74155 2-of-8 inverting decoder/demultiplexer with separate enables. +----------+ 1EN1 |1 +--+ 16| VCC /1EN2 |2 15| /2EN1 S1 |3 14| /2EN2 /1Y3 |4 74 13| S0 /1Y2 |5 155 12| /2Y3 /1Y1 |6 11| /2Y2 /1Y0 |7 10| /2Y1 GND |8 9| /2Y0 +----------+ [This information is part of the GIICM]