MiFare Classic (13.56MHz RFID/NFC) Clear Keychain Fob - 1KB - Pimoroni
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MiFare Classic (13.56MHz RFID/NFC) Clear Keychain Fob - 1KB

ADA363
  • £3

    9 in stock

This is a blank MiFare Classic keychain fob - often used for electronic locks or customer identification but also found in other systems where a small and easy to carry tag is desired.

The tag contains a NXP S50 chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away.

These can be read by almost any 13.56MHz RFID/NFC reader but make sure it can handle MiFare cards as there are a few other encoding standards (like FeLica) They are tested and work great with both our PN532 NFC/RFID breakout board and Adafruit NFC/RFID Shield for Arduino!

  • These chips can be written to
  • can store up to 1 KB of data in writable EEPROM divided into banks
  • can handle over 100,000 re-writes.
  • You can use our PN532 NFC/RFID breakout board or Adafruit NFC/RFID Shield for Arduino to read and write data to the EEPROM inside the tag.
  • There is also a permanent 4-byte ID burned into the chip that you can use to identify one tag from another
  • the ID number cannot be changed.

These use the S50 chipset, which used to be the 'classic' NFC chipset. In ~2014, the NFC forum decided not to support this chipset anymore, so newer phones do not support the MiFare classic. This only matters if you're trying to use this tag with a phone/tablet.

S50 chip specification:

  • 1 KiloByte (8 KiloBit) non-volatile EEPROM storage
  • Built in encryption engine with 48-bit key
  • 4 Byte unique identifier burned into the chip
  • 13.56 MHz frequency

Tag specification:

  • 30mm x 25mm x 6mm / 1.2" x 1" x 0.2"
  • Weight: 4.3g
  • Works about 2" away from reader

Downloads: NXP S50 datasheet

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