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1 SN74LS139AD DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS 655K TI 4145788
2 SN74LS139ADE4 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS 655K TI 4747555
3 SN74LS139ADR DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS 655K TI 4145787
4 SN74LS139ADRE4 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS 655K TI 4145786