5V to 3.3V bus and vice versa

Yes but there are some old devices (hard to find now) who could capable of doing translations. This is all ok but i ll have also to try with PI5C34X245 from pericom also vith PI7C series and with QS32x245 from IDT. Also there is trusted QS3384. I ll get prototype PCB in 20 or so days and i ll report here my investigation. I think that this part of integration of old to new devices is not investigated, or we common people cant find informations. I was thinking that maybe this problem is simple one and noone take time to investigate it. Also production of devices goes up and they just dont want to interface new with old. Also voltages is going down, one day we might talk about interfacing 0.1V to 5V old system... As much I m reading about this for over past months I m thinking about that any bus translation device can work fine if you tune it in some other way, just we need to think about PCB space, and cost of production...