DEVELOPER UPDATE 

CONTACTS: 

Brad Saunders Joe Balich 

USB Promoter Group USB-IF PR 

+1 503-264-0817 +1 503-619-4113

brad.saunders@intel.com press@usb.org 

USB Promoter Group Announces USB4 Specification 

Specification defines next generation USB protocol architecture and doubling bandwidth 

 to extend USB Type-C™ performance

Beaverton, OR, USA – March 4, 2019 – The USB Promoter Group today announced the pending release 

of the USB4 specification, a major update to deliver the next generation USB architecture that 

compliments and builds on the existing USB 3.2 and USB 2.0 architectures. The USB4 architecture is 

based on the Thunderbolt™ protocol specification recently contributed by Intel Corporation. It doubles 

the bandwidth of USB and enables multiple simultaneous data and display protocols. 

The new USB4 architecture defines a method to share a single high-speed link with multiple end device 

types dynamically that best serves the transfer of data by type and application. As the USB Type-C™

connector has evolved into the role as the external display port of many host products, the USB4 

specification provides the host the ability to optimally scale allocations for display data flow. Even as 

the USB4 specification introduces a new underlying protocol, compatibility with existing USB 3.2, USB 

2.0 and Thunderbolt 3 hosts and devices is supported; the resulting connection scales to the best mutual 

capability of the devices being connected. 

“The primary goal of USB is to deliver the best user experience combining data, display and power 

delivery over a user-friendly and robust cable and connector solution,” said Brad Saunders, USB 

Promoter Group Chairman. “The USB4 solution specifically tailors bus operation to further enhance this 

experience by optimizing the blend of data and display over a single connection and enabling the further 

doubling of performance.”

Key characteristics of the USB4 solution include: 

 Two-lane operation using existing USB Type-C cables and up to 40 Gbps operation over 40 Gbps-

certified cables

 Multiple data and display protocols to efficiently share the total available bandwidth over the

bus

 Backward compatibility with USB 3.2, USB 2.0 and Thunderbolt 3

With over 50 companies actively participating in the final stages of review of the draft specification, the 

USB4 specification is on track to be published around the middle of 2019. Coincident with the release of 

the USB4 specification, the release of an updated USB Type-C Specification will be made to comprehend 

USB4 bus discovery, configuration and performance requirements. 

USB Developer Days 2019, in the second half of this year, will include detailed technical training covering 

the USB4 specification and the latest for USB Type-C, USB Power Delivery, and other exciting topics.

This update is part of the USB performance roadmap and is specifically targeted to developers at this 

time. Branding and marketing guidelines will be established after the final specification is published. 

“Releasing the Thunderbolt protocol specification is a significant milestone for making today’s simplest 

and most versatile port available to everyone,” said Jason Ziller, General Manager, Client Connectivity 

Division at Intel. “By collaborating with the USB Promoter Group, we’re opening the doors for 

innovation across a wide range of devices and increasing compatibility to deliver better experiences to 

consumers.”

“USB4’s high throughput and advanced features enable new scenarios in consumer, enterprise, and 

intelligent edge markets, while maintaining interoperability with existing USB and Thunderbolt 3 

devices,” said Roanne Sones, Corporate Vice President, Microsoft OS Platforms. “We are excited to 

work with our partners in the ecosystem to bring USB4 to market and showcase its benefits.”

About the USB Promoter Group 

The USB Promoter Group, comprised of Apple Inc., Hewlett-Packard Inc., Intel Corporation, Microsoft 

Corporation, Renesas Electronics Corporation, ST Microelectronics, and Texas Instruments, continues to 

develop the USB family of specifications to meet the market needs for increased functionality and 

performance of USB solutions. Additionally, the USB Promoter Group develops specification addendums 

(USB Power Delivery, USB Type-C™, and others) to extend or adapt its specifications to support more 

platform types or use cases where adopting USB technology will be beneficial in delivering a more 

ubiquitous, richer user experience. 

About the USB-IF

The non-profit USB Implementers Forum, Inc. was formed to provide a support organization and forum 

for the advancement and adoption of USB technology as defined in the USB specifications. The USB-IF 

facilitates the development of high-quality compatible USB devices through its logo and compliance 

program, and promotes the benefits of USB and the quality of products that have passed compliance 

testing. Further information, including postings of the most recent product and technology 

announcements, is available by visiting the USB-IF website at www.usb.org. 

