4-53

FAST AND LS TTL DATA

1-OF-8 DECODER/

DEMULTIPLEXER

The MC54/74F138 is a high speed 1-of-8 Decoder/Demultiplexer. This de-

vice is ideally suited for high speed bipolar memory chip select address de-

coding. The multiple input enables allow parallel expansion to a 1-of-24 de-

coder using just three F138 devices or to a 1-of-32 decoder using four F138s

and one inverter.

CONNECTION DIAGRAM DIP (TOP VIEW)

15

16

14

13

12

11

10

2

1

3

4

5

6

7

VCC

9

8

O0

O1

O2

O3

O4

O5

O6

A0

A1

A2

E1

E2

E3

O7

GND

6

5

LOGIC DIAGRAM

VCC = PIN 16

GND = PIN 8

= PIN NUMBERS

3

A2

A1

A0

E1 E2 E3

O7

O5

O4

O3

O2

O1

O0

O6

2

1

4

7

9

10

11

12

13

14

15

4 5 6

1 2 3

MC54FXXXJ

Ceramic

MC74FXXXN

Plastic

MC74FXXXD

SOIC

MC54/74F138

1-OF-8 DECODER/

DEMULTIPLEXER

FAST

™ SHOTTKY TTL

J SUFFIX

CERAMIC

CASE 620-09

N SUFFIX

PLASTIC

CASE 648-08

16

1

16

1

ORDERING INFORMATION

16

1

D SUFFIX

SOIC

CASE 751B-03

LOGIC SYMBOL

VCC = PIN 16

GND = PIN 8

1 2 3

O0 O1 O2 O3 O4 O5 O6 O7

15 14 13 12 11 10 9 7

A0 A1 A2