74LS155 Dual 2 To 4 Line Demultiplexer

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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 Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS155 Pinout Diagram

74LS155 Pin Description

Pin NoPin NameDescription
1EaEnable Input Pin a
2EaEnable Input Pin a
3A1Data Input Pin of A1
4O3aOutput Bit 3 of a
5O2aOutput Bit 2 of a
6O1aOutput Bit 1 of a
7O0aOutput Bit 0 of a
8GNDGround Pin
9O0bOutput Bit 0 of b
10O1bOutput Bit 1 of b
11O2bOutput Bit 2 of b
12O3bOutput Bit 3 of b
13A0Data Input Pin of A0
14EbEnable Pin b
15EbEnable Pin b
16VCCPositive 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.