PRELIMINARY DATA SHEET
IFA+
Applications
2G/3G base station transceivers:
GSM/EDGE, CDMA, UMTS/WCDMA
Land mobile radio
High performance radio links
IFA–
SKY73083-21: 1700 – 2200 MHz High Gain and Linearity
Diversity Downconversion Mixer
RFA
LO1
Features
LO_SEL
Operating frequency range: 1700 to 2200 MHz
Specifically optimized for the 1800 MHz band
(1710 to 1785 MHz)
IF frequency range: 50 to 500 MHz
Conversion gain: 9 dB
Input IP3: +26 dBm
Output IP3: +35 dBm
Noise Figure: 8.9 dB
Power-down mode
Integrated LO drivers
Integrated low loss RF baluns
High linearity IF amplifiers
On-chip SPDT LO switch (greater than 40 dB LO-to-LO isolation)
Small, MCM (36-pin, 6 x 6 mm) package (MSL3, 260 C per
JEDEC J-STD-020)
(Switch Enable)
LO2
RFB
PWRDN
IFB+
IFB–
S2027
Figure 1. SKY73083-21 Block Diagram
Description
The SKY73083-21 is a fully integrated diversity mixer that
includes Local Oscillator (LO) drivers, an LO switch, high linearity
mixers, and large dynamic range Intermediate Frequency (IF)
amplifiers. Low loss RF baluns have also been included to reduce
design complications and lower system cost.
The SKY73083-21 operates in a wide RF input frequency range of
1700 to 2200 MHz but the device is optimized for the best
performance in the 1710 to 1785 MHz frequency range.
The SKY73083-21 features an input IP3 of +26 dBm and a Noise
Figure (NF) of 8.9 dB, making the device an ideal solution for high
dynamic range systems such as 2G/3G base station receivers.
The LO switch provides more than 40 dB of isolation between LO
inputs and supports the switching time required for GSM/EDGE
base stations.
The SKY73083-21 is manufactured using a robust silicon BiCMOS
process and has been designed for optimum long-term reliability.
The SKY73083-21 diversity downconversion mixer is provided in
a compact, 36-pin Multi-Chip Module (MCM). A functional block
diagram is shown in Figure 1. The pin configuration and package
are shown in Figure 2. Signal pin assignments and functional pin
descriptions are provided in Table 1.
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1
VCC_RFA
N/C
GND
IFA–
IFA+
N/C
VCC_IFA
RIFA
N/C
PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
36
35
34
33
32
31
30
29
28
3
25
GND
VCC_LO
4
24
GND
GND
5
23
LO_SEL
VCC_LO
6
22
PWRDN
GND
7
21
VCC_LO
N/C
8
20
GND
RFB
9
19
LO1
10
11
12
13
14
15
16
17
18
N/C
GND
RIFB
GND
VCC_IFB
26
N/C
2
IFB–
N/C
IFB+
LO2
GND
27
N/C
1
VCC_RFB
RFA
S2028
Figure 2. SKY73083-21 Pinout – 36-Pin MCM
(Top View)
Table 1. SKY73083-21 Signal Descriptions
Pin #
Name
Description
Pin #
Name
Description
1
RFA
RF channel A input
19
LO1
Local oscillator #1 input
2
N/C
No connect
20
GND
Ground
3
GND
Ground
21
VCC5
DC supply, +5 V
4
VCC1
DC supply, +5 V
22
PWRDN
Power-down mode enable
5
GND
Ground
23
LO_SEL
Local oscillator switch select
6
VCC2
DC supply, +5 V
24
GND
Ground
7
GND
Ground
25
GND
Ground
8
N/C
No connect
26
GND
Ground
9
RFB
RF channel B input
27
LO2
Local oscillator #2 input
10
VCC3
DC supply, +5 V
28
N/C
No connect
11
N/C
No connect
29
RIFA
IF channel A bias control
12
GND
Ground
30
VCC6
DC supply, +5 V
13
IFB+
IF channel B positive output
31
N/C
No connect
14
IFB–
IF channel B negative output
32
IFA+
IF channel A positive output
15
N/C
No connect
33
IFA–
IF channel A negative output
16
VCC4
DC supply, +5 V
34
GND
Ground
17
RIFB
IF channel B bias control
35
N/C
No connect
18
N/C
No connect
36
VCC7
DC supply, +5 V
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
Functional Description
The SKY73083-21 is a high gain diversity mixer, optimized for
base station receiver applications. The device consists of two
diversity channels, each consisting of a low loss RF balun, high
linearity passive mixer, and a low noise IF amplifier.
