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Datasheet Replacement Marking Code
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25LC128
74AC52 (10)74AC5 (44)74AC (1333)74A (4425)
Fairchild Semiconductor

74AC521PC

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

74AC521SC

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

74AC521SJ

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

74AC521SJX

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

74AC520SC

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

74AC520SCX

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

74AC521SCX

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

74AC521MTC

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

74AC521MTCX

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

74AC520PC

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