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
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eDesignSuite
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: 
Input geometry and substrate properties Get antenna impedance 
Enter forward and reverse link characteristics The tool returns link budget estimate 
Enter antenna parameter and matching target Select the topology of the matching network The tool returns component values for the desired design targets
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 Power Supply Design Tool
Power Supply Design Tool
Active Filters
Comparators
Current Sensing
LED Lighting Design Tool
Rectifier Diodes Simulator
STPOWER Studio
AC Switches Simulator
Power Supply Design Tool
TVS Simulator
Power Supply Design Tool
LED Lighting Design Tool
NFC Tuning Circuit
NFC Inductance