324-LBGA package is used to save board space.To pack telecommunications equipment, the way of Tray is used.The mounting type is Surface Mount.Telecom switching's base part number of PSB21521 can be a method to find more related parts.There are many similarities between it and the electronic parts of the INCA? series.
PSB 21521 E V1.4-G Features
Available in the 324-LBGA package
PSB 21521 E V1.4-G Applications
There are a lot of Infineon Technologies PSB 21521 E V1.4-G Telecom applications.