359~ Datasheet by Adafruit Industries LLC

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WIRELESS / RFID / NFC
MiFare Classic (13.56MHz RFID/NFC) Card -
1KB
PRODUCT ID: 359
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Page 2 of 2 http://www.adafruit.com/products/359 7/21/2015
-DESCRIPTION
This is a blank MiFare Classic card - often used for train/bus passes but also found
in other systems where a 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.
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.
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.
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