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ST enhances dual-interface NFC tags

STMicroelectronics has increased the I2C-interface performance of its latest generation of ST25DV-I2C dynamic NFC-tag ICs, enabling the host system to access the tag’s on-chip EEPROM more quickly and easily.

Writing to the EEPROM, via the I2C interface, is now as fast as standard EEPROM and allows for more flexible use of the tag and has reduced the system bill-of-materials costs. Also, designers can now configure the tag’s I2C address to ensure coexistence with other devices on the bus.

As a Type 5 NFC tag certified by the NFC Forum, the ST25DV-I2C supports contactless interaction with 13.56MHz RFID readers and NFC phones, permitting common use cases such as tap-to-connect pairing with NFC Data Exchange Format (NDEF) messages. The tags also extend wireless capabilities, including support for arbitration that allows more convenient access to data written into the EEPROM through the RF interface.

With this improved performance and flexibility, this latest evolution of the ST25DV-I2C has been designed to boost productivity and efficiency in industrial applications such as smart metering, asset tracking, and logistics, and brings an improved user experiences to medical equipment, smart-home devices and lighting, smart retail labels, and consumer products.

ST’s ST25DV tags are able to address multiple use cases throughout a product’s lifetime, including configuration and product tracking, user features, field maintenance, and end-of-life management.

The new tags support Fast Transfer Mode and energy harvesting. The Fast Transfer Mode leverages a 256-Byte buffer to accelerate handling large files such as a host-system firmware update. Integrated circuitry to control energy harvesting provides an unregulated output voltage for powering external components in battery-less applications.

The ST25DV's dynamic tags are compliant with the NFC Forum Type-5 specification and contain up to 64Kbits of EEPROM, with features including configurable password protection for user memory and an interrupt pin that can be programmed to respond to various events detected at the RF interface.

The evolved ST25DV-I2C tags are available in SO-8, TSSOP-8, and chip-scale packages including 8-lead UFDFPN, 12-lead UFDFPN, and WLCSP-10.

Author
Neil Tyler

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