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 also serves as an active LOW enable input.
   
Features
■ Compares two 8-bit words in 6.5 ns typ
■ Expandable to any word length
■ 20-pin package