The 2to1 provides the final 16to 1 mutiplexed output, OK? Read More How do you design an 16-to-1 multiplexer using a 4-to-1 multiplexer? The output from 1st 8to1 is D0 on the 2to1, the output from the 2nd 8to1 is D1 on the 2to1 and S3 to the 2to1. Construct a 16-to-1-line multiplexer with two 8-to-1-line multiplexers and one 2-t0-1-line multiplexer? You just need to becareful that the 4-1's do not drive the output at the same time -this could result in large current spikes on GND and VCC, and youdon't want that - open collector outputs, as opposed to totem poleoutputs, are a wonderful solution to this problem - it all dependson required propagation delay time.
If the 4-1's have tri-state ouputs, you can eliminate the 2-1, anduse the third selector input, and its complement, to drive the two4-1's. The 8 inputs would be connected to the two 4-1's using two of theselector inputs and the outputs of the two 4-1's would be connectedto the 2-1 using the third selector input. You can design an 8-to-1 multiplexer using two 4-to-1multiplexers, and a 2-1 multiplexor.
Computer Networking / Electronics Engineering / Computer Aided Design
0 kommentar(er)
