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Altera_Forum's avatar
Altera_Forum
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9 years ago

Cyclone III 3.3V LVTTL/LVCMOS input impedance

I have a customer that has an unusual driver arrangement for a couple Cyclone III 3.3V LVTTL/LVCMOS inputs and they want to know what the Cyclone III input impedance will be. Digging through the Alt...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Your comment is rather unspecific und doesn't actually tell which kind of model parameters you are looking for and in which frequency and input voltage range you want to model the input pin behavior. There are different quantitative data available from Altera. In particularly you have:

- datasheet specifications

- IBIS files

- HSPICE models (encrypted)