There is a package called 288-LFBGA that contains it, and you can find it there. It's packaged in the shape of a Tray. The device should work as long as it is powered by a 3.3V 5VV power source.
PCI7620ZHK Features
PCI7620ZHK Applications
There are a lot of Rochester Electronics, LLC PCI7620ZHK Controllers Interface ICs applications.