The SKY73083-21 also includes a power-down feature used to
lower the supply current for standby operation.
LO amplifiers are also included that allow the SKY73083-21 to
connect directly to the output of a Voltage Controlled Oscillator
(VCO). This eliminates the extra gain stages needed by most
discrete passive mixers. A Single Pole, Double Throw (SPDT)
switch has been included to select between two different LO
inputs for frequency hopping applications (i.e., GSM).
RF Baluns and Passive Mixer
The RF baluns provide a single ended input, which can easily be
matched to 50 using a simple matching circuit. The RF baluns
offer very low loss and excellent amplitude and phase balance.
The high linearity mixer is a passive, double balanced mixer that
provides a very low insertion loss, and excellent 3rd Order Input
Insertion Point (IIP3) and linearity performance.
Additionally, the balanced nature of the mixer provides for
excellent port-to-port isolation.
LO_SEL Logic:
State:
High
LO1 enabled
Low
LO2 enabled
For applications that do not require frequency hopping, LO_SEL is
fixed to one state and the appropriate LO input is used.
Power-Down Mode
The SKY73083-21 also includes a low current power-down mode
controlled by pin 22 (PWRDN). When this pin is at a logic high
level, the power-down function is enabled with the total mixer
current under 1 μA.
IF Amplifier
The SKY73083-21 includes high dynamic range IF amplifiers that
follow the passive mixers in the signal path. The outputs require a
supply voltage connection using inductive chokes. These choke
inductors should be high-Q and have the ability to handle 200 mA
or greater.
A simple matching network allows the output ports to be matched
to a balanced 200 impedance. The IF amplifiers are optimized
for IF frequencies between 50 and 500 MHz. The IF amplifiers can
be operated outside of this range, but with a slight degradation in
performance.
LO Buffers and SPDT LO Switch
The LO buffers allow the input power of the SKY73083-21 to be
programmed in the range of –6 to +6 dBm. The LO section has
been optimized for high-side LO injection. However, the LO can be
driven over a wide frequency range with only slight degradation in
performance.
A high isolation SPDT switch allows the SKY73083-21 to be used
for frequency hopping applications. This switch provides greater
than 60 dB of LO1 to LO2 isolation:
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY73083-21 are provided
in Table 2. The recommended operating conditions are specified
in Table 3 and electrical specifications are provided in Table 4.
Spurious suppression measurements are listed in Table 5.
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
Table 2. SKY73083-21 Absolute Maximum Ratings
Parameter
Symbol
Supply voltage, +5 V (VCC1 – VCC7)
VCC
Supply current
ICC
RF input power
PRF
LO input power
PLO
Operating case temperature
TC
Junction temperature
TJ
Storage case temperature
TSTG
Minimum
Typical
Maximum
Units
4.5
5.0
5.5
V
370
0
–40
–40
420
mA
+20
dBm
+20
dBm
+85
C
+150
C
+125
C
Notes: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device.
Nominal thermal resistance (junction to center ground pad) is 5.1 C/W.
CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device
must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body
or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times.
Table 3. SKY73083-21 Recommended Operating Conditions
Parameter
Symbol
Minimum
Typical
Maximum
4.75
5.00
5.25
Supply voltage, +5 V (VCC1 – VCC7)
VCC
Supply current
ICC
RF frequency range
FRF
1700
2200
MHz
LO frequency range (Note 1)
FLO
1800
2550
MHz
IF frequency range
FIF
50
500
MHz
LO input power
PLO
–6
+6
dBm
LO select logic:
high
low
LO_SELH
LO_SELL
2.2
0.8
V
V
Operating case temperature
TC
–40
+85
C
370
0
V
mA
Note 1: The SKY73083-21 has been optimized for high-side LO injection. However, the LO can be used outside of the specified frequency range with degraded performance.
