SKY66420-11 (Skyworks)
860 to 930 MHz RF Front-End Module

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DATA SHEET
SKY66420-11: 860 to 930 MHz RF Front-End Module
Applications
LP-WAN devices
Internet of Things
Smart meters
Industrial applications
Range extender
Logic
Control
PA
Features
Integrated PA with +27 dBm output power
Integrated LNA with noise figure of 1.5 dB, typical
Alternate TX input pin simplifies connection to any SoC
Transmit bypass path with low loss: < 1.5 dB
Single-ended 50 transmit/receive RF interface
Fast turn-on/turn-off time: <4 μs Rx mode and <2 μs Tx mode
Low-gain power amplifier
Supply voltage: 2.0 to 4.8 V
Sleep mode current: < 1 μA
MCM (16-pin, 3.0 x 3.0 x 0.75 mm) NiPdAu plated package
(MSL3, 260 C per JEDEC J-STD-020)
Skyworks GreenTM products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of GreenTM, document number
SQ04–0074.
16 15 14 13
TX 1
12 GND
RX 2
11 TX_IN
GND
TX_ALT 3
10 GND
CSD 4
9 ANT
5678
204006-002
TX
RX
TX_ALT
ANT
LNA
LNA_IN
RX_FLT
204006-001
Figure 1. SKY66420-11 Block Diagram
Description
The SKY66420-11 is a high-performance, highly integrated RF
front-end module designed for high-power Industrial, Scientific,
Medical (ISM) band applications operating in the 860 to 930 MHz
frequency range.
The SKY66420-11 is designed for ease of use and maximum
flexibility with fully matched 50 TX (or TX_ALT) and RX inputs
and antenna outputs, and digital controls compatible with 1.6 to
3.6 V CMOS levels.
The RF blocks operate over a wide supply voltage range from 2.0
to 4.8 V allowing the SKY66420-11 to be used in battery powered
applications over a wide spectrum of the battery discharge curve.
The SKY66420-11 is packaged in a 16-pin, 3.0 x 3.0 x 0.75 mm
Multi-Chip Module (MCM) package.
A functional block diagram of the SKY66420-11 is provided in
Figure 1. Figure 2 shows the pinout for the SKY66420-11. Table 1
lists the pin assignments and signal descriptions.
Figure 2. SKY66420-11 Pinout
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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SKY66420-11 (Skyworks)
860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Table 1. SKY66420-11 Signal Descriptions
Pin Name
Description
1 TX
Transmit mode RF input
2 RX
Receive mode RF output
3 TX_ALT
Transmit mode RF input (alternate pin)
4 CSD
Shutdown control input
5 CPS
Bypass mode select input
6 CTX
Transmit mode select input
7 LNA_IN
LNA input (from RX filter)
8 RX_FLT
RX signal from antenna (to RX filter)
9 ANT
Connect to 50 Ω antenna filter
Pin Name
10 GND
11 TX_IN
12 GND
13 PA_OUT
14 N/C
15 VCC0
16 VCC1
Paddle GND
Description
Connect to PCB ground
TX input signal to antenna (from OMN)
Connect to PCB ground
PA output and positive power supply
Not connected internally to the device
Positive power supply
Positive power supply
Exposed die paddle; electrical and thermal
ground. Connect to PCB ground
Electrical and Mechanical Specifications
Table 2 provides the absolute maximum ratings, and Table 3
shows the recommended operating conditions. Electrical
specifications are provided in Tables 4 through 6.
The state of the SKY66420-11 is determined by the control logic
shown in Tables 7 and 8. Typical performance characteristics are
shown in Figures 3 through 10.
Table 2. SKY66420-11 Absolute Maximum Ratings1
Parameter
Symbol
Minimum
Maximum
Units
Supply voltage on VCC0 (no RF)
VCC0
-0.3 +5.5
V
Supply voltage on VCC1 and PA_OUT (no RF)
VCC
-0.3 +5.5
V
Operating temperature
TA
-40 +85
°C
Storage temperature
TSTG
-40 +125
°C
Tx input power at TX port
PIN_TX_MAX
+17 dBm
TX input power at TX port (bypass mode)
PIN_TX_BYP_MAX
+20 dBm
Rx input power at ANT port
PIN_RX_MAX
+10 dBm
Electrostatic discharge:
ESD
Human Body Model (HBM), Class 1C
1000 V
1 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.
ESD HANDLING: 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 when handling or transporting. Static charges may easily produce
potentials of several kilovolts on the human body or equipment, which can discharge without detection.
