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Altera_Forum
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16 years ago

VCCIO EPM7128SLC84-15 and 5 Volt outputs: HELP!

I'm using a MAX EPM7128SLC84-15 and need 5V logic outputs. So, the CPLD is wired with all VCC=5V and all the VCCIO = 5V too. Yet the outputs show 3.3V on the 'scope. I believed the Data Sheet page...
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Altera_Forum
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16 years ago

Unfortunately yes. The signals interface with 5V CMOS logic and some signals needed the extra energy to drive it.

Thanks again for your help - and the visit offer's genuine!