Compare different NFC Chips to better understand which one to choose between Mifare Classic, Ultralight, NTAG, ICODE, based on memory, compatibility, and other.

You can find different types of NFC Chips on Shop NFC, that can be grouped in 3 categories: Mifare or Mifare-compatible, Ultralight, NTAG Series.

In general, NTAG Series are compatilbe with every NFC device.

The Operative Frequency of NFC Tags is 13.56 MHz.

NFC Tags does not work on metal surfaces. If you need to use the NFC Tags close to metal, you should choose the On-Metal NFC Tags which are specially made for this purpose.

To better understand the technical characteristics of the different types of NFC Tags, please refer to the following tables, which will help you to better understand what kind of Tags you need.

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Technical specifications of NTAG NFC Tags

Total capacity (1) 168 bytes 164 bytes 180 bytes 540 bytes 924 bytes
Available memory (2) 137 bytes 128 bytes 144 bytes 504 bytes 888 bytes
URL length (3) 132 characters 122 characters 132 characters 492 characters 854 characters
Text length (4) 130 characters 120 characters 130 characters 490 characters 852 characters
V-Card Fields (5) 4-5 3-4 4-5 9-10 10 +
Why choose this chip Great for everything, from marketing to task launcher apps. Better performances, very high scan strength, faster reading speed, wider reading range. Perfect for every use. Great chip, very versatile.
It is expected that will replace the predecessor NTAG203.
Good memory, even if smaller than NTAG216. The latest chip, with higher capacity and high scan strength. Perfect for V-Card or other uses that require high storage.
NFC Forum Specifics (6) Type 2 Type 2 Type 2 Type 2 Type 2
Cryptography (7) No No No No No
Serial Number (UID) (8) Yes Yes Yes Yes Yes
Universal Compatibility (9) Yes Yes Yes Yes Yes
Password Protection (10) No Yes Yes Yes Yes
Scan Counter No No Yes Yes Yes

More info on NTAG chips

Technical specification of ICODE SLIX (ISO 15693, ISO 18000)

Total capacity (1) 32 bytes 112 bytes 160 bytes 316 bytes
Data Retention 50 years 50 years 50 years 50 years
Write Endurance 100.000 cycles 100.000 cycles 100.000 cycles 100.000 cycles
Why choose this chip Inventory, supply chain management, asset tracking, automation. Inventory, supply chain management, anti-counterfeting. Inventory, supply chain management, anti-counterfeting. Inventory, supply chain management, anti-counterfeting, asset tracking, ticketing.
NFC Forum Specifics (6) Type V Type V Type V Type V
Password protection No No Yes Yes
Serial Number (UID) (8) Yes (8 bytes) Yes (8 bytes) Yes (8 bytes) Yes (8 bytes)
Universal Compatibility (9) No No No No

More info on ICODE chips

Technical Specifications of other types of NFC Tags

Mifare Classic 1k Mifare Classic 4k
Mifare Ultralight EV1
Total capacity (1) 1 kb (1024 bytes) 4 kb (4048 bytes) 64 bytes
Available memory (2) 716 bytes 3440 bytes 46 bytes
URL length (3) 256 characters 2000 characters 41 characters
Text length (4) 709 characters about 3000 characters 39 characters
V-Card Fields (5) 9-10 10+ 1-2
Why choose this chip Uses that require Mifare stantard, or cryptography, or higher storage. Uses that require Mifare stantard, or cryptography, or even higher storage. Cost effective, short URLs, smart poster and general NFC use.
NFC Forum T2 (6) No No Yes
Cryptography (7) Yes Yes No
Serial number (8) Yes Yes Yes
Universal Compatibility (9) No No Format could be needed

More info on Mifare Classic - Mifare Ultralight - Mifare Desfire


  1. Total capacity: is the total memory of the Tag. Part of it, however, is not writable, as required for some functions.
  2. Available memory: the actual memory you have to write data to the NFC Tag.
  3. URL length: The maximum number of characters that a link on this Tag can contain, net of the 'http://www.'
  4. Text length: The maximum number of characters that you can write on this NFC Tag.
  5. V-Card Fields: V-Card is the standard for import or export contacts of an address book. The values are approximate because the number depends of the length of each field.
  6. NFC Forum specifications: compatibility with the technical specifications drawn up by the NFC Forum. For more information, please visit
  7. Encryption: a safety feature on the chip, which can help prevent the cloning is an advanced feature that requires technical skills, but not necessary for standard use.
  8. Serial Number: the Tag contains a unique ID.
  9. Universal Compatibility: nTag chips are the only compatible with every smartphone and tablet. To check other compatibility, see the list of NFC enabled smartphones and tablet
  10. Password Protection: nTag ICs can be protected with a password. A pw-protected NFC Tag cannot be overwritten, but can be read by everyone. You can use a 32-bit password. To use this feature, we recommend the NXP app, NFC TagWriter.

More general info on NFC Tags

MIFARE®, NTAG® and ICODE® are trademarks of NXP Semiconductors.