型號(hào) / 廠家，封裝，批號(hào)，備注，訂購(gòu)

74LS251W / Raytheon Electronics,Datasheet,07+,8-Line Digital Multi 訂購(gòu) PDF文檔

74LS253FC / Various,Datasheet,07+,4-Line Digital Multi 訂購(gòu) PDF文檔

74LS255W / Raytheon Electronics,Datasheet,07+,4-Line Digital Demul 訂購(gòu) PDF文檔

74LS256DC / Various,Datasheet,07+,Dual 4-Bit D-Type La 訂購(gòu) PDF文檔

74LS257AFC / National Semiconductor,Datasheet,07+,2-Line Digital Multi 訂購(gòu) PDF文檔

74LS257APCQR / ,,最新批號(hào),原裝現(xiàn)貨 訂購(gòu) PDF文檔

74LS257B1 / ,,最新批號(hào),原裝現(xiàn)貨 訂購(gòu) PDF文檔

74LS257BD / MOT,SOP16S,新,021-51872165 訂購(gòu) PDF文檔

74LS257FC / Various,Datasheet,07+,2-Line Digital Multi 訂購(gòu) PDF文檔

74LS257W / Raytheon Electronics,Datasheet,07+,2-Line Digital Multi 訂購(gòu) PDF文檔