Si4840/44-A10
BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW
RADIO RECEIVER
Features
Worldwide FM band support Minimal BOM components with no
(64109 MHz) manual alignment
Worldwide AM band support Excellent real-world performance
(5041750 kHz) Automatic frequency control (AFC)
SW band support (Si4844 only) EN55020 compliant
(2.328.5 MHz)
Two AAA batteries with 2.0 to 3.6 V
Selectable support for all AM/FM
supply voltage (T = 25 C)
regional bands
Wide range of ferrite loop sticks and
2-wire control interface
air loop antenna support
Ordering Information:
Mono/Stereo and valid station
24-pin SSOP package
See page 20.
indicator
RoHS compliant
Digital volume support
Bass/Treble support
Pin Assignments
Applications
Table and portable radios Modules for consumer electronics
Si4840/44-A10 (SSOP)
Stereos Entertainment systems
Mini/micro systems Toys, lamps, and any application 1 24
LNA_EN LOUT
needing an AM/FM radio
Boom boxes 2 23 ROUT
IRQ
Mini HiFi 3 22
Clock radios TUNE1 DBYP
iPhone docking 4 21 VDD2
TUNE2
5 20
BAND VDD1
Description
6 19 XTALI
NC
7 18
NC XTALO
The Si4840/44 is the first analog-tuned digital-display digital CMOS AM/FM/SW
8 17
FMI SCLK
radio receiver IC that integrates the complete receiver function from antenna input
9 16
RFGND SDIO
2
to audio output. Working with Host MCU (I C-compatible 2-wire control interface),
10 15 RST
NC
frequencies, and stereo/mono information can be displayed on LCD, while the
11 14
NC GND
analog-tune features are kept. Leveraging Silicon Laboratories' proven and
12 13
GND
AMI
patented digital low intermediate frequency (low-IF) receiver architecture, the
Si4840/44 deliver superior RF performance and interference rejection. The
superior control algorithm integrated in Si4840/44 provides easy and reliable
This product, its features, and/or its
control interface while eliminating all the manual tuned external components used
architecture is covered by one or more of
in traditional solution.
the following patents, as well as other
Functional Block Diagram patents, pending and issued, both
foreign and domestic: 7,127,217;
7,272,373; 7,272,375; 7,321,324;
Si484x
Si4830/34
7,355,476; 7,426,376; 7,471,940;
ADC DAC
AMI LOUT
7,339,503; 7,339,504.
AM
LNA
DSP
RFGND
ANT
ADC DAC
ROUT
FM
AGC
ANT
FMI
0/90
TUNE1/2
ADC
AFC
XTALI CONTROL INTERFACE BAND
2.0~3.6V
VDD1/2
XTAL
REG
OSC
Rev.1.0 8/11 Copyright 2011 by Silicon Laboratories Si4840/44-A10
IRQ
SCLK
SDIO
RSTSi4840/44-A10
2 Rev.1.0