What is meant by Wired-AND connection of digital ICs, Computer Engineering

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What is meant by Wired-AND connection of digital ICs?                                                                                                              

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Wired AND digital IC: If input F and F' at two DTL NAND gates linked, the output can be seem as AND operations among the logic output. Since when both the output corresponds to cut-off stages of the transistors, therefore the output will be uninfluenced and logic 1. While any of the outputs corresponds to the saturation situation approx 0.2 volt, the output from common point will be as 0.2 volt. If A and B both input are DTL NAND gate and the C,D all are input for the other ,NAND the output Y on joining F and F' at common terminal like follows: Y=(A.B)'.(C.D)'=(A.B+C.D)'

631_Wired – AND in open collector TTL gates.png

Fig. Wired–AND connection of digital IC


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