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Altera_Forum
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12 years ago

5V input COMPATIBLE ALTERA FPGA FAMILY

Can anyone suggest ALTERA fpga which has 5V compatible Input.
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Some of the X products had built-in clamping diodes which could sink 12mA or so from 5V down to 3.3V. This let you read 5V safely as long as you had a series resistor from your peripheral ic. You would still need a shifter to drive, if VOH's voltage was not high enough for the peripheral's VIH.

I'm curious if any of Altera's products have this feature.