A2=B2, etc. FACT DATA DataSheet 4 U .com 5-1 www.DataSheet4U.com MC74AC521 MC74ACT521 LOGIC DIAGRAM A0 B0 A1 B1 A2 B2 A3 B3 OA=B A4 B4 A5 B5 A6 B6 A7 B7 IA=B Please note that this diagram is prov.