Download the NT2GC72C89B2NJ-CG datasheet PDF.
This datasheet also covers the NT2GC72B89B0NJ variant, as both devices belong to the same registered ddr3 sdram dimm family and are provided as variant models within a single manufacturer datasheet.
Note: The manufacturer provides a single datasheet file (NT2GC72B89B0NJ-NanyaTechnology.pdf) that lists specifications for multiple related part numbers.