NFC cards with a NTAG216 chip are plastic cards with a standard credit card dimension (86 x 54 x 0.85 mm). The top layer contains a coating so the cards can be printed with thermal printers.
They operate on a frequency of 13.56 MHz, which is a frequency range for proximity cards that operate within proximity distances – usually up to 10 cm.
NTAG216 is a NFC Type2 chip, is compatible to the ISO/IEC 14443-3A standard, and has a 7-byte long unique ID number that can be used for identification purposes.
The most frequent use of NTAG216 chips is to store the content of a digital business card. The standard format for exchange business card information is called ‘vCard.’
Such a card is automatically recognized by various NFC phones, even with different operating systems, and the user can easily transfer a contact information to his phone.
The encoding of the vCard is quite simple and can be done even with free NFC apps like the NFC Tools. You have to click “Add Record” – select “Contact” – write your data in the fields, and click “Write.”
Technical specification for cards with NTAG216 chips
Chip manufacturer: NXP Semiconductors
Chip: NTAG216
Standards: ISO/IEC 14443-3A (NFC Type 2).
Memory size: 888 bytes of data
Security: 7-byte long preprogrammed chip Unique ID number, ECC-based originality signature, 32-bit password protection to prevent unauthorized memory operations and Field programmable read-only locking function
Operating frequency: 13.56 MHz
Reading distance: up to 10 cm (usually up to 5 cm)
Card dimensions: CR80 (85.60 x 53.98 mm)
Thickness: 0.84 mm
Material: PVC
Printing options: offset print, thermo re-transfer, thermo transfer
Technical documentation for chips NTAG216 and software tools are available here:
https://www.nxp.com/products/rfid-nfc/nfc-hf/ntag-for-tags-labels/ntag-213-215-216-nfc-forum-type-2-tag-compliant-ic-with-144-504-888-bytes-user-memory:NTAG213_215_216
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