There is an 8MB memory capacity on the chip. It is encased in an 28-pin package that contains this ic memory chip. In this memory chip, data is processed at a frequency of 66MHz.
AT45DB642D-TU Features
28 Pins Freguency at 66MHz 66MHz terminals
AT45DB642D-TU Applications
There are a lot of Microchip AT45DB642D-TU Memory applications.