型號(hào) / 廠家，封裝，批號(hào)，備注，訂購(gòu)

DM74LS490N / National Semiconductor,Datasheet,07+,BCD-Output Decade Up 訂購(gòu) PDF文檔

DM74LS491 / National Semiconductor,Datasheet,06/07+, 訂購(gòu) PDF文檔

DM74LS491A / National Semiconductor,Datasheet,07+,10-Bit 訂購(gòu) PDF文檔

DM74LS491AV / National Semiconductor,Datasheet,07+,10-Bit 訂購(gòu) PDF文檔

DM74LS498A / National Semiconductor,Datasheet,07+,Octal Shift Register 訂購(gòu) PDF文檔

DM74LS498AJ / National Semiconductor,Datasheet,06/07+,Octal Shift Register 訂購(gòu) PDF文檔

DM74LS498AN / National Semiconductor,Datasheet,06/07+,Octal Shift Register 訂購(gòu) PDF文檔

DM74LS498J / National Semiconductor,Datasheet,06/07+,8-Bit Shift Register 訂購(gòu) PDF文檔

DM74LS502 / National Semiconductor,Datasheet,07+,8-Bit Successive App 訂購(gòu) PDF文檔

DM74LS502M / National Semiconductor,Datasheet,06/07+,Successive Approxima 訂購(gòu) PDF文檔