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Units
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
Table 4. SKY73083-21 Electrical Specifications (Note 1)
(Voltage Supply = +5 V, TC = +25 C, LO = 0 dBm, RF Frequency = 1750 MHz, IF Frequency = 350 MHz, LO Frequency = 2100 MHz, Unless
Otherwise Noted)
Parameter
Symbol
Conversion gain
G
Gain variation over temperature
G
Test Condition
Min
Typical
8.1
9.0
dB
±0.8
dB
Noise Figure
NF
8.9
Noise Figure variation over temperature
NF
±1.0
Noise Figure with a blocker signal
NFBLK
Blocking signal input
power = +8 dBm
3rd Order Input Intercept Point
IIP3
Tone space = 800 kHz,
input tone power =
–10 dBm
3rd Order Input Intercept Point variation over
temperature
IIP3
3rd Order Output Intercept Point
OIP3
Tone space = 800 kHz,
input tone power =
–10 dBm
2RF – 2LO
2x2
PRF = –10 dBm
3RF – 3LO
3x3
PRF = –10 dBm
Input 1 dB compression point
IP1dB
Output 1 dB compression point
OP1dB
18
+23.5
Max
11.0
Units
dB
dB
25
dB
+26.0
dBm
±0.6
dB
+34
dBm
–60
–68
dBc
–70
–80
dBc
+11.8
+13.6
dBm
+21.6
dBm
40
dB
LO1 to LO2 isolation
Channel-to-channel isolation
40
46
dB
RF to IF isolation
39
64
dB
LO leakage:
1XLO @ RF port
2XLO @ RF port
3XLO @ RF port
4XLO @ RF port
@ IF port
–25
–25
–60
–50
–35
–30
–27
–78
–80
–46
dBm
dBm
dBm
dBm
dBm
–20
+150
Logic input current
Power-down current
IOFF
PWRDN = 1
Power-down/up time
LO switching time
+250
μA
2
μA
1
μs
1.0
μs
RF port input return loss
ZIN_RF
With external matching
components
14
dB
LO port input return loss
ZIN_LO
With external matching
components
14
dB
IF port input return loss
ZOUT_IF
With external matching
components
14
dB
Note 1: Performance is guaranteed only under the conditions listed in this Table.
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
Table 5. SKY73083-21 Spur Suppression Measurements, 3GPP Band #3 (Note 1)
Parameter
Symbol
Test Condition
Maximum
(dBc)
Typical
(dBc)
4RF-3LO
4X3
PRF = –3
–95
–102
5RF-4LO
5X4
PRF = +3
–95
–102
6RF-5LO
6X5
PRF = +5, FRF = 1790 MHz,
IF spur = 240 MHz
–95
–107
6RF-5LO
6X5
PRF = +5, FRF = 1705 MHz,
IF spur = 270 MHz
–95
–108
7RF-6LO
7X6
PRF = +5
–95
–118
8RF-7LO
8X7
PRF = +5
–95
–115
9RF-7LO
9X7
PRF = +5
–95
–123
9RF-8LO
9X8
PRF = +5
–95
–112
10RF-8LO
10X8
PRF = +5
–95
–125
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Evaluation Board Description
Package Dimensions
The SKY73083-21 Evaluation Board is used to test the
performance of the SKY73083-21 downconversion mixer. An
assembly drawing for the Evaluation Board is shown in Figure 3
and the layer detail is provided in Figure 4. A schematic diagram
of the SKY73083-21 Evaluation Board is shown in Figure 5.
The PCB layout footprint for the SKY73083-21 is provided in
Figure 6. Figure 7 shows the package dimensions for the 36-pin
MCM and Figure 8 provides the tape and reel dimensions.
