Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200046G • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 19, 2009 1
DATA SHEET
SMP1345 Series: Very Low Capacitance, Plastic Packaged
Silicon PIN Diodes
Applications
xHigh isolation LNBs, WLANs, and wireless switches
Features
xVery low insertion loss: 0.4 dB
xCapacitance: 0.15 pF
xPackages rated MSL1, 260 qC per JEDEC J-STD-020
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances) compliant packaging.
Description
The SMP1345 series of plastic packaged, surface mountable PIN
diodes is designed for high volume Low-Noise Block (LNB),
Wireless Local Area Network (WLAN), and switch applications
from 10 MHz to 6 GHz. The short carrier lifetime of 100 ns
(typical), combined with their thin I-region width of 10 μm
(nominal) results in a group of fast speed RF switching PIN diodes.
The RF performance of the SMP1345 series is assured by virtue
of their very low capacitance (0.15 pF) and low resistance (1.5 Ω
at 10 mA). The SMP1345-518 has been specifically designed for
WLAN 802.11 a/b/g applications. It is ideally suited for diversity
switch applications.
Table 1 describes the various packages and marking of the
SMP1345 series.
Table 1. SMP1345 Series Packaging and Marking
Common Anode Common Cathode Series Pair Single Ring
SOT-23 SOT-23 SOT-23 SC-79 LGA
SMP1345-003
Marking: PU9
SMP1345-004
Marking: PU3
SMP1345-005
Marking: PU2
♦SMP1345-518
Marking: 0
Pb-Free
SMP1345-003LF
Marking: RU9
SMP1345-004LF
Marking: RU3
SMP1345-005LF
Marking: RU2
SMP1345-079LF
LS = 1.5 nH LS = 1.5 nH LS = 1.5 nH LS = 0.7 nH LS = 0.6 nH
SC-70
SMP1345-075LF
Marking: RU2
L
S = 1.4 nH
LF denotes lead (Pb)-free, RoHS-compliant packaging option as an alternative to the standard Skyworks tin/lead (Sn/Pb) packaging.
Innovation to Go™
Select Linear Products (indicated by ♦) now available for purchase online.
DATA SHEET • SMP1345 SERIES DIODES
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Electrical and Mechanical Specifications
The absolute maximum ratings of the SMP1345 series are
provided in Table 2. Electrical specifications are provided in
Table 3.
The state of the SMP1345-518 series diode is determined by the
logic provided in Table 4. Typical performance characteristics of
the SMP1345 series are illustrated in Figures 1 to 5.
Table 2. SMP1345 Series Absolute Maximum Ratings
Parameter Symbol Minimum Maximum Units
Reverse voltage VR 50 V
Power dissipation @ 25 °C lead temperature PD 250 mW
Storage temperature TSTG –65 +150 qC
Operating temperature TA –65 +150 qC
Note: 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.
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. The
SMP1345 series PIN diodes are Class 1B ESD devices.
Table 3. SMP1345 Series Electrical Specifications (Note 1)
(TA = +25 qC, Unless Otherwise Noted)
Parameter Symbol Test Condition Min Typical Max Units
Reverse current IR V
R = 50 V 10 μA
Capacitance CT F = 1 MHz
V = 1 V
V = 5 V
0.19
0.18
0.20
pF
pF
Resistance RS F = 100 MHz
I = 1 mA
I = 10 mA
3.5
1.5
2.0
Ω
Ω
Forward voltage VF I
F = 10 mA 0.89 V
Carrier lifetime TI IF = 10 mA 100 ns
I region width 10 μm
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Table 4. SMP1345-518 PIN Diode Truth Table
CTR1 (V) CTR2 (V) Low Loss Paths
3.3 0 RF1 to RF4
RF2 to RF3
0 3.3 RF1 to RF3
RF2 to RF4
DATA SHEET • SMP1345 SERIES DIODES
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Typical Performance Characteristics
Reverse Voltage (V)
Capacitance (pF)
0 5 10 15 2520 30
0.05
0.10
0.15
0.20
Figure 1. Total Capacitance vs Reverse Voltage
(SC-79 Package Measurement)
Frequency (GHz)
Insertion Loss (dB)
1.0 2.0 3.0 4.0
–2.4
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
–2.2
–0.4
–0.6
–0.8
–0.2
Figure 3. Insertion Loss vs Frequency
Frequency (GHz)
Return Loss (dB)
1.0 2.0 3.0 4.0
–20
–21
–22
–23
–24
–25
–13
–14
–15
–16
–17
–18
–19
Figure 5. Return Loss vs Frequency
0.01 0.1 1 10 100
Forward Current (mA)
Series Resistance (Ω)
0.01
0.1
1
10
100
Figure 2. Series Resistance vs Current @ 100 MHz
Frequency (GHz)
Isolation (d B)
1.0 2.0 3.0 4.0
–32
–18
–20
–22
–24
–26
–28
–30
Figure 4. Isolation vs Frequency
DATA SHEET • SMP1345 SERIES DIODES
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Evaluation Board Description
An Evaluation Board is used to test the performance of the
SMP1345 series PIN diodes. An assembly drawing for the
Evaluation Board is shown in Figure 6. A typical application circuit
diagram for a DPDT diversity switch using the SMP1345-518 is
provided in Figure 7.
