型号 / 厂家，封装，批号，备注，订购

DM74LS290 / National Semiconductor,Datasheet,06/07+,4-Bit Decade 订购 PDF文档

DM74LS290M / National Semiconductor,Datasheet,07+,4-Bit DECADE 订购 PDF文档

DM74LS295A / National Semiconductor,Datasheet,07+,4-Bit Shift Register 订购 PDF文档

DM74LS295AJ / National Semiconductor,Datasheet,07+,4-Bit Shift Register 订购 PDF文档

DM74LS295AM / National Semiconductor,Datasheet,07+,4-Bit Shift Register 订购 PDF文档

DM74LS244N? / ,,最新批号,最新供应 订购 PDF文档

DM74LS245WM? / ,,最新批号,原装现货 订购 PDF文档

DM74LS247 / Fairchild Semiconductor,Datasheet,06/07+,BCD to 7-Segment Dec 订购 PDF文档

DM74LS247M / National Semiconductor,Datasheet,06/07+,V(cc): 4.75 to 5.25V 订购 PDF文档

DM74LS248M / National Semiconductor,Datasheet,06/07+,7-Segment Display Dr 订购 PDF文档