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to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON
Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON
Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA
Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended
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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
March 2014
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA5147 • FSA4157A Rev. 1.1.1
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
FSA4157, FSA4157A
Low-Voltage, 1 SPDT Analog Switch
Features
FSA4157A Features Lower ICC when the S Input is
Lower Than VCC
Maximum 1.15 On Resistance (RON) at 4.5 V VCC
0.3 Maximum RON Flatness at 4.5 V VCC
Space-Saving 6-lead, MicroPak™ and
SC70 6 Packages
Broad VCC Operating Range:
– FSA4157: 1.65 V to 5.5 V
– FSA4157A: 2.7 V to 5.5 V
Fast Turn-On and Turn-Off Time
Break-Before-Make Enable Circuitry
Over-Voltage Tolerant TT L-Compatible Control
Circuitry
Description
FSA4157 and FSA4157A are high performance Single
Pole/Double Throw (SPDT) analog switches. Both
devices feature ultra low RON of 1.15 maximum at
4.5 V VCC and operates over the wide VCC range of
1.65 V to 5.5 V for FSA4157, and 2.7 V to 5.5 V for
FSA4157A. The device is fabricated with sub-micron
CMOS technology to achieve fast switching speeds and
is designed for break-before-make operation. The select
input is TTL level compatible.
The FSA4157A features very low quiescent current even
when the control voltage is lower than the VCC supply.
This feature services the mobile handset applications
very well allowing for the direct interface with baseband
processor general purpose I/Os.
Ordering Information
Part Number Top
Mark Package Description Packing Method
FSA4157P6X A57 6-Lead SC70, EIAJ SC88, 1.25 mm Wide 3000 Units Tape and Reel
FSA4157L6X EG 6-Lead MicroPak,™ 1.0 mm Wide 5000 Units Tape and Reel
FSA4157AP6X B57 6-Lead SC70, EIAJ SC88, 1.25 mm Wide 3000 Units Tape and Reel
FSA4157AL6X EU 6-Lead MicroPak™, 1.0 mm W ide 5000 Units Tape and Reel
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 2
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
Pin Configurations
1 6
B
1
S
2 5
GND V
CC
3 4
B
0
A
(Top View)
1 6
B
1
S
2 5
GND
V
CC
3 4
B
0
A
(Top Through View)
Figure 1. SC70 Pin Assignments Figure 2. MicroPak™ Pin Assignments
Pin Definitions
Pin#
SC70 Pin#
MicroPak™ Name Description
1 6 B1 Data Ports
2 5 GND Ground
3 4 B0 Data Ports
4 3 A Data Ports
5 2 VCC Supply Voltage
6 1 S Control Input
Truth Table
Control Input (S) Function
Low B0 connected to A
High B1 connected to A
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 3
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol Parameter Min. Max. Unit
VCC Supply Voltage -0.5 6.0 V
VS DC Switch Voltage(1) -0.5 VCC + 0.5 V
VIN DC Input Voltage(1) -0.5 6.0 V
IIK DC Input Diode Current -50 mA
ISW Switch Current 200 mA
ISWPEAK Peak Switch Current (Pulse at 1 ms duration, <10% Duty Cycle) 400 mA
PD Power Dissipation at 85°C SC70
180 mW
MicroPak™
TSTG Storage Temperature Range -65 +150 °C
TJ Maximum Junction Temperature +150 °C
TL Lead Temperature (Soldering, 10 seconds) +260 °C
ESD Electrostatic Discharge Capability Human Body Model,
JESD22-A114 (FSA4157A) 7500 V
Note:
1. Input and output negative ratings may be exceeded if input and output diode current ratings are observed.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol Parameter Min. Max. Unit
VCC Supply Voltage FSA4157 1.65 5.50
V
FSA4157A 2.7 5.5
VCNTRL Control Input Voltage(2) 0 VCC V
VSW Switch Input Voltage 0 VCC V
TA Operating Temperature -40 +85 °C
JA Thermal Resistance in Still Air SC70 350
°C/W
MicroPak™ (Estimated) 330
Note:
2. Control input must be held HIGH or LOW and it must not float.
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 4
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
DC Electrical Characteristics
Typical values are at 25°C unless otherwise specified.
Symbol Parameter Conditions VCC(V)
Ambient Temperature
Unit -25° -40 to +85°C
Min. Typ. Max. Min. Max.
