em | echo- NFC & High Frequency ICs, EPC and UHF ICs

Dual Frequency RAINFC Transponder IC

General Description

em|echo (also known by its order code EM4423) belongs to the latest generation of EM Microelectronic radio-frequency identification (RFID) devices, bringing innovative features to the NFC and EPCTM worlds. The chip combines RAIN RFID and NFC functionalities on one single die, the RAIN RFID ultra-high frequency technology used for long-range application purposes and the NFC used to exchange data in a proximity range. Both protocols may share a common unique ID.

Targeted applications and market segments include retail, product authentication or smart NFC posters.

A tag or label based on the em|echo provides multiple benefits and usages via the EPC communication interface like stock inventory, product returns, and data privacy. The same tag or label also enables new marketing services like product information or loyalty programs using an NFC enabled smartphone.

The chip is a dual frequency device supporting ISO/IEC14443 Type A, NFC ForumTM Type 2 specifications, ISO/IEC18000-63 and EPC Gen2 V2. Additional features have been added to provide chip privacy. For the NFC interface, the smart counter increments its value each time the NFC message has been read by the end-user.

Each chip is manufactured with a 96-bit unalterable unique identifier (UID) to ensure full traceability. The same UID number is used by both RF protocols. During an ISO/IEC14443 anti-collision procedure, the 7 bytes which are part of the 96-bit are sent back by the transponder IC.

em|echo offers two non-volatile memories which are accessible by both RF air interfaces. The two memories are segmented to implement multiple applications.

em|echo supports the optional BlockWrite command, enabling the fast encoding of a 96-bit EPC. em|echo also supports the optional Untraceable command to hide portions of memory of the tag or label.


  • Product Identification
  • Customer engagement, coupons, loyalty programs
  • Inventory and supply chain management
  • Asset control
  • Single tap quick re-odrering 

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  • Dual Frequency 1-step inlay manufacturing
  • Common unique ID
  • Shared memory
  • Minimum 100k write cycles endurance
  • Minimum 10 years data retention
  • Extended temperature range (-40°C to +85°C)
  • Sawn wafers, 3/6-mil thickness, gold bumps
  • NFC Interface
    • ISO/IEC 14443A -3 compliant tag
    • NFC Forum Type 2 compatible
    • Enables NDEF data structure configurations
    • Communication baud rates at 106kbps
    • Anti-tearing support for NFC capability container (CC) and Static/Dynamic lock bytes
    • ACCESS counter increased at first reading
    • Optional limit of unsuccessful LOGINs
    • Optional security timeout for unsuccessful LOGINs
    • Optional control of EPC privacy features
    • UHF power detection
    • 50pF NFC on-chip resonant capacitor 
  • EPC Interface
    • ISO/IEC 18000-63 compliant
    • EPC Gen2 V2 certified
      • Alteration EAS certified
      • Tag Alteration (Core) certified
    • 32-bit Access and Kill passwords
    • Read sensitivity up to -18dBm with a dipole antenna
    • Write sensitivity up to -13dBm with a dipole antenna
    • Fast writing using the BlockWrite command
    • Block permalock for USER memory
    • NFC field detection
    • NFC ACCESS counter
  • Memory
    • 32-bit Shared unique ID included in:
      • 7 bytes UID (NFC)
      • 96-bit TID (EPC)
    • 2080-bit or 1984-bit User memory
      • 1920 bit contiguous user data from NFC
      • 160 or 64 bit USER contiguous data from EPC
    • 128-bit or 224-bit UII/EPC encodings
    • 1 step encoding possible from NFC or EPC interface. 
em|echo Factsheet220.79 KB
em|echo Datasheet1.46 MB
em|echo memory simulator9.22 MB