March 2012
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA5147 • FSA4157A Rev. 1.0.7
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch
FSA4157, FSA4157A
Low-Voltage, 1Ω SPDT Analog Switch
Features
FSA4157A Features Lower ICC when the S Input is
Lower Than VCC
Maximum 1.15Ω On Resistance (RON) at 4.5V VCC
0.3Ω Maximum RON Flatness at 4.5V VCC
Space-Saving 6-lead, MicroPak™ and
SC70 6 Packages
Broad VCC Operating Range:
– FSA4157: 1.65V to 5.5V
– FSA4157A: 2.7V to 5.5V
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 1.15Ω maximum at 4.5V
VCC and operates over the wide VCC range of 1.65V to
5.5V for FSA4157, and 2.7V to 5.5V 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, 1.25mm Wide 3000 Units Tape and Reel
FSA4157L6X EG 6-Lead MicroPak,™ 1.0mm Wide 5000 Units Tape and Reel
FSA4157AP6X B57 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3000 Units Tape and Reel
FSA4157AL6X EU 6-Lead MicroPak™, 1. 0mm Wide 5000 Units Tape and Reel
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 2
FSA4157, FSA4157A — Low-Voltage, 1Ω 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. 1.0.7 3
FSA4157, FSA4157A — Low-Voltage, 1Ω 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 1ms 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
θJA 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. 1.0.7 4
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch
DC Electrical Characteristics
Typical values are at 25°C unless otherwise specified.
Symbol Parameter Conditions VCC(V)
Ambient Temperature
Units-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=0V 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=1V, 4.5v,
B0 or B1=4.5, 1V 5.5 -2 2 -20 20 nA
IA(ON) On Leakage
Current of Port A
A=1V, 4.5v, B0 or
B1=4.5, 1V,4.5V or
Floating 5.5 -4 4 -40 40 nA
RON Switch On
Resistance
IOUT=100mA,
B0 or B1=1.5V 2.7 2.6 4.0 4.3
Ω
IOUT=100mA,
B0 or B1=3.5V 4.5 0.95 1.15 1.30
ΔRON On Resistance
Matching Between
Channels(4)
IOUT=100mA,
B0 or B1=1.5V 4.5 0.06 0.12 0.15
Ω
RFLAT(ON) On Resistance
Flatness(4)
IOUT=100mA, B0 or
BI =0V, 0.75V,1.5V 2.7 1.4
Ω
IOUT=100mA,
B0 or BI =0V, 1V, 2V 4.5 0.2 0.3 0.4
ICC Quiescent Supply
Current VIN=0V or VCC,
IOUT=0V 3.6 0.1 0.5 1.0 µA
5.5 0.1 0.5 1.0
ΔICC Increase in ICC per
Input
One Input at 2.7V,
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. ΔRON = 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. 1.0.7 5
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch
AC Electrical Characteristics
Typical values are at 25°C unless otherwise specified.
Symbol Parameter Conditions VCC(V)
Ambient Temperature Units Figure
-25° -40 to +85°C
Min. Typ. Max. Min. Max.
tON Turn-On
Time
B0 or B1=1.5V,
RL=50Ω, CL=35pF
(FSA4157A Only) 2.7 to 3.6 60 65
ns Figure 8
B0 or B1=1.5V,
RL=50Ω, CL=35pF 2.7 to 3.6 50 60
B0 or B1=1.5V,
RL=50Ω, CL=35pF 4.5 to 5.5 35 40
tOFF Turn-Off
Time
B0 or B1=1.5V,
RL=50Ω, CL=35pF 2.7 to 3.6 20 30 ns Figure 8
B0 or B1=1.5V,
RL=50Ω, CL=35pF 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=1.0nF,
VGE=0V, RGEN=0Ω 2.7 to 3.6 10 pC Figure
11
4.5 to 5.5 20
OIRR Off Isolation f=1MHz, RL=50Ω 2.7 to 3.6 -70 dB Figure
10
4.5 to 5.5 -70
Xtalk Crosstalk f=1MHz, RL=50Ω 2.7 to 3.6 -70 dB Figure
10
4.5 to 5.5 -70
BW -3db
Bandwidth RL=50Ω 2.7 to 3.6 300 MHz Figure
13
4.5 to 5.5 300
THD Total
Harmon
Distortion
RL=600Ω, VIN=0.5
,
f=20Hz to 20kHz
2.7 to 3.6 0.002 % Figure
14
4.5 to 5.5 0.002
Capacitance
Symbol Parameter Condition
s VCC (V) Ambient Temperature
-25° Units Figure
Min. Typ. Max.