VIH Input Voltage High FSA4157 Only 1.8 to 2.7
1.0 V
2.7 to 3.6 2.0
4.5 to 5.5 2.4
VIL Input Voltage Low
FSA4157 Only 1.8 to 2.7
0.4
V
FSA4157A Only 2.7 to 3.6 0.4
2.7 to 3.6 0.6
4.5 to 5.5 0.8
IIN Control Input
Leakage VIN=0 V to VCC 2.7 to 3.6
-1.0 1.0 µA
4.5 to 5.5 -1.0 1.0
INO(OFF),
INC(OFF)
Off Leakage
Current of Port B0
and B1
A=1 V, 4.5 V,
B0 or B1=4.5, 1 V 5.5 ±2 -20 20 nA
IA(ON) On Leakage
Current of Port A
A=1 V, 4.5v, B0 or
B1=4.5, 1 V,4.5 V or
Floating 5.5 ±4 -40 40 nA
RON Switch On
Resistance
IOUT=100 mA,
B0 or B1=1.5 V 2.7 2.6 4.0 4.3
IOUT=100mA,
B0 or B1=3.5V 4.5 0.95 1.15 1.30
RON On Resistance
Matching Between
Channels(4)
IOUT=100 mA,
B0 or B1=1.5 V 4.5 0.06 0.12 0.15
RFLAT(ON) On Resistance
Flatness(4)
IOUT=100 mA, B0 or
BI =0 V, 0.75 V,1.5 V 2.7 1.4
IOUT=100 mA,
B0 or BI =0 V, 1 V,
2 V 4.5 0.2 0.3 0.4
ICC Quiescent Supply
Current VIN=0 V or VCC,
IOUT=0 V 3.6 0.1 0.5 1.0 µA
5.5 0.1 0.5 1.0
ICC Increase in ICC per
Input
One Input at 2.7 V,
others at VCC or
GND
(FSA4157A Only)
4.3 0.2 10.0 µA
Notes:
3. Measured by the voltage drop between the A and B pins at the indicated current through the switch. On
resistance is determined by the lower of the voltage on the two (A or B ports).
4. RON = RON max – RON min measured at identical VCC, temperature, and voltage.
5. Flatness is defined as the difference between the maximum and minimum value of on resistance over the
specified range of conditions.
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 5
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
AC Electrical Characteristics
Typical values are at 25°C unless otherwise specified.
Symbol Parameter Conditions VCC(V)
Ambient Temperature Unit Figure
-25° -40 to +85°C
Min. Typ. Max. Min. Max.
tON Turn-On
Time
B0 or B1=1.5 V,
RL=50 , CL=35 pF
(FSA4157A Only) 2.7 to 3.6 60 65
ns Figure 8
B0 or B1=1.5V,
RL=50, CL=35pF 2.7 to 3.6 50 60
B0 or B1=1.5 V,
RL=50 , CL=35pF 4.5 to 5.5 35 40
tOFF Turn-Off
Time
B0 or B1=1.5 V,
RL=50 , CL=35 pF 2.7 to 3.6 20 30 ns Figure 8
B0 or B1=1.5 V,
RL=50 , CL=35 pF 4.5 to 5.5 15 20
tBBM Break-
Before-
Make Time
FSA4157 2.7 to 3.6 ns Figure 9 4.5 to 5.5 20
FSA4157A Only 4.5 to 5.5 25
Q Charge
Injection CL=1.0 nF,
VGE=0 V, RGEN=0
2.7 to 3.6 10 pC Figure 11
4.5 to 5.5 20
OIRR Off Isolation
f=1 MHz, RL=50 2.7 to 3.6 -70 dB Figure 10
4.5 to 5.5 -70
Xtalk Crosstalk f=1 MHz, RL=50 2.7 to 3.6 -70 dB Figure 10
4.5 to 5.5 -70
BW -3db
Bandwidth RL=50 2.7 to 3.6 300 MHz Figure 13
4.5 to 5.5 300
THD Total
Harmon
Distortion RL=600 VIN=0.5,
f=20 Hz to 20 kHz
2.7 to 3.6 0.002 % Figure 14
4.5 to 5.5 0.002
Capacitance
Symbol Parameter Conditions VCC (V) Ambient Temperature
-25° Unit Figure
Min. Typ. Max.