Package and Handling Information
Package dimensions are shown in Figures 8 to 11. 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 SMP1345 series is rated to Moisture Sensitivity Level 1
(MSL1) at 260 qC. 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. For packaging details, refer to the Skyworks
Application Note Discrete Devices and IC Switch/Attenuators Tape
and Reel Package Orientation, document number 200083.
SMP1345-518
EVAL BOARD
REV 1
SK40253
RF4
C3
RF2
C2
RF3
C1
R2 C6
L2
R4
C8
L4
C7
R3
RF1 C4
L3
CTR2
CTR1
C5
R1
L1
2.000
1.500
0.014
S1668
A
ll measurements are in inches
Figure 6. SMP1345 Series PIN Diode Evaluation Board Assembly Diagram
DATA SHEET • SMP1345 SERIES DIODES
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R4 L4
C8
CTR2
VDC = 3.3 V
RF1
C4
C7
L3
R3
VDC = 3.3 V
CTR1
RF4
R1-R4: 0402 200 Ω
L1-L4: 0603 18 nH
C1-C8: 0402 10 pF
C3
C6 VDC = 3.3 V
CTR2
R2
L2
C2
RF2
C5
CTR1
R1
L1
VDC = 3.3 V
C1
RF3
SMP1345-518
S1666
Figure 7. WLAN Application Circuit for DPDT Diversity Switch Using The SMP1345-518
DATA SHEET • SMP1345 SERIES DIODES
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Pin 2
Pin 3
Pin 1
Pin 1
Pin 3
Pin 2
Pin 4
(1.03)
(0.73)
(0.30)
(0.00)
Pin 4
0.058 (1.47 mm)
0.054 (1.39 mm)
0.028 (0.70 mm)
0.023 (0.58 mm)
Side ViewTop View
0.048 (1.23 mm)
0.044 (1.13 mm)
(0.138 x 45)
(1.27)
(0.87)
(0.40)
(0.00)
Bottom View
(0.076) All Around
S1811
Dimensions are in inches (millimeters shown in parentheses)
Figure 8. LGA Package Dimension Drawing
3
2
1
0.031 (0.80 mm) Min.
0.039 (1.00 mm) Max.
0.000 (0.00 mm) Min.
0.004 (0.10 mm) Max.
0.010 (0.25 mm) Min.
0.016 (0.40 mm) Max.
0.071 (1.80 mm) Min.
0.087 (2.20 mm) Max.
0.071 (1.80 mm) Min.
0.094 (2.40 mm) Max.
0.045 (1.15 mm) Min.
0.053 (1.35 mm) Max.
0.026 (0.65 mm) Ref.
0.051 (1.30 mm) Ref.
0.004 (0.10 mm) Min.
0.007 (0.18 mm) Max.
0.004 (0.10 mm) Min.
0.012 (0.30 mm) Max.
0.014 (0.35 mm) Ref.
S1653
Dimensions are in inches (millimeters shown in parentheses)
Figure 9. SC-70 Package Dimension Drawing
DATA SHEET • SMP1345 SERIES DIODES
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0.060 (1.50 mm) Min.
0.067 (1.70 mm) Max.
0.010
(0.25 mm) Min.
0.014
(0.35 mm) Max.
0.043 (1.10 mm) Min.
0.051 (1.30 mm) Max.
0.020
(0.50 mm) Min.
0.028
(0.70 mm) Max.
0.003
(0.07 mm) Min.
0.008
(0.20 mm) Max.
10° Max.
10° Max.
0.028
(0.70 mm) Min.
0.035
(0.90 mm) Max.
0.006 (0.15 mm) Min.
Cathode
Indicator
12
S1652Dimensions are in inches (millimeters shown in parentheses)
Figure 10. SC-79 Package Dimension Drawing
3
2
1
0.035 (0.89 mm) Min.
0.044 (1.12 mm) Max.
0.0005 (0.01 mm) Min.
0.004 (0.10 mm) Max.
0.012 (0.30 mm) Min.
0.020 (0.50 mm) Max.
0.003 (0.080 mm) Min.
0.008 (0.20 mm) Max.
8° Max.
0.022 (0.55 mm) Ref.
0.110 (2.80 mm) Min.
0.120 (3.04 mm) Max.
0.083 (2.10 mm) Min.
0.104 (2.64 mm) Max.
0.037 (0.95 mm) Ref.
0.047 (1.20 mm) Min.
0.055 (1.40 mm) Max.
0.076 (1.92 mm) Ref.
0.020 (0.51 mm) Ref.
S1389
Dimensions are in inches (millimeters shown in parentheses)
Figure 11. SOT-23 Package Dimension Drawing
DATA SHEET • SMP1345 SERIES DIODES
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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
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