the tusb8040 is usb 3.0 compliant hub available in an 80-pin qfp package. the device is designed for operation over the industrial temperature range of 40c to 85c. the tusb8040 provides simultaneous superspeed and high-speed/full-speed connections on the upstream port and provides superspeed high-speed full-speed or low-speed connections on the downstream ports. when the upstream port is connected to an electrical environment that only supports high-speed or full-speed/low-speed connections superspeed connectivity is disabled on the downstream ports. when the upstream port is connected to an electrical environment that only supports full-speed/low-speed connections superspeed and high-speed connectivity are disabled on the downstream ports. view all in datasheet