You do not need an external EEPROM for the hub to operate. The hub will enumerate with the default VID/PID of 0x04B4/0x6560. This configuration can be used for test/development purposes.
However, for production, you will need your own VID/PID in order to pass USB compliance and get the hub certified. You can configure the hub to use your VID/PID in one of two ways:
- Add an external EEPROM to your design. The external EEPROM will be programmed to provide your VID/PID, descriptors and other hub configuration settings.
- Purchase your parts with the internal fuse links set to your VID/PID (this is a factory function only and cannot be done after packaging).
Please see the datasheet for more information.