型号 / 厂家，封装，批号，备注，订购

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74F258AFC / National Semiconductor,Datasheet,07+,2-Line Digital Multi 订购 PDF文档

74F258FC / Various,Datasheet,07+,2-Line Digital Multi 订购 PDF文档

74F258L1C / Various,Datasheet,07+,2-Line Digital Multi 订购 PDF文档