FSA2156 Low-Voltage SPST 0.4Ω Analog Switch
June 2006
FSA2156 Low-Voltage SPST 0.4Ω Analog Switch
Features
Maximum 0.7Ω ON resistance (R
ON
) for +2.7V supply
0.25Ω max R
ON
flatness for +2.7V supply
Space-saving Pb-free MicroPak
TM
and SC70
packaging
Broad Vcc operating range: 1.65 to 4.3V
Fast turn-on and turn-off times
Over-voltage tolerant TTL-compatible control input
Suitable for 2 UL USB2.0 applications (200mA)
Low I
CCT
current over an expanded control input range
Description
The FSA2156 is a high-performance Single-Pole Single-
Throw (SPST) analog switch that features ultra low R
ON
of 0.4Ω (typ.) at 2.7V V
CC
. The FSA2156 operates over
the wide VCC range of 1.65V to 4.3V and is fabricated
with sub-micron CMOS technology to achieve fast
switching speeds. The select input is TTL-level
compatible.
FSA2156 features very low quiescent current even when
the control voltage is lower than the VCC supply. This
feature facilitates longer battery life in mobile handset
applications and allows for the direct interface with
baseband-processor, general-purpose I/Os.
Ordering Information
Product
Code Top Package
Part Number
Mark
Number Pb-Free
FSA2156P6
FSA2156P6X
FSA2156L6X
2156
2156
FY
MAA06A
MAA06A
MAC06A
Yes
Yes
Yes
Package Description
6-lead SC70, EIAJ SC88,
1.25mm Wide
6-lead SC70, EIAJ SC88,
1.25mm Wide
6-lead MicroPak, 1.0mm Wide
Packing Method
250 Units on Tape and Reel
3k Units on Tape and Reel
5k Units on Tape and Reel
Pb-free package per JEDEC J-STD-020B.
Analog Symbol
FSA2156
A
1
6
FSA2156
V
CC
V
CC 1
6
A
GND
2
5
NC
NC
2
5
B
B
3
4
Sel
Sel
3
4
GND
Pin Assignment for SC70
(Top View)
Pin Assignment for MicroPak
(Top Through View)
© 2006 Fairchild Semiconductor Corporation
FSA2156 Rev. 1.0.2
www.fairchildsemi.com
FSA2156 Low-Voltage SPST 0.4Ω Analog Switch
Truth Table
Control Input (S)
L (LOW Logic Level)
H (HIGH Logic Level)
Pin Descriptions
Function
Name
A, B
Sel
Function
Switch I/O Data Ports
Control Input
Switch Open (OFF)
Switch Closed (ON)
Absolute Maximum Ratings
(1)
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The
device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables
are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the
conditions for actual device operation.
Symbol
Vcc
V
SW
V
CNTRL
Input Clamp Diode Current
Switch I/O Current
(continuous)
Peak Switch Current
Power Dissipation @ 85ºC
T
STG
T
J
T
L
Parameter
Supply Voltage
Switch I/O Voltage
(2)
Control Input Voltage
(2)
Input Clamp Diode Current
Switch I/O Current (continuous)
Pulsed at 1mS Duration,
<10% Duty Cycle
SC70 6L Package
MicroPak 6L Package
Storage Temperature Range
Maximum Junction Temperature
Lead Temperature
(Soldering, 10 seconds)
All Pins
I/O to GND
Charge Discharge Model
Min.
-0.5V
-0.5V
-0.5V
± 50mA
Max.
4.6V
Vcc+ 0.3V
4.6V
± 50mA
500mA
500mA
180mW
180mW
Unit
V
V
V
mA
mA
mA
mW
mW
°C
°C
°C
kV
kV
kV
-65°C
+150°C
+150°C
+260°C
2kV
8kV
2kV
ESD Human Body Model
Notes
1. Absolute maximum ratings are DC values for which the device may be damaged or have its useful life impaired. The data sheet
specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature,
and input/output loading variables. Fairchild does not recommend operation outside datasheet specifications.
