SN74AHCT86 Quad 2-Input Exclusive OR Gates Texas Instruments SN74AHCT86 2-Input Exclusive OR Gates are quadruple 2-input exclusive-OR gates. These devices perform the Boolean function Y = A × B or Y = AB + A B in positive logic. The Texas Instruments SN74AHCT86 has inputs that are TTL-voltage compatible, which allows up translation from 3.3V to 5V.