Rev.2.00, Feb.18.2005, page 1 of 6

HD74LS155

Dual 2-line-to-4-line Decoders / Demultiplexers

REJ03D0440–0200

Rev.2.00

Feb.18.2005

This circuit features dual 1-line-to-4-line demultiprexer with individual strobes and common binary-address input.

When both sections are enabled by the strobes, the common binary-address inputs sequentially select and route

associated input data to the appropriate output of each section. The individual strobes permit activating or inhibiting

each of the 4-bit sections as desired. Data applied to input 1C is inverted through its outputs. The inverter following

the 1C data input permits use as a 3-to-8-line decoder or 1-to-8-line demultiplexer without external gating.

Features

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74LS155P

DILP-16 pin

PRDP0016AE-B

(DP-16FV)

P

—

Note:

Please consult the sales office for the above package availability.

Pin Arrangement

(Top view)

GND

Data 1C

Strobe 1G

Select Input B

Data 2C

Strobe 2G

Select Input A

15

16

1

2

3

4

5

6

7

14

8

9

10

11

12

13

1

G

1C

2

G

2

C

A

B

A

B

A

B

A

B

Outputs

Outputs