74543 8-bit 3-state noninverting registered transceiver. +----------+ /LEBA |1 +--+ 24| VCC /GBA |2 23| /CEBA A1 |3 22| B1 A2 |4 21| B2 A3 |5 20| B3 A4 |6 74 19| B4 A5 |7 543 18| B5 A6 |8 17| B6 A7 |9 16| B7 A8 |10 15| B8 /CEAB |11 14| /LEAB GND |12 13| /GAB +----------+ [This information is part of the GIICM]