STMicroelectronics ST25DV64 Dynamic NFC/RFID tag IC

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.

Key features

• RS7947_PKG_SO8_ST25DVtransparency.png
• 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)

Additional features

• 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)

Applications

• Fast data transfer
• Firmware update in the field