The maximum cable length supported by the CY7C68033-56LTXC is 3 meters (10 feet) for full-speed devices and 1 meter (3.3 feet) for low-speed devices.
To implement a custom USB device class, you need to modify the device firmware to handle the custom class requests and responses. You can use the Cypress Semiconductor's EZ-USB FX2LP/FX2 Development Kit to develop and test your custom device class.
No, the CY7C68033-56LTXC is not designed to be used as a USB hub. It is a USB peripheral controller that can be used to implement a USB device, but it does not have the necessary hardware and firmware to function as a USB hub.
The CY7C68033-56LTXC has built-in support for USB suspend and resume. You can use the chip's power management features to handle suspend and resume requests from the host. You can also use the Cypress Semiconductor's EZ-USB FX2LP/FX2 Development Kit to develop and test your suspend and resume implementation.
The CY7C68033-56LTXC supports a maximum data transfer rate of 480 Mbps (high-speed USB).