ST25TB series NFC tags

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The ST25TB series of RFID tags are compatible with the ISO14443 standard, so support applications such as public transport and event ticketing. They provide state-of-the-art RF performance and include a counter able to count more than 4 billion events.

  • ISO14443-2 Type B with Proprietary Protocol
  • 512-, 2K-, and 4K-bit EEPROM with write protect
  • Two 32-bit counters with anti-tearing feature
  • OTP bytes with conditional erased features 


eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

NFC/RFID Calculators

Choose design tool:

NFC Inductance

Input geometry and substrate properties
Get antenna impedance

UHF Link Budget

Enter forward and reverse link characteristics
The tool returns link budget estimate

NFC Tuning Circuit

Enter antenna parameter and matching target
Select the topology of the matching network
The tool returns component values for the desired design targets