USB4 Specification Merges Thunderbolt 3 and USB With Transfer Speeds up to 40Gb/s
The USB4 specification for a new version of USB was today published by the USB Implementers Forum [PDF] giving us details on what to expect from the next-generation USB architecture following a preview back in March.
USB4 is a major update that "complements and builds upon" the current USB 3.2 2x2 (USB-C) and USB 2.0 architectures. According to the USB-IF, the USB4 architecture is based on Thunderbolt, doubling the maximum bandwidth of USB and allowing for multiple simultaneous data and display protocols.
The USB-IF outlined key specifications of the USB4 architecture, such as 40Gb/s speeds (twice the current 20Gb/s maximum) and backwards compatibility with USB 3.2 and Thunderbolt 3.
- Two-lane operation using existing USB Type-C cables and up to 40Gbps operation over 40Gbps certified cables
- Multiple data and display protocols that efficiently share the maximum aggregate bandwidth
- Backward compatibility with USB 3.2, USB 2.0 and Thunderbolt 3
USB4 will use the same USB-C connector design as USB 3, which means manufacturers will not need to introduce new USB4 ports into their devices.
Apple's newest Macs offer support for USB-C and Thunderbolt 3, which means most Mac users are already experiencing USB4 speeds when using Thunderbolt 3 cables and devices, but USB4 will make Thunderbolt-style speeds the new default and it will lower the cost of devices that use these faster transfer speeds.
USB Power Delivery will be required in devices built for USB4, which also means we can expect to see higher-powered chargers with multiple USB4 ports.
Though the USB4 specification is complete, it will still be some time before we can expect to see devices that take advantage of USB4. It typically takes at least a year for new products to come out following the finalization of a new specification, so it will be late 2020 or beyond before we begin seeing USB4 devices.
Popular Stories
Apple today introduced the iPhone 17 Pro and iPhone 17 Pro Max.
Both devices feature a new aluminum unibody design, with the Ceramic Shield now protecting both the front and back sides. Apple says the front side is now Ceramic Shield 2, which offers 3x better scratch resistance, while the rear Ceramic Shield is advertised as 4x more resistant to cracks compared to the back glass on previous...
Apple continues to phase out the physical SIM card tray on iPhones, with the latest models relying solely on eSIM technology in more countries.
The new iPhone 17, iPhone 17 Pro, and iPhone 17 Pro Max support eSIMs only in these countries and regions, according to Apple:
Bahrain
Canada
Guam
Japan
Kuwait
Mexico
Oman
Qatar
Saudi Arabia
United Arab Emirates
Un...
Apple's new Live Translation feature for AirPods will be off-limits to millions of European users when it arrives next week, with strict EU regulations likely holding back its rollout.
Apple says on its feature availability webpage that "Apple Intelligence: Live Translation with AirPods" won't be available if both the user is physically in the EU and their Apple Account region is in the EU....
Apple held its annual iPhone event on Tuesday, September 9, to unveil the iPhone 17, ultra-thin iPhone Air, iPhone 17 Pro, and iPhone 17 Pro Max.
All of the new iPhone models will be available to pre-order starting Friday, September 12 at 5 a.m. Pacific Time / 8 a.m. Eastern Time in the U.S. and dozens of other countries, according to Apple. The release date for the devices is one week...
While the iPhone 18 Pro and iPhone 18 Pro Max are still a year away, there are already a few rumors about the devices that offer an early look ahead.
If you are skipping the iPhone 17 Pro and want to know about what to expect from the iPhone 18 Pro models, we have recapped a few of the key rumors below.
Under-Screen Face ID
In April 2023, display industry analyst Ross Young shared a...
Apple has confirmed the battery capacities for the iPhone 17, iPhone Air, iPhone 17 Pro, and iPhone 17 Pro Max models that were announced earlier today.
Apple is required to publish energy labels on its iPhone product pages in the EU, and they reveal the official mAh battery capacities for the devices.
Here are the battery capacities for each model, according to Apple:
iPhone 17:...
The first benchmark results for the A19 Pro chip in the iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air surfaced in the Geekbench 6 database today.
Based on these early results — which are unconfirmed — the A19 Pro chip across the Pro models and the iPhone Air appears to deliver up to 13% to 15% faster multi-core CPU performance compared to the A18 Pro chip in the iPhone 16 Pro...
