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Datasheet Replacement Marking Code
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25LC128
DM74LS13 (2)DM74LS1 (9)DM74LS (31)DM74 (459)DM7 (467)
Fairchild Semiconductor

DM74LS139N

Decoder/Demultiplexer 1 x 2:4 16-PDIP
Fairchild Semiconductor

DM74LS138M

Decoder/Demultiplexer 1 x 3:8 16-SOIC
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