型号 / 厂家，封装，批号，备注，订购

SN74LS642NE4 / Texas Instruments,Datasheet,07+,Octal bus transceive 订购 PDF文档

SN74LS642NS / TI,,08/09+,010-66001623/66001621 订购 PDF文档

SN74LS642NSR / ,,08/09+,全新原装现货库存 订购 PDF文档

SN74LS643-1P / MIT,,08/09+,特价 订购 PDF文档

SN74LS643N / ,,08/09+,全新原装深圳库存 订购 PDF文档

SN74LS644-1N / UMC,DIP,08/09+,全新原装深圳库存 订购 PDF文档

SN74LS644-1P / MIT,,08/09+,特价 订购 PDF文档

SN74LS644N / UMC,DIP,08/09+,全新原装深圳库存 订购 PDF文档

SN74LS645 / UMC,DIP,08/09+,全新原装深圳库存 订购 PDF文档

SN74LS645-1DWE4 / Texas Instruments,Datasheet,07+,Octal bus transceive 订购 PDF文档