Product Specification
PE42851
UltraCMOS® SP5T RF Switch
100–1000 MHz
Product Description
The PE42851 is a HaRP™ technology-enhanced SP5T
high power RF switch supporting wireless applications
up to 1 GHz. It offers maximum power handling of
42.5 dBm continuous wave (CW). It delivers high
linearity and excellent harmonics performance. It has
both a standard and attenuated RX mode. No blocking
capacitors are required if DC voltage is not present on
the RF ports.
The PE42851 is manufactured on pSemi’s UltraCMOS®
process, a patented variation of silicon-on-insulator (SOI)
technology on a sapphire substrate, offering the
performance of GaAs with the economy and integration
of conventional CMOS.
Features
• Dual mode operation: SP5T or SP3T
• HaRP™ technology enhanced
• Fast settling time
• No gate and phase lag
• No drift in insertion loss and phase
• Up to 45 dBm instantaneous power
in 50Ω
• Up to 40 dBm instantaneous power
< 8:1 VSWR
• 36 dB TX to RX isolation
• Low harmonics of 2fo and 3fo = –80 dBc
(1.15:1 VSWR)
Figure 1. Package Type
• ESD performance
• 1.5 kV HBM on all pins
32-lead 5 × 5 mm QFN
Figure 2. Functional Diagram of SP3T
Configuration
ANT
TX1
TX1
TX2
TX2
TX3
V2
TX3
ANT
TX4
TX4
RX
RX
CMOS
Control Driver
and ESD
V1
Figure 3. Functional Diagram of SP5T
Configuration
V3
ANT can be tied to TX1 and TX2 or TX3 and TX4
Document No. DOC-13014-6 │ www.psemi.com
CMOS
Control Driver
and ESD
V1
V2
V3
SP5T, standard configuration
DOC-02178
©2012-2022 pSemi Corporation All rights reserved.
Page 1 of 12
PE42851
Product Specification
Table 1. Electrical Specifications @ –40 to +85 °C, VDD = 2.3–5.5V, VSS_EXT = 0V or VDD = 3.4–5.5V, VSS_EXT
= –3.4V (ZS = ZL = 50Ω ), unless otherwise noted1
Parameter
Path
Condition
Min
Operating frequency
Typ
100
Insertion loss2
ANT–TX
Insertion loss2
(un-attenuated state)
ANT–RX
Max
Unit
1000
MHz
Active TX port 1, 2, 3 or 4 @ rated power (–40 °C, +25 °C)
100–520 MHz
520–1000 MHz
0.25
0.40
0.35
0.55
dB
dB
Active TX port 1, 2, 3 or 4 @ rated power (+85 °C)
100–520 MHz
520–1000 MHz
0.30
0.50
0.40
0.60
dB
dB
Active RX port (–40 °C, +25 °C)
100–520 MHz
520–1000 MHz
0.60
0.70
0.70
0.90
dB
dB
Active RX port (+85 °C)
100–520 MHz
520–1000 MHz
0.70
0.80
0.80
1.00
dB
dB
1575 MHz for GPS RX, < –10 dBm, +25 °C
1.2
1.3
dB
16.8
dB
ANT–RX
Active RX port
100–1000 MHz
15.2
16
Isolation (supply biased)
TX–TX
100–520 MHz
520–1000 MHz
33
29
36
30
dB
dB
Isolation (supply biased)
TX–RX
100–520 MHz
520–1000 MHz
34
29
36
30
dB
dB
Insertion loss (attenuated state)
2
Unbiased isolation
VDD, V1, V2, V3 = 0V
ANT–TX
+27 dBm
6
dB
Unbiased isolation
VDD, V1, V2, V3 = 0V
ANT–RX
+27 dBm
14
dB
Un-attenuated state
