MiFare Classic (13.56MHz RFID / NFC) Charm - 1KB

Description

This is a blank MiFare Classic tag embedded in a phone charm. These tags are like those often used for train / bus passes but also found in other systems where proximity card 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. Since this tag has a small antenna, it has to be closer to the antenna than, say, a large credit card sized tag.

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:

39.82mm x 24.85mm x 4mm
loop is 140mm / 5.5 ″
4.5 grams with loop, 4 grams without
Works about 1 ″ away from RFID reader

NXP S50 datasheet

Product information