How to Choose NTAG213, NTAG215 or NTAG216

Compare user memory, then measure your message

NXP lists 144, 504 and 888 bytes of user read/write memory for NTAG213, NTAG215 and NTAG216 respectively. All three are NFC Forum Type 2 Tag devices operating at 13.56 MHz. Compare user memory rather than total chip memory when reviewing a quotation. Encode the final URL, text or records with your intended writing tool and inspect the complete NDEF message before selecting the device. Query parameters, language encoding and record structure can change the required space; a visible character count is not a reliable acceptance test.

• NTAG213: 144 bytes of user memory
• NTAG215: 504 bytes of user memory
• NTAG216: 888 bytes of user memory

Let the content and application drive the choice

For a short destination URL, start by testing whether the complete message fits NTAG213. Longer text, multiple records or contact details may justify reviewing NTAG215 or NTAG216. Consider whether changing information belongs on a maintained website instead of being stored on every physical item. A stable web entry can simplify future content changes. If the consuming application requires a specific chip or data layout, follow that specification; greater memory alone does not establish application compatibility.

Review construction and access control separately

The same chip can appear in a blank card, label or flexible assembly. Specify the dimensions, mounting surface, covering materials and target reader, then test the finished construction. More memory does not establish a longer reading distance. NXP documents password protection and read-only locking; agree who manages those settings and whether later updates are required. For sensitive rights or item authentication, have the system designer confirm the complete security architecture. A publicly readable URL should not be treated as proof of authenticity.

Approve a sample and a repeatable production rule

Send sample content, quantity, physical dimensions, artwork requirements and whether each item needs a unique link. Write samples using the planned production method and check readability, the destination and rewrite behaviour with representative phones or readers. Decide on locking only after verifying the data and keep an updateable test sample. Agree the encoding list, duplicate-data checks, inspection method and handling of failed items for the production order. Record the approved version so replenishment uses the same tested rule.