74AC153 74ACT153 Dual 4-Input Multiplexer
November 1988
Revised November 1999
74AC153 74ACT153
Dual 4-Input Multiplexer
General Description Features
The AC/ACT153 is a high-speed dual 4-input multiplexer I reduced by 50%
CC
with common select inputs and individual enable inputs for
Outputs source/sink 24 mA
each section. It can select two lines of data from four
ACT153 has TTL-compatible inputs
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 gener-
ate any two functions of three variables.
Ordering Code:
Order Number Package Number Package Description
74AC153SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Body
74AC153SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC153MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC153PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74ACT153SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Body
74ACT153MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter X to the ordering code.
Logic Symbols Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names Description
I I Side A Data Inputs
0a 3a
I I Side B Data Inputs
0b 3b
S , S Common Select Inputs
0 1
E Side A Enable Input
a
E Side B Enable Input
b
Z Side A Output
a
Z Side B Output
b
FACT is a trademark of Fairchild Semiconductor Corporation.
1999 Fairchild Semiconductor Corporation DS009928 www.fairchildsemi.comFunctional Description Truth Table
The AC/ACT153 is a dual 4-input multiplexer. It can select
Select
two bits of data from up to four sources under the control of
Inputs (a or b) Output
Inputs
the common Select inputs (S , S ). The two 4-input multi-
0 1
plexer circuits have individual active-LOW Enables (E , E )
a b S S E I I I I Z
0 1 0 1 2 3
which can be used to strobe the outputs independently.
XX H XXX X L
When the Enables (E , E ) are HIGH, the corresponding
a b
LL LL X X X L
outputs Z , Z ) are forced LOW. The AC/ACT153 is the
a b
LL L H X X X H
logic implementation of a 2-pole, 4-position switch, where
the position of the switch is determined by the logic levels HL L X L X X L
supplied to the Select inputs. The logic equations for the
outputs are shown below.
HL L X H X X H
LH L X X L X L
Z = E (I S S + I S S +
a a 0a 1 0 1a 1 0
LH L X X H X H
I S S + I S S )
2a 1 0 3a 1 0
HH L X X X L L
Z = E (I S S + I S S +
b b 0b 1 0 1b 1 0
HH L X X X H H
I S S + I S S )
2b 1 0 3b 1 0
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Logic Diagram
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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74AC153 74ACT153