MAX7000s GCLRn Pin input current?

Dear All,

I connect an open drain Pin from a PIC18F448 (RA4) to the GCLRn Pin of a max7000s and to a 4k75 pull-up. When the Altera is not connected and I put a '0' in that pin all goes OK, I see a '0'. But, if I connect the Altera and place a '0' I see an '1'. So here is my question, is the GCLRn pin an special pin?. I mean, does it need more input current than 10uA (from datasheet)?.

Thanks a lot and best regards,

Javi

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javid
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