CXDB6CCBM-MA-A comes from the CXMT CXDB line.
As the vendor puts it: LPDDR4X reduces the I/O voltage further than LPDDR4, lowering power in mobile and embedded designs without changing the interface.
Common designs use it in smartphones and tablets.
Its advantage is the managed interface: the host sees a block device rather than raw cells.
Its Density is stated as 8 GB (64 Gbit) in the data sheet.
The data sheet fixes the speed at 4266 Mbps per pin.
Designs that use it usually combine it with a processor and the interfaces the product already provides.