In the package 289-PBGA, the ICs is enclosed.It is used as integrated circuit system of the Tube package.Surface Mount is used for mounting integrated circuit.There are a variety of integrated circuits for this type of 10/100 Integrated Switch.In order to find similar integrated circuit systems, you should search for the family KS8695.This ICs should be applied to Networking and Communications.It is packaged by 289-PBGA (19x19) and is in good working order.