The LF13508 is an 8-channel analog multiplexer which con-
nects the output to 1 of the 8 analog inputs depending on
the state of a 3-bit binary address An enable control allows
disconnecting the output thereby providing a package se-
lect function
This device is fabricated with National’s BI-FET technology
which provides ion-implanted JFETs for the analog switch
on the same chip as the bipolar decode and switch drive
circuitry This technology makes possible low constant
‘‘ON’’ resistance with analog input voltage variations This
device does not suffer from latch-up problems or static
charge blow-out problems associated with similar CMOS
parts The digital inputs are designed to operate from both
TTL and CMOS levels while always providing a definite
break-before-make action
The LF13509 is a 4-channel differential analog multiplexer
A 2-bit binary address will connect a pair of independent
analog inputs to one of any 4 pairs of independent analog
outputs The device has all the features of the LF13508
series and should be used whenever differential analog in-
puts are required
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
JFET switches rather than CMOS
No static discharge blow-out problem
No SCR latch-up problems
Analog signal range 11V
b
15V
Constant ‘‘ON’’ resistance for analog signals between
b
11V and 11V
‘‘ON’’ resistance 380
X
typ
Digital inputs compatible with TTL and CMOS
Output enable control
Break-before-make action t
OFF
e
0 2
ms
t
ON
e
2
ms
typ
Lower leakage devices available
Functional Diagrams and Truth Tables
LF13508
EN
H
H
H
H
H
H
H
H
L
LF13509
EN
L
H
H
H
H
A1
X
L
L
H
H
A0
X
L
H
L
H
SWITCH
PAIR ON
None
S1
S2
S3
S4
A2
L
L
L
L
H
H
H
H
X
A1
L
L
H
H
L
L
H
H
X
A0
L
H
L
H
L
H
L
H
X
SWITCH
ON
S1
S2
S3
S4
S5
S6
S7
S8
NONE
TL H 5668 – 1
C
1995 National Semiconductor Corporation
TL H 5668
RRD-B30M115 Printed in U S A
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Positive Supply
b
Negative Supply (V
CC
b
V
EE
)
36V
Positive Analog Input Voltage (Note 1)
Negative Analog Input Voltage (Note 1)
Positive Digital Input Voltage
Negative Digital Input Voltage
Analog Switch Current
V
CC
b
V
EE
V
CC
b
5V
500 mW
900 mW
500 mW
100 C
Maximum Junction Temperature (T
jMAX
)
Operating Temperature Range
0 C
s
T
A
s
a
70 C
Storage Temperature Range
Lead Temperature
D Package (Soldering 10 seconds)
N Package (Soldering 10 seconds)
Surface Mount Package (SO)
Vapor Phase (60 seconds)
Infrared (15 seconds)
b
65 C to
a
150 C
Power Dissipation (P
D
at 25 C)
(Notes 2 7)
Molded DIP (N)
P
D
Cavity DIP (D)
P
D
Small Outline (SO) P
D
l
I
S
l
k
10 mA
300 C
260 C
215 C
220 C
Electrical Characteristics
(Note 3)
Symbol
R
ON
DR
ON
R
ON
Match
I
S(OFF)
I
D(OFF)
I
D(ON)
V
INH
V
INL
I
INL
I
INL(EN)
t
TRAN
t
OPEN
t
ON(EN)
t
OFF(EN)
I
SO(OFF)
CT
C
S(OFF)
C
D(OFF)
I
CC
I
EE
Parameter
‘‘ON’’ Resistance
DR
ON
with Analog Voltage
Swing
R
ON
Match Between Switches
Source Current in ‘‘OFF’’
Condition
Drain Current in ‘‘OFF’’
Condition
Leakage Current in ‘‘ON’’
Condition
Digital ‘‘1’’ Input Voltage
Digital ‘‘0’’ Input Voltage
Digital ‘‘0’’ Input Current
Digital ‘‘0’’ Enable Current
Switching Time of Multiplexer
Break-Before-Make
Enable Delay ‘‘ON’’
Enable Delay ‘‘OFF’’
‘‘OFF’’ Isolation
Crosstalk
Source Capacitance (‘‘OFF’’)
Drain Capacitance (‘‘OFF’’)
Positive Supply Current
Negative Supply Current
V
IN
e
0 7V
V
EN
e
0 7V
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
15
12
18
16
16
02
b
66
b
66
Conditions
Min
V
OUT
e
0V I
S
e
100
mA
b
10V
s
V
OUT
s
a
10V I
S
e
100
mA
LF13508
LF13509
Typ
380
500
T
A
e
25 C
T
A
e
25 C
T
A
e
25 C
0 09
T
A
e
25 C
06
T
A
e
25 C
1
20
07
30
40
30
40
0 01
20
Max
650
850
1
150
5
50
20
500
20
500
T
A
e
25 C
Units
X
X
%
X
nA
nA
nA
nA
nA
nA
V
V
mA
mA
mA
mA
ms
ms
ms
ms
dB
dB
pF
pF
12
15
5
6
mA
mA
mA
mA
V
OUT
e
0V I
S
e
100
mA
(Note 4)
Switch ‘‘OFF’’ V
S
e
11 V
D
eb
11
Switch ‘‘OFF’’ V
S
e
11 V
D
eb
11
(Note 4)
Switch ‘‘ON’’ V
D
e
11V (Note 4)
(Figure 1)
(Note 5)
(Figure 3)
(Figure 2)
(Figure 2)
(Note 6)
LF13509 Series (Note 6)
Switch ‘‘OFF’’ V
OUT
e
0V
V
S
e
0V
Switch ‘‘OFF’’ V
OUT
e
0V
V
S
e
0V
All Digital Inputs Grounded
All Digital Inputs Grounded
22
11 4
74
79
27
28
2
Electrical Characteristics
(Continued)
Note 1
If the analog input voltage exceeds this limit the input current should be limited to less than 10 mA
Note 2
The maximum power dissipation for these devices must be derated at elevated temperatures and is dictated by T
jMAX
i
jA
and the ambient temperature
T
A
The maximum available power dissipation at any temperature is P
D
e
(T
jMAX
b
T
A
)
i
jA
or the 25 C P
DMAX
whichever is less
Note 3
These specifications apply for V
S
e
g
15V and over the absolute maximum operating temperature range (T
L
s
T
A
s
T
H
) unless otherwise noted
Note 4
Conditions applied to leakage tests insure worse case leakages Exceeding 11V on the analog input may cause an ‘‘OFF’’ channel to turn ‘‘ON’’
Note 5
Lots are sample tested to this parameter The measurement conditions of
Figure 1
insure worse case transition time
Note 6
‘‘OFF’’ isolation is measured with all switches ‘‘OFF’’ and driving a source Crosstalk is measured with a pair of switches ‘‘ON’’ driving channel A and
measuring channel B R
L
e
200 C
L
e
7 pF V
S
e
3 Vrms f
e
500 kHz
Note 7
Thermal Resistance
i
jA
(Junction to Ambient)
Molded DIP (N)
150 C W
Cavity DIP (D)
100 C W
Connection Diagrams
LF13508
Dual-In-Line (N or D) or Small Outline (SO) Packages
LF13509
Dual-In-Line (N or D) or Small Outline (SO) Packages
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