Preliminary Specification
PE4274
Product Description
The PE4274 is an SPDT
UltraCMOS™
Switch designed for
Broadband applications such as CATV, DTV, Multi-Tuner
DVR (Digital Video Recorder), Set-top Box, PCTV and
Game Boxes. It offers high isolation and low insertion loss
in both a powered and a unique unpowered default state.
The PE4274 covers a broad frequency range from near DC
to beyond 2.2 GHz with a single positive supply and CMOS
control. The PE4274 provides a smaller, cost effective,
more reliable and manufacturable alternative to mechanical
relays in some set-top box applications.
The PE4274 is manufactured in Peregrine’s patented Ultra
Thin Silicon (UTSi®) CMOS process, offering the
performance of GaAs with the economy and integration of
conventional CMOS.
75Ω Terminated - 2.2 GHz SPDT
CATV UltraCMOS™ Switch
Featuring - Unpowered Operation
Features
•
Unpowered operational state
•
All-Off terminated state
•
CTB performance of 90dBc
•
High isolation 63 dB at 1 GHz
•
Low insertion loss: typically 0.5 dB at
5 MHz, 0.8 dB at 1 GHz
•
CMOS two-pin control
•
Single +3 volt supply operation
•
1 kV ESD
•
Low current consumption: 8
µA
Figure 1. Functional Diagram
Figure 2. Package Type
4x4mm 20 pin QFN
RFCommon
75
RF1
RF2
75
CMOS
Control
Driver
75
CTRL1 CTRL2
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Copyright © Peregrine Semiconductor Corp. 2005
Page 1 of 12
PE4274
Preliminary Specification
Table 1. Electrical Specifications @ +25 °C, V
DD
= +3 V
(Z
S
= Z
L
= 75
Ω)
Parameter
Operating Frequency
1
RF1-RFC Insertion Loss
(Powered / Unpowered)
5 MHz – 216 MHz
216 MHz – 550 MHz
550 MHz – 806 MHz
806 MHz – 2200 MHz
5 MHz – 216 MHz
216 MHz – 550 MHz
550 MHz – 806 MHz
806 MHz – 2200 MHz
5 MHz – 216 MHz
216 MHz – 550 MHz
550 MHz – 806 MHz
806 MHz – 2200 MHz
5 MHz – 216 MHz
216 MHz – 550 MHz
550 MHz – 806 MHz
806 MHz – 2200 MHz
5 MHz - 1000 MHz
5 MHz - 1000 MHz
1000 MHz
77 & 110 channels;
Power Out = 44 dBmV
50% CTRL to 10 / 90 RF
5 MHz - 1000 MHz
Condition
Minimum
5
Typical
Maximum
2200
Units
MHz
0.5 / 1.5
0.5 / 1.5
0.8 / 1.8
1.0 / 2.2
0.7
0.8
1.0
1.3
97 / 95
84 / 80
69 / 69
57 / 56
80 / 82
70 / 71
63 / 65
61 / 65
90 / 73
50 / 39
30 / 24
-90 / -77
2
15
dB
RF2-RFC Insertion Loss
dB
Isolation RF1 or RF2 to RFC
(Powered /RF2 Unpowered)
dB
Isolation RF1 to RF2
2
dB
Input IP2
3
(Powered/Unpowered)
Input IP3
3
(Powered/Unpowered)
Input 1dB Compression
3
(Powered/Unpowered)
CTB / CSO
(Powered/Unpowered)
Switching Time
Video Feedthrough
4
dBm
dBm
dBm
dBc
µs
mV
pp
Notes: 1. Device linearity will begin to degrade with input signals below 5 MHz.
2. Isolation at 216 MHz = 75 dB
3. Measured in a 50
Ω
system.
4. Measured with a 1 ns risetime, 0/3 V pulse and 500 MHz bandwidth
Copyright © Peregrine Semiconductor Corp. 2005
Page 2 of 12
File No. 70/0185-01A
│
UltraCMOS™ RFIC Solutions
PE4274
Preliminary Specification
Figure 3. Pin Configuration (Top View)
18 VSS/GND
VDD
19 GND
17 C1
16 C2
Table 3. Absolute Maximum Ratings
Symbol
V
DD
V
I
Parameter/Condition
Power supply voltage
Voltage on CTRL input
RF power on RFC, RF1, RF2
Terminated/Through
Storage temperature
Operating temperature
ESD voltage
(Human Body Model)
Min
-0.3
-0.3
Max
4.0
V
DD
+
0.3
24/33
Unit
V
V
dBm
°C
°C
V
20
GND
GND
RF1
GND, RF1 Term.
