NFC/RFID Tag NFC Forum Type V with I2C Interface, Fast Transfer Mode and Energy Harvesting


  • Two-wire I2C serial interface supports 1MHz protocol
  • Single supply voltage: 1.8V to 5.5V
  • Custom Fast read access up to 53 Kbit/s
  • Memory Up to 64-kb of EEPROM (depending on version)

The ST25DV device is a Dynamic NFC/RFID tag IC with a dual interface, fast transfer mode, energy harvesting, configurable interrupt capability, RF management and low power mode(2).It embeds an EEPROM memory and a dedicated memory buffer for fast data transfer. It can be operated from an I2C interface or by a 13.56 MHz RFID reader or a NFC phone. The I2C two-wire interface behaves as a slave in the I2C protocol. The contactless interface is compatible with ISO/IEC 15693 standard and NFC Forum type 5 tag.

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  • I2C interface
  • Two-wire I2C serial interface supports 1MHz protocol
  • Multiple byte write programing (up to 256 bytes)
  • Contactless interfaceBased on ISO/IEC 15693 and NFC Forum Type 5 tag
  • Supports all ISO/IEC 15693 modulations, coding, subcarrier modes and data rates
  • Single and multiple blocks read 1
  • Single and multiple blocks write(1) (up to 4)
  • Internal tuning capacitance: 28.5 pF
  • I2C interface accesses bytes
  • RF interface accesses blocks of 4 bytes
  • Write time:From I2C: typical 5ms for 1 to 4 bytes
  • From RF: typical 5ms for 1 block
  • Data retention: 40 years
  • Write cycles endurance:1 million write cycles at 25° C
  • 600k write cycles at 85° C
  • Fast Transfer ModeFast data transfer between I2C and RF interfaces
  • Half-duplex 256-byte dedicated buffer
  • Energy harvestingAnalog output pin for powering external components
  • Data protectionUser memory: 1 to 4 configurable areas, protectable in read and/or write by three 64-bit passwords in RF and one 64-bit password in I2C
  • System configuration: protectable in write by a 64-bit password in RF and a 64-bit password in I2C
  • GPOInterruption pin configurable on multiple RF events (field change, memory write, activity, Fast Transfer end, user set/reset/pulse)
  • Open Drain or CMOS output (depending on version)
  • Low power mode2Input pin to trigger low power mode
  • RF managementRF command interpreter enabled/disabled from I2C host controller
  • Temperature rangeFrom - 40 to 85° C
  • Package8-pin and 12-pin packages.
  • ECOPACK2® (RoHS compliant)
  • Fast data transfer
  • Firmware update in the field