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Datasheet Replacement Marking Code
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25LC128
74F521 (7)74F52 (9)74F5 (64)74F (1067)
Fairchild Semiconductor

74F521PC

Magnitude Comparator 8 Bit Active Low Output A=B 20-PDIP
Fairchild Semiconductor

74F521SC

Magnitude Comparator 8 Bit Active Low Output A=B 20-SOIC
Fairchild Semiconductor

74F521MSA

Magnitude Comparator 8 Bit Active Low Output A=B 20-SSOP
Fairchild Semiconductor

74F521SJ

Magnitude Comparator 8 Bit Active Low Output A=B 20-SOP
Fairchild Semiconductor

74F521SJX

Magnitude Comparator 8 Bit Active Low Output A=B 20-SOP
Fairchild Semiconductor

74F521MSAX

Magnitude Comparator 8 Bit Active Low Output A=B 20-SSOP
Fairchild Semiconductor

74F521SCX

Magnitude Comparator 8 Bit Active Low Output A=B 20-SOIC
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