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The NF4 chip is an NFC Forum Type 4 dual interface tag IC. It is intended for use in applications requiring a dual communication interface, contact and contactless, read/write memory with optionally security features to protect data privacy and integrity.
The contactless interface is based on ISO/IEC14443 standard Type A. The chip supports all protocol layers. The robust and sensitive contactless interface permits complete transactions at minimum operating field strength of 0.7A/m. The NFC reader device can select any communication data rates from 106k bps up to 848k bps.
The 2-wires serial contact interface is composed by a bi-directional IO data line and a slave clock (1 clock per bit).
The chip security features are based on AES-128 cryptography. In order to enforce the confidentiality level of the data exchanged between the reader and the NF4 chip, the contactless communication can be optionally encrypted including also a Message Authentication Code (MAC). The chip maximizes flexibility in terms of access conditions to memory data.
The IC supports all the ISO/IEC14443 -3/-4 commands and a transport layer based on an optimized ISO/IEC 7816-4 command set.
Each NF4 chip has a 7 byte unique serial number, programmed at wafer level, which guaranties the uniqueness of each device.
An optional Random ID feature according to ISO/IEC14443-3 can be enabled in the application or during the product personalization.
In case of a passive application, without battery assistance, the NF4 chip offers energy harvesting capabilities in order to power supply an external device like a microcontroller or a digital sensor.
Support & Tools
The EM NF4 Development Board is designed to offer the maximum flexibility to R&D engineers who would like to profit from all the benefits and all the functionalities provided by the NF4 dual interface NFC memory chip.