@eDavid:
This! Exactly, thank you!
I spent several hours today on Digikey trying to find something similar but there are a dizzying array of Mux's, De-Mux's in all sorts of configurations, only maybe 50% of which matched what I was expecting.
Using the SN74LV4T125, here's what I am able to come up with:
Does this capture the intent of your suggestion? If yes, thank you. The only thing I am worried about in this system is the rise-time stretching effects of the 1.8V side. I'm using a protocol called BT.656 which is an 8-bit parallel bus clocked at 27MHz, giving a clock period of about 37ns. Is there a way to estimate what the rise-time penalty hit will be using the data from the datasheet? I see threshold levels but not really much in the way of how rise-time is affected on the output side. I understand that without a defined output capacitance, this question is not possible to answer directly, but short of putting the system together and measuring with a scope is there anything else I can do to predict rise time and/or output waveform degradation?