型号 / 厂家，封装，批号，备注，订购

DM74ALS502N / NATIONAL SEMICONDUCTOR,,08/09+,全新原装深圳库存 订购 PDF文档

DM74ALS520N_Q / ,,最新批号,原装现货 订购 PDF文档

DM74ALS520WM / NATIONAL SEMICONDUCTOR,,08/09+,全新原装深圳库存 订购 PDF文档

DM74ALS520WMX / NATIONAL SEMICONDUCTOR,,08/09+,全新原装深圳库存 订购 PDF文档

DM74ALS520WN / FAIRCHILD,,08/09+,010-62106431 订购 PDF文档

DM74ALS521N / TOS,SMD,08/09+,全新原装深圳库存 订购 PDF文档

DM74ALS521N_Q / ,,最新批号,原装现货 订购 PDF文档

DM74ALS521WM_Q / ,,最新批号,原装现货 订购 PDF文档

DM74ALS521WMX / NATIONAL SEMICONDUCTOR,,08/09+,全新原装深圳库存 订购 PDF文档

DM74ALS5245SJ / NATIONAL SEMICONDUCTOR,,08/09+,全新原装深圳库存 订购 PDF文档