Si476x

The Si476x radio receiver family employs 100% RF CMOS technology to bring outstanding receiver performance to the automotive infotainment industry, which demands high performance and quality.

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.

All odd-numbered variants in the family support AM/FM HD Radio channel reception with digital (I²S) baseband I/Q outputs for interface to a HD Radio demodulator/decoder. Higher numbered variants in the family support dual antenna phase diversity reception.

Key Requirements for Multi-Tuner Automotive Radio Designs

Features

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

Applications

OEM car radio systems
OEM automotive infotainment systems
Aftermarket car radio systems
OEM car PND docking system

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Data Short (1)

Document Name	Description	Version	Last Updated
Si476x_short.pdf	Si476x Data Short	11.10.11	11/14/2011

Product Matrix

Part Number	Available Documents	Description	Dig I/O	RDS Support
Si4760	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4761	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4762	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4763	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4764	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4765	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4766	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes
Si4767	Data Short	Multi-band receiver/HD Radio tuner with RDS, automotive qualified AEC-Q100	Yes	Yes

Training & Resources

Featured Videos

Class D Audio Driver and Reference Design

Si4830 Wheel-Tuned Digital CMOS AM/FM Radio Receiver IC

Featured Web Utilities

Class D Audio Sound Quality Demo

The Class D audio driver interactive demonstration allows you to see the sound quality performance of the Si824x Class D audio driver over the audible spectrum. The demo shows the total harmonic distortion + noise (THD + N) ratio, a universal measure of sound quality for audio amplifiers.

Featured White Papers

Key Requirements for Multi-Tuner Automotive Radio Designs

Automotive OEMs and Tier 1 suppliers understand that consumers expect a superior in-vehicle audio experience and are responding by designing sophisticated infotainment systems. The radio components used in today's vehicles need to be cost-effective while meeting rigorous automotive levels of performance. With the advent of multi-tuner automotive infotainment systems, car radio developers must now consider a wide range of performance requirements and new technologies in their designs.

Designing Wheel-Tuned, Digital-Display Radios with Next-Generation Radio ICs

As a growing number of portable applications such as mobile phones and portable media players integrate the FM radio function, there’s a misconception that traditional radios are no longer needed. In reality, wheel-tuned radios have remained immensely popular. This article will discuss how to design a mid-level wheel-tuned radio with an LCD to display frequencies, and it will explore the practical considerations in selecting audio ICs and display drivers, as well as how to leverage these technologies to deliver the best end-user radio tuning experience. Available in English and Simplified Chinese.

Featured Tutorials and Presentations

Multiband Receiver Family Overview

The Si473x is the industry's first fully integrated, 100% CMOS AM/FM/shortwave/longwave/weather bandradio receiver IC. This family of radio receiverICs provides the space savings and low power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM solutions.

Introducing High-Performance FM RDS Data Receiver ICs

The Si4749/06 are 100% CMOS receiver ICs, offering full receive functionality from antenna to RDS/RBDS data for use in the automotive and portable navigation markets. The Si4749/06 is an ideal RDS/RBDS data receiver for Traffic Message Channel (TMC) and Open Data Applications (ODA) applications frequently used in conjunction with GPS functionality.

Audio/Video

Title Content
Si476x AM/FM Radio Receiver and HD Radio Tuner

Features

Applications