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Altera_Forum
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16 years ago

MAX3000 CPLD bi-directional I/O with 5V pull-up

Hi How would I create a bi-directional pin with open-collector output on a MAX3000 CPLD? I have started the design with an open collector driver driving the pin and a 541 type buffer fo...
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Altera_Forum
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16 years ago

Hi Andre,

Did you have success with this implementation? I too am trying to interface with a 541, open-drain, but Quartus will not configure the 3064 in be open drain for some reason, thus the output pins are still driving 3.3v.

Thanks!