1. Learn
  2. Tech
  3. NFC Chips
  4. NXP NTAG424


Introduced in 2019, the NTAG424 DNA chip revolutionized the landscape of authentication technology, succeeding its predecessor, the NTAG413.

Engineered with an array of advanced security features, this second-generation frictionless authentication chip has become the gold standard for a spectrum of applications, notably in anti-counterfeit measures, phygital (physical to digital) experiences, and projects rooted in the Web3 framework.

The user memory architecture of the NTAG424 is distinctive, divided into three 'files,' adding a layer of complexity in understanding the available memory. Typically, the user memory is referred to as 256 bytes, aligning with the size of the primary 'NDEF' storage file.

This measurement dictates the capacity for storing data such as URLs, providing substantial space for a wide array of use cases.

SUN dynamic data

An enhanced variant, the NTAG424 TT version, introduces 'tag tamper' functionality, bolstering its security features. The inclusion of the 'SUN' feature enables the dynamic addition of encrypted data into the NDEF data, further expanding the chip's utility. Noteworthy additional attributes encompass 5 key slots, supplementary memory for non-NDEF data, encryption capabilities, and dynamic NDEF substitution of SDM metadata. This dynamic substitution allows the encryption and incorporation of UID + Counter data into the URL.

Encoding the intricate authentication features of the NTAG424 poses a challenge, requiring specialized expertise beyond the capabilities of the usual NFC mobile phone apps. Most customers choose to use Seritag's encoding services for these more advanced chips.

Key Features

User Memory
256 Bytes
249 Chars*
Total Memory
416 Bytes

Key Specifications

Chip SeriesNTAG
NFC ForumType 4

Phone compatibility


Typical Use Cases

  • Anti-counterfeit
  • Authentication
  • Phygital

User Features

Total memory (bytes)416
User memory (bytes)256
Max URL (chars)249
UID (bytes)7
ECC signature
32-bit password-
UID ASCII mirror
Scan Counter
Counter ASCII mirror

Technical Specifications

Chip thickness75 µm / 120 µm
NFC ForumType 4
Operating Freq.13.56Mhz
Data Trans. RateUp to 848 kbit/s
Input Capacitance50 pF
Fast read-
Data retention (years)50
Write endurance (cycles)200000
StandardISO/IEC 14443 A
Release date2019

Compare the NTAG424 to other chips

NFC & QR Code Management
©Copyright 2023 Seritag.
Seritag is a trading name of TabDesk Ltd, a UK Registered company 10474154. VAT Registration Number GB256328005.