Si4734/35 AM/FM/SW/LW Radio Receivers

The Silicon Labs Si4734/35 ICs are the industry's first fully integrated, 100% CMOS AM/FM/SW/LW radio receivers.  

Our Si4734/35 AM/FM/SW/LW radio receivers provide the space savings and low-power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM/SW/LW solutions. 

Offering unmatched integration and PCB space savings, the Si4734/35 requires minimal external components and less than 20 mm² of board area, excluding the antenna inputs. 




  • Worldwide FM band support (64–108 MHz)
  • Worldwide AM band support (520–1710 kHz)
  • Shortwave band support (2.3–21.85 MHz)
  • Longwave band support (153–279 KHz)
  • Digital FM stereo decoder
  • AM/FM/SW/LW digital tuning

Si4734/35 Product Matrix

Part Number Data Sheet Description Tuning Method Display Method Mono/Stereo RDS FM AM SW LW WB TX EN55020
FM/AM/SW/LW Receiver Digital Digital Stereo No Yes Yes Yes Yes No No Yes
FM/AM/SW/LW Receiver w RDS Digital Digital Stereo Yes Yes Yes Yes Yes No No Yes
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