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Altera_Forum
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15 years ago

MaxII with 5V TTL Compatibility

Hi all, I am planning to migrate my CPLD design from Lattice series to Altera MAXII series. The only problem I am having at the moment in selecting device is 5V I/O TTL Compatibility. Lattice d...
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Altera_Forum
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15 years ago

I think, the datasheet is clear in this regard. MAX II isn't 5V tolerant, you have to use voltage clamps or similar means to use it with 5V logic level. See Table 2.7, MAX II MultiVolt I/O Support. Devices that compare with Lattice CPLD are e.g. Altera MAX3000.