5-1

FACT DATA

Dual 4Input Multiplexer

with 3State Outputs

The MC74AC353/74ACT353 is a dual 4-input multiplexer with 3-state outputs.

It can select two bits of data from four sources using common Select inputs. The

outputs may be individually switched to a high impedance state with a HIGH on the

respective Output Enable (OE) inputs, allowing the outputs to interface directly with

bus-oriented systems.

• Inverted Version of the MC74AC253/74ACT253

• Multifunction Capability

• Separate Enables for Each Multiplexer

• Outputs Source/Sink 24 mA

• ′ACT353 Has TTL Compatible Inputs

15

16

14

13

12

11

10

2

1

3

4

5

6

7

VCC

9

8

OEb

S0

I3b

I2b

I1b

I0b

Zb

OEa

S1

I3a

I2a

I1a

I0a

Za

GND

PIN NAMES

I0a–I3a

Side A Data Inputs

I0b–I3b

Side B Data Inputs

S0, S1

Common Select Inputs

OEa

Side A Enable Input

OEb

Side B Enable Input

Za, Zb

Multiplexer Outputs

TRUTH TABLE

Select

Inputs

Data Inputs

Output

Enable

Outputs

S0

S1

I0

I1

I2

I3

OE

Z

X

X

X

X

X

X

H

Z

L

L

L

X

X

X

L

H

L

L

H

X

X

X

L

L

H

L

X

L

X

X

L

H

H

L

X

H

X

X

L

L

L

H

X

X

L

X

L

H

L

H

X

X

H

X

L

L

H

H

X

X

X

L

L

H

H

H

X

X

X

H

L

L

Address inputs S0 and S1 are common to both sections.

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

MC74AC353

MC74ACT353

DUAL 4-INPUT

MULTIPLEXER WITH

3-STATE OUTPUTS

N SUFFIX

CASE 648-08

PLASTIC

D SUFFIX

CASE 751B-05

PLASTIC

LOGIC SYMBOL

S0

S1

OEa I0a I1a I2a I3a

Za

Zb

I0b I1b I2b I3b OEb