74ACTQ153(2001) 데이터 시트보기 (PDF) - Fairchild Semiconductor
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74ACTQ153 Datasheet PDF : 7 Pages
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Functional Description
The ACTQ153 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 independently.
When the Enables (Ea, Eb) are HIGH, the corresponding
outputs (Az, Zb) are forced LOW. The ACTQ153 is the logic
implementation of a 2-pole, 4-position switch, where the
position of the switch is determined by the logic levels sup-
plied to the Select inputs. The logic equations for the out-
puts 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)
Logic Diagram
Truth Table
Select
Inputs
S0 S1 E
XXH
LLL
LLL
HLL
HLL
LHL
LHL
HHL
HHL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Inputs (a or b)
I0
I1
I2
XXX
L XX
HXX
XLX
XHX
XXL
XXH
XXX
XXX
Outputs
I3
Z
X
L
X
L
X
H
X
L
X
H
X
L
X
H
L
L
H
H
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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