Some common design problems that engineers face when designing USB 3.0 hubs are provided on this slide. USB interoperability is difficult to ensure. USB certification testing is a good way to ensure that a product is designed to meet USB Specification. However, many products are not certified, causing interoperability issue for consumers. Testing for interoperability is difficult; the large installed base includes three generations of USB products, dating back to 1996, making exhaustive testing difficult. USB hubs are specifically prone to interoperability issues as they are expected to work with very large combination of hosts, devices, and operating systems. USB 3.0 is now available on new PCs, but most are equipped with only one or two USB 3.0 ports. As a typical user acquires more USB 3.0 devices such as hard drives, memory stick video cameras and monitors, the available USB 3. 0 port runs out quickly. USB 3.0 signal quality is difficult to ensure. The 5 Gb SuperSpeed signals must be carefully handled to minimize signal degradation due to a lossy channel - consisting of PCB traces, connectors and cables. Most ICs do not do enough to compensate for this degradation, leading to USB compliance failure that may require multiple redesigns to correct a problem. USB port is now commonly used for charging portable devices with many charging standards. A USB port must support multiple standards to meet user expectations. Cypress’ HX3 overcomes all these challenges as it is proven to work with all known host controllers, device classes, and operating systems by repeated testing at every USB plug-fest. HX3 uses Shared Link to double the number of USB ports, creating eight ports from a four-port Hub. In addition, HX3 can drive 2x longer PCB traces vs. the competition while maintaining USB compliance, and HX3 supports all common USB charging standards, including BC v1.2, the Apple Charging Standard, Ghost Charge and ACA-Dock.