ST25TV02K vs ST25DV64K

ST25TV02K vs ST25DV64K

Two HF RFID chips from STMicroelectronics at 13.56 MHz, both with RFID tags." data-category="Data & Encoding">user memory beyond standard tags, but designed for fundamentally different applications. ST25TV02K is a security/anti-tamper chip; ST25DV64K is a dual-interface IoT component with large storage.

Overview

ST25TV02K (TV series: tamper+validation) targets brand protection and anti-counterfeit applications with its tamper-detect antenna loop, ECDSA digital signature, and 2 Kbit user memory. ST25DV64K (DV series: dual-interface) is an IoT bridge component with 64 Kbits of memory accessible via both coupling RFID standard." data-category="Standards & Protocols">ISO 15693 RF and I2C wired interfaces, plus energy harvesting. Both are ISO 15693-compliant and readable by standard HF RFID readers, but they serve different system architectures.

Key Differences

• Memory: ST25TV02K has 2,048 bits (256 bytes) of user memory. ST25DV64K has 65,536 bits (8,192 bytes) — 32 times more. For applications needing large on-tag data, ST25DV64K is in a different class.
• Tamper detection: ST25TV02K has a breakable tamper-detect antenna loop that permanently alters the tag's readable state when severed — enabling single-use seal applications. ST25DV64K has no tamper detection capability.
• Digital signature: ST25TV02K generates an ECDSA signature allowing a backend to verify chip authenticity. ST25DV64K has password-based memory protection but no cryptographic signature capability.
• Dual interface: ST25DV64K provides both ISO 15693 (RF) and I2C (wired) access to the same 8 KB memory bank. An MCU can update data over I2C while an NFC reader retrieves it over RF. ST25TV02K is RF-only.
• Energy harvesting: ST25DV64K can supply up to 3 mA from the RF field via Vout. ST25TV02K has no energy harvesting.
• Form factor: ST25TV02K is available in inlay/label format suitable for pressure-sensitive labels. ST25DV64K is primarily available in SO8N/TSSOP8 IC packages for PCB integration, less suited for label-grade deployment.
• Cost: ST25TV02K is priced for label-scale deployment. ST25DV64K is priced for module/PCB integration and is considerably more expensive per unit.

Use Cases

ST25TV02K suits: - Anti-counterfeit labels on pharmaceuticals, cosmetics, spirits, and luxury goods. - Tamper-evident seals where physical opening must be permanently detectable. - Brand protection programmes using ECDSA signature verification via smartphone app. - Single-use authentication seals on warranty cards, secure parcels, and regulated documents.

ST25DV64K suits: - IoT sensor nodes with MCU access over I2C and external NFC readout. - Smart packaging with large data payloads (full product certificates, multilingual content, firmware configuration). - Applications requiring energy harvesting from the RF field to power a connected circuit. - Development and prototyping of NFC-connected embedded systems.

Verdict

ST25TV02K and ST25DV64K are not alternatives — they are built for different system architectures. If you need a tamper-evident, cryptographically authenticated label for brand protection, choose ST25TV02K. If you need a wired+wireless shared memory component with large storage and optional energy harvesting in an embedded system, choose ST25DV64K. Attempting to use ST25DV64K as an anti-tamper label is impractical (wrong form factor, no tamper loop); attempting to use ST25TV02K as an IoT bridge is impossible (no I2C, no energy harvesting).