PSpice A/D has a library named tex_inst.lib with TI models but not as many as TI for PSpice has.  I've used parts with their models taken from the PSpice for TI library in OrCAD/PSpice A/D so it's possible to do so.  However, the PSpice for TI library folder contains many files.  Each part is in its own .olb file and the model for it is in its own .lib file.  In other words, there is no one .olb file that contains all the parts and only one .lib file that contains all the part models.  You can create these libraries but it would take a lot of work so why bother when you need one or two TI parts per simulation.  Copy the TI part/model library and save it in your own personal folder for use in OrCAD/PSpice.  Be aware that TI does update their library frequently.