ICODE SLIX-S vs ST25TV512

ICODE SLIX-S offers 112 bytes user memory with EAS/AFI password protection. ST25TV512 provides 64 bytes with TruST25 digital signature and kill mode.

Side-by-side specs

Frequency
ICODE SLIX-S
13.56 MHz
ST25TV512
13.56 MHz
Protocol
ICODE SLIX-S
ISO/IEC 15693-3, ISO/IEC 15693-2, ISO/IEC 18000-3
ST25TV512
ISO/IEC 15693, NFC Forum Type 5
Memory
ICODE SLIX-S
1024 bits (128 bytes), organized in 32 blocks of 4 bytes each; 896 bits (112 bytes) user memory
ST25TV512
512 bits (64 bytes) EEPROM user memory
Interface
ICODE SLIX-S
RF contactless (no battery required), data rate up to 53 kbit/s
ST25TV512
RF (contactless)
Temp Range
ICODE SLIX-S
-40°C to +85°C (junction)
ST25TV512
-40°C to +85°C
Form Factor
ICODE SLIX-S
Wafer (SL2S2002FUD, SL2S2102FUD, 120 μm, 200 mm diameter), XSON3 (SOT1122, 1 x 1.45 x 0.5 mm), MOA8 (SOT500-4, 35 mm wide tape)
ST25TV512
UFDFPN5 (1.7×1.4 mm), sawn/bumped wafer (75 µm or 120 µm)
Security
ICODE SLIX-S
Unique 64-bit UID (read-only), 32-bit EAS/AFI password protection, block-level write protection, lock mechanism for DSFID/AFI/EAS
ST25TV512
Two 32-bit passwords (or one 64-bit), TruST25 digital signature, Kill mode, Untraceable mode, password encryption, tamper detect (optional), EAS

Verdict

Choose ICODE SLIX-S if you need larger user memory capacity and simplified password protection for retail or library applications. This chip provides 112 bytes of user memory (896 bits) organized in 32 blocks of 4 bytes each, nearly double the ST25TV512's 64 bytes. It operates on ISO/IEC 15693-3, ISO/IEC 15693-2, and ISO/IEC 18000-3 protocols at 13.56 MHz with data rates up to 53 kbit/s. Security features include a unique 64-bit read-only UID, 32-bit EAS/AFI password protection, block-level write protection, and lock mechanisms for DSFID/AFI/EAS. The EAS (Electronic Article Surveillance) and AFI (Application Family Identifier) features make it particularly suited for retail inventory management, library book tracking, and general asset management where additional memory for product information or bibliographic data is valuable. Choose ST25TV512 if you require advanced cryptographic security features and anti-counterfeiting protection despite lower memory capacity. With 64 bytes of EEPROM user memory, this chip trades storage space for enhanced security through TruST25 digital signature capability, which provides cryptographic authentication not available in the ICODE SLIX-S. It supports ISO/IEC 15693 and NFC Forum Type 5 protocols at 13.56 MHz. Security includes two 32-bit passwords (or one 64-bit), password encryption, Kill mode for permanent deactivation, Untraceable mode for privacy protection, optional tamper detection, and EAS functionality. The digital signature feature enables brand protection and product authentication applications where verifying chip genuineness is critical, such as pharmaceutical tracking, luxury goods authentication, or secure document management. The optional tamper detect feature adds physical security monitoring unavailable in the SLIX-S.

FAQ

What is the memory difference between ICODE SLIX-S and ST25TV512?

ICODE SLIX-S provides 112 bytes (896 bits) of user memory across 32 blocks, while ST25TV512 offers 64 bytes (512 bits) of EEPROM user memory. The SLIX-S has 75% more usable storage space for application data.

Do both chips support ISO/IEC 15693 protocol?

Yes, both chips support ISO/IEC 15693 at 13.56 MHz. The ICODE SLIX-S supports ISO/IEC 15693-2, 15693-3, and ISO/IEC 18000-3, while the ST25TV512 supports ISO/IEC 15693 and is NFC Forum Type 5 compliant.

Which chip has better anti-counterfeiting security features?

ST25TV512 provides superior anti-counterfeiting protection with TruST25 digital signature capability, password encryption, and optional tamper detection. ICODE SLIX-S offers basic protection with 32-bit EAS/AFI password and block-level write protection but lacks cryptographic authentication.

Sourcing ICODE SLIX-S or ST25TV512 in volume?

Roxtron builds custom RFID and NFC products around both ICODE SLIX-S and ST25TV512. Tell us your project — quantities, form factor, timeline — and we'll come back within 24 hours with pricing and lead times.