74LS155 Dual 2 To 4 Line Demultiplexer

The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS155 monolithic transistor-transistor-logic (TTL) circuits feature dual 1-line-to-4-line demultiplexers with individual strobes and common binary-address inputs in a single 16-pin package.

74LS155 Features

• Contains Two Demultiplexers To Convert Serial Data to Parallel Output
• Input Clamping Diodes
• Low Power
• Operating Temperature up to 70°C
• Standard TTL Switching Voltages

74LS155 Specifications

Supply Voltage	4.75 – 5.25Vdc
Maximum Clock Frequency	40Mhz
Power Dissipation	2mW/gate @100kHz
Minimum Output Current	8mA
Propagation Delay	10nS
Fan Out (TTL Loads)	20

74LS155 Pinout Diagram

74LS155 Pin Description

Pin No	Pin Name	Description
1	Ea	Enable Input Pin a
2	Ea	Enable Input Pin a
3	A1	Data Input Pin of A1
4	O3a	Output Bit 3 of a
5	O2a	Output Bit 2 of a
6	O1a	Output Bit 1 of a
7	O0a	Output Bit 0 of a
8	GND	Ground Pin
9	O0b	Output Bit 0 of b
10	O1b	Output Bit 1 of b
11	O2b	Output Bit 2 of b
12	O3b	Output Bit 3 of b
13	A0	Data Input Pin of A0
14	Eb	Enable Pin b
15	Eb	Enable Pin b
16	VCC	Positive Supply

74LS155 Circuit

Applications

• Connect a single source to multiple destinations

74LS155 Alternative Equivalent

74LS156

Download 74LS155 Dual 2/4 Demultiplexer Datasheet from the link given below.