PIC24 Open Drain High Speed (lucciodelavegas)

Hi, I need to interface USB bridge (FTDI 234) to PIC24.FT234 will be supplied with his own 3.3V.PIC24 supply can vary from 3.7V to 2.9V depending on the battery voltage. It's work fine with a translator.I'd like to remove it and use a open-drain output. D..