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.
SN54/74LS158
•
•
•
•
•
•
QUAD 2-INPUT MULTIPLEXER
LOW POWER SCHOTTKY
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)
VCC
16
E
15
I0c
14
I1c
13
Zc
12
I0d
11
I1d
10
Zd
9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
16
J SUFFIX
CERAMIC
CASE 620-09
1
1
S
2
I0a
3
I1a
4
Za
5
I0b
6
I1b
7
Zb
8
GND
16
1
N SUFFIX
PLASTIC
CASE 648-08
PIN NAMES
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)
LOADING
(Note a)
HIGH
1.0 U.L.
1.0 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
LOW
0.5 U.L.
0.5 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
µA
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
2
3
I1a
5
I0b
6
I1b
14
I0c
13
I1c
11
I0d
10
I1d E S
15
1
LOGIC SYMBOL
15 2 3
5
6 14 13 11 10
E I0a I1a I0b I1b I0c I1c I0d I1d
1
S
Za
Zb
Zc
Zd
4
7
12
9
4
7
12
9
Za
Zb
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
Zd
VCC = PIN 16
GND = PIN 8
Zc
FAST AND LS TTL DATA
5-273
MOTOROLA [ MOTOROLA, INC ]