2. The input and output negative ratings may be exceeded if the input and output diode current ratings are observed.
Recommended Operating Conditions
(3)
Symbol
Vcc
V
CNTRL
V
SW
Switch I/O Load Current
Operating Temperature
Thermal Resistance
θ
JA
(free air)
Parameter
Supply Voltage
Control Input Voltage
(4)
Switch I/O Voltage
Switch I/O Load Current
Operating Temperature
SC70 6L package
MicroPak 6L package
Min.
1.65V
0V
0V
Max.
4.3V
Vcc
Vcc
350mA
Unit
V
V
V
mA
ºC
°C/W
°C/W
-40ºC
85ºC
350
°C/W
310
°C/W
3. Recommended Operating conditions are specified to ensure optimal performance to the datasheet specifications.
It is recommended not to exceed them or design to absolute maximum ratings.
4. Control input must be held HIGH or LOW; it must not float.
© 2006 Fairchild Semiconductor Corporation
FSA2156 Rev. 1.0.2
www.fairchildsemi.com
2
FSA2156 Low-Voltage SPST 0.4Ω Analog Switch
DC Electrical Characteristics
All typical values are @25°C unless otherwise specified.
Symbol
Parameter
Conditions
V
CC
(V)
T
A
=+25ºC
T
A
=-
40ºC to +85ºC
Units
Min.
V
IH
Input Voltage
High
3.6 - 4.3
2.7 - 3.6
2.3 - 2.7
1.65 - 1.95
3.6 - 4.3
2.7 - 3.6
2.3 - 2.7
1.65 - 1.95
1.65 - 4.3
1.95 - 4.3
-10
Typ.
Max.
Min.
1.4
1.3
1.1
0.9
Max.
V
0.7
0.5
0.4
0.4
0.5
50
nA
V
V
µA
V
IL
Input Voltage
Low
I
IN
I
NO(0FF)
I
A(ON)
I
0FF
R
ON
Control Input
Leakage
OFF-
Leakage
Current of
Port B
ON Leakage
Current of
Port A
Power Off
Leakage
Current
Switch ON
Resistance
(5)
V
CNTRL
= 0 to V
CC
V
A
= 0.3V, Vcc – 0.3V
V
B
= 0.3V, Vcc – 0.3V or
Floating (Figure 2)
V
A
= 0.3V, Vcc – 0.3V
V
B
= Floating (Figure 3)
Port A V
A
= 0.3V, 4.3V,
V
CC
=0V V
B
= 0V
I
ON
= 100mA, V
B
= 0V,
0.7V, 3.6V and 4.3V
(Figure 1)
I
ON
= 100mA, V
B
= 0V,
0.7V, 2.0V and 2.7V
(Figure 1)
I
ON
= 100mA, V
B
= 0V,
0.7V, 1.6V and 2.3V
(Figure 1)
I
ON
= 100mA, V
B
= 0.7V
(Figure 1)
-0.5
10
-50
1.95 - 4.3
-20
20
-100
100
nA
0V
±25
µA
4.3
0.36
0.6
2.7
0.4
0.7
Ω
2.3
0.55
0.8
1.65
4.3
1.5
0.25
R
FLAT(ON)
ON
Resistance
Flatness
(6)
I
ON
= 100mA, V
B
= 0V,
0.7V, 3.6V and 4.3V
(Figure 1)
I
ON
= 100mA, V
B
= 0V,
0.7V, 2.0V and 2.7V
(Figure 1)
I
ON
= 100mA, B = 0V, 0.7V,
1.6V and 2.3V (Figure 1)
I
ON
= 100mA, V
B
=0V, 0.7V,
0.9V and 1.65V (Figure 1)
2.7
0.25
Ω
2.3
1.65
4.3
-100
0.9
30
100
-500
0.3
I
CC
I
CCT
Quiescent
Supply
Current
Increase in
Icc per Input
V
SW
= 0 or V
CC
, I
OUT
=0
500
nA
V
CNTRL
= 2.6V
V
CNTRL
= 1.8V
4.3
3
7
12
6.0
15.0
µA
5. ON Resistance is determined by the voltage drop between A and B pins at the indicated current through the switch.
6. 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
FSA2156 Rev. 1.0.2
www.fairchildsemi.com
3
FSA2156 Low-Voltage SPST 0.4Ω Analog Switch
AC Electrical Characteristics
All typical values are @25°C unless otherwise specified.
