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Altera_Forum's avatar
Altera_Forum
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13 years ago

interfacing Flex10k10 to CMOS

Hi There! Bit of a dumb question but can I directly interface a 10k10 to a 5v CMOS device or do I need to use pull-ups? From what I can tell it outputs *just* above 3.5v (on a 5v core/IO voltag...
Altera_Forum's avatar
Altera_Forum
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13 years ago

You're right, I meant figure 19 :-) p47 is for 10k50v and 10k130v btw.

Maybe I'm making this more complicated than it is and it basically boils down to this question:

For an all 5v system interfacing to CMOS components, do I select: TTL or LVCMOS/LVTTL? I'm guessing the latter as that would drive VOH up higher than 2.4v (TTL) but the 'low voltage' throws a wrench into that and is (perhaps?) not relevant?

-Mux