型号 / 厂家，封装，批号，备注，订购

KS74AHCT174D / Samsung Electronics,Datasheet,06/07+,Hex D-Type Flip-Flop 订购 PDF文档

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KS74AHCT243N / Samsung Electronics,Datasheet,06/07+,Quad Bus-Line Transc 订购 PDF文档

KS74AHCT257 / Samsung Electronics,Datasheet,07+,(KS74AHCT257 / KS74A 订购 PDF文档

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KS74AHCT191D / Samsung Electronics,Datasheet,07+,4-Bit Binary Up-Down 订购 PDF文档