For space savings, it is available in the QFN package.Tape & Reel (TR) is the package that contains it.Other components that are comparable to it have the base part number AT73C507.
AT73C507-M4UR Features
QFN package
AT73C507-M4UR Applications
There are a lot of Microchip Technology AT73C507-M4UR Microcontroller applications.