型号 / 厂家，封装，批号，备注，订购

74H20AN / SIG,,,原装正品 订购 PDF文档

74h20n / ti,,08/09+,全新原装深圳库存 订购 PDF文档

74H21DC / Various,Datasheet,07+,4-Input AND-Function 订购 PDF文档

74H21DC9H21 / ,,最新批号,原装现货 订购 PDF文档

74H21H / ,,最新批号,原装现货 订购 PDF文档

74h21n / ti,,08/09+,全新原装深圳库存 订购 PDF文档

74H21PC / Fairchild Semiconductor,Datasheet,07+,Dual 4-input Positiv 订购 PDF文档

74H22 / Fairchild Semiconductor,Datasheet,07+,Full Line Condensed 订购 PDF文档

74H244 / ,,08/09+,全新原装深圳库存 订购 PDF文档

74H251 / ,,最新批号,原装现货 订购 PDF文档