Digital Circuit Fundamentals 2 Unit 4 – Multiplexer and Demultiplexer
Exercise 2 – 1-Line-to-8-Line Demultiplexer
EXERCISE OBJECTIVE
When you have completed this exercise, you will have a working knowledge of a demultiplexer.
You will gain this knowledge by exercising a 1-line-to-8-line demultiplexer.
DISCUSSION
- The 74LS155 data demultiplexer is a monolithic IC with full on-chip binary decoding and
strobe inputs which allows the IC to route the input data to a selected output line. - The demultiplexer has 8 output lines.
- The output select control lines select one output at a time.
- The select lines of the demultiplexer are hardwired to the output lines on the COUNTER
circuit.