型号 / 厂家，封装，批号，备注，订购

74LS189PC / Fairchild Semiconductor,Datasheet,07+,64-BIT RANDOM ACCESS 订购 PDF文档

74LS190FC / Various,Datasheet,07+,BCD-Output Decade Up 订购 PDF文档

74LS190W / Raytheon Electronics,Datasheet,07+,BCD-Output Decade Up 订购 PDF文档

74LS191BP / HIT,,,绝对自己库存货 订购 PDF文档

74LS190J / Raytheon Electronics,Datasheet,07+,BCD-Output Decade Up 订购 PDF文档

74LS191DR / TI,3.9mm,00+,0755-83980010 订购 PDF文档

74LS191FC / Various,Datasheet,07+,4-Bit Binary Up-Down 订购 PDF文档

74LS191NA / ,,最新批号,原装现货 订购 PDF文档

74LS192DC / Various,Datasheet,07+,BCD-Output Decade Up 订购 PDF文档

74LS191J / Raytheon Electronics,Datasheet,07+,4-Bit Binary Up-Down 订购 PDF文档