7411521 8-bit inverting identity comparator with enable. +----------+ B1 |1 +--+ 20| EN A1 |2 19| A2 B0 |3 18| B2 A0 |4 17| A3 GND |5 7411 16| B3 /A=B |6 521 15| VCC B7 |7 14| A4 A7 |8 13| B4 B6 |9 12| A5 A6 |10 11| B5 +----------+ [This information is part of the GIICM]