型号 / 厂家，封装，批号，备注，订购

DM74LS469A / National Semiconductor,Datasheet,07+,8-Bit Up/Down e 订购 PDF文档

DM74LS469AJ / National Semiconductor,Datasheet,07+,8-Bit Up/Down e 订购 PDF文档

DM74LS469AN / National Semiconductor,Datasheet,07+,8-Bit Up/Down e 订购 PDF文档

DM74LS471J/A+ / National Semiconductor,Datasheet,07+,Fuse-Programmable PR 订购 PDF文档

DM74LS490 / National Semiconductor,Datasheet,06/07+,Dual Decade 订购 PDF文档

DM74LS490M / National Semiconductor,Datasheet,07+,BCD-Output Decade Up 订购 PDF文档

DM74LS490N / National Semiconductor,Datasheet,07+,BCD-Output Decade Up 订购 PDF文档

DM74LS491 / National Semiconductor,Datasheet,06/07+, 订购 PDF文档

DM74LS491A / National Semiconductor,Datasheet,07+,10-Bit 订购 PDF文档

DM74LS491AV / National Semiconductor,Datasheet,07+,10-Bit 订购 PDF文档