型号 / 厂家，封装，批号，备注，订购

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SN75LBC174A / Texas Instruments,Datasheet,06/07+,RS-422 订购 PDF文档

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SN75LBC174DW(SMD)D/C05 / ,,最新批号,原装现货 订购 PDF文档

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SN75LBC176ADG4 / Texas Instruments,Datasheet,06/07+,Differential Bus Tra 订购 PDF文档