STMicroelectronics — ST25DV-I2C Dynamic Tag ICs

The STMicroelectronics ST25DV-I2C series of dynamic tag ICs have dual NFC/RFID and I2C bus interfaces, to provide for untethered interaction between an external NFC smartphone or reader, and a host device’s microcontroller or applications processor.

Compliant with the ISO 15693 communication standard, the ST25DV-I2C series supports data exchange over an extended wireless communication range at a frequency of 13.56 MHz. This capability may be used, for instance, for in-the-box programming of electronic equipment at the point of production. Fast Transfer Mode operation, enabled by a half-duplex 256-byte buffer, also enables software updates in the field via any NFC-enabled mobile device. The ST25DV-I2C dynamic tags are compatible with any existing RFID infrastructure, with no additional investment required.

The ST25DV-I2C series, which is based on the ISO 15693 standard, complies with the specifications for NFC Forum Type 5 tags. Multiple 64-bit passwords offer enhanced data-protection capabilities. Mutual authentication between the host and the reader or smartphone can be implemented by coupling the ST25DV-I2C with an STM32 microcontroller that supports the secure boot/secure firmware update (SBSFU) service.

The ST25DV-I2C is suitable for use in industrial applications, offering high write-cycle endurance of 1 million cycles at 25°C, and 40-year data retention.

The latest evolution of the ST25DV-I2C series, the ST25DV-I2C EVO, offers extra performance and flexibility to boost productivity and efficiency. The ST25DV-I2C EVO IC lets the host system access the tag’s on-chip EEPROM memory more quickly and easily via the I2C interface.

The available parts are the ST25DV04KC, providing 4 kbits of EEPROM,  the ST25DV16KC with 16 kbits, and the ST25DV64KC offering 64 kbits. The devices are available in a choice of five packages.