MIKROE-3659 NFC Tag 4 Click Mikroe MIKROE-3659 NFC Tag 4 Click features the STMicroelectronics ST25DV16K, a compact NFC/RFID Tag IC. The ST25DV16K offers fast data transfer between I2C and RF interfaces, a half-duplex 256-byte dedicated buffer, energy harvesting, and data protection features. The Mikroe NFC Tag 4 Click also has an onboard trace antenna, ensuring that no external components are required to use this Click board.