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PDF Si4844-B20 Data sheet ( Hoja de datos )
| Número de pieza | Si4844-B20 | |
| Descripción | BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER | |
| Fabricantes | Silicon Laboratories | |
| Logotipo |  |
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Si4844-B20
BROADCAST ANALOG TUNING DIGITAL DISPLAY
AM/FM/SW RADIO RECEIVER
Features
Worldwide FM band support
(64–109 MHz)
Worldwide AM band support
(504–1750 kHz)
SW band support
(2.3–28.5 MHz)
Selectable support for all AM/FM
regional bands
Enhance FM/SW band coverage
2-wire control interface
Mono/Stereo and valid station
indicator
Digital volume support
Applications
Table and portable radios
Stereos
Mini/micro systems
Boom boxes
Clock radios
Description
Bass/Treble support
Minimal BOM components with no
manual alignment
Excellent real-world performance
China TV channels audio carrier
reception in FM band
EN55020 compliant
Two AAA batteries with 2.0 to 3.6 V
supply voltage
Wide range of ferrite loop sticks and
air loop antenna support
16-pin SSOP package
RoHS compliant
Modules for consumer electronics
Entertainment systems
Toys, lamps, and any application
needing an AM/FM/SW radio
Mini HiFi
iPhone docking
The Si4844-B is the analog-tuned digital-display digital CMOS AM/FM/SW radio
receiver IC that integrates the complete receiver function from antenna input to audio
output. Working with the host MCU (I2C-compatible 2-wire control interface),
frequencies and stereo/mono information can be displayed on LCD while the analog-
tune features are kept. Si4844-B is pin-to-pin compatible with the current Si484x-A
tuner. Sharing all the advanced features of the Si484x-A, Si4844-B can support a wider
range of FM and SW bands. The Si4844-B also supports China TV channels audio
reception in FM band. The superior control algorithm integrated in the Si4844-B
provides a easy and reliable control interface while eliminating all the manual-tuned
external components used in a traditional solution.
Functional Block Diagram
AM
ANT
FM
ANT
AMI
RFGND
FMI
XTALI
2.0~3.6V VDD1/2
LNA
AGC
0/90
AFC
REG
XTAL
OSC
SiS48i43804/43-4B
ADC DAC
DSP
ADC DAC
LOUT
ROUT
CONTROL INTERFACE
ADC
TUNE1/2
BAND
Ordering Information:
See page 21.
Pin Assignments
Si4844-B20 (SSOP)
LNA_EN
IRQ
TUNE1
TUNE2
BAND
NC
NC
FMI
RFGND
NC
NC
AMI
1
2
3
4
5
6
7
8
9
10
11
12
24 LOUT
23 ROUT
22 DBYP
21 VDD2
20 VDD1
19 XTALI
18 XTALO
17 SCLK
16 SDIO
15 RST
14 GND
13 GND
This product, its features, and/or its
architecture is covered by one or more of
the following patents, as well as other
patents, pending and issued, both
foreign and domestic: 7,127,217;
7,272,373; 7,272,375; 7,321,324;
7,355,476; 7,426,376; 7,471,940;
7,339,503; 7,339,504.
Rev. 1.0 5/13
Copyright © 2013 by Silicon Laboratories
Si4844-B20
1 page  
Si4844-B20
Table 3. Reset Timing Characteristics
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Symbol Min Typ
RSTB Pulse Width
tPRST 100 —
2-wire bus idle time after RSTB rises
tSDIO
100 —
2-wire bus idle time before RSTB rises, and VDD valid
time before RSTB rises
tSRST 100 —
RSTB low time before VDD becomes invalid
tRRST 0 —
Notes:
1. RSTB must be held low for at least 100 µs after the voltage supply has been ramped up.
2. RSTB needs to be asserted (pulled low) prior to the supply voltage being ramped down.
Max
—
—
—
—
Unit
µs
µs
µs
µs
VDD
RSTB
tSRST
tSDIO
tPRST
tSDIO
tRRST
SCLK
SDIO
POWER_UP
Normal
Operation
Figure 1. Reset Timing
POWER_UP
Normal
Operation
Rev. 1.0
5
5 Page 
Si4844-B20
Table 9. Absolute Maximum Ratings 1, 2
Parameter
Symbol
Value
Unit
Supply Voltage
Input Current3
Operating Temperature
Storage Temperature
RF Input Level4
VDD
IIN
TOP
TSTG
–0.5 to 5.8
10
–40 to 95
–55 to 150
0.4
V
mA
C
C
VPK
Notes:
1. Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation
should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure beyond
recommended operating conditions for extended periods may affect device reliability.
2. The Si4844-B devices are high-performance RF integrated circuits with certain pins having an ESD rating of < 2kV
HBM. Handling and assembly of these devices should only be done at ESD-protected workstations.
3. For input pins RST, SDIO, SCLK, XTALO, XTALI, BAND, TUNE2, TUNE1, IRQ, and LNA_EN.
4. At RF input pins, FMI, and AMI.
Rev. 1.0
11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet Si4844-B20.PDF ] | |
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