The PTN3393 is a DisplayPort to VGA adapter IC designed to connect a DisplayPort
source to a VGA sink. The PTN3393 integrates a DisplayPort receiver and a high-speed
triple video digital-to-analog converter that supports display resolutions from VGA to
WUXGA. The PTN3393 supports either one or two DisplayPort v1.1a lanes
operating at either 2.7 Gbit/s or 1.62 Gbit/s per lane. The PTN3393 has ‘Flash-over-AUX’
capability enabling simple firmware upgradability in the field.
The PTN3393 supports I²C-bus over AUX per DisplayPort v1.1a specification,
and bridges the VESA DDC channel to the DisplayPort Interface.
The PTN3393 is designed for single supply and minimizes application costs. It can be
powered directly from the DisplayPort source side 3.3 V supply without a need for
additional core voltage regulator. The VGA output is powered down when there is no valid
DisplayPort source data being transmitted. The PTN3393 also aids in monitor detection
by performing load sensing and reporting sink connection status to the source.