型号 / 厂家，封装，批号，备注，订购

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SN74LS148NSRE4 / Texas Instruments,Datasheet,06/07+,10-LINE TO 4-LINE an 订购 PDF文档

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SN74LS157NE4 / Texas Instruments,Datasheet,07+,QUADRUPLE 2-LINE TO 订购 PDF文档