CIN Control Pin Input
Capacitance f=1 MHz 0 3.5 pF Figure 12
COFF B Port Off Capacitance f=1 MHz 4.5 12.0 pF Figure 12
CON On Capacitance f=1 MHz 4.5 40.0 pF Figure 12
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 6
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
Typical Performance Characteristics
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-1201 10 100 1,000
Off Isolation (dB)
Frequency (MHz)
Figure 3. Off Isolation, VCC = 2.7 V to 5.5 V
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-1201 10 100 1,000
Off Isolation (dB)
Frequency (MHz)
Figure 4. Crosstalk, VCC = 2.7 V to 5.5 V
0
-1
-2
-3
-4
-5
-6
-7
-81 10 100 1,000
Gain (dB)
Frequency (MHz)
CL = 0pF, VCC = 2.7V
Figure 5. Bandwidth, VCC = 2.7 V to 5.5 V
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 7
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
Typical Performance Characteristics (Continued)
2.500
–40°C
V
IN
= 1.500V
R
ON
= 2.032
2.160
1.819
1.479
1.139
0.799
-0.600 0.000 0.600 1.200
V
IN
(V)
R
ON
()
1.800 2.400 3.000
25°C
V
IN
= 1.500V
R
ON
= 2.161
85°C
V
IN
= 1.500V
R
ON
= 2.322
Figure 6. RON Switch On Resistance, ION = 100 mA, VCC = 2.7
1.500
–40°C
V
IN
= 3.500V
R
ON
= 804.300m
1.327
1.154
0.981
0.808
0.635
-0.960 0.000 0.960 1.920
V
IN
(V)
R
ON
(W)
2.880 3.840 4.800
25°C
V
IN
= 3.500V
R
ON
= 999.800m
85°C
V
IN
= 3.500V
R
ON
= 1.182
Figure 7. RON Switch On Resistance, ION = 100 mA, VCC = 4.5 V
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 8
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
AC Loadings and Waveforms
t
OFF
t
r
< 2.5ns
t
f
< 2.5ns
0.9 x V
OUT
0.9 x V
OUT
R
L
50Ω
C
L
35Ω
50%
GND
V
INH
V
INL
Control
Input
Switch
Output o
V
OUT
V
OUT
I
ON
V
CC
V
B0
V
B1
B
0
or B
1
C
L
Includes Fixture and Stray Capacitance Logic Input Waveforms Inverted for Switches
that have the Opposite Logic Sense
A
S
or
Figure 8. Turn On / Off Timing
S
GND
C
ontrol
I
n
p
ut
Control
Input
CL includes fixture and stray capacitance
VBn
B0
B
1
A
VOUT
VINH
VINL
TBB-M
VCC
0.9 x VOUT
50%
RL
50Ω
CL
35Ω
VOUT
Control
Input
Figure 9. Break Before Make Timing
GND
FSA4157
OFF-ISOLATION = 20log
Network
Analyzer
MEAS REF
A
V
OUT
V
IN
ON-LOSS = 20log V
OUT
V
IN
CROSSTALK = 20log V
OUT
V
IN
B
O
B
B
B
1
S
V
CC
10nF
0 or V
CC
V
CC
50
50 50Ω
50Ω50Ω
V
OUT
V
IN
B
O
Ω
Figure 10. Off Isolation and Crosstalk
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.1.1 9
FSA4157, FSA4157A — Low-Voltage, 1 SPDT Analog Switch
AC Loadings and Waveforms (Continued)
GND
A
B
0
or
B
1
R
GEN
V
GE
+
S
V
CC
V
OUT
ΔV
OUT
Q = (ΔV
OUT
)(C
L
)
IN
IN
ON
ON
OFF
OFF
OFF
OFF
C
L
Co n t r o l
Input
V
OUT
Figure 11. Charge Injection
GND
A
S
V
CC
V
INL
or
V
INH
f = 1MHz
Capacitance
Meter
10nF
B
0
or
B
1
Figure 12. On / Off Capacitance Measurement Setup
GND
A
BN
V
CC
S
10nF
Analyzer
Signal
Generator
0dBm
Logic Input
0V or V
CC
50Ω
Figure 13. Bandw idth
GND
A
BNV
CC
S
10nF
Analyzer
Signal
Generator
Logic Input
0V or V
CC
V
IN
R
L
Figure 14. Harmonic Distortion
www.onsemi.com
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ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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