- #1

EvLer

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i have a spec sheet for CMOS with CMOS and TTL loads. The question is whether CMOS could drive TTL, so the general formula is

fan-out = min(I

_{OHmax}/I

_{IH}, I

_{OLmax}/I

_{IL})

where I

_{OHmax}is the max output current at high state;

I

_{OLmax}... in low state;

I

_{IH}is input current at high state;

I

_{IL}is .... at low state;

so I think I need to figure out which parameters are of CMOS and which are of TTL. So here's what i think: output parameters have to be of CMOS and input parameters have to be of TTL.

Is it correct?

Thanks much.