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Altera_Forum
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15 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...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Yes, the external pull-up operation is rather slow, unless low, power consuming resistors are used. Are you sure, that you actually need high levels above 3.5V?