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Altera_Forum
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14 years ago

Cyclone III 3.3V LVTTL

Hello, In my design I have a 3.3V LVTTL interface with a silab PLL which operates at 2.5V LVCMOS. The Voh value of the lvcmos is 2.1V and the Vih of the 3.3V LVTTL is 1.7V. Now, since the nois...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Looks O.K. in my opinion. I would do the same. You should check, that no reflections are present, causing possible double clocking.