型号 / 厂家，封装，批号，备注，订购

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74AC191PC_F091 / FSC,,07+,全新原装热卖 订购 PDF文档

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74AC191SC_NL / FSC,,07+,全新原装热卖 订购 PDF文档

74AC191SCQR / National Semiconductor,Datasheet,07+,Up/Down with 订购 PDF文档

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74AC191-R / ,,最新批号,原装现货 订购 PDF文档

74AC191SCX_NL / Fairchild Semiconductor,Datasheet,07+,Up/Down with 订购 PDF文档