NF4- NFC & High Frequency ICs

Dual interface NFC Forum Type 4 tag IC

General Description

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.


  • Healthcare market segments
  • NFC pairing
  • Smart and Secure metering
  • Product personalization and diagnostic tool
  • Smart Sensors – Data logger
  • NFC tags with large memory capabilities
  • Consumer
  • Home appliance
  • Automation, Industrial



  • NFC Forum Type 4 compliant tag IC
  • Supports ISO/IEC14443 Type A
  • RF data rates from 106kbps up to 848kbps
  • 8kB, 32kB or 64kB user’s data NVM memory
  • 7 Byte Unique Identifier number (UID)
  • Optional Random ID to enhance security and product privacy
  • Chip security based on AES-128 crypto algorithm
  • Optional Secure Messaging (SM). Encryption of the RF communication channel
  • Optional Message Authentication Code (MAC)
  • 2-wires serial interface (clock and data).
  • Serial interface data rates up to 1MHz
  • RF Busy line indicating presence of an on-going contactless communication
  • RF field detector available on VPOS
  • Energy harvesting capability – extracting energy from the electromagnetic field (up to 5mA – 3.6V)
  • Possibility to create proprietary application files
  • ISO/IEC7816-4 optimized command set
  • On-chip resonant capacitor: 14pF
  • Optimized resonant frequency of 14.5MHz
  • Minimum operating field strength of 0.7A/m
  • -25°C to +85°C temperature range
  • Available in SO8 package or wafer form


NF4 Fact Sheet (424.75 KB)424.75 KB
To request full Data Sheet, please complete & return this NDA (68.43 KB)68.43 KB

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.


EMDB415 NF4 Development Board Fact Sheet (1.01 MB)1.01 MB
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