Multiplexers and Demultiplexers
293
control input is in the logic HIGH state, logic LOW in the input waveform appears at output line 15.
In essence, the logic status of the input waveform is reproduced at either line 9 or line 15, depending
on whether the external control signal is LOW or HIGH.
8.4 Application-Relevant Information
Table 8.12 lists commonly used IC type numbers used as multiplexers, encoders, demultiplexers and
decoders. Application-relevant information such as the pin connection diagram, truth table, etc., in
respect of the more popular of these type numbers is given in the companion website.
Table 8.12 Commonly used IC type numbers used as multiplexers, encoders,
demultiplexers and decoders.
IC Type
Function
Logic
number
family
7442
1-of-10 decoder
TTL
74138
1-of-8 decoder/demultiplexer
TTL
74139
Dual 1-of-4 decoder/demultiplexer
TTL
74145
1-of-10 decoder/driver (open collector)
TTL
74147
10-line to four-line priority encoder
TTL
74148
Eight-line to three-line priority encoder
TTL
74150
16-input multiplexer
TTL
74151
Eight-input multiplexer
TTL
74152
Eight-input multiplexer
TTL
74153
Dual four-input multiplexer
TTL
74154
4-of-16 decoder/demultiplexer
TTL
74155
Dual 1-of-4 decoder/demultiplexer
TTL
74156
Dual 1-of-4 decoder/demultiplexer (open collector)
TTL
74157
Quad two-input noninverting multiplexer
TTL
74158
Quad two-input inverting multiplexer
TTL
74247
BCD to seven-segment decoder/driver (open collector)
TTL
74248
BCD to seven-segment decoder/driver with Pull-ups
TTL
74251
Eight-input three-state multiplexer
TTL
74253
Dual four-input three-state multiplexer
TTL
74256
Dual four-bit addressable latch
TTL
74257
Quad two-input non-inverting three-state multiplexer
TTL
74258
Quad two-input inverting three-state multiplexer
TTL
74259
Eight-bit addressable latch
TTL
74298
Dual two-input multiplexer with output latches
TTL
74348
Eight-line to three-line priority encoder (three-state)
TTL
74353
Dual four-input multiplexer
TTL
74398
Quad two-input multiplexer with output register
TTL
74399
Quad two-input multiplexer with output register
TTL
4019
Quad two-input multiplexer
CMOS
4028
1-of-10 decoder
CMOS
40147
10-line to four-line BCD priority encoder
CMOS
4511
BCD to seven-segment latch/decoder/driver
CMOS
4512
Eight-input three-state multiplexer
CMOS
4514
1-of-16 decoder/demultiplexer with input latch
CMOS
(continued overleaf )