USB Type-C™ and USB-C™ are trademarks of USB Implementers Forum. Thunderbolt™ is a trademark 

of Intel Corporation.

开发者更新

联系方式：

Brad Saunders Joe Balich

USB Promoter Group USB-IF PR

+1 503-264-0817 +1 503-619-4113

brad.saunders@intel.com press@usb.org

USB Promoter Group Announc

USB Promoter Group宣布推出USB4规范

规范定义了下一代USB协议架构和双倍带宽

 扩展USB Type-C™性能

美国俄勒冈州比弗顿 -  2019年3月4日 -  USB Promoter Group今天宣布即将发布

USB4规范，是提供下一代USB架构的重大更新

赞美并以现有的USB 3.2和USB 2.0架构为基础。 USB4架构是

基于最近由英特尔公司提供的Thunderbolt™协议规范。它加倍

USB的带宽，支持多个同步数据和显示协议。

新的USB4架构定义了一种与多个终端设备共享单个高速链路的方法

动态类型，最适合按类型和应用程序传输数据。作为USB Type-C™

连接器已经发展成为许多主机产品USB4的外部显示端口

规范为主机提供了最佳地扩展显示数据流分配的能力。即便如此

USB4规范引入了新的底层协议，兼容现有的USB 3.2，USB

支持2.0和Thunderbolt 3主机和设备;由此产生的连接扩展到最好的相互

连接设备的能力。

“USB的主要目标是提供结合数据，显示和功能的最佳用户体验

通过用户友好且强大的电缆和连接器解决方案交付，“USB的Brad Saunders说道

发起人集团主席。 “USB4解决方案专门定制总线操作以进一步增强此功能

通过优化数据混合和在单个连接上显示并进一步实现的经验

表现翻倍。“

USB4解决方案的主要特点包括：

使用现有USB Type-C电缆进行双通道操作，以及40 Gbps以上高达40 Gbps的运行 - 

认证电缆

多种数据和显示协议，可有效地共享总可用带宽

总线

向后兼容USB 3.2，USB 2.0和Thunderbolt 3

有超过50家公司积极参与规范草案审查的最后阶段，

USB4规范有望在2019年中期左右发布。与发布时一致

在USB4规范中，将更新USB Type-C规范的发布

USB4总线发现，配置和性能要求。

USB开发者日2019年，今年下半年，将包括详细的技术培训

USB4规范和最新的USB Type-C，USB供电和其他令人兴奋的主题。

此更新是USB性能路线图的一部分，专门针对开发人员

时间。最终规范发布后，将制定品牌和营销指南。

“发布Thunderbolt协议规范是实现当今最简单的重要里程碑

客户端连接总经理Jason Ziller表示，每个人都可以使用最通用的端口

英特尔分部。 “通过与USB Promoter Group合作，我们正在打开大门

在各种设备上进行创新，并提高兼容性，以提供更好的体验

消费者“。

“USB4的高吞吐量和高级功能支持消费者，企业和企业的新方案

智能边缘市场，同时保持与现有USB和Thunderbolt 3的互操作性

设备，“微软操作系统平台公司副总裁Roanne Sones说。 “我们很高兴

与我们在生态系统中的合作伙伴合作，将USB4推向市场并展示其优势。“

关于USB Promoter Group

USB Promoter Group，由Apple Inc.，Hewlett-Packard Inc.，Intel Corporation，Microsoft组成

公司，瑞萨电子公司，意法半导体和德州仪器继续发展

开发USB系列规格，以满足市场对增加功能的需求

USB解决方案的性能。此外，USB Promoter Group还开发了规范附录

（USB Power Delivery，USB Type-C™等）可扩展或调整其规格以支持更多功能

采用USB技术的平台类型或用例将有助于提供更多

无处不在，更丰富的用户体验。

关于USB-IF

非营利性USB Implementers Forum，Inc。的成立是为了提供支持组织和论坛

用于推进和采用USB规范中定义的USB技术。 USB-IF

通过其徽标和合规性促进高品质兼容USB设备的开发

计划，并促进USB的好处和已通过合规的产品的质量

测试。更多信息，包括最新产品和技术的发布

有关公告，请访问USB-IF网站www.usb.org。

USB Type-C™和USB-C™是USB Implementers Forum的商标。 Thunderbolt™是商标

英特尔公司。

USB2.0设备在全球依然是大有人在(手动滑稽)