Showing posts with label multiplexer. Show all posts
Showing posts with label multiplexer. Show all posts
Saturday, October 5, 2013
Multiplexer with TTL IC 74251
Actually you can not bother to design a multiplexer using logic gates because it has many special IC which functioned for a multiplexer.
One of the TTL ICs from the family that you can use to fulfill the function of a multiplexer is IC 74 251. At the IC there are 8 input channels and 3-bit selector and the other lane as a control reset and inverting output. As a note if you are using TTL ICs for your electronic circuit, the voltage supply that is allowed a maximum of 5 volts. So you can be more familiar with the workings of this multiplexer ic, IC74251 consider the truth table below:
C | B | A | G | Y | W |
X | X | X | 1 | Z | Z |
0 | 0 | 0 | 0 | D0 | D0’ |
0 | 0 | 1 | 0 | D1 | D1’ |
0 | 1 | 0 | 0 | D2 | D2’ |
0 | 1 | 1 | 0 | D3 | D3’ |
1 | 0 | 0 | 0 | D4 | D4’ |
1 | 0 | 1 | 0 | D5 | D5’ |
1 | 1 | 0 | 0 | D6 | D6’ |
1 | 1 | 1 | 0 | D7 | D7’ |
Z = High impedance (off) | |||||
D0,D1…D7 = Representing the output of the input lines D | |||||
Saturday, September 14, 2013
Multiplexer Circuit With Logic Gate
Multiplexer circuit with a logic gate is a multiplexer circuit that utilizes a combination of logic gates.
The working principle of the multiplexer circuit above is:
1. Value of bit 00 from the selector will choose the path of the first input as the output
2. Value of bit 01 of the selector will choose the path of the second input as output
3. Value of bit 10 of the selector selects the third input lines as output
4. Value of bit 11 of the selector will choose the four input channels as output
5. As long as there is no change in the bit selector logic condition of the output logic state also will not be amended.
6. If the line selector is connected with a series of counter-up the output to be obtained will represent the input lines in sequence.
7. So it can be concluded that the usefulness of the implementation of a multiplexer function is to satisfy the principle of a simple data distribution. Thus, with multiplexers is possible to transmit data remotely using only one connection.
[Continue Reading]
Where the above example can be seen that the circuit has 2 bit selector and 4 input lines. You can make a circuit with more input channels by increasing the number of bits of the selector. And also you can use a combination of gates based on your own design with reference to the previous multiplexer truth table you should specify. So by making a truth table in advance you can easily create a series of logic gates.
The working principle of the multiplexer circuit above is:
1. Value of bit 00 from the selector will choose the path of the first input as the output
2. Value of bit 01 of the selector will choose the path of the second input as output
3. Value of bit 10 of the selector selects the third input lines as output
4. Value of bit 11 of the selector will choose the four input channels as output
5. As long as there is no change in the bit selector logic condition of the output logic state also will not be amended.
6. If the line selector is connected with a series of counter-up the output to be obtained will represent the input lines in sequence.
7. So it can be concluded that the usefulness of the implementation of a multiplexer function is to satisfy the principle of a simple data distribution. Thus, with multiplexers is possible to transmit data remotely using only one connection.
Subscribe to:
Posts (Atom)