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SiLabs Si476x | Radioaficion Ham Radio

SiLabs Si476x


Silicon Labs Si476x AM/FM Radio Receiver and HD Radio TunerSi476x AM/FM Radio Receiver and HD Radio Tuner

Silicon Labs Automotive Tuners Drive Future of Car Radio Technology

High-Performance Si476x Receiver Family Ideal for Multi-Tuner Car Radio Systems with HD Radio Technology

The Si476x receiver family supports worldwide FM and AM radio reception. Additional variants support NOAA Weatherband reception, shortwave, and longwave frequencies for additional radio band support.

The Si476x incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS) including all required symbol decoding, block synchronization, error detection and error correction functions.


  • Worldwide FM band support (64–108 MHz)
  • Worldwide AM (MW) band support (520–1710 kHz)
  • AM/FM HD-R support for North America (Si4761/3/5/7 only)
  • SW band (2.3–30 MHz) and LW (153–288 kHz) band support (Si4762/63/66/67 only)
  • NOAA weatherband support (162.4–162.55 MHz) (Si4763/67 only)
  • FM MPX output
  • Digital audio output (I2S)
  • Digital Zero-IF I/Q output (I2S) (Si4761/63/65/67/69 only)
  • Smallest layout, lowest BOM and no manual alignment
  • Phase diversity dual tuner reception (Si4764/65/66/67 only)
  • FM multi-path channel equalizer
  • Dynamic AM and FM channel bandwidth control
  • Configurable AM and FM noise blanking
  • Configurable FM stereo-mono blend
  • Configurable AM and FM soft mute
  • Configurable multi-path detection and mitigation
  • Dynamic FM hi-cut and hi-blend control
  • Configurable AM power line noise suppression
  • Over deviated (>150khz) FM broadcast reception
  • Fast AF (Alternate Frequency) check for European markets
  • Advanced patented RDS/RBDS processor
  • Frequency synthesizer with fully integrated PLL-VCO and crystal oscillator
  • AEC-Q100 qualified, -40 to 85 °C with PPAP support
  • QFN 40, 6 mm x 6 mm x 0.85 mm package
  • Pb-free/RoHS compliant

(NASDAQ: SLAB), a leader in high-performance, analog-intensive, mixed-signal ICs, today introduced the industry’s most advanced automotive tuner IC family designed to deliver the highest RF performance coupled with advanced signal processing while reducing the cost and complexity of car radio systems. Offering superior price/performance for the global car radio market, the new Si476x tuner family provides a best-in-class multiband receiver solution for automotive infotainment head-units and AM/FM car radios from all classes of providers ranging from Tier 1 suppliers to aftermarket car radio makers.

According to J.D. Power and Associates, the global automotive market is expected to exceed 76 million light-vehicle unit shipments this year. The car radio technology deployed in these vehicles is evolving rapidly as innovations in communication technology proliferate in the automotive infotainment market. The basic car radio has been transformed into a sophisticated infotainment system that includes multiple tuners to deliver FM phase diversity reception, receive radio data system (RDS) data for info-navigation systems, support AM/FM HD Radio technology and provide detailed station quality metrics for living lists of broadcast content. These strenuous broadcast performance demands require advanced silicon innovations to enable a superior in-vehicle audio experience.

Silicon Labs developed the Si476x receiver family to address these major automotive industry trends. The Si476x receivers leverage Silicon Labs’ patented digital low-IF technology and combine most of the traditional external bill of materials into a highly integrated, single-chip CMOS solution. The receivers provide unprecedented flexibility, offering a modular architecture that supports scalable multi-tuner designs. The Si476x supports all worldwide broadcast radio bands including AM/FM, college FM, longwave (LW), shortwave (SW), NOAA weather band, unparalleled FM RDS decoding and AM/FM HD Radio reception. iBiquity Digital Corporation, the developer of HD Radio technology, has certified the Si476x family to provide AM/FM HD Radio tuner outputs and reception with compatible HD Radio demodulator ICs.

“The introduction of the Si476x tuner family represents a major new product offering from a world leader in RF products and a global player in the HD Radio market,” said Jeff Jury, chief operating officer of iBiquity. “Automakers are continuing to embrace HD Radio technology, with more than 20 automotive brands to date announcing the technology as a factory-installed infotainment feature. The Si476x family offers a compelling new solution for this market.”


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