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PE42742
Product Specification
Table 6. Truth Table
Typical Applications
V DD
OFF
ON
ON
ON
ON
C1 (pin 17)
Low
Low
Low
High
High
C2 (pin 16)
Low
Low
High
Low
High
RFC – RF1
ON
ON
OFF
OFF
ON
RFC – RF2
OFF
OFF
ON
ON
OFF
The PE42742 provides the high isolation required
by FCC part 15.115 regulation between the
television antenna and the cable plant. The
advantage of the PE42742 is that device
isolation / thru performance is maintained when
power is removed. This unique feature makes the
PE42742 ideal for set-top box and VCR
applications. The PE42742 supports signal flow
Note: A versatile logic table has been established to allow either C1 or C2 act
as a single pin control and in either polarity.
Figure 4. Typical Application (1 of 4)
Antenna Input
from RFC to RF1 and RF2 termination in the
unpowered state; similar to the powered state with
C1=C2 (both high or low).
80dB 54 – 216MHz
60dB 216 – 550MHz
55dB 550 – 806MHz
PE42742
SPDT
DTV-Tuner
CATV Input
Figure 5. Typical Application (2 of 4)
TV Set / Cable Set-top Box
PE42742 SPDT
Tuner
CATV Input
75 ?
OFF – Terminated
Figure 6. Typical Application (3 of 4)
Antenna Input
Dual Tuner DTV / DVR / Set-top Box
80dB 54 – 216MHz
60dB 216 – 550MHz
55dB 550 – 806MHz
Power
Splitter
PE42742
SPDT
DTV Tuner
CATV Input
Power
Splitter
PE42742
SPDT
DTV-Tuner
Figure 7. Typical Application (4 of 4)
PVR/VCR/Game Box
Antenna/Cable
Input
RF
Splitter
Tuner/
Modulator
PE42742
SPDT
Television
OFF – Pass Through
?2006-2012 Peregrine Semiconductor Corp. All rights reserved.
Document No. 70-0203-07 │ UltraCMOS? RFIC Solutions
Page 4 of 10
Logo updated under non-rev change. Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com
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