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National Semiconductor Electronic Components Datasheet

54ACT153 Datasheet

Dual 4-Input Multiplexer

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September 1998
54AC153 54ACT153
Dual 4-Input Multiplexer
General Description
The ’AC/’ACT153 is a high-speed dual 4-input multiplexer
with common select inputs and individual enable inputs for
each section. It can select two lines of data from four
sources. The two buffered outputs present data in the true
(non-inverted) form. In addition to multiplexer operation, the
’AC/’ACT153 can act as a function generator and generate
any two functions of three variables.
Features
n ICC reduced by 50%
n Outputs source/sink 24 mA
n ’ACT153 has TTL-compatible inputs
n Standard Microcircuit Drawings (SMD)
— ’AC153: 5962-87625
— ’ACT153: 5962-87698
Logic Symbols
IEEE/IEC
DS100271-1
Pin
Names
I0a– I3a
I0b– I3b
S0, S1
Ea
Eb
Za
Zb
Description
Side A Data Inputs
Side B Data Inputs
Common Select
Inputs
Side A Enable Input
Side B Enable Input
Side A Output
Side B Output
DS100271-2
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100271
www.national.com


National Semiconductor Electronic Components Datasheet

54ACT153 Datasheet

Dual 4-Input Multiplexer

No Preview Available !

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
S0 S1
XX
LL
LL
HL
E
H
L
L
L
Inputs (a or b)
I0 I1 I2
XXX
LXX
HXX
XLX
I3
X
X
X
X
Output
Z
L
L
H
L
H LLX H X X
L HLX X L X
L HLX X H X
H HLX X X L
H HLX X X H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
H
L
H
L
H
www.national.com
2


Part Number 54ACT153
Description Dual 4-Input Multiplexer
Maker National Semiconductor
Total Page 8 Pages
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