5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
CLOSE TO VDD
1. Place C487 close to VDD pin.
2. All grounds connect directly to GND plane on PCB.
3. Pins 1 and 20 are no connects, leave floating.
4. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Si47xx 3 mm x 3 mm QFN
Universal Layout Guide.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
5. Pin 2 connects to the FM antenna interface, and pin 4 connects to the AM antenna interface.
6. RFGND should be locally isolated from GND.
7. Place Si4704/05 as close as possible to antenna jack and keep the FMI and AMI traces as short as possible.
8. 4R29,4R30->2K; 4R33->600R; C487->22nF
，
C490->100nF
Y4->32.768; C491,C492->22pF .
9. ESD closed to C400 for Layout pcb when ESD capacitance >1pF .
Optional
5983Y 1.6
HS2X0 AV BOARD - 090905
A3
44Monday, March 29, 2010
Title
Size Document Number Rev
Date: Sheet
of
SCLK
RCLK
FM_ANTENNA
SDIO
RCLK
RCLK
I2S_TUNER_WS
Tuner_Reset
I2S_TUNER_D
I2C_CLK_AV
I2S_TUNER_CL
I2C_DATA_AV
TUNER_GPIO1
TUNER_GPIO2/INT
TUNER_3.3V
DGND
DGND
TUNER_3.3V
DGND
TUNER_3.3V
RFGND
DGND
DGND
DGND
DGNDRFGND
DGND
DGND
DGND
DGND
TUNER_3.3V
TUNER_3.3V
Y401
32.768KHz 12.5PF 20PPM 3.2*1.5MM N/A
1 2
R424
10K N/A
C487
223
C492
22p N/A
4R41 22R
YA
-
+
U402
SN74LVC1G04DBVR N/A
2
3
4
5
1
C490
104
4R30 2K
4R35 0R N/A
4R53
4.7K
4C04
100p N/A
4C05
22uF/10v
ANT401
IF-02P
1
2
3
4
FM
GND
GND
GND
Y403
32.768KHZ
1
34
2
4R39 22R
4R38 0R
R426
30K N/A
R425
100R
R400
30K N/A
ESD409
AVLC18S03015
1 2
C491
22p N/A
L405 270nH
4R40 22R
Si4705-B20-GM
U408
1
2
3
4
9
10
11
15
16
17
13
14
12
18
19
20
5
6
7
8
21
NC1
FMI
RFGND
AMI
RCLK
VIO
VDD
DOUT
DFS
GPIO/DCLK
ROUT/DOUT
LOUT/DFS
GND
GPO2/INT
GPO1
NC2
RST
SEN
SCLK
SDIO
PAD
C400 103
4R33 100R
4R29 2K
4R37 10M N/A
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