5-273
FAST AND LS TTL DATA
QUAD 2-INPUT MULTIPLEXER
The LSTTL/ MSI SN54L/ 74LS158 is a high speed Quad 2-input Multiplex-
er. It selects four bits of data from two sources using the common Select and
Enable inputs. The four buffered outputs present the selected data in the
inverted form. The LS158 can also generate any four of the 16 different
functions of two variables. The LS158 is fabricated with the Schottky barrier
diode process for high speed and is completely compatible with all Motorola
TTL families.
Schottky Process for High Speed
Multifunction Capability
Inverted Outputs
Input Clamp Diodes Limit High Speed Termination Effects
ESD > 3500 Volts
Special Circuitry Ensures Glitch Free Multiplexing
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
VCC
S
E
I0c
I1c
Zc
I1d
I0d
Zd
I0a
I1a
Za
I0b
I1b
Zb GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
S
E
I0a I0d
I1a I1d
Za Zd
Common Select Input
Enable (Active LOW) Input
Data Inputs from Source 0
Data Inputs from Source 1
Inverted Outputs (Note b)
1.0 U.L.
1.0 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
0.5 U.L.
0.5 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
A HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
Temperature Ranges.
LOGIC DIAGRAM
I0a
I1a
I0b
I1b
I0c
I1c
I0d
I1d E S
Za
Zb
Zc
Zd
14
1
2
6
7
3
4
5
9
11
12
10
13
15
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
SN54/74LS158
QUAD 2-INPUT MULTIPLEXER
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN
Plastic
SN74LSXXXD
SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
VCC = PIN 16
GND = PIN 8
15 2 3 5 6 14 13 11 10
1
4
7
12
9
E I0a I1a I0b I1b I0c I1c I0d I1d
Za
Zb
Zc
Zd
S
5-274
FAST AND LS TTL DATA
SN54/74LS158
FUNCTIONAL DESCRIPTION
The LS158 is a Quad 2-input Multiplexer fabricated with the
Schottky barrier diode process for high speed. It selects four
bits of data from two sources under the control of a common
Select Input (S) and presents the data in inverted form at the
four outputs. The Enable Input (E) is active LOW. When E is
HIGH, all of the outputs (Z) are forced HIGH regardless of all
other inputs.
The LS158 is the logic implementation of a 4-pole,
2-position switch where the position of the switch is deter-
mined by the logic levels supplied to the Select Input.
A common use of the LS158 is the moving of data from two
groups of registers to four common output busses. The
particular register from which the data comes is determined by
the state of the Select Input. A less obvious use is as a function
generator. The LS158 can generate four functions of two
variables with one variable common. This is useful for
implementing gating functions.
TRUTH TABLE
ENABLE
SELECT
INPUT
INPUTS
OUTPUT
E
S
I0
I1
Z
H
X
X
X
H
L
L
L
X
H
L
L
H
X
L
L
H
X
L
H
L
H
X
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
55
0
25
25
125
70
C
IOH
Output Current -- High
54, 74
0.4
mA
IOL
Output Current -- Low
54
74
4.0
8.0
mA
5-275
FAST AND LS TTL DATA
SN54/74LS158
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54
0.7
V
Guaranteed Input LOW Voltage for
All Inputs
VIL
Input LOW Voltage
74
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
0.65
1.5
V
VCC = MIN, IIN = 18 mA
VOH
Output HIGH Voltage
54
2.5
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOH
Output HIGH Voltage
74
2.7
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 4.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VOL
Output LOW Voltage
74
0.35
0.5
V
IOL = 8.0 mA
VIN = VIL or VIH
per Truth Table
IIH
Input HIGH Current
I0, I1
E, S
20
40
A
VCC = MAX, VIN = 2.7 V
IIH
I0, I1
E, S
0.1
0.2
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
I0, I1
E, S
0.4
0.8
mA
VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 1)
20
100
mA
VCC = MAX
ICC
Power Supply Current
8.0
mA
VCC = MAX
All inputs at 4.5 V.
