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PLUS153系列可编程逻辑器件逻辑结构的介绍

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  • 标      签: 结构介绍

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Philips Semiconductors PLAs are particularlyuseful in the design of wide addressdecoders and random logic replacement.The primary advantage PhilipsSemiconductors brings to these applicationswith their PLA devices is product termsharing, which is made possible via the twoprogrammable arrays graphically shown inFigure 1. The familiar PAL[ architecturesupports a programmable AND array,followed by a fixed OR array. Better than90% of the PAL devices that are availabletoday are limited to 8 input wide OR gates.When pursuing a solution to a complexaddress decoding scheme, this restriction isprohibitive. The Philips Semiconductors PLAdevices support 100% connection of allproduct terms to one or more OR gates.
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