICODE SLI
1024 bits (32 blocks × 4 bytes), 28 user blocks (112 bytes user memory)
Tag-it HF-I Plus
2048 bits (256 bytes) user memory organized in 64 blocks of 32 bits each, EEPROM
Interface
ICODE SLI
RF (contactless)
Tag-it HF-I Plus
RF (contactless)
Temp Range
ICODE SLI
Not specified in datasheet
Tag-it HF-I Plus
-40°C to +85°C
Form Factor
ICODE SLI
Wafer/die (for label integration)
Tag-it HF-I Plus
Wafer (200mm / 8 inch), die size 1296 × 1116 μm (excluding scribe), available with grinding to 265 μm or 150 μm, NI/AU or AU bumps, sawn on foil frame
Security
ICODE SLI
Unique 64-bit UID, block-level write protection (lock mechanism), EAS (Electronic Article Surveillance) bit, AFI (Application Family Identifier), DSFID (Data Storage Format…
Tag-it HF-I Plus
Individual block locking (user and factory lock bits), unique 64-bit UID factory-programmed and locked

Verdict

Choose ICODE SLI if you need Electronic Article Surveillance functionality, require AFI and DSFID fields for application-specific filtering, or prioritize retail and library use cases with 112 bytes of user memory across 28 blocks. The ICODE SLI operates at 13.56 MHz using ISO/IEC 15693-2 and ISO/IEC 15693-3 protocols, offers block-level write protection with permanent locking, and includes a dedicated EAS bit for anti-theft systems common in retail environments. Its 64-bit unique UID ensures item-level identification, making it suitable for inventory management where moderate memory (1024 bits total with 896 bits user-accessible) is sufficient and retail security features are valued. Choose Tag-it HF-I Plus if you require larger user memory capacity of 256 bytes organized in 64 blocks of 32 bits each, need compliance with both ISO/IEC 15693 and ISO/IEC 18000-3 standards, or want more granular data organization with smaller block sizes. The Tag-it HF-I Plus provides 2048 bits of total EEPROM memory—more than double the ICODE SLI's user capacity—making it better for applications requiring detailed product data, extended tracking information, or multiple data sets per tag. It features individual block locking with both user and factory lock bits for flexible security implementation and shares the same 13.56 MHz frequency and 64-bit factory-locked UID. The dual ISO standard compliance (15693 and 18000-3) offers broader compatibility with different reader infrastructures in supply chain and asset tracking scenarios where EAS functionality is not required.

FAQ

What is the memory difference between ICODE SLI and Tag-it HF-I Plus?

ICODE SLI provides 112 bytes of user memory (28 blocks × 4 bytes), while Tag-it HF-I Plus offers 256 bytes of user memory (64 blocks × 4 bytes), giving the Tag-it more than double the user-accessible storage capacity.

Do both chips support ISO 15693 protocol?

Yes, both chips support ISO/IEC 15693. The ICODE SLI supports ISO 15693-2 and 15693-3, while the Tag-it HF-I Plus additionally supports ISO/IEC 18000-3 for broader compatibility.

Which chip has Electronic Article Surveillance for retail?

Only the NXP ICODE SLI includes an EAS (Electronic Article Surveillance) bit and AFI/DSFID fields designed for retail and library anti-theft systems. The Tag-it HF-I Plus does not have dedicated EAS functionality.

Sourcing ICODE SLI or Tag-it HF-I Plus in volume?

Roxtron builds custom RFID and NFC products around both ICODE SLI and Tag-it HF-I Plus. Tell us your project — quantities, form factor, timeline — and we'll come back within 24 hours with pricing and lead times.