100–520 MHz
520–1000 MHz
22
18
27
22
dB
dB
Un-attenuated state, 1575 MHz for GPS RX, < –10 dBm, +25 °C
10
14
dB
Attenuated state, optimized without attenuator engaged
100–520 MHz
520–1000 MHz
16
13
21
18
dB
dB
100–520 MHz
520–1000 MHz
21
15
28
17
dB
dB
Return loss2
ANT–RX
Return loss2
ANT–TX
TX
100–520 MHz @ +40.0 dBm
521–870 MHz @ +38.5 dBm
871–1000 MHz @ +37.5 dBm
–80
–78
dBc
2nd and 3rd harmonic
(< 8:1 VSWR)
TX
100–520 MHz @ +40.0 dBm (pulsed signal, at 10% duty cycle3)
521–870 MHz @ +38.5 dBm (pulsed signal, at 10% duty cycle3)
871–1000 MHz @ +37.5 dBm (pulsed signal, at 10% duty cycle3)
–76
–70
dBc
2nd and 3rd harmonic
(50Ω source/load impedance)
TX
100–1000 MHz @ +45.0 dBm (pulsed signal, at 10% duty cycle3)
–76
–70
dBc
TX
100–1000 MHz @ +42.5 dBm (CW)
–78
–74
dBc
2nd and 3rd harmonic
(< 1.15:1 VSWR)
2nd and 3rd harmonic
(50Ω source/load impedance)
Input 0.1dB compression point
5
IIP3
ANT–TX
RX
1000 MHz
45.5
Un-attenuated state
Attenuated state
42
38
dBm
dBm
dBm
Settling time
From 50% control until harmonics within specifications
15
µs
Switching time in normal mode4
(VSS_EXT = 0V)
50% CTRL to 90% or 10% of RF
6
µs
Switching time in bypass mode4
(VSS_EXT = –3.4V)
50% CTRL to 90% or 10% of RF
4
µs
Notes: 1. In a 2TX–1RX SP3T configuration, TX1 and TX2 are tied and TX3 and TX4 are tied respectively. Refer to Application Note AN35 for SP3T performance data.
2. Narrow trace widths are used near each port to improve impedance matching. Refer to evaluation board layouts (Figure 23) and schematic (Figure 24) for details.
3. 10% of 4620 µs period.
4. Normal mode: connect VSS_EXT (pin 16) to GND (VSS_EXT = 0V) to enable internal negative voltage generator. Bypass mode: use VSS_EXT (pin 16) to bypass and
disable internal negative voltage generator.
5. The input 0.1dB compression point is a linearity figure of merit. Refer to Table 3 for the RF input power PIN.
©2012-2022 pSemi Corporation All rights reserved.
Page 2 of 12
Document No. DOC-13014-6 │ UltraCMOS® RFIC Solutions
PE42851
Product Specification
25 GND
26 GND
27 GND
28 ANT
29 GND
30 GND
Pin 1 dot
marking
31 GND
32 GND
Figure 4. Pin Configuration (Top View)*
Parameter
GND
1
24 GND
TX1
2
23 TX4
GND
3
22 GND
TX2
4
GND
5
GND
6
19 GND
GND
7
18 GND
RX
8
17 GND
21 TX3
16
VSS_EXT
15
20 GND
V1
14
V2
13
V3
12
VDD
11
GND
10
GND
GND
9
Exposed
Ground Pad
Table 3. Operating Ranges1
Note: * Pins 1, 3, 5, 7, 9, 10, 17, 19, 20, 22, 24, 26, 27, 29, 30 and 31 can be
N/C if deemed necessary by the customer
Symbol
Min
Typ
Max
Unit
Supply voltage (normal
mode, VSS_EXT = 0V)
VDD
2.3
5.5
V
Supply voltage (bypass
mode, VSS_EXT = –3.4V,
VDD ≥ 3.4V for full spec.
