IC快速检索：
型号 / 厂家，封装，批号，备注，订购
74LS289PC / Various,Datasheet,07+,General-Purpose Stat 订购 PDF文档
74LS28FC / Fairchild Semiconductor,Datasheet,07+,NOR-Function Buffer 订购 PDF文档
74LS251W / Raytheon Electronics,Datasheet,07+,8-Line Digital Multi 订购 PDF文档
74LS253FC / Various,Datasheet,07+,4-Line Digital Multi 订购 PDF文档
74LS255W / Raytheon Electronics,Datasheet,07+,4-Line Digital Demul 订购 PDF文档
74LS256DC / Various,Datasheet,07+,Dual 4-Bit D-Type La 订购 PDF文档
74LS257AFC / National Semiconductor,Datasheet,07+,2-Line Digital Multi 订购 PDF文档
74LS257APCQR / ,,最新批号,原装现货 订购 PDF文档