Rev. 0.5 10/08 Copyright © 2008 by Silicon Laboratories Si473x-B20
Si473x-B20
BROADCAST MULTI-BAND RADIO RECEIVER
Features
Applications
Si473x Product Selector Guide
ƒÞ FM band support: 76–108 MHz
ƒÞ AM band support: 520–1710 kHz
ƒÞ SW band support: 2.3–21.85 MHz
(Si4734/35)
ƒÞ LW band support: 153–279 kHz
(Si4734/35)
ƒÞ Weather band support: 162.4–
162.55 MHz (Si4736/37/38/39)
ƒÞ 1050 Hz alert tone detection
(Si4736/37/38/39)
ƒÞ Excellent real-world performance
ƒÞ Freq synthesizer with integrated VCO
ƒÞ Advanced seek tuning
ƒÞ Automatic frequency control (AFC)
ƒÞ Automatic gain control (AGC)
ƒÞ Integrated LDO regulator
ƒÞ Digital FM stereo decoder
ƒÞ Programmable de-emphasis
ƒÞ Adaptive noise suppression
ƒÞ AM/FM digital tuning
ƒÞ EN55020 compliant
ƒÞ No manual alignment necessary
ƒÞ Programmable reference clock
ƒÞ Volume control
ƒÞ Programmable soft mute control
ƒÞ RDS/RBDS processor
(Si4731/35/37/39)
ƒÞ Optional digital audio output
(Si4731/35/37/39)
ƒÞ 2-wire control interface
ƒÞ 2.7 to 5.5 V supply voltage
ƒÞ Firmware upgradeable
ƒÞ Wide range of ferrite loop sticks and
air loop antennas supported
ƒÞ 3 x 3 x 0.55 mm 20-pin QFN package
Ć Pb-free/RoHS compliant
ƒÞ Table and portable radios
ƒÞ Audio video receivers
ƒÞ Stereos
ƒÞ Mini/micro systems
ƒÞ CD/DVD players
ƒÞ Portable media players
ƒÞ Cellular handsets
ƒÞ Emergency radios
ƒÞ Clock radios
ƒÞ Modules
ƒÞ Mini HiFi
ƒÞ Boom boxes
Part FM AM RDS SW/LW WB
Si4730 76 – 108 MHz „Ï
Si4731 76 – 108 MHz „Ï „Ï
Si4734 64 – 108 MHz „Ï „Ï
Si4735 64 – 108 MHz „Ï „Ï „Ï
Si4736 76 – 108 MHz „Ï „Ï
Si4737 76 – 108 MHz „Ï „Ï „Ï
Si4738 76 – 108 MHz „Ï
Si4739 76 – 108 MHz „Ï „Ï
Patents Pending
Notes:
1. Place Si473x as close as
possible to antenna jack and
keep the FMI and AMI traces as
short as possible.
2. Contact your local sales
representatives for more
information or to obtain
application notes.
Ordering Information:
See page 18.
Pin Assignments
GND
PAD
1
2
3
20 19 18 17
11
12
13
14
6 7 8 9
4
5
16
10
15
GPO2/INT
VIO
DOUT
LOUT
ROUT
RST GND
NC
AMI
RCLK
SDIO
VDD
FMI
RFGND
GPO3/DCLK
NC
GPO1
DFS
SCLK
SEN
Si473x-GM
(Top View)