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Silicon Laboratories
Silicon Laboratories

Si4737-B20 Datasheet Preview

Si4737-B20 Datasheet

BROADCAST WEATHER BAND RADIO RECEIVER

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Si4737-B20 pdf
Si4736/37/38/39-B20
BROADCAST WEATHER BAND RADIO RECEIVER
Features
NOAA weather band support (162.4– No manual alignment necessary
162.55 MHz)
Programmable reference clock
Worldwide FM band support
Volume control
(76–108 MHz)
Programmable soft mute control
Worldwide AM band support
Programmable de-emphasis
(520–1710 kHz) (Si4736/37 only)
RDS/RBDS processor (Si4737/39
1050 Hz alert tone detection
only)
Excellent real-world performance
Optional digital audio output (Si47/39
Freq synthesizer with integrated VCO only)
Advanced AM/FM seek tuning
Optional digital audio output
Automatic frequency control (AFC)
(Si4737/39 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
Adaptive noise suppression
3 x 3 x 0.55 mm 20-pin QFN package
AM/FM/WB digital tuning
Pb-free/RoHS compliant
Ordering Information:
See page 30.
Pin Assignments
Si4736/37/38/39-GM
(Top View)
Applications
Emergency radios
Table and portable radios
Stereos
Mini/micro systems
Portable media players
Boom boxes
Cellular handsets
Modules
Clock radios
Mini HiFi
Description
The Si4736/37/38/39 is the first digital CMOS AM/FM/WB radio receiver IC that
integrates the complete tuner function from antenna input to audio output.
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 GND
7 8 9 10 11 VDD
Functional Block Diagram
AMI
AM
ANT RFGND
FM/
WB
ANT FMI
2.7– 5.5 V
VDD
GND
LNA
AGC
LNA
AGC
LDO
Si473x
RDS
(Si4737/
39)
LOW-IF
DIGITAL
AUDIO
(Si4737/
39)
DOUT
DFS
GPO/DCLK
ADC DAC
DSP
ADC DAC
ROUT
LOUT
AFC
CONTROL
INTERFACE
VIO
1.5–3.6 V
Patents pending
Notes:
1. To ensure proper operation and
receiver performance, follow the
guidelines in “AN383: Universal
Antenna Selection and Layout
Guidelines.” Silicon Laboratories will
evaluate schematics and layouts for
qualified customers.
2. Place Si4736/37/38/39 as close as
possible to antenna jack and keep
the FMI and AMI traces as short as
possible.
Rev. 1.0 4/08
Copyright © 2008 by Silicon Laboratories
Si4736/37/38/39-B20



Silicon Laboratories
Silicon Laboratories

Si4737-B20 Datasheet Preview

Si4737-B20 Datasheet

BROADCAST WEATHER BAND RADIO RECEIVER

No Preview Available !

Si4737-B20 pdf
Si4736/37/38/39-B20
2 Rev. 1.0


Part Number Si4737-B20
Description BROADCAST WEATHER BAND RADIO RECEIVER
Maker Silicon Laboratories
Total Page 30 Pages
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