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Dual-FrequencySTMicroelectronics

ST25DV-I2C

Dynamic NFC/RFID tag with I2C interface, ISO 15693 and NFC Forum Type 5 compliant, enabling dual-interface communication

Official Datasheet ↗
Frequency
13.56 MHz
Protocol
ISO/IEC 15693, NFC Forum Type 5
Memory
4 Kbit, 8 Kbit, or 64 Kbit EEPROM (512 bytes, 1 Kbyte, or 8 Kbyte)
Interface
RF (contactless 13.56 MHz), I2C (fast mode up to 1 MHz)
Temp Range
-40°C to +85°C
Form Factor
SO8, UFDFPN8, TSSOP8

Full Specifications

ManufacturerSTMicroelectronics
Frequency CategoryDual-Frequency
Frequency13.56 MHz
ProtocolISO/IEC 15693, NFC Forum Type 5
Memory4 Kbit, 8 Kbit, or 64 Kbit EEPROM (512 bytes, 1 Kbyte, or 8 Kbyte)
InterfaceRF (contactless 13.56 MHz), I2C (fast mode up to 1 MHz)
Temperature Range-40°C to +85°C
Form FactorSO8, UFDFPN8, TSSOP8
Security64-bit password protection, 64-bit unique identifier (UID), RF and I2C write protection per area

Engineering Brief

The ST25DV-I2C is a dynamic NFC/RFID tag offering true dual-interface operation with simultaneous RF (13.56 MHz, ISO 15693/NFC Type 5) and I2C connectivity. Available in memory variants from 4 Kbit to 64 Kbit, it enables microcontrollers to write data via I2C while allowing contactless readout via NFC readers without powering the main system. Features include configurable memory partitioning, energy harvesting output, fast transfer mode (FTM), and mailbox functionality for RF-to-I2C communication, making it ideal for IoT applications requiring wireless configuration, logging, or parameter exchange.

Typical Applications

  • Smart appliances and consumer electronics configuration
  • Industrial asset tracking and maintenance logging
  • Medical device identification and parameter storage
  • Secure product authentication and anti-counterfeiting
  • IoT device commissioning and parameter management
  • Wireless sensor data storage and collection

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