BU9206 model or LSC507804P datasheet

Hi Im trying to make a mouse input device from the ground up but I cant get the BU9206 part anywhere!

On the other hand I open up my logitech wheel mouse and found that it uses the LSC507804P but I cant find its datasheet anywhere?

Any help would be greatly appreciated. Thank You.

The chip in a mouse is almost certain to be a custom programmed micro-controller, so you won't be able to get a datasheet for it. If you want to custom build a mouse (which is a bizzare thing to want to do!) check the MicroChip application notes which give examples of mouse building.