Si4730/31-B20
BROADCAST AM/FM RADIO RECEIVER
Features
Worldwide FM band support
EN55020 compliant
(76–108 MHz)
...
Si4730/31-B20
BROADCAST AM/FM RADIO RECEIVER
Features
Worldwide FM band support
EN55020 compliant
(76–108 MHz)
No manual alignment necessary
Worldwide AM band support
Programmable reference clock
(520–1710 kHz)
Volume control
Excellent real-world performance
Programmable soft mute control
Freq synthesizer with integrated VCO RDS/RBDS processor (Si4731 only)
Advanced AM/FM seek tuning
Optional digital audio output (Si4731
Automatic frequency control (AFC)
only)
Automatic gain control (AGC)
2-wire and 3-wire control interface
Integrated LDO
regulator
2.7 to 5.5 V supply voltage
Digital FM stereo decoder
Firmware upgradeable
Programmable de-emphasis
Wide range of ferrite loop sticks and
Adaptive noise suppression
air loop antennas supported
AM/FM digital tuning
3 x 3 x 0.55 mm 20-pin QFN package
Pb-free/RoHS compliant
Applications
Table and portable radios Stereos Mini/micro systems CD/DVD players Portable media players Boom boxes
Cellular handsets Modules Clock radios Mini HiFi Entertainment systems
Description
The Si4730/31 is the first digital CMOS AM/FM radio receiver IC that integrates the complete tuner function from antenna input to audio output.
NCe-d3f1o-r34N-e3w5-DDe6si0gns
GPO1 GPO2/INT GPO3/DCLK
Ordering Information: See page 29.
Pin Assignments
Si4730/31-GM (Top View)
DFS
NC 1 FMI 2 RFGND 3 AMI 4 RST 5
6
20 19 18 17 16
15 DOUT
GND PAD
14 LOUT 13 ROUT
12 ...