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FSA3357 Low Voltage SP3T Analog Switch (3:1 Multiplexer/Demultiplexer)
December 2002
Revised August 2005
FSA3357
Low Voltage SP3T Analog Switch
(3:1 Multiplexer/Demultiplexer)
General Description
The FSA3357 is a high performance, single-pole/triple-throw
(SP3T) Analog Switch or 3:1 Multiplexer/Demultiplexer. The
device is fabricated with advanced sub-micron CMOS technol-
ogy to achieve high speed enable and disable times and low On
Resistance. The break before make select circuitry prevents
disruption of signals on the B
0
, B
1
, or B
2
Ports due to the
switches temporarily being enabled during select pin switching.
The device is specified to operate over the 1.65 to 5.5V V
CC
operating range. The control input tolerates voltages up to 5.5V
independent of the V
CC
operating range.
Features
O
Useful in both analog and digital applications
O
Space saving US8 8-lead surface mount package
O
Low On Resistance;
9
:
on typ @ 3.3V V
CC
O
Broad V
CC
operating range; 1.65V to 5.5V
O
Rail-to-Rail signal handling
O
Power down high impedance control input
O
Overvoltage tolerance of control input to 7.0V
O
Break before make enable circuitry
O
250 MHz - 3dB bandwidth
O
Space saving Pb-Free MicroPak
¥
packaging
Applications
O
Cell Phone
O
PDA
O
Video
Ordering Code:
Product
Order
Number
FSA3357K8X
FSA3357L8X
Package
Number
MAB08A
MAC08A
Code
Top Mark
A357
FE
Package Description
Supplied As
8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide 3k Units on Tape and Reel
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
5k Units on Tape and Reel
Pb-Free package per JEDEC J-STD-020B.
MicroPak
¥
is a trademark of Fairchild Semiconductor Corporation.
Absolute maximum ratings are DC values beyond which the device may be
damaged or have its useful life impaired. The datasheet specifications should be met,
without exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. Fairchild does not recommend oper-
ation outside datasheet specifications.
Note 2:
The input and output negative voltage ratings may be exceeded if the input
and output diode current ratings are observed.
Note 3:
Control inputs must be held HIGH or LOW, they must not float.
DC Electrical Characteristics
Symbol
V
IH
Parameter
HIGH Level
Input Voltage
V
IL
LOW Level
Input Voltage
I
IN
I
OFF
R
ON
Input Leakage Current
OFF State Leakage Current
Switch On Resistance
(Note 4)
V
CC
(V)
1.65
1.95
2.3
5.5
1.65
1.95
2.3
5.5
0
5.5
1.65
5.5
4.5
5.0
6.0
7.0
3.0
6.5
9.0
2.3
8.0
11.0
1.65
10.0
17.0
I
CC
Quiescent Supply Current
5.5
All Channels ON or OFF
ASR
Analog Signal Range
On Resistance Match
Between Channels
(Note 4)(Note 5)(Note 6)
V
CC
4.5
3.0
2.3
1.65
R
flat
On Resistance Flatness
(Note 4)(Note 5)(Note 7)
5.0
3.3
2.5
1.8
0.0
0.15
0.22
0.31
0.62
6.0
12.0
40.0
140.0
V
CC
0.0
V
CC
1.0
10.0
Min
0.75 V
CC
0.7 V
CC
0.25 V
CC
0.3 V
CC
T
A
=
25
q
C
Typ
Max
T
A
=
40
q
C to
85
q
C
Min
0.75 V
CC
0.7 V
CC
0.25 V
CC
0.3 V
CC
V
Max
V
Units
Conditions
r
0.1
r
0.1
7.0
12.0
15.0
9.0
20.0
12.0
30.0
20.0
50.0
r
1.0
r
1.0
7.0
12.0
15.0
9.0
20.0
12.0
30.0
20.0
50.0
P
A
P
A
0
d
V
IN
d
5.5V
0
d
A, B
n
d
V
CC
V
IN
= 0V, I
O
= 30 mA
V
IN
= 2.4V, I
O
=
30 mA
V
IN
= 4.5V, I
O
=
30 mA
V
IN
= 0V, I
O
= 24 mA
:
V
IN
= 3V, I
O
=
24 mA
V
IN
= 0V, I
O
= 8 mA
V
IN
= 2.3V, I
O
=
8 mA
V
IN
= 0V, I
O
= 4 mA
V
IN
= 1.65V, I
O
=
4 mA
P
A
V
V
IN
= V
CC
or GND
I
OUT
= 0
I
A
=
30 mA, V
Bn
= 3.15
'
R
ON
:
I
A
=
24 mA, V
Bn
= 2.1
I
A
=
8 mA, V
Bn
= 1.6
I
A
=
4 mA, V
Bn
= 1.15
I
A
=
30 mA, 0
d
V
Bn
d
V
CC
I
A
=
24 mA, 0
d
V
Bn
d
V
CC
I
A
=
8 mA, 0
d
V
Bn
d
V
CC
I
A
=
4 mA, 0
d
V
Bn
d
V
CC
:
3
www.fairchildsemi.com
FSA3357
DC Electrical Characteristics
Note 5:
Parameter is characterized but not tested in production.
