型號 / 廠家，封裝，批號，備注，訂購

DM74LS248 / National Semiconductor,Datasheet,06/07+,BCD to 7-Segment Dec 訂購 PDF文檔

DM74LS251N? / ,,最新批號,原裝現(xiàn)貨 訂購 PDF文檔

DM74LS253N? / ,,最新批號,原裝現(xiàn)貨 訂購 PDF文檔

DM74LS257A / MAT,DIPT,08/09+,正品原裝貨 訂購 PDF文檔

DM74LS257BCW / Fairchild Semiconductor,Datasheet,07+,3-STATE Quad 2-Data 訂購 PDF文檔

DM74LS197M / National Semiconductor,Datasheet,06/07+,4-Bit Binary Up Coun 訂購 PDF文檔

DM74LS258B / National Semiconductor,Datasheet,07+,TRI-STATE Quad 2-Dat 訂購 PDF文檔

DM74LS20N? / ,,最新批號,原裝現(xiàn)貨 訂購 PDF文檔

DM74LS240CW / Fairchild Semiconductor,Datasheet,07+,Octal 3-STATE Buffer 訂購 PDF文檔

DM74LS265A / National Semiconductor,Datasheet,07+,Hex TRI-STATE Buffer 訂購 PDF文檔