Lab 2: Decoding, Multiplexing, and Sequencing 2.1 Decoder

2.4 Multiplexer-demultiplexerHere we will construct the circuit of Fig. 4, which consists of a multiplexer (74150) whichsends data to a demultiplexer (74154) over a single line. Hence the two devices communicatevia a serial data link. Sending data over such a serial link clearly saves making manyconnections, which is of practical importance. The MUX and DEMUX use the 4-bit addressbus shown in Fig. 4 to communicate whichdatachannel is active. In your circuit, the addresscode will be selected using a counter (7493), as was done earlier. Again, the 7-segment displayis used to display this address.+5 V10725118binary (BCD) input4 bits 7 outputs (a-g)74939121a0a1a2a374477-segment displayaddress select in14circuit board+5 V24data indata in 15data in 01617etc22231etc787415024 9 12+5 V1113141510a3a2a1a0address bus7404data link20212223187415412 1917 output 1514 etc13113 etc21output 0LED logicindicatorsFigure 4: Schematic for serial data transmission via MUX/DEMUX.Connect the circuit shown in Fig. 4. The data to be transmitted (\data in") can againbe a slow TTL pulse train. And a debounced button input to the 7493 counter can againbe used to select the address. The inverter is used to keep input and output data in phase.Increment the counter to select output channel 5. Which data pin(s) on the 74150 (data in)and 74154 (data out) have been selected? Verify this with a logic probe or LED. Now inputdata to this active 74150 pin. Does the input data get faithfully transmitted to the correctoutput? Move the data input to a dierent MUX pin. Now select this channel. Does datanow appear at the 74154? At which channel?4