How many programmable cross-point fuses are required in a PLA with 16 inputs,…

2013

How many programmable cross-point fuses are required in a PLA with 16 inputs, 8 outputs, 8 OR gates, and 32 AND gates?

  1. A.

    1032

  2. B.

    776

  3. C.

    1280

  4. D.

    1536

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Correct answer: C

Fuse count:

  • AND plane: Each product term can use each input and its complement, so 32 AND gates × (16 + 16) = 32 × 32 = 1024 fuses.

  • OR plane: Each output OR gate can connect to each AND-gate output, so 8 OR gates × 32 AND outputs = 256 fuses.

  • Total: 1024 + 256 = 1280 fuses.

Final answer: 1280

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