The NTAG21x family is comprised of four different products, defined around specific application categories. NTAG210, NTAG213, NTAG215 and NTAG216 will offer respectively 48, 144, 504 and 888 bytes of user memory, corresponding to the maximum message size that can be stored.
* 32-bit password authentication, which offers a simple protection mechanism for data stored into the tag
* UID ASCII mirror, which automatically maps the IC unique serial number to a stored NDEF message, thus greatly simplifying tag serialization e.g. in smart poster applications
* 24-bit NFC counter and NFC counter ASCII mirror, which measures the number of interactions occurred between NFC devices and the tag, and appends it to a stored NDEF message, e.g. to improve usage analytics in smart advertisement or location based services
* Integrated originality signature, which enables the detection of unauthorized NTAG copies, thus providing a simple but powerful product authentication method
* A new Fast Read command, which speeds up tag registration in inline processes such as print media or product label manufacturing
* A special variant of the NTAG216, called NTAG216F, which additionally offers a configurable Field Detection pin and a Sleep mode, features particularly required in electronics pairing applications.