EM4095- RF Reader ICs, LF Animal & Access ICs

125KHz-134KHz, Read/Write analog front end for RFID basestation

General Description

The EM4095 (previously named P4095) chip is a CMOS integrated transceiver circuit intended for use in an RFID basestation to perform the following functions:

  • antenna driving with carrier frequency
  • AM modulation of the field for writable transponder
  • AM demodulation of the antenna signal modulation induced by the transponder
  • communicate with a microprocessor via simple interface


  • Car immobiliser
  • Hand held reader
  • Low cost reader



  • Integrated PLL system to achieve self adaptive carrier frequency to antenna resonant frequency
  • No external quartz required
  • 100 to 150kHz carrier frequency range
  • Direct antenna driving using bridge drivers
  • Data transmission by OOK (100% Amplitude Modulation) using bridge driver
  • Externally adjustable modulation index
  • Multiple transponder protocol compatibility(Ex: EM4102, EM4200, EM4450 and EM4205/EM4305)
  • Sleep mode consumption 1µA
  • USB compatible power supply range
  • -40 to +85°C temperature range
  • Small outline plastic package SO16

EM4095 Hardware Environment Calculation Tool
Use this excel spreadsheet to calculate the components needed for use in conjunction with EM4095

EM4095 RFID Demo Reader
This 125kHz RFID reader supports the majority of EM Microelectronic's low freqency transponder ICs. 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)
export OrCAD

EM4095 Hardware Environment Calculation Tool (192.5 KB)192.5 KB
export OrCAD (101.38 KB)101.38 KB
Part numberStockMOQPrice
EM4095HMSO16A+Available on demand480$2.90Order now
EM4095HMSO16B+Available2'500$2.33Order now

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