Philips Semiconductors

Product specification

74ALS151

8-input multiplexer

2

1991 Feb 08

853–1022 01670

FEATURES

DESCRIPTION

The 74ALS151 is a logic implementation of a single 8-position

switch with the switch position controlled by the state of three select

(S0, S1, S2) inputs. True (Y) and complementary (Y) outputs are

both provided.

The enable (E) is active-Low. When E is High, Y output is Low and

the Y output is High regardless of all other inputs.

TYPE

TYPICAL

PROPAGATION DELAY

TYPICAL

SUPPLY CURRENT

(TOTAL)

74ALS151

8.0ns

8.0mA

PIN CONFIGURATION

16

15

14

13

12

11

10

7

6

5

4

3

2

1

E

I7

S0

S1

I6

I4

I5

I3

I2

Y

I1

I0

Y

9

8

GND

S2

SF00742

ORDERING INFORMATION

ORDER CODE

DESCRIPTION

COMMERCIAL RANGE

DRAWING

NUMBER

16-pin plastic DIP

74ALS151N

SOT38-4

16-pin plastic SO

74ALS151D

SOT109-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74ALS (U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

I0 – I7

Data inputs

1.0/1.0

20

µA/0.1mA

S0 – S2

Select inputs

1.0/1.0

20

µA/0.1mA

E

Enable input (active-Low)

1.0/1.0

20

µA/0.1mA

Y, Y

Data outputs

130/240

2.6mA/24mA

NOTE:

One (1.0) ALS unit load is defined as: 20

µA in the High state and 0.1mA in the Low state.

LOGIC SYMBOL

1

2

3

GND = Pin 8

SF00743

6

5

11

10

9

S0

S1

S2

7

4

12

13

14

15

E

YY

I0

I1

I2

I3

I4

I5

I6

I7

IEC/IEEE SYMBOL

SF00744

MUX

7

11

3

2

1

5

6

0

G

0

7

10

2

EN

9

4

14

13

12

15