Industry-standard ESD handling precautions should be used at all times.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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SKY66420-11 (Skyworks)
860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Table 3. SKY66420-11 Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max Units
Supply voltage on VCC0
VCC0
2.0 3.3 4.8
V
Supply voltage on VCC1 and PA_OUT
VCC
2.0 3.3 4.8
V
Ambient temperature
TA
-40 +25 +85
°C
Table 4. SKY66420-11 DC Electrical Specifications1
(Vcc0 = Vcc1 = 3.3 V, f = 915 MHz, TA = +25 C, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Total supply current, transmit mode
ICC_TX27
POUT = +27 dBm
Total supply current, receive mode
ICC_RX
No RF
Total supply current, transmit bypass mode ICC_TXB
No RF
Quiescent current
ICQ_TX
No RF
Sleep supply current
ICC_OFF
No RF
1 Performance is guaranteed only under the conditions listed in this table.
Min Typ Max Units
280 mA
5 mA
200 μA
50 mA
1.00 μA
Table 5. SKY66420-11 AC Electrical Specifications: Transmit Mode
(Vcc0 = Vcc1 = 3.3 V, TA = +25 C, All Unused Ports Terminated at 50 , Unless Otherwise Noted. Input Port TX, Output Port ANT,
Matching Network Connected between the PA_OUT and TX_IN)
Parameter
Symbol
Test Condition
Min Typ Max Units
Frequency range
f
860 930 MHz
Output power at ANT1,2
POUT_915
POUT_868
f = 915 MHz
f = 868 MHz
+27 dBm
+27 dBm
Small signal gain1,2
S21_915
S21_868
f = 915 MHz
f = 868 MHz
16 dB
16 dB
Small signal gain variation1,2
Input return loss1,2
Output return loss1,2
S21
Peak to peak gain variation across
frequency band
S11 Into 50 (TX port)
S22 Into 50 (ANT port)
1
-10
-10
dB
dB
dB
Input 1 dB compression point, bypass mode
2nd harmonic3
3rd to 10th harmonic3
BYP_IP1dB
2fo
3fo to 10fo
Bypass mode
POUT = +27 dBm
POUT = +27 dBm
+20
dBm
+7 dBm
-42 dBm
Insertion loss (bypass mode)
Turn-on time4
Turn-off time5
S21_BYP
tON
tOFF
TX to ANT
1.5 dB
1 2 μs
1 μs
Stability
STAB
CW, PIN = +16 dBm
0.1 GHz to 20 GHz
load VSWR = 6:1
All non-harmonically related outputs less than -42 dBm
Ruggedness
RU
CW, POUT = +27 dBm into 50 Ω,
load VSWR = 10:1
1 900 to 930 MHz with specified matching network on the Evaluation Board.
2 860 to 870 MHz with specified matching network on the Evaluation Board.
3 Measured with continuous wave signal.
4 From 50% of CTX edge to 90% of final RF output power.
5 From 50% of CTX edge to 10% of initial RF output power.
No permanent damage
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Table 6. SKY66420-11 AC Electrical Specifications: Receive Mode
(Vcc0 = Vcc1 = 3.3 V, TA = +25 C, All Unused Ports Terminated at 50 Ω, Unless Otherwise Noted. Input Port ANT, Output Port RX, 0 Ω
Connected between RX_FLT and LNA_IN)
Parameter
Symbol
Test Condition
Min Typical Max
Units
Frequency range
fIN
860 930 MHz
Receive gain
RX_GAIN
18 dB
Receive noise figure
NF
1.5 2.5 dB
Input third order intercept
IIP3
-6.5 -2
dBm
Input 1-dB compression point
IP1dB
-16.5
-12
dBm
Antenna port return loss
S11ANT
Into 50 (ANT port)
-12
dB
RX port return loss
S22RX
Turn-on time1
tON
Turn-off time2
tOFF
1 From 50% of CTX edge to 90% of final RF output power.
2 From 50% of CTX edge to 10% of initial RF output power.
Into 50 (RX port)
-12
2.5
1
dB
μs
μs
Table 7. SKY66420-11 Electrical Specifications: Control Logic Characteristics1
(TA = +25 C, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Control voltage:
High
Low
VIH
VIL
1.62
0
Input current:
High IIH
Low IIL
1 Performance is guaranteed only under the conditions listed in this table.
2 Logic inputs must be VCC0 or GND to achieve specified sleep currents.
Typical
Max
VCC0
0.32
1
1
Units
V
V
μA
μA
Table 8. SKY66420-11 Electrical Specifications: Mode Control Logic (TA = +25)
