Description:

This RFID tag is really unique: it works with mobile phones just like other RFID tags, but you can reprogram it over I2C. The tag shows up as an ISO/IEC 15693 (13.56MHz) chip which is readable by phones and tablets. This could be interesting in situations where you want a  tag that can be re-written dynamically when connected to a controller. For example, we did a test where we had a microcontroller write different URLs a few seconds apart, and the mobile phone detected the different URLs one after the other.

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Features:

I2C interface

• Two-wire I2C serial interface supports 1MHz protocol
• Uses multiple I2C addresses 0x2D, 0x53 (user memory) and 0x57 (system memory)
• Single supply voltage: 1.8V to 5.5V
• Multiple byte write programming (up to 256 bytes)

Contactless interface

• Based on ISO/IEC 15693
• NFC Forum Type 5 tag certified by the NFC Forum
• Supports all ISO/IEC 15693 modulations, coding, sub-carrier modes and data rates
• Custom fast read access up to 53 Kbit/s
• Single and multiple blocks read (same for Extended commands)
• Single and multiple blocks write (up to 4) (same for Extended commands)
• Internal tuning capacitance: 28.5 pF

Memory

• 16-kbits of EEPROM
• I2C interface accesses bytes
• RF interface accesses blocks of 4 bytes
• Write time:
  • From I2C: typical 5ms for 1 byte
  • 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
  • 500k write cycles at 105 °C
  • 400k write cycles at 125 °C

Fast transfer mode

• Fast data transfer between I2C and RF interfaces
• Half-duplex 256-byte dedicated buffer

Energy harvesting

• Analog output pin to power 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: protected in write by a 64-bit password in RF and a 64-bit password in I2C

Product Dimensions: 31.7mm x 25.3mm x 4.6mm / 1.2" x 1.0" x 0.2"