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DATA SHEET ? SKY65338-21 TRANSMIT/RECEIVE FRONT-END MODULE
Table 5. SKY65338-21 SPDT Switch Control Logic
Mode
Transmit
Receive
Note :
Logic level 0: 0 V to 0.2 V
Logic level 1: 2.0 V to 5.0 V
V1 Signal (Pin 9)
1
0
V2 Signal (Pin 8)
0
1
Evaluation Board Description
The SKY65338-21 Evaluation Board is used to test the
performance of the SKY65338-21 FEM. The Evaluation Board
schematic diagram is shown in Figure 11. An assembly drawing
for the Evaluation Board is shown in Figure 12 and the layer detail
is provided in Figure 13. The layer detail physical characteristics
are noted in Figure 14. Table 6 provides the Bill of Materials
(BOM) list for Evaluation Board components.
Circuit Design Considerations
The following design considerations are general in nature and
must be followed regadless of final use or configuration:
1. Paths to ground should be made as short as possible.
2. The ground pad of the SKY65338-21 has special electrical
and thermal grounding requirements. This pad is the main
acts as the heat sink, it must shunt as much heat as possible
from the device. Therefore, design the connection to the
ground pad to dissipate the maximum wattage produced by
the circuit board. Multiple vias to the grounding layer are
required.
NOTE: A poor connection between the slug and ground increases
junction temperature (T J ), which reduces the lifetime of the
device.
Package Dimensions
The phone board layout footprint for the SKY65338-21 is shown
in Figure 15. Package dimensions for the 12-pin MCM are shown
in Figure 16, and tape and reel dimensions are provided in
Figure 17.
thermal conduit for heat dissipation. Since the circuit board
9-Header
1
2
3
4
5
6
7
8
9
J2
SMA
12
11
10
50 Ω Transmission
Line
1
TX_IN
V1
9
Switch Logic
2
GND
SKY65338
V2
8
Switch Logic
J3
SMA
50 Ω Transmission
Line
3
RX_OUT
ANT
7
50 Ω Transmission
Line
J4
SMA
4
5
6
S1348
Figure 11. SKY65338-21 Evaluation Board Schematic
Skyworks Solutions, Inc. ? Phone [781] 376-3000 ? Fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com
6
October 13, 2009 ? Skyworks Proprietary Information ? Products and Product Information are Subject to Change Without Notice ? 201004C
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功能描述:射频前端 450-470MHz PAE 34% Psat 29.1 dBm
RoHS:否 制造商:Skyworks Solutions, Inc. 类型: 工作频率:2.4 GHz, 5 GHz 最大数据速率:54 Mbps 噪声系数: 工作电源电压:3.3 V 电源电流:180 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-32
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RoHS:否 制造商:Skyworks Solutions, Inc. 类型: 工作频率:2.4 GHz, 5 GHz 最大数据速率:54 Mbps 噪声系数: 工作电源电压:3.3 V 电源电流:180 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-32
SKY65344-21
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RoHS:否 制造商:Skyworks Solutions, Inc. 类型: 工作频率:2.4 GHz, 5 GHz 最大数据速率:54 Mbps 噪声系数: 工作电源电压:3.3 V 电源电流:180 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-32
SKY65346-11
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SKY65352-11
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