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

Description

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 & store up to 1 KB of data in writable EEPROM divided into banks, and 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.

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:

38.39mm / 1.51 ″ x 38.39mm / 1.51 ″ x 5.04mm / 0.2 ″
8.68g
Works about 2 ″ away from reader

NXP S50 datasheet

Product information