74155 IC Dual 2-to-4 Line Decoders/Demultiplexers DIP-16

74155 IC Dual 2-to-4 Line
Decoders/Demultiplexer
DIP-16

The 74155 IC Dual 2-to-4 Line Decoders/Demultiplexes DIP-16, designed for digital logic and data routing applications. It contains two independent 2-to-4 decoders that can also function as demultiplexes, providing flexibility in digital circuit design. Each decoder accepts two binary select inputs and provides four mutually exclusive active-low outputs. Built with TTL (Transistor-Transistor Logic) technology, the 74155 offers fast switching, high noise immunity, and reliable performance. It is widely used in address decoding, data distribution, memory selection, and digital control systems in both educational and industrial applications.

Features

Contains two independent 2-to-4 line decoders/demultiplexes.

Active-low outputs for easy interface with TTL and CMOS logic.

Can be used as a decoder or demultiplexer.

High-speed TTL logic performance.

Low power consumption and high noise immunity.

Enable inputs allow flexible control and cascading capability.

Wide operating voltage range (typically 4.75V to 5.25V).

Standard 16-pin dual in-line (DIP) package for easy prototyping.

Compatible with other TTL logic ICs.

Ideal for address decoding, data routing, and logic control applications.

Pinout Configuration

Pin No.

Pin Name

Description

1

1C

Input C (Control Input for Decoder 1)

2

1G

Enable Input (Active LOW) for Decoder 1

3

B

Binary Input B (Shared between both decoders)

4

1Y3

Output Y3 of Decoder 1 (Active LOW)

5

1Y2

Output Y2 of Decoder 1 (Active LOW)

6

1Y1

Output Y1 of Decoder 1 (Active LOW)

7

1Y0

Output Y0 of Decoder 1 (Active LOW)

8

GND

Ground (0V)

9

2Y0

Output Y0 of Decoder 2 (Active LOW)

10

2Y1

Output Y1 of Decoder 2 (Active LOW)

11

2Y2

Output Y2 of Decoder 2 (Active LOW)

12

2Y3

Output Y3 of Decoder 2 (Active LOW)

13

A

Binary Input A (Shared between both decoders)

14

2G

Enable Input (Active LOW) for Decoder 2

15

2C

Input C (Control Input for Decoder 2)

16

VCC

Supply Voltage (+5V)

Specifications

Parameter

Value / Description

IC Function

Dual 2-Line to 4-Line Decoder / Demultiplexer

Logic Family

TTL (Transistor-Transistor Logic)

Number of Decoders

2 Independent Decoders

Number of Inputs (per Decoder)

2 Data Inputs + 1 Enable Input

Number of Outputs (per Decoder)

4 Active-Low Outputs

Output Type

Active Low

Propagation Delay Time

20 nsec

Operating Voltage (Vcc)

4.75V to 5.25V

Typical Supply Voltage

5V

Input HIGH Voltage (VIH) Min

2.0V

Input LOW Voltage (VIL) Max

0.8V

Output HIGH Voltage (VOH) Min

2.4V

Output LOW Voltage (VOL) Max

0.4V

Power Dissipation

80 mW

Operating Temperature Range

0C to +70C

Package Type

DIP-16 (Dual In-line Package)

Mounting Type

Through Hole

Logic Compatibility

TTL and CMOS

Applications

Memory address decoding in microprocessor systems.

Data routing and signal demultiplexing circuits.

Digital logic and control circuit design.

Binary-to-decimal decoding applications.

Input/output selection in digital systems.

Multiprocessor communication and data distribution.

Display decoding and segment selection circuits.

Logic level translation and control signal generation.

Embedded systems and automation projects.

Educational experiments and digital logic training kits.

Package Contents

1 x
74155 IC Dual 2-to-4 Line Decoders/Demultiplexer DIP-16

Datasheet

74155