In the FBGA package, you can find it. There are terminations of type 256 in it. Using 256 pins, the device operates. It is recommended to set the supply voltage to 1.2V for maximum efficiency. Device's IC has a telecom type of ETHERNET TRANSCEIVER.
BCM5396IFBG Features
BCM5396IFBG Applications
There are a lot of Broadcom Limited BCM5396IFBG Controllers Interface ICs applications.