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Dual-FrequencySTMicroelectronics

ST25DV

Dynamic NFC/RFID tag with fast transfer mode, I2C interface, energy harvesting, and dual-interface memory for IoT applications

Official Datasheet ↗
Frequency
13.56 MHz (NFC/RFID) + I2C interface
Protocol
ISO/IEC 15693, NFC Forum Type 5
Memory
4 Kbit, 8 Kbit, 16 Kbit, or 64 Kbit (512 bytes to 8 Kbytes) EEPROM
Interface
RF (contactless 13.56 MHz), I2C (up to 1 MHz)
Temp Range
-40°C to +85°C
Form Factor
SO8, TSSOP8, UFDFPN8

Full Specifications

ManufacturerSTMicroelectronics
Frequency CategoryDual-Frequency
Frequency13.56 MHz (NFC/RFID) + I2C interface
ProtocolISO/IEC 15693, NFC Forum Type 5
Memory4 Kbit, 8 Kbit, 16 Kbit, or 64 Kbit (512 bytes to 8 Kbytes) EEPROM
InterfaceRF (contactless 13.56 MHz), I2C (up to 1 MHz)
Temperature Range-40°C to +85°C
Form FactorSO8, TSSOP8, UFDFPN8
Security64-bit unique identifier, password protection (64-bit), RF write protection areas

Engineering Brief

The ST25DV is a dual-interface dynamic NFC tag that combines ISO 15693 RF communication at 13.56 MHz with a fast I2C interface, enabling simultaneous access from both microcontroller and NFC reader. It features Fast Transfer Mode for accelerated data exchange (up to 53 kbps), integrated energy harvesting capability to power external circuits from the RF field, and flexible memory partitioning with configurable access rights. Available in multiple memory densities (4K to 64Kbit EEPROM), it's ideal for IoT applications requiring wireless configuration, data logging, and NFC-based user interaction without draining system batteries.

Typical Applications

  • IoT sensor nodes with wireless data logging
  • Smart home and building automation devices
  • Industrial asset tracking and maintenance logging
  • Consumer electronics pairing and configuration
  • Medical device data storage and traceability
  • Energy harvesting applications for battery-free operation

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