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Altera_Forum's avatar
Altera_Forum
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15 years ago

Pin Damaged question

hello, we are using altera Cyclone1 EP1C6.. we use the IC in an I/O application.. the I/O pins of the IC are connected to external device and user can touch these pins by touching the end ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I know the datasheet. You can use it with lower VCC, but the Z-diode won't limit the supply voltage above 3.3V. The clamp diodes are working anyway. You may be able to find dedicated 3.3V protection components.

You didn't yet tell about the involved interface standard and why you don't see an option to place any kind of buffer between the FPGA and the external connector.