Shutdown
Mode
CSD CTX
0 x1
Receive LNA mode
10
Transmit bypass
11
Transmit
1
1 X (don't care) inputs must be held at VCC0 or GND to achieve specified sleep current.
1
CPS
x1
x1
0
1
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Typical Performance Characteristics
(Vcc0 = Vcc1 = 3.3 V, f = 915 MHz, Ta = +25 C, Unless Otherwise Noted)
Figure 3. POUT and ICC vs PIN, CW
Figure 4. Gain vs POUT, CW
Figure 5. Small Signal Gain vs Frequency, CW
Figure 6. ICC vs POUT, CW
Figure 7. PAE vs POUT and VCC, CW
Figure 8. Gain vs POUT and VCC, CW
Figure 9. 2nd Harmonic vs POUT, CW
Figure 10. 3rd Harmonic vs POUT, CW
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Evaluation Board Description
The SKY66420-11-EK1 Evaluation Board is designed to
demonstrate the performance of the SKY66420-11 RF Front-End
Module. It is optimized for evaluation, experimentation, and
investigation, using CW (continuous wave) signals.
Figure 11 shows the Evaluation Board. The Evaluation Board
schematic diagram for 915 MHz application (EK1) is provided in
Figure 12. The Bill of Materials (BOM) for the SKY66420-11
Evaluation Board for 915 MHz application (EK1) is listed in Table 9
The Evaluation Board schematic diagram for 868 MHz (EK3) is
provided in Figure 13. The Bill of Materials (BOM) for the
SKY66420-11 Evaluation Board for 868 MHz (EK3) is listed in
Table 10.
PCB Recommendations
Top layer: Plan to add the footprint for a shield case over the RF
section.
Bottom layer: Lay out as much as possible for minimum traces on
the bottom. Having a solid ground plane under the shield case will
complete the shielding.
Avoid using thermal relief pads for ground connections of
components and the shield case. Always place vias close to each
shunt connection.
Spread ground vias equally in a manner that stitches the
grounds together.
Metal Layer 1 = RF traces (microstripes or coplanar) + control
lines. Core thickness between top RF layer and ground plane is
critical.
Metal Layer 2 = Solid ground plane. No trace routings.
Metal Layer 3 = Control lines + VCC traces (no VCC plane)
Metal Layer 4 = Solid ground plane under the shield case area.
Pour copper on each layer connected to the ground plane. Use
VCC traces in a star distribution pattern.
Figure 11. SKY66420-11 Evaluation Board
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Figure 12. SKY66420-11 Evaluation Board Schematic for 915 MHz Application (EK1)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Table 9. SKY66420-11 Evaluation Board Bill of Materials for 915 MHz Application1 (EK1)