All outputs open.
ICC
Power Supply Current
11
mA
VCC = MAX
All other input
combinations.
All outputs open.
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
(TA = 25
C)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tPLH
tPHL
Propagation Delay
Data to Output
7.0
10
12
15
ns
Figure 2
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
Propagation Delay
Enable to Output
11
18
17
24
ns
Figure 1
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
Propagation Delay
Select to Output
13
16
20
24
ns
Figure 2
AC WAVEFORMS
Figure 1
Figure 2
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
1.3 V
tPLH
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
5-276
FAST AND LS TTL DATA
MIN
MIN
MAX
MAX
MILLIMETERS
INCHES
DIM
A
B
C
D
F
G
J
K
M
P
R
9.80
3.80
1.35
0.35
0.40
0.19
0.10
0
5.80
0.25
10.00
4.00
1.75
0.49
1.25
0.25
0.25
7
6.20
0.50
0.386
0.150
0.054
0.014
0.016
0.008
0.004
0
0.229
0.010
0.393
0.157
0.068
0.019
0.049
0.009
0.009
7
0.244
0.019
1.27 BSC
0.050 BSC
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. 751B 01 IS OBSOLETE, NEW STANDARD
751B 03.
1
8
9
16
-A-
-B-
P
16 PL
D
-T-
K
C
G
M
R X 45
F
J
8 PL
SEATING
PLANE
Case 751B-03 D Suffix
16-Pin Plastic
SO-16
B
0.25 (0.010)
M
M
T
0.25 (0.010)
B
A
M
S
S
Case 648-08 N Suffix
16-Pin Plastic
MIN
MIN
MAX
MAX
MILLIMETERS
INCHES
DIM
A
B
C
D
F
G
H
J
K
L
M
S
18.80
6.35
3.69
0.39
1.02
0.21
2.80
7.50
0
0.51
19.55
6.85
4.44
0.53
1.77
0.38
3.30
7.74
10
1.01
0.740
0.250
0.145
0.015
0.040
0.008
0.110
0.295
0
0.020
0.770
0.270
0.175
0.021
0.070
0.015
0.130
0.305
10
0.040
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L" TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B" DOES NOT INCLUDE MOLD
FLASH.
5. ROUNDED CORNERS OPTIONAL.
6. 648 01 THRU 07 OBSOLETE, NEW STANDARD
648 08.
2.54 BSC
1.27 BSC
0.100 BSC
0.050 BSC
-A-
B
1
8
9
16
F
H
G
D
16 PL
S
C
-T-
SEATING
PLANE
K
J
M
L
T A
0.25 (0.010)
M
M
Case 620-09 J Suffix
16-Pin Ceramic Dual In-Line
MIN
MIN
MAX
MAX
MILLIMETERS
INCHES
DIM
19.05
6.10
0.39
1.40
0.23
0
0.39
19.55
7.36
4.19
0.53
1.77
0.27
5.08
15
0.88
0.750
0.240
0.015
0.055
0.009
0
0.015
0.770
0.290
0.165
0.021
0.070
0.011
0.200
15
0.035
1.27 BSC
2.54 BSC
7.62 BSC
0.050 BSC
0.100 BSC
0.300 BSC
A
B
C
D
E
F
G
J
K
L
M
N
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIM F MAY NARROW TO 0.76 (0.030) WHERE
THE LEAD ENTERS THE CERAMIC BODY.
5. 620 01 THRU 08 OBSOLETE, NEW STANDARD
620 09.
-B-
-A-
16 PL
-T-
C
D
E
F
G
J
K
M
N
SEATING
PLANE
16 PL
L
16
9
1
8
0.25 (0.010)
T A
M
S
0.25 (0.010)
T B
M
S
5-277
FAST AND LS TTL DATA
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different
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