74F521 Datasheet - Fairchild

74F521 8-Bit Identity Comparator April 1988 Revised August 1999 74F521 8-Bit Identity Comparator General Description The 74F521 is an expandable 8-bit comparator.

It compares two words of up to eight bits each and provides a LOW output when the two words match bit for bit.

The expansion input IA=B