SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS

WITH 3-STATE OUTPUTS

SDAS124C – APRIL 1982 – REVISED AUGUST 1996

2

POST OFFICE BOX 655303

OE

MUX

2

1A

1

3

1B

EN

15

G1

1

1Y

4

5

2A

6

2B

2Y

7

11

3A

10

3B

3Y

9

14

4A

13

4B

4Y

12

A /B

1

OE

MUX

2

1A

1

3

1B

EN

15

G1

1

1Y

4

5

2A

6

2B

2Y

7

11

3A

10

3B

3Y

9

14

4A

13

4B

4Y

12

A /B

1

SN54ALS257A, SN74ALS257A,

SN74AS257

SN54ALS258A, SN74ALS258A,

SN74AS258

† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

Pin numbers shown are for the D, J, and N packages.

logic diagrams (positive logic)

4Y

3Y

2Y

1Y

A/B

OE

4B

4A

3B

3A

2B

2A

1B

1A

4

2

3

7

5

6

9

11

10

12

14

13

1

15

4Y

3Y

2Y

1Y

A /B

OE

4B

4A

3B

3A

2B

2A

1B

1A

4

2

3

7

5

6

9

11

10

12

14

13

1

15

SN54ALS257A, SN74ALS257A,

SN74AS257

SN54ALS258A, SN74ALS258A,

SN74AS258

Pin numbers shown are for the D, J, and N packages.