2004 Fairchild Semiconductor Corporation
DS500842
www.fairchildsemi.com
November 2003
Revised July 2004
FSA1
1
56
FSA1
157 Low
RON
Low V
o
l
t
a
g
e
SPST Analog Swit
ch
FSA1156 FSA1157
Low R
ON
Low Voltage SPST Analog Switch
General Description
The FSA1156 and FSA1157 are high performance Single
Pole/Single Throw (SPST) analog switches. The devices
feature ultra low R
ON
of 0.75
(typical) and will operate
over the wide V
CC
range of 1.65V to 5.5V. The devices are
fabricated with sub-micron CMOS technology to achieve
fast switching speeds. The select input is TTL level com-
patible. The FSA1156 has Normally Open operation and
the FSA1157 has Normally Closed operation.
Features
s
Maximum 0.9
On Resistance (R
ON
) for 4.5V supply
at 25
C
s
0.3
maximum R
ON
flatness for 4.5V supply
s
Broad V
CC
operating range: 1.65V to 5.5V
s
Fast turn-on and turn-off time
s
Over-voltage tolerant TTL compatible control input
s
Available in SC70 and MicroPak
space saving surface
mount packages
Ordering Code:
MicroPak
is a trademark of Fairchild Semiconductor Corporation.
Order Number
Product Code
Package
Package Description
Supplied As
Top Mark
Number
FSA1156P6
156
MAA06A
6-Lead SC70, EIAJ SC88, 1.25mm Wide
250 Units on Tape and Reel
FSA1156P6X
156
MAA06A
6-Lead SC70, EIAJ SC88, 1.25mm Wide
3k Units on Tape and Reel
FSA1156L6X
EH
MAC06A
6-Lead MicroPak, 1.0mm Wide
5k Units on Tape and Reel
FSA1157P6
157
MAA06A
6-Lead SC70, EIAJ SC88, 1.25mm Wide
250 Units on Tape and Reel
FSA1157P6X
157
MAA06A
6-Lead SC70, EIAJ SC88, 1.25mm Wide
3k Units on Tape and Reel
FSA1157L6X
EJ
MAC06A
6-Lead MicroPak, 1.0mm Wide
5k Units on Tape and Reel
www.fairchildsemi.com
2
FSA1
156
FSA1
157
Analog Symbols
Pin Assignments for SC70 Package
(Top View)
FSA1156 (Normally Open)
Pin Assignments for MicroPak
(Top Through View)
FSA1156 (Normally Open)
Pin Assignments for SC70 Package
(Top View)
FSA1157 (Normally Closed)
Pin Assignment for MicroPak
(Top Through View)
FSA1157 (Normally Closed)
Truth Table
H
=
HIGH Logic Level
L
=
LOW Logic Level
Pin Descriptions
Control Input
Function of
Function of
(S)
FSA1156
FSA1157
L
OFF
ON
H
ON
OFF
Pin Name
Description
A, B
Data Ports
S
Control Input
NC
No Connect
3
www.fairchildsemi.com
FSA1
1
56
FSA1
157
Absolute Maximum Ratings
(Note 1)
Recommended Operating
Conditions
(Note 3)
Note 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 rating.
The "Recommended Operating Conditions" table will define the conditions
for actual device operation.
Note 2: The input and output negative ratings may be exceeded if the input
and output diode current ratings are observed.
Note 3: Control input must be held HIGH or LOW and it must not float.
DC Electrical Characteristics
(all typical values are at 25
C unless otherwise specified)
Note 4: On Resistance is determined by the voltage drop between A and B pins at the indicated current through the switch.
Note 5: Flatness is defined as the difference between the maximum and minimum value of On Resistance over the specified range of conditions.
Supply Voltage (V
CC
)
-
0.5V to
+
6.0V
Switch Voltage (Note 2)
-
0.5V to V
CC
+
0.5V
Input Voltage (V
IN
) (Note 2)
-
0.5V to
+
6.0V
Input Diode Current
-
50 mA
Switch Current
200 mA
Peak Switch Current
(Pulsed at 1mS duration,
<
10% Duty Cycle)
400 mA
Power Dissipation at 85
C
SC70 package
180 mW
Storage Temperature Range (T
STG
)
-
60
C to
+
150
C
Maximum Junction Temperature (T
J
)
+
150
C
Lead Temperature (T
L
)
(Soldering, 10 seconds)
+
260
C
ESD (Human Body Model)
8000V
Supply Voltage (V
CC
)
1.65V to 5.5V
Control Input Voltage (Note 3)
0V to V
CC
Switch Input Voltage
0V to V
CC
Operating Temperature
-
40
C to 85
C
Thermal Resistance
JA
in Still Air
SC70 package
350
C/W
Symbol
Parameter
V
CC
T
A
=
+
25
C
T
A
=
-
40
C to
+
85
C
Units
Conditions
(V)
Min
Typ
Max
Min
Max
V
IH
Input Voltage HIGH
2.7 to 3.6
2.0
V
4.5 to 5.5
2.4
V
IL
Input Voltage LOW
2.7 to 3.6
0.6
V
4.5 to 5.5
0.8
I
IN
Control Input Leakage
2.7 to 3.6
-
1.0
1.0
A
V
IN
=
0V to V
CC
4.5 to 5.5
-
1.0
1.0
I
NO(OFF)
,
OFF Leakage
5.5
-
2.0
2.0
-
20.0
20.0
nA
A
=
1V, 4.5V
I
NC(OFF)
Current
B
=
4.5V, 1V
I
A(ON)
ON Leakage
5.5
-
4.0
4.0
-
40.0
40.0
nA
A
=
1V, 4.5V
Current
B
=
1V, 4.5V or Floating
R
ON
Switch On Resistance
2.7
1.4
2.1
2.5
I
OUT
=
100mA, B
=
1.5V
(Note 4)
4.5
0.75
0.9
1.0
I
OUT
=
100mA, B
=
3.5V
R
FLAT(ON)
On Resistance Flatness
2.7
0.6
I
OUT
=
100mA, B
0
=
0V, 0.75V,1.5V
(Note 5)
4.5
0.1
0.2
0.3
I
OUT
=
100mA, B
0
=
0V, 1V, 2V
I
CC
Quiescent Supply
3.6
0.1
0.5
1.0
A
V
IN
=
0V or V
CC
, I
OUT
=
0V
Current
5.5
0.1
0.5
1.0
PDF 
ZIP