compliance)
VDD
2.7
5.5
V
Negative supply voltage
(bypass mode)
VSS_EXT
–3.6
–3.2
V
Supply current (normal
mode, VSS_EXT = 0V)
IDD
130
200
µA
Supply current (bypass
mode, VSS_EXT = –3.4V)
IDD
50
80
µA
Negative supply current
(bypass mode, VSS_EXT =
–3.4V)
ISS
–40
Digital input high
(V1, V2, V3)
VIH
1.17
3.6
V
Digital input low
(V1, V2, V3)
VIL
–0.3
0.6
V
3.4
–16
µA
TX RF input power2,3
PIN–TX
40
dBm
TX RF input power2,3
(50Ω source/load
PIN–TX
45
dBm
Table 2. Pin Descriptions
Pin #
Pin Name
1, 3, 5–7, 9–
11, 17–20,
22, 24–27,
29–32
GND
Ground
TX RF input power2
(50Ω source/load
PIN–TX
42.5
dBm
2
TX12
Transmit pin 1
ANT RF input power,
PIN–ANT
27
dBm
4
TX21,2
Transmit pin 2
8
RX2
Receive pin
RX RF input power2
PIN–RX
27
dBm
12
VDD
Supply voltage (nominal 3.3V)
85
°C
13
V3
Digital control logic input 3
14
V2
Digital control logic input 2
135
°C
15
V1
Digital control logic input 1
16
VSS_EXT3
21
TX3
23
TX4
28
ANT
Antenna pin
Pad
GND
Exposed pad: ground for proper operation
Notes:
Description
External VSS negative voltage control
2
Transmit pin 3
1,2
Transmit pin 4
2
Operating temperature
range (case)
Operating junction
temperature
TOP
Tj
–40
Notes: 1. In a 2TX–1RX SP3T configuration, TX1 and TX2 are tied and TX3
and TX4 are tied respectively. Refer to Application Note AN35 for
SP3T performance data.
2. Supply biased.
3. Pulsed, 10% duty cycle of 4620 µs period.
1. To operate the part as a 2TX–1RX SP3T, tie TX1 to TX2 and TX3
to TX4 respectively. Refer to Application Note AN35 for SP3T
performance data.
2. RF pins 2, 4, 8, 21, 23 and 28 must be at 0 VDC. The RF pins do
not require DC blocking capacitors for proper operation if the 0 VDC
requirement is met.
3. Use VSS_EXT (pin 16) to bypass and disable internal negative voltage
generator. Connect VSS_EXT (pin 16) to GND (VSS_EXT = 0V) to enable
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©2012-2022 pSemi Corporation All rights reserved.
Page 3 of 12
PE42851
Product Specification
Table 4. Absolute Maximum Ratings
Parameter/Condition
Switching Frequency
Symbol
Min
Max
Unit
VDD
–0.3
5.5
V
Digital input voltage
(V1, V2, V3)
VCTRL
–0.3
3.6
V
TX RF input power1(50Ω
PIN–TX
45
dBm
TX RF input power1
PIN–TX
40
dBm
ANT RF input power, unbiased
PIN–ANT
27
dBm
RX RF input power1
PIN–RX
27
dBm
150
°C
Supply voltage
Storage temperature range
TST
Maximum case temperature
TCASE
85
°C
Tj
200
°C
ESD voltage HBM2, all pins
VESD,HBM
1500
V
ESD voltage MM3, all pins
VESD,MM
200
V
ESD voltage CDM4, all pins
VESD,CDM
1000
V
Peak maximum junction
temperature
(10 seconds max)
–65
Notes: 1. Supply biased
2. Human Body Model (MIL-STD 883 Method 3015)
3. Machine Model (JEDEC JESD22-A115)
4. Charged Device Model (JEDEC JESD22-C101)
The PE42851 has a maximum 10 kHz switching
rate when the internal negative voltage generator
is used (pin 16 = GND). The rate at which the
PE42851 can be switched is only limited to the
switching time (Table 1) if an external negative
supply is provided (pin 16 = VSS_EXT).
Switching frequency describes the time duration
between switching events. Switching time is the
time duration between the point the control signal
reaches 50% of the final value and the point the
output signal reaches within 10% or 90% of its
Optional External VSS Control (VSS_EXT)
For proper operation, the VSS_EXT control pin must
be grounded or tied to the Vss voltage specified in
Table 3. When the VSS_EXT control pin is grounded,
FETs in the switch are biased with an internal
voltage generator. For applications that require the
lowest possible spur performance, VSS_EXT can be
applied externally to bypass the internal negative
Exceeding absolute maximum ratings may cause
permanent damage. Operation should be
restricted to the limits in the Operating Ranges
table. Operation between operating range
maximum and absolute maximum for extended
periods may reduce reliability.