GND
1
GND
2
3
4
5
150
150
75
75
15 GND
14 GND
13
RF2
P
RF
T
ST
T
OP
V
ESD
-65
-40
1,000
+150
+85
12 GND, RF2 Term.
11 GND
GND
GND 10
Table 4. DC Electrical Specifications @ 25 °C
Parameter
V
DD
Power Supply
I
DD
Power Supply Current
6
7
8
RFC
GND
GND
9
Min
2.7
Typ
3.0
8
Max
3.3
Unit
V
µA
4x4mm 20-Lead QFN
Table 2. Pin Descriptions
No.
1
2
3
1
Name
GND
GND
RF1
GND
GND
GND
GND
RFC
GND
GND
GND
GND
RF2
GND
GND
C2
C1
VSS / GND
GND
VDD
GND
RF Ground
RF Ground
RF I/O
Description
(V
DD
= 3 V, V
CNTL
= 3 V)
Control Voltage High
Control Voltage Low
0.7 x
V
DD
0
V
DD
0.3 x
V
DD
V
V
4
5
6
7
8
1
9
10
11
12
13
1
14
15
16
2
17
2
18
3
RF Ground, RF1 Termination Resistor
RF Ground
RF Ground
RF Ground
RF Common
RF Ground
RF Ground
RF Ground
RF Ground, RF2 Termination Resistor
RF I/O
RF Ground
RF Ground
Control 2
Control 1
Negative Supply Option
Digital Ground
Supply
RF Ground Pad
Electrostatic Discharge (ESD) Precautions
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
exceeding the rating specified.
Latch-Up Avoidance
Unlike conventional CMOS devices, UltraCMOS™
devices are immune to latch-up.
Switching Frequency
The PE4274 has a maximum 25 kHz switching
rate when the internal negative voltage generator
is used (pin 18 = GND). The rate at which the
PE4274 can be switched is only limited to the
switching time if an external -3 V supply is
provided at (pin 18 = V
SS
).
19
20
Pad
Notes:
1. RF pins 3, 8, and 13 must be at 0 VDC. The RF pins do not
require DC blocking capacitors for proper operation if the 0 V DC
requirement is met.
2. Pins 16 and 17 are the CMOS controls that set the four operating
states.
3. Connect pin 18 to GND to enable the negative voltage generator.
Connect pin 18 to V
SS
(-3V) to bypass and disable internal -3V supply
generator. See “Switching Frequency”.
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Copyright © Peregrine Semiconductor Corp. 2005
Page 3 of 12
PE4274
Preliminary Specification
Table 5. Truth Table
V
DD
OFF
ON
ON
ON
ON
Notes:
1. The operation of the PE4274 is not supported or characterized in the C1 = High and C2 = High state.
C1
Low
Low
Low
High
High
C2
Low
Low
High
Low
High
RFC – RF1
ON
OFF
OFF
ON
N/A
1
RFC – RF2
OFF
OFF
ON
OFF
N/A
1
Figure 4. Typical Application Block Diagram
The PE4274 provides the high isolation
required by FCC part 15.115 regulation
between the television antenna and the cable
plant. The advantage of the PE4274 is that
device isolation / thru performance is
maintained when power is removed. This
Antenna Input
unique feature makes the PE4274 ideal for set-top
box and VCR applications.
The PE4274 supports signal flow from RFC to
RF1 and RF2 termination in the unpowered state;
similar to the powered state with C1=High,
C2=Low.
80dB 54 – 216MHz
60dB 216 – 550MHz
55dB 550 – 806MHz
PE4274
SPDT
DTV-Tuner
CATV Input
Antenna Input
Power
Splitter
Dual Tuner DTV / DVR / Set-top Box
PE4274
SPDT
DTV Tuner
80dB 54 – 216MHz
60dB 216 – 550MHz
55dB 550 – 806MHz
Power
Splitter
CATV Input
PE4274
SPDT
DTV-Tuner
Copyright © Peregrine Semiconductor Corp. 2005
Page 4 of 12
File No. 70/0185-01A
│
UltraCMOS™ RFIC Solutions
PE4274
Preliminary Specification
RF
Splitter
Antenna/Cable
Input
PVR/VCR/Game Box
RF1
PE4274
Tuner/
Modulator
SPDT
RF2
Television
OFF – Pass Through
TV Set / Cable Set-top Box
PE4274 SPDT
RF2
CATV Input
75W
OFF – Terminated
Tuner
Peregrine Semiconductor Corp. ®
│
http://www.psemi.com
Copyright © Peregrine Semiconductor Corp. 2005
Page 5 of 12
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