Component
Value
Manufacturer
Mfr Part Number
Size
C2 10 nF Murata
GRM155R71H103KA88
0402
C3 33 pF Murata
GRM1555C1H330JA01
0402
C4
4.7 uF
Murata
GRM155R61A475MEAA 0402
C5
120 pF
Murata
GRM1555C1H121GA01
0402
C7 10 pF Murata
GRM1555C1E100JA01D 0402
R2,C8
DNI
0402
C9
2.4 pF
Murata
GRM1555C1H2R4CA01
0402
C10 2.2 pF Murata
GRM1555C1H2R2CA01
0402
C12,C13
DNI
Murata
0402
C14 DNI
C18 1 nF
Murata
FB1 120 Taiyo Yuden
GRM155R71H102KA01
BK1005HM121
0402
0402
J1,J2,J3,J5 SMA
Johnson Components 142-0701-851
End launch
J4 DNI
Amphenol
Amphenol_132134
L1
6.8 nH
Murata
LQW15AN6N8J00D
0402
L2
0.6 nH
Murata
LQP03TN0N8B02D
0201
L3
2.7 nH
Murata
LQG15WZ2N7S02D
0402
L4
7.5 nH
Murata
LQG15HN7N5J02
0402
L5,L6
4.7 nH
Murata
LQG15HN4N7S02
0402
PCB1
Z1185-B2
Skyworks
Z1185-B2
P1 HEADER 11X2 Molex
R1 0
Panasonic
10-89-1221
ERJ2GE0R00
11X2
0402
U1 SKY66420-11
1 Schematic and BOM have been designed to optimize performance with CW signals, 100% duty cycle.
Description
Ceramic capacitor 10000 pF 50 V X7R
Ceramic capacitor 33 pF 50 V C0G/NP0
Ceramic capacitor 4.7 uF 10 V X5R
Ceramic capacitor 120 pF 50 V C0G/NP0
Ceramic capacitor 10 pF 25 V C0G/NP0
Ceramic capacitor 2.4 pF 50 V C0G/NP0
Ceramic capacitor 2.2 pF 50 V C0G/NP0
Ceramic capacitor 1000 pF 50 V X7R
Ferrite bead 120 0402 1LN
Small end launch straight jack receptacle
Conn SMA jack straight 50 PCB
Fixed inductor 6.8 nH 600 mA 290 M
Fixed inductor 0.6 nH 850 mA 70 M
Fixed inductor 2.7 nH 900 mA 70 M
Fixed inductor 7.5 nH 500 mA 310 M
Fixed inductor 4.7 nH 700 mA 230 M
EVB
Header 11x2
Res SMD 0 jumper 1/10w 0402
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Figure 13. SKY66420-11 Evaluation Board Schematic for 868 MHz Application (EK3)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Table 10. SKY66420-11 Evaluation Board Bill of Materials for 868 MHz Operation1 (EK3)
Component
Value
Manufacturer
Mfr Part Number
Size
C2 10 nF Murata
GRM155R71H103KA88
0402
C3 33 pF Murata
GRM1555C1H330JA01
0402
C4
4.7 uF
Murata
GRM155R61A475MEAA 0402
C5
120 pF
Murata
GRM1555C1H121GA01
0402
R2, C7
DNI
GRM1555C1E100JA01D
C8 10 pF Murata
0402
C9
2.4 pF
Murata
GRM1555C1H2R4CA01
0402
C10 2.2 pF Murata
GRM1555C1H2R2CA01
0402
C12,C13
DNI
Murata
0402
C14 1.5 pF Murata
GRM1555C1H1R5CA01
C18 1 nF
Murata
FB1 120 Taiyo Yuden
GRM155R71H102KA01
BK1005HM121
0402
0402
J1,J2,J3,J5 SMA
Johnson Components 142-0701-851
End launch
J4 DNI
Amphenol
Amphenol_132134
L1
6.8 nH
Murata
LQW15AN6N8J00D
0402
L2
0.8 nH
Murata
LQP03TN0N8B02D
0201
L3
2.7 nH
Murata
LQG15WZ2N7S02D
0402
L4
7.5 nH
Murata
LQG15HN7N5J02
0402
L5,L6
5.6 nH
Murata
LQG15HN5N6S02D
0402
PCB1
Z1185-B2
Skyworks
Z1185-B2
P1 HEADER 11X2 Molex
R1 0
Panasonic
10-89-1221
ERJ2GE0R00
11X2
0402
U1 SKY66420-11
1 Schematic and BOM have been designed to optimize performance with CW signals, 100% duty cycle.
Description
Ceramic capacitor 10000 pF 50 V X7R
Ceramic capacitor 33 pF 50 V C0G/NP0
Ceramic capacitor 4.7uF 10 V X5R
Ceramic capacitor 120 pF 50 V C0G/NP0
Ceramic capacitor 10 pF 50 V X7R
Ceramic capacitor 2.4 pF 50 V C0G/NP0
Ceramic capacitor 2.2 pF 50 V C0G/NP0
Ceramic capacitor 1.5 pF 50 V C0G/NP0
Ceramic capacitor 1000 pF 50 V X7R
Ferrite bead 120 0402 1LN
Small end launch straight jack receptacle
Conn SMA jack straight 50 PCB
Fixed inductor 6.8 nH 600 mA 290 M
Fixed inductor 0.8 nH 850 mA 70 M
Fixed inductor 2.7 nH 800 mA 70 M
Fixed inductor 7.5 nH 500 mA 310 M
Fixed inductor 5.6 nH 600 mA 260 M
EVB
Header 11x2
Res SMD 0 jumper 1/10w
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Package Dimensions
The layout footprint for the SKY66420-11 is provided in Figure 14.
Typical part markings are shown in Figure 15. Package
dimensions for the SKY66420-11 are shown in Figure 16, and
tape and reel dimensions are provided in Figure 17.
Package and Handling Information
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 SKY66420-11 is rated to Moisture Sensitivity Level 1 (MSL1)
at 260 C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
Solder Reflow Information, document number 200164.
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.
Figure 14. SKY66420-11 Recommended Footprint
(Top View)
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Figure 15. Typical Part Markings
(Top View)
Figure 16. SKY66420-11 Package Dimensions
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Figure 17. SKY66420-11 Tape and Reel Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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860 to 930 MHz RF Front-End Module

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DATA SHEET • SKY66420-11: 860 TO 930 MHz RF FRONT-END MODULE
Ordering Information
Part Number
SKY66420-11
SKY66420-11
Product Description
RF Front-End Module 915 MHz
RF Front-End Module 868 MHz
Evaluation Board Part Number
SKY66420-11EK1
SKY66420-11EK3
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information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to
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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 and the Skyworks symbol are trademarks or registered trademarks of Skyworks Solutions, Inc. or its subsidiaries 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
14 June 18, 2018 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 204006G




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