74LS154 4 to 16 Line Decoder/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. 74LS154 4-line-to-16-line decoders utilize TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1, and G2 are LOW.

74LS154 Features

  • Decodes 4 binary-coded inputs into one of 16 mutually exclusive outputs
  • Performs the demultiplexing function by distributing data from one input line to any one of 16 outputs
  • Input clamping diodes simplify system design
  • High fan-out, low-impedance, totem-pole outputs
  • Typical power dissipation 45 mW

74LS154 Specifications

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

74LS154 Pinout Diagram

74LS154 Pin Description

Pin NoPin NameDescription
10Output Pin 0
21Output Pin 1
32Output Pin 2
43Output Pin 3
54Output Pin 4
65Output Pin 5
76Output Pin 6
87Output Pin 7
98Output Pin 8
109Output Pin 9
1110Output Pin 10
1311Output Pin 11
1412Output Pin 12
1513Output Pin 13
1614Output Pin 14
1715Output Pin 15
18G1Strobe Input Pin G1
19G2Strobe Input Pin G2
20DData Input Pin D
21CData Input Pin C
22BData Input Pin B
23AData Input Pin A
24VCCPositive Supply

74LS154 Circuit


  • Connect a single source to multiple destinations

74LS154 Alternative Equivalent


Download 74LS154 4 to 16 Line Decoder/Demultiplexer Datasheet from the link given below.