型号 / 厂家，封装，批号，备注，订购

PC74HCT4049D / Philips Semiconductors,Datasheet,06/07+,CMOS-Input Level Tra 订购 PDF文档

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PC74HCT4050 / Philips Semiconductors,Datasheet,06/07+,(It is accurate) Hex 订购 PDF文档

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PC74HCT258D / Philips Semiconductors,Datasheet,06/07+,2-Line Digital Multi 订购 PDF文档

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