EM4094- RF Reader ICs, NFC & High Frequency ICs

13.56MHz, compliant ISO 15693 and ISO 14443A&B, Analog Front End IC for RFID Base Station

General Description

The EM4094 is an integrated analog system for 13.56MHz RFID reader system. It is highly versatile so it can be used in different reader systems having sub-carrier frequencies from 212KHz to 848KHz, hence covering ISO 14443 and ISO 15693 standards.
The adaptability is achieved using a 3 wires serial interface to program the system option bits. The transmitter generates 200mW output power into 50 Ohms load and is capable of OOK or ASK modulation.


  • Low Cost reader solution
  • Hand held reader


  • ISO15693 and ISO14443 compatibility
  • Oscillator using 13.56MHz Quartz with selectable transconductance.
  • Antenna driver using OOK or ASK modulation using single antenna driver
  • ASK modulation adjustable in range from 7% to 30%
  • High output power 200mW from 5V supply
  • Antenna short circuit protection
  • Multiple receiver input for high communication reliability
  • AM/PM demodulation with AGC signal amplifier
  • 848KHz BPSK internal decoder (type B)
  • Multiple sub-carrier receiving compatibility (212kHz, 424kHz and 848kHz)
  • Multiple sub-carrier coding compatibility (Manchester, BPSK)
  • Built-in receive low-pass filter cut-off frequency selectable between 400kHz and 1MHz
  • Built-in receive high-pass filter cut-off frequency selectable between 100kHz, 200kHz and 300kHz
  • Selectable receive gain
  • Serial 3 pin interface for option selection
  • Power down mode controlled by the 3 wires SPI
  • Output Power: 100mW (in SO16), 200mW (in SO20)
  • Operation temperature range -40°C to +85°C
EM4094 Fact Sheet (74.16 KB)74.16 KB
EM4094 Data Sheet (799.25 KB)799.25 KB

EM4094 RFID Demo Reader
This 13.56MHz RFID reader is compliant with the ISO14443 type A and B, Sony FelicaTM and the ISO15693 standards supporting all mandatory commands. The demo reader also supports mandatory, optional, custom and proprietary commands of EM's transponder ICs: EM4133, EM4233 and EM4237. The development reader serves as a reference design for reader manufacturers and comes with:

Hardware schematics
PCB Layout (Gerber Files)
Microcontroller source code (easily portable C Language)
PC software (allowing the user to operate with a large selection of RFID tags)

emdb408-fs.pdf (621.29 KB)621.29 KB
Part numberStockMOQPrice
EM4094SO16A+Available on demand460$2.99Order now
EM4094SO16B+Available on demand1'000$2.70Order now
EM4094SO20A+Available on demand3'000$2.70Order now
EM4094SO20B+Available on demand1'000$2.70Order now
EM4094TP16A+Available on demand960$2.79Order now
EM4094TP16B+Available on demand2'500$2.79Order now
EM4094TP20A+Available on demand740$3.09Order now
EM4094TP20B+Available on demand2'500$2.79Order now

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