Spurious Performance
Electrostatic Discharge (ESD) Precautions
Table 5. Truth Table
When handling this UltraCMOS device, observe
the same precautions that you would use with
other ESD-sensitive devices. Although this device
contains circuitry to protect it from damage due to
ESD, precautions should be taken to avoid
Latch-Up Avoidance
Unlike conventional CMOS devices, UltraCMOS
devices are immune to latch-up.
Moisture Sensitivity Level
The typical spurious performance of the PE42851
is –130 dBm when VSS_EXT = 0V (pin 16 = GND). If
further improvement is desired, the internal
negative voltage generator can be disabled by
setting VSS_EXT = –3.4V.
Path
V3
V2
V1
ANT – RX Attenuated
L
L
L
ANT – TX1
L
L
H
ANT – TX2
L
H
L
ANT – TX1 and TX2*
L
H
H
ANT – RX
H
L
L
ANT – TX3
H
L
H
ANT – TX4
H
H
L
ANT – TX3 and TX4*
H
H
H
Note: * In a 2TX–1RX SP3T configuration, TX1 and TX2 are tied and TX3 and
TX4 are tied respectively. Refer to Application Note AN35 for SP3T
The Moisture Sensitivity Level rating for the
5x5 mm QFN package is MSL3.
©2012-2022 pSemi Corporation All rights reserved.
Page 4 of 12
Document No. DOC-13014-6 │ UltraCMOS® RFIC Solutions
PE42851
Product Specification
Typical Performance Data @ +25 °C and VDD = 3.4V, unless otherwise specified
Figure 5. Insertion Loss vs. Temp (TX)
Figure 6. Insertion Loss vs. VDD (TX)
Figure 7. Insertion Loss vs. Temp
(RX, Un-Attenuated)
Figure 8. Insertion Loss vs. VDD
(RX, Un-Attenuated)
Figure 9. Insertion Loss vs. Temp
(RX, Attenuated)
Figure 10. Insertion Loss vs. VDD
(RX, Attenuated)
Document No. DOC-13014-6 │ www.psemi.com
©2012-2022 pSemi Corporation All rights reserved.
Page 5 of 12
PE42851
Product Specification
Typical Performance Data @ +25 °C and VDD = 3.4V, unless otherwise specified
Figure 11. Return Loss vs. Temp (ANT)
Figure 12. Return Loss vs. VDD (ANT)
Figure 13. Return Loss vs. Temp (TX)
Figure 14. Return Loss vs. VDD (TX)
Figure 15. Return Loss vs. Temp
(RX, Attenuated)
Figure 16. Return Loss vs. VDD
(RX, Attenuated)
©2012-2022 pSemi Corporation All rights reserved.
Page 6 of 12
Document No. DOC-13014-6 │ UltraCMOS® RFIC Solutions
PE42851
Product Specification
Typical Performance Data @ +25 °C and VDD = 3.4V, unless otherwise specified
Figure 17. Return Loss vs. Temp
(RX, Un-Attenuated)
Figure 18. Return Loss vs. VDD
(RX, Un-Attenuated)
Figure 19. Isolation vs. Temp (TX–TX)
Figure 20. Isolation vs. VDD (TX–TX)
Figure 21. Isolation vs. Temp (TX–RX)
Figure 22. Isolation vs. VDD (TX–RX)
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©2012-2022 pSemi Corporation All rights reserved.
Page 7 of 12
PE42851
Product Specification
Thermal Data
Though the insertion loss for this part is very low,
when handling high power RF signals, the junction
temperature rises significantly.
Table 6. Theta JC
Parameter
Theta JC (+85 °C)
Min
Typ
20
Max
Unit
C/W
VSWR conditions that present short circuit loads to
the part can cause significantly more power
dissipation than with proper matching.
Special consideration needs to be made in the
design of the PCB to properly dissipate the heat
away from the part and maintain the +85 °C
maximum case temperature. It is recommended to
use best design practices for high power QFN
packages: multi-layer PCBs with thermal vias in a
thermal pad soldered to the slug of the package.
Special care also needs to be made to alleviate
solder voiding under the part.
©2012-2022 pSemi Corporation All rights reserved.