Package and Handling Information
Circuit Design Configurations
The following design considerations are general in nature and
must be followed regardless of final use or configuration:
1. Paths to ground should be made as short as possible.
2. The ground pad of the SKY73083-21 has special electrical
and thermal grounding requirements. This pad is the main
thermal conduit for heat dissipation. Since the circuit board
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.
3. Skyworks recommends including external bypass capacitors
on the VCC voltage inputs of the device.
4. Components L5, L6, L14, and L15 (see Figure 5) are high-Q
low loss inductors. These inductors must be able to pass
currents in excess of 200 mA DC.
Since the device package is sensitive to moisture absorption, it is
baked and vacuum packed before shipping. Instructions on the
shipping container label regarding exposure to moisture after the
container seal is broken must be followed. Otherwise, problems
related to moisture absorption may occur when the part is
subjected to high temperature during solder assembly.
THE SKY73083-21 is rated to Moisture Sensitivity Level 3 (MSL3)
at 260 C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
PCB Design & SMT Assembly/Rework Guidelines for MCM-L
Packages, document number 101752.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
5. Components R1 and R2 (see Figure 5) set the bias current for
the IF amplifiers. Skyworks recommends that these resistors
have a tolerance of 1% to optimize performance consistency
of the SKY73083-21. These resistors are not required for the
Evaluation Board to operate as specified in Tables 3 and 4.
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
J5
J7
C29
C34 C35
L16 L17
R4
C28
L13 L12
T2
J3
J1
C33
C32
L14
C38
C26
R5
C27
C1
C23
C4
C21
C20
C5
L4
C24
C18
C17
C8
C6
C25
L11
L2
L3
C39
R2
C3
C2
L1
L15
C7
C41
L5
L6
C12
R1
C14
R6
C13
C11
C22 R10
R7
R9
R8
L10
C19
C40
T1
J2
J4
R3
L18
J8
L8
L19
C36 C37
P1
C42
C15
L9
C16
J6
S1037
Figure 3. SKY73083-21 Evaluation Board Assembly Diagram
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
Layer 1: Top – Metal
Layer 2: Ground
Layer 3: Power Plane
Layer 4: Solid Ground Plane
S1038
Figure 4. SKY73083-21 Evaluation Board Layer Detail
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
R4
0Ω
DB714
L14
470 nH
L13
0Ω
T2
J5
C29
13 pF
L15
470 nH
VCC
L12
0Ω
C27
33 pF
C26
1 μF
VCC
R2
DNI
J7
L4
8.2 nH
L3
0Ω
C8
0Ω
C6
1.2 pF
x
8
9
N/C
RIFA
VCC6
N/C
IFA+
IFA–
GND
N/C
GND
VCC1
GND
SKY73083-21
GND
LO_SEL
VCC2
PWRDN
GND
VCC5
N/C
GND
RFB
11
12
13
14
15
x
10
16
LO1
17
L11
0Ω
27
26
C23
33 pF
J8
Element Jumper
25
VCC
C22
12 pF
24
Power-down
Enable
23
VCC
22
21
C21
33 pF
20
19
N/C
7
LO2
C20
1 μF
L10
0Ω
J3
C17
33 pF
18
R1
DNI
x
6
28
GND
RIFB
5
29
GND
VCC4
VCC
30
N/C
N/C
4
31
IFB–
3
32
x
2
33
IFB+
x
RFA
34
GND
C2
1.2 pF
1
35
N/C
C1
0Ω
VCC7
L2
8.2 nH
VCC3
L1
0Ω
x
36
J4
x
x
VCC
VCC
L5
470 nH
C14
33 pF
C13
1 μF
VCC
L6
470 nH
Note: The SKY73083-21 Evaluation Board can be converted to
provide a differential output by removing components
T1, T2, R3, and R4.
L9
0Ω
J6
C15
13 pF
T1
DB714
VCC
L8
0Ω
R3
0Ω
Some component labels may be different than the
corresponding component symbol shown here.
Component values, however, are accurate as of the
date of this Data Sheet.
