SN74LS139AD SN74LS139A SN74LS139 SN74LS138P SN74LS138NSR SN74LS138NS SN74LS138NE4 SN74LS138N. SN74LS138N SN74LS138MR1SN74LS139ADR
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厂家:Texas Instruments Dual 2-line to 4-line decoders / demultiplexers 16-SOIC 0 to 70

