型号 / 厂家，封装，批号，备注，订购

SN54LS698 / Texas Instruments,Datasheet,07+,SYNCHRONOUS UP/DOWN 订购 PDF文档

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SN54LS698J / Texas Instruments,Datasheet,06/07+,SYNCHRONOUS UP/DOWN 订购 PDF文档

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SN54LS69FK / Texas Instruments,Datasheet,06/07+,4-Bit Binary Up Coun 订购 PDF文档

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