型号 / 厂家，封装，批号，备注，订购

DM74S244CW / Fairchild Semiconductor,Datasheet,07+,Octal 3-STATE Buffer 订购 PDF文档

DM74S244J? / ,,最新批号,原装现货 订购 PDF文档

DM74S241N? / ,,最新批号,原装现货 订购 PDF文档

DM74S251N? / ,,最新批号,原装现货 订购 PDF文档

DM74S257 / Fairchild Semiconductor,Datasheet,06/07+,3-STATE Quad 1-of-2 订购 PDF文档

DM74S257CW / Fairchild Semiconductor,Datasheet,07+,Quad 3-STATE 2-to-1 订购 PDF文档

DM-74S257N. / ,,,原装现货 订购 PDF文档

DM74S270J / National Semiconductor,Datasheet,07+,General Purpose 订购 PDF文档

DM74S271J / National Semiconductor,Datasheet,07+,General Purpose 订购 PDF文档

DM74S271N / National Semiconductor,Datasheet,07+,General Purpose 订购 PDF文档