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54AC153 View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
54AC153 Dual 4-Input Multiplexer National-Semiconductor
National ->Texas Instruments National-Semiconductor
54AC153 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
Connection Diagrams
Pin Assignment
for DIP and Flatpak
Pin Assignment
for LCC
DS100271-3
Functional Description
The ’AC/’ACT153 is a dual 4-input multiplexer. It can select
two bits of data from up to four sources under the control of
the common Select inputs (S0, S1). The two 4-input multi-
plexer circuits have individual active-LOW Enables (Ea, Eb)
which can be used to strobe the outputs indepedently. When
the Enables (Ea, Eb) are HIGH, the corresponding outputs
Za, Zb) are forced LOW. The ’AC/’ACT153 is the logic imple-
mentation of a 2-pole, 4-position switch, where the position
of the switch is determined by the logic levels supplied to the
Select inputs. The logic equations for the outputs are shown
below.
Za = Ea (I0a S1 S0 + I1a S1 S0 +
I2a S1 S0 + I3a S1 S0)
Zb = Eb (I0b S1 S0 + I1b S1 S0 +
I2b S1 S0 + I3b S1 S0)
Truth Table
DS100271-4
Select
Inputs (a or b)
Inputs
S0
S1 E
I0
I1
I2
I3
X XHX X X X
L
LLL
X
X
X
L
L LH
X
X
X
H LLX L X X
Output
Z
L
L
H
L
H LLX H X X
H
L HLX X L X
L
L HLX X H X
H
H HLX X X L
L
H HLX X X H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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