(Continued)
Note 4:
Measured by the voltage drop between A and B
n
pins at the indicated current through the switch. On Resistance is determined by the lower of the voltages on the two (A
or B
n
Ports).
Note 6:
'
R
ON
= R
ON
max
R
ON
min measured at identical V
CC
, temperature and voltage levels.
Note 7:
Flatness is defined as the difference between the maximum and minimum value of On Resistance over the specified range of conditions.
AC Electrical Characteristics
Symbol
t
PHL
t
PLH
Parameter
Propagation Delay
Bus to Bus
(Note 8)
V
CC
(V)
1.65
1.95
2.3
2.7
3.0
3.6
4.5
5.5
t
PZL
t
PZH
Output Enable Time
Turn on Time
(A to B
n
)
1.65
1.95
2.3
2.7
3.0
3.6
4.5
5.5
t
PLZ
t
PHZ
Output Disable Time
Turn Off Time
(A Port to B
n
Port)
1.65
1.95
2.3
2.7
3.0
3.6
4.5
5.5
t
B-M
Break Before Make Time
(Note 9)
1.65
1.95
2.3
2.7
3.0
3.6
4.5
5.5
Q
Charge Injection (Note 9)
5.0
3.3
OIRR
Off Isolation (Note 10)
1.65
5.5
1.65
5.5
1.65
5.5
5.0
3.0
2.0
1.5
3.0
2.0
1.5
0.8
0.5
0.5
0.5
0.5
3.0
pC
2.0
Min
T
A
=
25
q
C
Typ
2.0
1.1
ns
0.7
0.4
32.0
15.0
9.5
6.5
14.0
7.2
5.1
3.7
5.0
3.0
2.0
1.5
3.0
2.0
1.5
0.8
0.5
0.5
ns
0.5
0.5
C
L
= 0.1 nF, V
GEN
= 0V
R
GEN
= 0
:
R
L
= 50
:
f = 10MHz
Xtalk
Crosstalk
R
L
= 50
:
f = 10MHz
BW
THD
R
L
= 50
:
R
L
= 600
:
5.0
.01
%
0.5 V
P-P
f = 600 Hz to 20 KHz
Figure 4
Figure 3
34.0
16.5
ns
11.0
7.0
14.5
7.8
ns
5.5
4.0
V
I
= 2 x V
CC
for t
PLZ
V
I
= 0V for t
PHZ
Figures
1, 2
V
I
= 2 x V
CC
for t
PZL
V
I
= 0V for t
PZH
Figures
1, 2
V
I
= OPEN
Figures
1, 2
Max
T
A
=
40
q
C to
85
q
C
Min
Max
Figure
Units
Conditions
Number
58.0
60.0
250.0
dB
Figure 5
dB
MHz
Figure 6
Figure 9
3dB Bandwidth
Total Harmonic Distortion
(Note 9)
Note 8:
This parameter is guaranteed by design but not tested. The bus switch contributes no propagation delay other than the RC delay of the On Resistance of the switch and
the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance).
Note 9:
Guaranteed by Design.
Note 10:
Off Isolation = 20 log
10
[V
A
/ V
Bn
]
Capacitance
Symbol
C
IN
C
IO-B
C
IOA-ON
(Note 11)
Figure
Parameter
Typ
2.0
3.6
14.5
Max
Units
pF
pF
pF
Conditions
Number
V
CC
= 0V
V
CC
= 5.0V
V
CC
= 5.0V
Figure 7
Figure 8
Control Pin Input Capacitance
B Port Off Capacitance
A Port Capacitance When Switch Is Enabled
Note 11:
T
A
=
25
q
C, f = 1 MHz, Capacitance is characterized but not tested in production.
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