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Document No. 70-0148-03 │ www.psemi.com ©2005 Peregrine Semiconductor Corp. All rights reserved.
RF1 RF2
CTRL
75 75
CMOS
Control
Driver
The PE4270 is a is a high-isolation Switch designed for CATV
applications, covering a broad frequency range from near DC
up to 3000 MHz. This single-supply SPST switch offers a
single-pin CMOS control interface with industry leading CTB
performance. It also provides low insertion loss, high isolation
and extremely low bias requirements while operating on a
single 3-volt supply. In a typical CATV application, the PE4270
provides for a cost effective and manufacturable solution vs.
mechanical relays.

The PE4270 is manufactured on Peregrine’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.
Product Specification
SPST CATV UltraCMOS™ Switch
DC - 3000 MHz
Product Description
Figure 1. Functional Diagram
PE4270
Features
• Integrated 0.25 watt terminations
• CTB performance of 90 dBc
• High isolation: 90 dB at 5 MHz, 63 dB
at 1000 MHz
• Low insertion loss: 0.5 dB at 50 MHz,
0.70 dB at 1000 MHz
• High input IP2: >80 dBm
• CMOS/TTL single-pin control
• Single +3-volt supply operation
• Extremely low bias: 8 µA @ 3 V
• Available in a 6-lead DFN package
Notes: 1. Device linearity will begin to degrade below 1 MHz.
2. Measured in a 50 Ω system.
3. Measured with a 1 ns risetime, 0/3 V pulse and 500 MHz bandwidth.
4. Note Absolute Maximum ratings in Table 3.
Table 1. Electrical Specifications @ +25 °C (Z
S
= Z
L
= 75 Ω )
Figure 2. Package Type
6-lead DFN
Parameter Condition Minimum Typical Maximum Units
Operating Frequency
1
DC 3000 MHz
Insertion Loss
DC – 50 MHz
1000 MHz

0.50
0.70
0.65
0.85
dB
Isolation
DC – 50 MHz
1000 MHz
85
60
90
63
dB
Return Loss
5 - 1000 MHz,
V
CNTL
= 3.0V
15 16 dB
1 dB Compression
2,4
1000 MHz 28 30 dBm
CTB / CSO
77 & 110 channels;
PO = 44 dBmV
-90 dBc
Input IP2
2
1000 MHz 80

dBm
Input IP3
2
1000 MHz 50

dBm
Video Feedthrough
3
15 mVpp
Switching Time 2 µS