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ST25DV04K：4-Kbit Dynamic NFC/RFID tag NFC Forum type V with I2C interface, fast transfer mode and energy harvesting

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

• I2 C interface
  • Two-wire I2C serial interface supports 1MHz protocol
  • Single supply voltage: 1.8V to 5.5V
  • Multiple byte write programing (up to 256 bytes)
• Contactless interface
  • Based on ISO/IEC 15693 and NFC Forum Type 5 tag
  • Supports all ISO/IEC 15693 modulations, coding, subcarrier modes and data rates
  • Custom Fast read access up to 53 Kbit/s
  • Single and multiple blocks read1
  • Single and multiple blocks write(1) (up to 4)
  • Internal tuning capacitance: 28.5 pF
• Memory
  • 1 million write cycles at 25 °C
  • 600k write cycles at 85 °C
  • 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
    • RF interface accesses blocks of 4 bytes
  • Data retention: 40 years
  • Write cycles endurance:
    • 1 million write cycles at 25 °C
    • 600k write cycles at 85 °C
    • 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
      • RF interface accesses blocks of 4 bytes
    • Data retention: 40 years
• Fast Transfer Mode
  • Fast data transfer between I2C and RF interfaces
  • Half-duplex 256-byte dedicated buffer
• Energy harvesting
  • Analog output pin for powering external components
• Data protection
  • User 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
• GPO
  • Interruption 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 mode2
  • Input pin to trigger low power mode
• RF management
  • RF command interpreter enabled/disabled from I2C host controller
• Temperature range
  • From - 40 to 85 °C
• Package
  • 8-pin and 12-pin packages.
  • ECOPACK2® (RoHS compliant)

Product Specifications

Application Notes

Flyers

ST25 - NFC / RFID Software

Sample & Buy

Quality & Reliability