Marconi Caswell Limited, Caswell, Towcester, Northamptonshire, NN12 8EQ
Telephone: + 44 (0) 1327 350581 Fax: + 44 (0) 1327 356775 Website: www.caswelltechnology.com
Caswell Technology is the trading name of Marconi Caswell Limited which is a wholly owned subsidiary of Marconi plc
The data and product specifications are subject to change without notice. These devices should not be used for device qualification and production without prior notice to MCL.
463/SM/00141/200 Iss 1/2 A Marconi company
P35-4245-3
GaAs MMIC DPDT REFLECTIVE
SWITCH, DC - 2GHz
Features
• Broadband performance
• Low insertion loss; 0.7dB typ at 1GHz
• Ultra low DC power consumption
• Fast switching speed; 3ns typical
• SO14 surface mount package
Description
The P35-4245-3 is a high performance Gallium Arsenide double pole double throw RF switch. It is
suitable for use in broadband communications and instrumentation applications. A short circuit
reflective termination is presented at the isolated output of the switch. The switch is controlled by the
application of complimentary 0V/-5V or 0/-8V signals to the control lines in accordance with the truth
table below.
This die is fabricated using MCL's 0.5µm gate length MESFET process (S20) and is fully protected using
Silicon Nitride passivation for excellent performance and reliability. This device is packaged in a low-
cost SOIC14 surface-mount plastic package.
Electrical Performance
Ambient temperature = 22±3 °C , ZO = 50Ω, Control voltages = 0V/-5V unless otherwise specified
Parameter Conditions Min Typ Max Units
Insertion Loss1DC - 1GHz
1 - 2GHz
-
-
0.7
0.9
0.9
1.1
dB
dB
Isolation1DC - 1GHz
1 - 2GHz
26
23
32
29
-
-
dB
dB
Input Return Loss2DC - 1GHz
1 - 2GHz
18
10
30
25
-
-
dB
dB
Output Return Loss2DC - 1GHz
1 - 2GHz
18
10
30
25
-
-
dB
dB
1dB power compression point30/-5V Control; 50MHz
0/-5V Control; 0.5 - 2GHz
0/-8V Control; 50MHz
0/-8V Control; 0.5 - 2GHz
19
22.5
20
29
19.5
23
21
30
-
-
-
-
dBm
dBm
dBm
dBm
Switching Speed 50% Control to 10%90%RF -3-ns
Notes
1. Insertion loss and isolation refer to each pole of the switch.
2. Return Loss measured in low loss switch state.
3. Input power at which insertion loss compresses by 1dB.
Marconi Caswell Limited, Caswell, Towcester, Northamptonshire, NN12 8EQ
Telephone: + 44 (0) 1327 350581 Fax: + 44 (0) 1327 356775 Website: www.caswelltechnology.com
Caswell Technology is the trading name of Marconi Caswell Limited which is a wholly owned subsidiary of Marconi plc
The data and product specifications are subject to change without notice. These devices should not be used for device qualification and production without prior notice to MCL.
463/SM/00141/200 Iss 1/2 A Marconi company
P35-4245-3
Typical Performance at 22° C
Insertion Loss
0.0
0.5
1.0
1.5
2.0 00.5 11.5 2
Frequency (GHz)
Insertion Loss (dB)
Isolation
0
30
60
90 00.5 11.5 2
Frequency (GHz)
Isolation (dB)
Input Return Loss
0
10
20
30
40 00.5 11.5 2
Frequency (GHz)
Return Loss (dB)
Output Return Loss
0
10
20
30
40 00.5 11.5 2
Frequency (GHz)
Return Loss (dB)
Absolute Maximum Ratings
Max control voltage -8V
Max I/P power +30 dBm
Operating temperature -40°C to +85°C
Storage temperature -65°C to +150°C
Marconi Caswell Limited, Caswell, Towcester, Northamptonshire, NN12 8EQ
Telephone: + 44 (0) 1327 350581 Fax: + 44 (0) 1327 356775 Website: www.caswelltechnology.com
Caswell Technology is the trading name of Marconi Caswell Limited which is a wholly owned subsidiary of Marconi plc
The data and product specifications are subject to change without notice. These devices should not be used for device qualification and production without prior notice to MCL.
463/SM/00141/200 Iss 1/2 A Marconi company
P35-4245-3
Package Outline Electrical Schematic
Switching Schematic
Package Pin Out
Switching Truth Table
Ordering Information
P35-4245-3
ABRF IN-RF1
RF3-RF OUT
RF IN-RF 2
RF4-RF OUT
0V -5V Low Loss Isolated
-5V 0V Isolated Low Loss
Pin Function Pin Function
1RF IN 8RF OUT
2 Ground 9 Ground
3RF2 10 RF3
4Control B 11 Control A
5RF4 12 RF1
6 Ground 13 Ground
7 Ground 14 Ground
