pld stands for programmable logic device. A 7432 is a fixed
logic device, actually 4 instances of a 2 input or gate. A pld can
implement the equivalent 7400 series components as required. A
popular pld is the 22V10.
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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?"