- #1
EvLer
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I just want to be sure about this:
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(IOHmax/IIH, IOLmax/IIL)
where IOHmax is the max output current at high state;
IOLmax ... in low state;
IIH is input current at high state;
IIL 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.
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(IOHmax/IIH, IOLmax/IIL)
where IOHmax is the max output current at high state;
IOLmax ... in low state;
IIH is input current at high state;
IIL 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.