SN54LS157 Datasheet, PDF (1/5 Pages) Motorola, Inc – QUAD 2-INPUT MULTIPLEXER

QUAD 2-INPUT MULTIPLEXER
The LSTTL / MSI SN54 / 74LS157 is a high speed Quad 2-Input Multiplexer.
Four bits of data from two sources can be selected using the common Select
and Enable inputs. The four buffered outputs present the selected data in the
true (non-inverted) form. The LS157 can also be used to generate any four
of the 16 different functions of two variables. The LS157 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
• Non-Inverting Outputs
• Input Clamp Diodes Limit High Speed Termination Effects
• Special Circuitry Ensures Glitch Free Multiplexing
• ESD > 3500 Volts
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC E I0c I1c Zc I0d I1d Zd
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version has
the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
12
3
4
56
78
S I0a I1d 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
Multiplexer 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 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 I1a I0b
2
3
5
I1b
6
I0c
14
I1c
13
I0d
11
I1d E S
10 15
1
VCC = PIN 16
GND = PIN 8
4
7
12
9
= PIN NUMBERS
Za
Zb
Zc
Zd
FAST AND LS TTL DATA
5-268
SN54/74LS157
QUAD 2-INPUT MULTIPLEXER
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
LOGIC SYMBOL
15 2 3 5 6 14 13 11 10
E I0a I1a I0b I1b I0c I1c I0d I1d
1S
Za Zb Zc Zd
4
7 12 9
VCC = PIN 16
GND = PIN 8