ST25TV02K vs Tag-it HF-I Standard

ST25TV02K offers NFC Forum Type 5 support and energy harvesting output, while Tag-it HF-I provides granular per-block locking. Both deliver 256 bytes at 13.56 MHz.

Side-by-side specs

Frequency

ST25TV02K: 13.56 MHz
Tag-it HF-I Standard: 13.56 MHz

Protocol

ST25TV02K: ISO/IEC 15693, ISO/IEC 18000-3 mode 1, NFC Forum Type 5
Tag-it HF-I Standard: ISO/IEC 15693, ISO/IEC 18000-3

Memory

ST25TV02K: 256 bytes (2048 bits) EEPROM, organized in 64 blocks of 4 bytes
Tag-it HF-I Standard: 2048 bits (256 bytes) user memory organized in 64 blocks of 32 bits (4 bytes) each, plus 64-bit UID, DSFID, AFI

Interface

ST25TV02K: RF (contactless), Energy Harvesting output
Tag-it HF-I Standard: RF (contactless)

Temp Range

ST25TV02K: -25°C to +85°C
Tag-it HF-I Standard: -40°C to +85°C operating, -40°C to +125°C storage

Form Factor

ST25TV02K: SO8, TSSOP8, UFDFPN8
Tag-it HF-I Standard: Wafer (200 mm / 8 inch diameter, 265 µm thick after grinding), die size 1296 µm × 1116 µm, bumped (Ni/Au chemical bumps, 25 µm height)

Security

ST25TV02K: 32-bit password protection, lock bits, AFI (Application Family Identifier)
Tag-it HF-I Standard: Individual block locking (user lock and factory lock per block), irreversible write protection

Spec	ST25TV02K	Tag-it HF-I Standard
Frequency	13.56 MHz	13.56 MHz
Protocol	ISO/IEC 15693, ISO/IEC 18000-3 mode 1, NFC Forum Type 5	ISO/IEC 15693, ISO/IEC 18000-3
Memory	256 bytes (2048 bits) EEPROM, organized in 64 blocks of 4 bytes	2048 bits (256 bytes) user memory organized in 64 blocks of 32 bits (4 bytes) each, plus 64-bit UID, DSFID, AFI
Interface	RF (contactless), Energy Harvesting output	RF (contactless)
Temp Range	-25°C to +85°C	-40°C to +85°C operating, -40°C to +125°C storage
Form Factor	SO8, TSSOP8, UFDFPN8	Wafer (200 mm / 8 inch diameter, 265 µm thick after grinding), die size 1296 µm × 1116 µm, bumped (Ni/Au chemical bumps, 25 µm height)
Security	32-bit password protection, lock bits, AFI (Application Family Identifier)	Individual block locking (user lock and factory lock per block), irreversible write protection

Verdict

Choose the ST25TV02K if you need NFC Forum Type 5 compatibility for smartphone interactions or require energy harvesting capabilities to power external circuits from the RF field. This chip provides 256 bytes of EEPROM organized in 64 blocks of 4 bytes, operates on ISO 15693 and ISO 18000-3 mode 1 protocols at 13.56 MHz, and includes 32-bit password protection for access control. The energy harvesting output is particularly valuable in applications where you need to drive sensors or indicators without a battery, and the NFC Forum Type 5 certification ensures interoperability with modern NFC-enabled smartphones and readers. The password protection allows you to restrict read or write operations across memory sections, while lock bits and AFI support enable application-specific filtering. Choose the Tag-it HF-I Standard if you require fine-grained security through individual block locking or need proven ISO 15693/18000-3 compliance without NFC Forum certification. This chip also provides 256 bytes of user memory in 64 blocks of 4 bytes at 13.56 MHz, plus a 64-bit UID, DSFID, and AFI fields. The key differentiator is its dual-level block protection system: each of the 64 blocks can be individually locked using either user-configurable locks or factory locks, with irreversible write protection preventing any future modification. This granular control is essential for applications requiring partial memory updates while permanently protecting critical data, such as in supply chain tracking or document authentication where some fields must remain immutable while others update throughout the product lifecycle. The lack of energy harvesting and NFC Forum Type 5 support makes this a more traditional RFID solution focused on industrial inventory and identification systems rather than consumer smartphone interactions.

FAQ

What is the memory difference between ST25TV02K and Tag-it HF-I Standard?

Both chips offer identical user memory capacity of 256 bytes (2048 bits) organized in 64 blocks of 4 bytes each. The Tag-it HF-I includes additional 64-bit UID, DSFID, and AFI fields beyond the 256-byte user area.

Can Tag-it HF-I Standard work with NFC smartphones?

Tag-it HF-I Standard supports ISO 15693 protocol which some NFC phones can read, but it lacks NFC Forum Type 5 certification. The ST25TV02K is NFC Forum Type 5 certified, ensuring standardized compatibility with NFC-enabled smartphones.

Which chip offers better security features?

The ST25TV02K uses 32-bit password protection for access control across memory sections. The Tag-it HF-I Standard provides individual block locking with both user and factory lock options per block, offering more granular but irreversible write protection at the block level.

Sourcing ST25TV02K or Tag-it HF-I Standard in volume?

Roxtron builds custom RFID and NFC products around both ST25TV02K and Tag-it HF-I Standard. Tell us your project — quantities, form factor, timeline — and we'll come back within 24 hours with pricing and lead times.