I wonder, is there a table somewhere where I can find out impedance of drivers of various HCMOS series?
I am specifically interested in AC, ACT, LVC and HC series. I guess input impedance is very high for all CMOS-based series, so I am interested in drivers impedance only.
I need that to properly terminate long trances, and I guess different series would require a bit different termination.
TI do some good app notes on their logic families, it's just a matter of finding the right one :-)
I have one here on my computer called "Designing with Logic - SDYA009C" containing the table shown below. It's a little old now (1997) but I'm pretty sure there will be a similar app note for the newer chips. Here is a TI page with tons of logic related documents.
The HCMOS design guide and Input/Output characteristics might be of use.
