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參數資料
型號: 4257-51
廠商: PEREGRINE SEMICONDUCTOR CORP
元件分類: 開關
英文描述: 50 ?SPDT Absorptive UltraCMOS?DC ?3.0 GHz RF Switch
中文描述: 0 MHz - 3000 MHz RF/MICROWAVE SGL POLE DOUBLE THROW SWITCH, 1.4 dB INSERTION LOSS
封裝: 4 X 4 MM, GREEN, QFN-20
文件頁數: 2/7頁
文件大小: 298K
代理商: 4257-51
Product Specification
PE4257
Page 2 of 7
Document No. 70-0166-06
│ UltraCMOS RFIC Solutions
2004-2009 Peregrine Semiconductor Corp. All rights reserved.
4x4mm 20-Lead QFN
GND
15
14
13
12
11
3
4
5
2
1
17
16
18
19
20
9
10
8
7
6
CTR
L
2
GN
D
GN
D
GN
D
GN
D
GN
D
RFC
VDD
CTR
L
1
VS
S/GND
GND
RF2
GND, RF2 Term.
GND
GND, RF1 Term.
RF1
GND
No.
Name
Description
1
GND
RF Ground
2
GND
RF Ground
31
RF1
RF I/O
4
GND
RF Ground
5
GND
RF Ground
6
GND
RF Ground
7
GND
RF Ground
81
RFC
RF Common
9
GND
RF Ground
10
GND
RF Ground
11
GND
RF Ground
12
GND
RF Ground
131
RF2
RF I/O
14
GND
RF Ground
15
GND
RF Ground
162
CTRL2
Control 2
172
CTRL1
Control 1
183
VSS / GND
Negative Supply Option
19
GND
Digital Ground
20
VDD
Supply
Pad
GND
RF Ground Pad
Table 2. Pin Descriptions
Table 3. Absolute Maximum Ratings
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.
Table 4. Operating Ranges @ 25 °C
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 VDC 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 VSS (-3 V) to bypass and
disable internal -3 V supply generator. See paragraph
“Switching Frequency.”
Symbol
Parameter/Condition
Min
Max
Units
VDD
Power supply voltage
-0.3
4.0
V
VI
Voltage on any DC input
-0.3
VDD + 0.3
V
PRF
RF power on RFC, RF1, RF2
On Port/ Terminated Port
33/24
dBm
TST
Storage temperature
-65
+150
°C
TOP
Operating temperature
-40
+85
°C
VESD
ESD voltage
(Human Body Model)
1000
V
Parameter
Min
Typ
Max
Unit
VDD Power Supply
2.7
3.0
3.3
V
IDD Power Supply Current
(VDD = 3V, VCNTL = 3V)
8
20
A
Control Voltage High
0.70 VDD
V
Control Voltage Low
0
0.30 VDD
V
Switching Frequency
The PE4257 has a maximum 25 kHz switching rate
when the internal negative voltage generator is used
(pin 18=GND). The rate at which the PE4257 can be
switched is only limited to the switching time if an
external -3 V supply is provided at (pin18=VSS ).
Figure 3. Pin Configuration (Top View)
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.
Table 5. Truth Table
CTRL1
CTRL2
RFC – RF1
RFC – RF2
Low
OFF
Low
High
OFF
ON
High
Low
ON
OFF
High
N/A1
Notes: 1. The operation of the PE4257 is not supported or
characterized in the C1=VDD and C2=VDD state.
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