Page 8 of 12
Document No. DOC-13014-6 │ UltraCMOS® RFIC Solutions
PE42851
Product Specification
Evaluation Kit
Figure 23. Evaluation Board Layouts
The PE42851 Evaluation Kit board was designed
to ease customer evaluation of the PE42851 RF
switch.
The evaluation board in Figure 23 was designed
to test the part in the 5T configuration. DC power
is supplied through J10, with VDD on pin 9, and
GND on the entire lower row of even numbered
pins. To evaluate a switch path, add or remove
jumpers on V1 (pin 3), V2 (pin 5), and V3
(pin 7) using Table 5 (adding a jumper pulls the
CMOS control pin low and removing it allows the
on-board pull-up resistor to set the CMOS control
pin high). Pins 11 and 13 of J10 are N/C.
The ANT port is connected through a 50Ω
transmission line via the top SMA connector, J1.
RX and TX paths are also connected through 50Ω
transmission lines via SMA connectors. A
50Ω through transmission line is available via
SMA connectors J8 and J9. This transmission line
can be used to estimate the loss of the PCB over
the environmental conditions being evaluated. An
open-ended 50Ω transmission line is also provided
at J7 for calibration if needed.
Narrow trace widths are used near each part to
improve impedance matching.
Document No. DOC-13014-6 │ www.psemi.com
PRT-50283
©2012-2022 pSemi Corporation All rights reserved.
Page 9 of 12
PE42851
Product Specification
Figure 24. Evaluation Board Schematic
DOC-13027
Notes: 1. Use 101-0316-02 PCB
2. 32 mil Width, 10 mil Gaps, 28 mil Core, 4.3 Er, and 2.1 mil Cu
©2012-2022 pSemi Corporation All rights reserved.
Page 10 of 12
Document No. DOC-13014-6 │ UltraCMOS® RFIC Solutions
PE42851
Product Specification
Figure 25. Package Drawing
32-lead 5x5 mm QFN
A
0.10 C
(2X)
5.00
3.30±0.05
B
17
0.50
24
16
25
32
9
0.10 C
(2X)
8
1
3.50
3.35
DETAIL A
BOTTOM VIEW
TOP VIEW
Pin #1 Corner
5.20
3.35
3.30±0.05
0.24±0.05
(X32)
0.50
(X28)
0.575
(x32)
3.50
5.00
0.290
(x32)
0.375±0.05
(X32)
5.20
RECOMMENDED LAND PATTERN
0.85±0.05
DOC-01872
0.10 C
0.10
0.05
0.05 C
C A B
C
ALL FEATURES
SEATING PLANE
SIDE VIEW
0.203
Ref.
C
0.05
0.18
0.15
0.10
DETAIL A
Figure 26. Top Marking Specification
42851
YYWW
ZZZZZZ
= Pin 1 designator
YYWW = Date code, last two digits of the year and work week
ZZZZZZ = Six digits of the lot number
17-0085
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©2012-2022 pSemi Corporation All rights reserved.
Page 11 of 12
PE42851
Product Specification
Figure 27. Tape and Reel Drawing
Tape Feed Direction
Notes: 1. 10 sprocket hole pitch cumulative tolerance ±0.02.
2. Camber not to exceed 1 mm in 100 mm.
3. Material: PS + C.
4. Ao and Bo measured as indicated.
5. Ko measured from a plane on the inside bottom of the
pocket to the top surface of the carrier.
6. Pocket position relative to sprocket hole measured as
true position of pocket, not pocket hole.
Ao = 5.25 mm
Bo = 5.25 mm
Ko = 1.1 mm
Pin 1
Top of
Device
Device Orientation in Tape
Table 7. Ordering Information
Order Code
Description
Package
Shipping Method
PE42851B-X
PE42851 SP5T RF switch
Green 32-lead 5 × 5 mm QFN
500 units / T&R
EK42851-04
PE42851 Evaluation kit
Evaluation kit
1 / Box
Sales Contact and Information
For sales and contact information please visit www.psemi.com.
©2012-2022 pSemi Corporation All rights reserved.
Page 12 of 12
Document No. DOC-13014-6 │ UltraCMOS® RFIC Solutions