CIN Control Pin Input
Capacitance f=1MHz 0 3.5 pF
Figure
12
COFF B Port Off Capacitance f=1MHz 4.5 12.0 pF
Figure
12
CON On Capacitance f=1MHz 4.5 40.0 pF
Figure
12
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 6
FSA4157, FSA4157A — Low-Voltage, 1Ω 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 = 2.7V to 5.5V
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 = 2.7V to 5.5V
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 = 2.7V to 5.5V
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 7
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch
Typical Performance Characteristics (Continued)
2.500
–40°C
V
IN
= 1.500V
R
ON
= 2.032Ω
2.160
1.819
1.479
1.139
0.799
-0.600 0.000 0.600 1.200
V
IN
(V)
R
ON
(
Ω
)
1.800 2.400 3.000
25°C
V
IN
= 1.500V
R
ON
= 2.161Ω
85°C
V
IN
= 1.500V
R
ON
= 2.322Ω
Figure 6. RON Switch On Resistance, ION = 100mA, VCC = 2.7
1.500
–40°C
V
IN
= 3.500V
R
ON
= 804.300mΩ
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
= 999.800mΩ
85°C
V
IN
= 3.500V
R
ON
= 1.182Ω
Figure 7. RON Switch On Resistance, ION = 100mA, VCC = 4.5V
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 8
FSA4157, FSA4157A — Low-Voltage, 1Ω 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. 1.0.7 9
FSA4157, FSA4157A — Low-Voltage, 1Ω 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. Bandwidth
GND
A
BNV
CC
S
10nF
Analyzer
Signal
Generator
Logic Input
0V or V
CC
V
IN
R
L
Figure 14. Harmonic Distortion
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 10
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch
Physical Dimensions
DETAIL A
SCALE: 60X
B
1.90
2.00±0.20
0.50 MIN
1.00
0.80
1.10
0.80
0.10 C
0.25
0.10
0.46
0.26
0.20
GAGE
PLANE (R0.10)
30°
SEATING
PLANE
C0.10
0.00
NOTES: UNLESS OTHERWISE SPECIFIED
A) THIS PACKAGE CONFORMS TO EIAJ
SC-88, 1996.
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE BURRS
OR MOLD FLASH.
D) DRAWING FILENAME: MKT-MAA06AREV6
2.10±0.30
0.10 AB
0.65
1.30
(0.25) 0.30
0.15
1
1.25±0.10
3
1.30 0.40 MIN
SEE DETAIL A
LAND PATTERN RECOMMENDATION
6
A
4
C
0.65 L
SYMM
PIN ONE
Figure 15. 6-Lead, SC70, EIAJ SC88 1.25mm Wide Package
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
Tape and Reel Specifications
Please visit Fairchild Semiconductor’s online packaging area for the most recent tape and reel specifications:
http://www.fairchildsemi.com/products/analog/pdf/sc70-6_tr.pdf.
Package Designator Tape Section Cavity Number Cavity Status Cover Type Status
P6X Leader (Start End) 125 (Typical) Empty Sealed
Carrier 3000 Filled Sealed
Trailer (Hub End) 75 (Typical) Empty Sealed
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 11
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch
Physical Dimensions (Continued)
2. DIMENSIONS ARE IN MILLIMETERS
1. CONFORMS TO JEDEC STANDARD M0-252 VARIATION UAAD
4. FILENAME AND REVISION: MAC06AREV4
Notes:
3. DRAWING CONFORMS TO ASME Y14.5M-1994
TOP VIEW
RECOMMENED
LAND PATTERN
BOTTOM VIEW
1.45
1.00
A
B0.05 C
0.05 C
2X
2X
0.55MAX
0.05 C
(0.49)
(1)
(0.75)
(0.52)
(0.30)
6X
1X
6X
PIN 1
DETAIL A
0.075 X 45
CHAMFER
0.25
0.15
0.35
0.25
0.40
0.30
0.5
(0.05)
1.0
5X
DETAIL A
PIN 1 TERMINAL
0.40
0.30
0.45
0.35
0.10
0.00
0.10 CBA
0.05 C
C0.05 C
0.05
0.00
5X
5X
6X (0.13)
4X
6X
PIN 1 IDENTIFIER
(0.254)
5. PIN ONE IDENTIFIER IS 2X LENGTH OF ANY
5
OTHER LINE IN THE MARK CODE LAYOUT.
Figure 16. 6-Lead, Micropak™ 1.0mm Wid e Packag e
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the
warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
Tape and Reel Specifications
Please visit Fairchild Semiconductor’s online packaging area for the most recent tape and reel specifications:
http://www.fairchildsemi.com/products/logic/pdf/micropak_tr.pdf.
Package Designator Tape Section Cavity Number Cavity Status Cover Type Status
L6X Leader (Start End) 125 (Typical) Empty Sealed
Carrier 5000 Filled Sealed
Trailer (Hub End) 75 (Typical) Empty Sealed
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA4157 • FSA4157A Rev. 1.0.7 12
FSA4157, FSA4157A — Low-Voltage, 1Ω SPDT Analog Switch