For decades, credit cards have relied on magnetic stripes located on the reverse side of the card to store data. To transmit this data, the card must be swiped through a magnetic reader, making physical contact with the stripe. A contactless credit card, on the other hand, stores its data on a chip embedded in the card's plastic. This data is transmitted not magnetically, but rather via a tiny radio signal when the card comes in close proximity of a special reader at the checkout stand. This works through radio frequency identification technology, also known as RFID. When the chip comes close enough to the reader, an antenna on the chip is jolted to life by the electromagnetic field created by the reader, and transaction data is sent to into the system.
For starters, these RFID credit cards are much faster and more convenient than traditional magnetic stripe cards. A cardholder simply waves the card over the reader, waits a moment for the acceptence signal from the machine, and that's it. There's no need to fumble for cash, and with transactions under , there is no need to key in a PIN code or sign a receipt. Just wave and go. Also, since the card never leaves the user's hand, it is considered by some to be more secure.
NTAG216 chip with large capacity of 888 bytes(user programmable read/write memory) which is designed to fully comply to NFC Forum Type 2 Tag and ISO/IEC14443 Type A specifications.
NTAG213, NTAG215 AND NTAG216 from now on, we generally called NTAG21x. These 3 chips are particularly tailored for applications requiring small footprints, without compromise on performance. Small NFC tags can be more easily embedded into such as labels, contactless cards or electronic devices.
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