型号 / 厂家，封装，批号，备注，订购

HD74HC242FP / Hitachi Semiconductor,Datasheet,06/07+,Quad Bus-Line Transc 订购 PDF文档

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HD74HC251RP / Renesas Technology,Datasheet,07+,1-of-8 line Data Sel 订购 PDF文档

HD74HC253 / Hitachi Semiconductor,Datasheet,07+,Dual 4-to-1-line Dat 订购 PDF文档

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HD74HC244RPE / ,,最新批号,现货库存 订购 PDF文档

HD74HC257RP / Renesas Technology,Datasheet,07+,Quad. 2-to-1 line Da 订购 PDF文档

HD74HC258RP / Renesas Technology,Datasheet,06/07+,Quad. 2-to-1 line Da 订购 PDF文档