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if you want to use 8*3 encoder than you must the design the circuit according to variable and with the help of k-map and you can not construct the circuit of 8*3 encoder using 7432 (which is or gate ic) only. you need AND gate 7408 and may be NOT 7404 gate according to design.

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Q: How do you use ic 7432 as an 8 to 3 bit encoder?
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Answering "What is differences between pld and mixed logic gatessuch as the 7400 7432 ic logic device name one pld device?"


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