There is a package called BGA that contains it, and you can find it there. As you can see, the terminations of the wire are in 400. It is operated by 400 pins. Its IC is of the TELECOM CIRCUIT telecom type.
BCM5320MIPBG Features
BCM5320MIPBG Applications
There are a lot of Broadcom Limited BCM5320MIPBG Controllers Interface ICs applications.