The SR series offers a short-range RFID interface compatible with ISO 14443 Type-B RFID readers. It can be used in a wide variety of applications, including mass transit, asset tracking and industrial automation.

  • ISO 14443 Type-B tag RF interface
  • 64-bit unique identifier (UID)
  • 2 count-down binary counters with automated anti-tearing protection
  • 40 years data retention
  • 1 million read/write cycles
  • EEPROM memory density from 512 bits to 4 Kbits
  • 32-bit password protection optional


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