256-BBGA is the package that contains the ICs.A package containing integrated circuit is called Tray.Surface Mount is used to mount integrated circuit.Various integrated circuits use this type of Multi-Queue Flow-Control.The IDT72P515*9 family can be searched for similar integrated circuit systems.
IDT72P51549L6BBI Features
IDT72P51549L6BBI Applications
There are a lot of Renesas Electronics America Inc. IDT72P51549L6BBI Specialized ICs applications.