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HIGHLY INTEGRATED
EASIEST TO IMPLEMENT
Broadcast Audio Product Family
Broadcast Audio Solutions
RDS and RBDS Support
The Si47xx family includes a series of solutions that incorporates a digital processor for the European
Radio Data System (RDS) and the US Radio Broadcast Data System (RBDS) including all required
symbol decoding, block synchronization, error detection, and correction functions. Using this feature,
these products enable data such as station identification, artist name, and song title to be transmitted
to and displayed on any RDS/RBDS receiver. The Si4749/06 incorporate a high-performance
RDS/RBDS decoder based on patented methodologies, and deliver excellent RDS/RBDS sensitivity
performance, synchronization to RDS/RBDS at high BLER levels and RDS/RBDS data decoding with
superior decoder reliability, making them ideal for performance-intensive Traffic Message Channel
(TMC) applications in navigation devices.
Single PCB for All Broadcast Audio Designs
Footprint Compatible
The Si47xx family requires only two external components and offers
many footprint compatible multi-band receivers.
Si4702/03
• FM receiver
• RDS (Si4703)
Si4710/11/12/13
• FM transmitter
• RDS (Si4711/13)
• Receive Power Scan (RPS)
(Si4712/13)
Si4730/31
• AM/FM receiver
• RDS (Si4731)
Si4734/35
• AM/FM/shortwave/longwave
receiver
• RDS (Si4735)
Si4707/36/37/38/39
• AM/FM/weather band
receiver
• RDS (Si4737/39)
• SAME (Si4707- WB only)
Si4720/21
• FM transceiver
• Receive Power Scan (RPS)
• RDS (Si4721)
• Requires no external antenna
Si4704/05/06
• FM receiver
• RDS (Si4705/06)
• Enhanced RDS (Si4706)
• Requires no external antenna
Highest Level of Integration
The Si47xx products are the first fully integrated
broadcast audio ICs. These solutions require
only two external components and 15 mm
2
or
less of board space in contrast to dozens of
external components and as much as five times
the amount of board space for competing
products. The high level of integration, small
footprint and low power consumption enable
the integration of multi-band receivers, FM
receivers, FM transmitters, FM transceivers,
or data receivers into any consumer device
such as mobile phones, MP3 accessories,
media players, and navigation devices.
Best-in-Class Performance
The Si47xx family’s excellent selectivity
and sensitivity improve user experience
and result in reduced interference and
increased reception. Its advanced digital
audio processing delivers optimum sound
quality superior to other solutions even in the
presence of variable signal conditions, and
its digital architecture enables performance
that is unmatched compared to standard
analog solutions. With advanced AM and FM
seek algorithms and software programmable
audio flexibility, the Si47xx family provides an
unmatched level of performance.
Easiest to Design and Manufacture
The Si47xx family is delivered as a fully tested
system requiring no factory alignment. Its
simple hardware design reduces development
time, unlike other solutions that require
dozens of components limiting production
flow and adding performance variability
across products. Evaluation and design is
easy with a full reference board including
schematics and layout files and a robust
development graphical user interface (GUI).
These solutions also accept a wide range
of antenna inputs from headphone cables
to ultra-small ferrites and integrated tuned
loops.
Part Number Description RDS Support Dig I/O
Si4702/03 FM radio receivers Si4703 —
Si4704
1
/05
1
FM radio receiver, no external antenna required Si4705 Si4705
Si4706 Enhanced FM RDS/TMC radio receiver, no external antenna required Si4706 Si4706
Si4707 Weather band radio receiver with SAME decoder — —
Si4708/09 World’s smallest FM tuner with RDS Si4709 —
Si4710/11 FM radio transmitter with RDS and digital audio compression Si4711 Si4711
Si4712/13 FM radio transmitter with RDS, digital audio compression and RPS Si4713 Si4713
Si4720/21 FM radio transceivers with digital audio compression Si4721 Si4721
Si4730/31 AM/FM radio receivers Si4731 Si4731
Si4734
1
/35
1
AM/FM/shortwave/longwave radio receivers Si4735 Si4735
Si4736/37 AM/FM/weather band radio receivers Si4737 Si4737
2
Si4738/39 FM/weather band radio receivers Si4739 Si4739
2
Si4749 Enhanced FM RDS/TMC radio receiver, automotive qualified Si4749 —
Actual size
2
AM/FM only
1
Extended FM tuning range 64-108 MHz
Silicon Laboratories Inc.
400 West Cesar Chavez • Austin, TX 78701
Toll Free: (877) 444-3032
Email: FMinfo@silabs.com
Web site: www.silabs.com
Silicon Laboratories and the Silicon Labs logo are trademarks of Silicon Laboratories
Inc. All other product or service names are the property of their respective owners.
CI, 5000, April 08 , Rev B SOL-AUD-2008B