S2029
Figure 5. SKY73083-21 Evaluation Board Schematic
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
6.3
0.4
Component Outline
0.25
0.075
0.15
0.075
0.75 0.9
12X 0.062
Stencil and
Metallization
6.3
36X 0.875
Component Outline
Solder Mask Opening
24X 0.125
SMT Pad Detail
Scale: 2X
9X This Rotation
9X Rotated 180o
9X Rotated 90o CW
9X Rotated 90o CCW
Stencil aperture size for center
ground pads should be 80% to
100% (by area) of the solder
mask opening of the package.
12X 0.063
24X 0.125
36X 0.875
Stencil Aperture
Top View
6.3
Pin 36
6.45
2X 2.775
3.88
Pin 1
2X 2.775
6.45
6.3
3.88
0.5
Pitch
Typ
0.25 Typ
Component Outline
Metallization
Top View
Note: The cross-hatched area represents the merger of the center
ground pad +9 individual I/O ground pads. All I/O ground
pads should have at least one via connected to internal ground
planes for optimum electrical performance.
Component Outline
Solder Mask Opening
Thermal Via Array.
∅0.3 mm on 0.6 mm pitch.
Top View
Additional vias in common ground
pad will improve thermal and electrical
performance. NOTE: thermal vias
should be tented and filled with solder
mask, 30-35 μm Cu plating recommended.
All measurements are in millimeters
S1125
Figure 6. PCB Layout Footprint for the SKY73083-21 6 x 6 mm MCM
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
18X 2.9
Pin 1 Indicator
C
Pin 36
4X 2
B
6
Pin 1 Indicator
(See Detail D)
Pin 1
4X 1.5
4X 0.5
4X 1
A
4X 2
4X 1
4X 1.5
6
4X 0.5
2X 1.9
18X 2.9
36x SMT Pad
0.15 A B C
1.05 ± 0.1
A
3X R0.2
2X 1.9
0.1
0.15 A B C
Top View
Side View
Bottom View
Solder Mask Opening
0.2 A B C
0.5 ± 0.1
0.2 x 0.2
(0.1)
0.25 ± 0.05
0.4 ± 0.05
Detail D
Metal Pad Edge
All measurements are in millimeters
Detail A
Pads are solder mask defined on one edge and metal
defined on three edges.
Dimensioning and tolerancing according to ASME Y14.5M-1994
S1834
Figure 7. SKY73083-21 36-Pin MCM Package Dimensions
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PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
∅1.50 ± 0.10
0.25 ± 0.02 (T)
4.00 ± 0.10
2.00 ± 0.10
1.75 ± 0.10
6.35 ± 0.10 (Bo)
A
A
B
1.30 ± 0.10 (Ko)
12.00 ± 0.20
B
5.50 ± 0.10
Pin #1 Indicator
(see Notes)
∅1.55 ± 0.05
8.00 ± 0.10
B
6.35 ± 0.10 (Ao)
Notes:
1. Carrier tape: black conductive polycarbonate
2. Cover tape material: transparent conductive PSA
3. Cover tape size: 9.3 mm width
4. All dimensions are in millimeters
5. Pin 1 orientation is in top left corner for the following Skyworks products:
A
SKY73022-21, -31
SKY73023-21, -31
For all other 6 x 6 mm MCM/RFLGA products, pin 1 orientation is
in top right corner.
Figure 8. SKY73083-21 Tape and Reel Dimensions
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S1850
PRELIMINARY DATA SHEET • SKY73083-21 DOWNCONVERSION MIXER
Ordering Information
Model Name
SKY73083-21 1700-2200 MHz Downconversion Mixer
Manufacturing Part Number
SKY73083-21
Evaluation Board Part Number
TW18-D730
Copyright © 2010 Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by
Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the
information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to
update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or
information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions
of Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A
PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY
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SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION,
LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury,
death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any
damages resulting from such improper use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of
products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for
applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.
Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands
and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com,
are incorporated by reference.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201311A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • June 23, 2010
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