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54LS151 View Datasheet(PDF) - Motorola => Freescale

Part NameDescriptionManufacturer
54LS151 8-INPUT MULTIPLEXER Motorola
Motorola => Freescale Motorola
54LS151 Datasheet PDF : 5 Pages
1 2 3 4 5
LOGIC DIAGRAM
9
S2
10
S1
11
S0
7
E
SN54 / 74LS151
I0
I1
I2
I3
I4
I5
I6
I7
4
3
2
1
15
14
13
12
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
65
ZZ
FUNCTIONAL DESCRIPTION
The LS151 is a logical implementation of a single pole,
8-position switch with the switch position controlled by the
state of three Select inputs, S0, S1, S2. Both assertion and
negation outputs are provided. The Enable input (E) is active
LOW. When it is not activated, the negation output is HIGH
and the assertion output is LOW regardless of all other inputs.
The logic function provided at the output is:
Z = E (I0 S0 S1 S2 + I1 S0 S1 S2 + I2 S0 S1 S2
+ I3 S0 S1 S2 + I4 S0 S1 S2 + I5 S0 S1 S2 + I6 S0
S1 S2 + I7 S0 S1 S2).
The LS151 provides the ability, in one package, to select
from eight sources of data or control information. By proper
manipulation of the inputs, the LS151 can provide any logic
function of four variables and its negation.
TRUTH TABLE
E S2 S1 S0 I0 I1 I2 I3 I4 I5 I6 I7 Z Z
HXXXXXXXXXXXHL
L L L L LXXXXXXXHL
L L L LHXXXXXXXLH
L L LHXLXXXXXXHL
L L LHXHXXXXXXLH
L LHLXXLXXXXXHL
L LHLXXHXXXXXLH
L LHHXXX L XXXXHL
L LHHXXXHXXXX LH
LHL LXXXXLXXXHL
LHL LXXXXHXXXLH
L H L HXXXXX L XXH L
L H L HXXXXXHXX L H
LHHL XXXXXX L XHL
LHHL XXXXXXHX LH
LHHHXXXXXXX LHL
L HHHX X X X X X XH L H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
FAST AND LS TTL DATA
5-253
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