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Datasheet Replacement Marking Code
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25LC128
DM74AS257 (5)DM74AS25 (8)DM74AS2 (31)DM74AS (126)DM74A (398)DM74 (459)DM7 (467)
Fairchild Semiconductor

DM74AS257N

Multiplexer 4 x 2:1 16-PDIP
Fairchild Semiconductor

DM74AS257M

Multiplexer 4 x 2:1 16-SOIC
Fairchild Semiconductor

DM74AS257MX

Multiplexer 4 x 2:1 16-SOIC
Fairchild Semiconductor

DM74AS257SJ

Multiplexer 4 x 2:1 16-SOP
Fairchild Semiconductor

DM74AS257SJX

Multiplexer 4 x 2:1 16-SOP
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