Having read the basics on what a multiplexer does, I'd like to test a CD4053BE, which is a triple 2-channel. From the truth table, it seems that controls A, B and C decide between ax/ay, bx/by and cx/cy inputs, respectively, and I suppose the outputs are a, b and c. Apparently, the INH is somewhat of a general control (am I right so far?). But what are the in/out and out/in thingies on the connection diagram? And what are the VEE, VDD and VSS terminals?