ST25TV02KC vs Tag-it HF-I Plus

ST25TV02KC offers password protection, EAS, and kill command; Tag-it HF-I Plus has block locking and factory-locked UID. Both are ISO 15693 with 256 bytes.

Side-by-side specs

Frequency

ST25TV02KC: 13.56 MHz
Tag-it HF-I Plus: 13.56 MHz

Protocol

ST25TV02KC: ISO/IEC 15693, ISO/IEC 18000-3 mode 1
Tag-it HF-I Plus: ISO/IEC 15693, ISO/IEC 18000-3

Memory

ST25TV02KC: 256 bytes (2048 bits) EEPROM, organized in 64 blocks of 4 bytes
Tag-it HF-I Plus: 2048 bits (256 bytes) user memory organized in 64 blocks of 32 bits each, EEPROM

Interface

ST25TV02KC: RF (contactless)
Tag-it HF-I Plus: RF (contactless)

Temp Range

ST25TV02KC: -25°C to +85°C
Tag-it HF-I Plus: -40°C to +85°C

Form Factor

ST25TV02KC: SO8, TSSOP8, UFDFPN8
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

ST25TV02KC: 32-bit password protection, AFI (Application Family Identifier), DSFID (Data Storage Format Identifier), EAS (Electronic Article Surveillance), Kill command for permanent…
Tag-it HF-I Plus: Individual block locking (user and factory lock bits), unique 64-bit UID factory-programmed and locked

Spec	ST25TV02KC	Tag-it HF-I Plus
Frequency	13.56 MHz	13.56 MHz
Protocol	ISO/IEC 15693, ISO/IEC 18000-3 mode 1	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 each, EEPROM
Interface	RF (contactless)	RF (contactless)
Temp Range	-25°C to +85°C	-40°C to +85°C
Form Factor	SO8, TSSOP8, UFDFPN8	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	32-bit password protection, AFI (Application Family Identifier), DSFID (Data Storage Format Identifier), EAS (Electronic Article Surveillance), Kill command for permanent…	Individual block locking (user and factory lock bits), unique 64-bit UID factory-programmed and locked

Verdict

Choose the ST25TV02KC if you need password-based access control, Electronic Article Surveillance functionality, or the ability to permanently deactivate tags with a kill command. Both chips operate at 13.56 MHz with ISO/IEC 15693 and ISO/IEC 18000-3 mode 1 protocols, offering identical 256 bytes (2048 bits) of EEPROM organized in 64 blocks of 4 bytes. The ST25TV02KC distinguishes itself through 32-bit password protection that restricts unauthorized access, AFI and DSFID identifiers for application-specific filtering, and EAS support for retail anti-theft systems. The kill command enables permanent tag deactivation when items leave the supply chain, which is valuable for privacy protection and preventing tag reuse. This makes it suitable for applications requiring controlled access, retail security, and lifecycle management where tags must be irrevocably disabled. Choose the Tag-it HF-I Plus if you require granular memory protection through individual block locking rather than password-based access. This chip provides the same 2048 bits (256 bytes) organized in 64 blocks of 32 bits, supporting ISO/IEC 15693 and ISO/IEC 18000-3 protocols at 13.56 MHz. The Tag-it HF-I Plus uses both user-programmable and factory lock bits, allowing permanent write protection on a per-block basis to secure critical data like calibration parameters or product identifiers. Every tag includes a unique factory-programmed and locked 64-bit UID, ensuring traceability without requiring additional programming steps. This approach offers simpler implementation for item-level tracking, asset management, and library systems where permanent data storage with selective write protection is more important than password-controlled access or EAS functionality.

FAQ

What is the memory difference between ST25TV02KC and Tag-it HF-I Plus?

Both chips have identical memory capacity of 256 bytes (2048 bits) organized in 64 blocks. The ST25TV02KC uses 4-byte blocks while the Tag-it HF-I Plus uses 32-bit (4-byte) blocks, making them functionally equivalent in storage.

Which chip offers better security for access control?

The ST25TV02KC provides 32-bit password protection for access control, while the Tag-it HF-I Plus uses individual block locking with user and factory lock bits. Password protection is better for controlled access scenarios, while block locking is ideal for permanent data protection.

Do both chips support Electronic Article Surveillance?

Only the ST25TV02KC supports EAS (Electronic Article Surveillance) functionality for retail anti-theft systems. The Tag-it HF-I Plus does not have native EAS support and is designed primarily for item tracking and asset management.

Sourcing ST25TV02KC or Tag-it HF-I Plus in volume?

Roxtron builds custom RFID and NFC products around both ST25TV02KC 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.