Vcc
Symbol
Parameter
Conditions
(V)
Min
.
3.6 - 4.3
2.7 - 3.6
2.3 - 2.7
1.65 -
1.95
3.6 - 4.3
2.7 - 3.6
2.3 - 2.7
1.65 -
1.95
2.3 - 4.3
1.65 -
1.95
1.65 - 4.3
1.65 - 4.3
1.65 - 4.3
T
A
=+25ºC
Typ.
Max
.
55
60
65
40
65
70
75
90
6
1.3
-65
80
.02
T
A
=-40ºC
to +85ºC
Min
.
Max
.
60
65
70
70
75
80
Unit
s
Figur
e
t
ON
Turn-ON
Time
V
B
= 1.5V,
R
L
=50Ω, C
L
=35pF
ns
Figure
4&5
ns
t
OFF
Turn-OFF
Time
V
B
= 1.5V,
R
L
=50Ω, C
L
=35pF
C
L
=1.0nF, V
S
=0V ,
R
S
=0Ω
f=100kHz
R
T
= 50Ω
R
T
= 50Ω
C
L
= 0pF
R
T
= 600Ω, V
SW
=
0.5V P⋅P,
f=20Hz to 20kHz
Q
OIRR
BW
THD
Charge
Injection
OFF-
Isolation
-3db
Bandwidth
Total
Harmonic
Distortion
pC
dB
MHz
%
Figure
8
Figure
7
Figure
6
Capacitance
Vcc
Symbol
C
iN
C
OFF
C
ON
Parameter
Control Pin Input
Capacitance
B-Port OFF
Capacitance
A-Port ON
Capacitance
Conditions
f=1MHz
f=1MHz
f=1MHz
(V)
0
4.3
4.3
T
A
=+25ºC
Min.
Typ.
1.5
38
115
T
A
=-40ºC
to +85ºC
Min.
Max.
Max.
Unit
s
pF
pF
pF
Figures
Figure 9
Figure 9
Figure
10
VON
B
VSW
GND
FSA2156
A
I
ON
VCNTRL
R
ON
= V
ON
/ I
ON
GND
Floating, 0.3V
or Vcc-0.3V
B
FSA2156
A
I
A(OFF)
A
VSW
VCNTRL
GND
Figure 1. On Resistance
© 2006 Fairchild Semiconductor Corporation
FSA2156 Rev. 1.0.2
Figure 2. OFF Leakage
www.fairchildsemi.com
4
FSA2156 Low-Voltage SPST 0.4Ω Analog Switch
FSA2156
B
Floating
B
FSA2156
A
I
A(ON)
A
VSW
VCNTRL
GND
V
SW
GND
R
S
A
C
L
GND
R
L
V
OUT
V
CNTRL
GND
R
L
and C
L
are functions of the application
environment (see AC/DC tables for values).
C
L
includes test fixture and stray capacitance.
Figure 3. ON Leakage
Figure 4. Test Circuit Load
Figure 5. Turn ON / Turn OFF Waveforms
Network Analyzer
FSA2156
GND
V
CNTRL
GND
GND
V
IN
R
S
V
S
GND
R
T
GND
C
L
V
OUT
RT and CL are functions of the application
environment (see AC/DC tables for values).
CL includes test fixtures and stray
capacitance.
Figure 6. Bandwidth
© 2006 Fairchild Semiconductor Corporation
FSA2156 Rev. 1.0.2
www.fairchildsemi.com
5
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