74151 8-to-1 line data selector/multiplexer with complementary outputs. +----------+ D3 |1 +--+ 16| VCC D2 |2 15| D4 D1 |3 14| D5 D0 |4 74 13| D6 Y |5 151 12| D7 /Y |6 11| S0 /EN |7 10| S1 GND |8 9| S2 +----------+ [This information is part of the GIICM]