The part number MT47H64M16HR-3 AIT:H is being used as an example:
This breakdown of the part number would apply to the series MT47H from Micron.
“64M16” is the configuration
“HR” is calling out the 84-FBGA package
“-3” is the speed grade
The A would call out the Automotive quality (AEC-Q100)
“IT” would be –40°C to +85°C
“:H” = Revision
“IT:H” would be the non-Automotive quality version of the “AIT:H”
This breakdown can additionally be found on the datasheet on page 2: