Universal Serial Bus Type-C Cable and Connector Specification

1 Release - 1 - USB Type-C Cable and August 2019 Connector Specification Copyright 2019 USB Promoter Group. All rights reserved. Universal Serial Bus Type-C Cable and Connector Specification Release August 2019 Release - 2 - USB Type-C Cable and August 2019 Connector Specification Copyright 2019 USB Promoter Group. All rights reserved. Copyright 2014-2019, USB Promoter Group: Apple Inc., HP Inc., Intel Corporation, Microsoft Corporation, Renesas, STMicroelectronics, and Texas Instruments All rights reserved. NOTE: Adopters may only use the USB Type-C Cable and Connector to implement USB or third party functionality as expressly described in this Specification ; all other uses are prohibited. LIMITED COPYRIGHT LICENSE: The USB Promoters grant a conditional copyright license under the copyrights embodied in the USB Type-C Cable and Connector Specification to use and reproduce the Specification for the sole purpose of, and solely to the extent necessary for, evaluating whether to implement the Specification in products that would comply with the Specification .

2 Without limiting the foregoing, use of the Specification for the purpose of filing or modifying any patent application to target the Specification or USB compliant products is not authorized. Except for this express copyright license, no other rights or licenses are granted, including without limitation any patent licenses. In order to obtain any additional intellectual property licenses or licensing commitments associated with the Specification a party must execute the USB Adopters Agreement. NOTE: By using the Specification , you accept these license terms on your own behalf and, in the case where you are doing this as an employee, on behalf of your employer. INTELLECTUAL PROPERTY DISCLAIMER THIS Specification IS PROVIDED TO YOU AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE.

3 THE AUTHORS OF THIS Specification DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY RIGHTS, RELATING TO USE OR IMPLEMENTATION OF INFORMATION IN THIS Specification . THE PROVISION OF THIS Specification TO YOU DOES NOT PROVIDE YOU WITH ANY LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS. All implementation examples and reference designs contained within this Specification are included as part of the limited patent license for those companies that execute the USB Adopters Agreement. USB Type-C , USB-C and USB4 are trademarks of the Universal Serial Bus Implementers Forum (USB-IF). DisplayPort is a trademark of VESA. All product names are trademarks, registered trademarks, or service marks of their respective owners. Thunderbolt is a trademark of Intel Corporation.

4 You may only use the Thunderbolt trademark or logo in conjunction with products designed to this Specification that complete proper certification and executing a Thunderbolt trademark license see for further information. Release - 3 - USB Type-C Cable and August 2019 Connector Specification Copyright 2019 USB Promoter Group. All rights reserved. CONTENTS Specification Work Group Chairs / Specification Editors .. 16 Specification Work Group Contributors .. 16 Pre-Release Draft Industry Reviewing Companies That Provided Feedback .. 22 Revision History .. 22 1 Introduction .. 23 Purpose .. 23 Scope .. 23 Related 24 Conventions .. 24 Precedence .. 24 Keywords .. 24 Numbering .. 25 Terms and Abbreviations .. 25 2 Overview .. 30 Introduction .. 30 USB Type-C Receptacles, Plugs and Cables .. 31 Configuration Process.

5 32 Source-to-Sink Attach/Detach Detection .. 33 Plug Orientation/ Cable Twist Detection .. 33 Initial Power (Source-to-Sink) Detection and Establishing the Data (Host-to-Device) Relationship .. 33 USB Type-C VBUS Current Detection and Usage .. 34 USB PD Communication .. 35 Functional Extensions .. 35 VBUS .. 35 VCONN .. 36 Hubs .. 36 3 Mechanical .. 37 Overview .. 37 Compliant Connectors .. 37 Compliant Cable Assemblies .. 37 Compliant USB Type-C to Legacy Cable Assemblies .. 37 Compliant USB Type-C to Legacy Adapter Assemblies .. 38 USB Type-C Connector Mating Interfaces .. 39 Interface 39 Reference Designs .. 61 Pin Assignments and Descriptions .. 68 Cable Construction and Wire Assignments .. 69 Cable Construction (Informative) .. 69 Wire Assignments .. 71 Wire Gauges and Cable Diameters (Informative).

6 72 Release - 4 - USB Type-C Cable and August 2019 Connector Specification Copyright 2019 USB Promoter Group. All rights reserved. Standard USB Type-C Cable Assemblies .. 74 USB Full-Featured Type-C Cable Assembly .. 74 USB Type-C Cable Assembly .. 75 USB Type-C Captive Cable Assemblies .. 76 Legacy Cable Assemblies .. 76 USB Type-C to USB Standard-A Cable Assembly .. 77 USB Type-C to USB Standard-A Cable Assembly .. 78 USB Type-C to USB Standard-B Cable Assembly .. 79 USB Type-C to USB Standard-B Cable Assembly .. 80 USB Type-C to USB Mini-B Cable Assembly .. 81 USB Type-C to USB Micro-B Cable Assembly .. 82 USB Type-C to USB Micro-B Cable Assembly .. 84 Legacy Adapter Assemblies .. 85 USB Type-C to USB Standard-A Receptacle Adapter Assembly 85 USB Type-C to USB Micro-B Receptacle Adapter Assembly.

7 87 Electrical Characteristics .. 88 Raw Cable (Informative) .. 88 USB Type-C to Type-C Passive Cable Assemblies (Normative) .. 89 Mated Connector (Informative USB Gen2 and USB4 Gen2) 108 Mated Connector (Normative USB4 Gen3) .. 112 USB Type-C to Legacy Cable Assemblies (Normative) .. 113 USB Type-C to USB Legacy Adapter Assemblies (Normative) .. 117 Shielding Effectiveness Requirements (Normative) .. 119 DC Electrical Requirements (Normative) .. 122 Mechanical and Environmental Requirements (Normative) .. 125 Mechanical Requirements .. 126 Environmental 131 Docking Applications (Informative) .. 132 Implementation Notes and Design Guides .. 133 EMC Management (Informative).. 133 Stacked and Side-by-Side Connector Physical Spacing (Informative) .. 136 Cable Mating Considerations (Informative).

8 136 4 Functional .. 138 Signal Summary .. 138 Signal Pin Descriptions .. 138 SuperSpeed USB Pins .. 138 USB Pins .. 139 Auxiliary Signal Pins .. 139 Power and Ground Pins .. 139 Configuration Pins .. 139 Sideband Use (SBU).. 139 Power and Ground .. 140 IR 140 Release - 5 - USB Type-C Cable and August 2019 Connector Specification Copyright 2019 USB Promoter Group. All rights reserved. 141 VCONN .. 143 Configuration Channel (CC) .. 147 Architectural Overview .. 147 CC Functional and Behavioral Requirements .. 161 USB Port Interoperability Behavior .. 197 216 Power Requirements during USB Suspend .. 217 VBUS Power Provided Over a USB Type-C Cable .. 218 USB Hubs .. 224 Power Sourcing and Charging .. 224 DFP as a Power Source .. 224 Non-USB Charging Methods .. 227 Sinking Host.

9 227 Sourcing Device .. 227 Charging a System with a Dead Battery .. 227 USB Type-C Multi-Port Chargers .. 228 Electronically Marked Cables .. 231 Parameter Values .. 232 Active Cables .. 232 VCONN-Powered Accessories (VPAs) and VCONN-Powered USB Devices (VPDs) .. 232 VCONN-Powered Accessories (VPAs) .. 233 VCONN-Powered USB Devices (VPDs) .. 233 Parameter Values .. 235 Termination Parameters .. 235 Timing Parameters .. 237 Voltage Parameters .. 240 5 USB4 Discovery and Entry .. 242 Overview of the Discovery and Entry Process .. 242 USB4 Functional Requirements .. 243 USB4 Host Functional Requirements .. 243 USB4 Device Functional Requirements .. 243 USB4 Alternate Mode Support .. 243 USB4 Alternate Mode Support on Hosts .. 243 USB4 Alternate Mode Support on Hubs and USB4-based Docks .. 243 USB4 Power Requirements.

10 244 Source Power Requirements .. 244 Sink Power Requirements .. 244 Device Power Management Requirements .. 245 USB4 Discovery and Entry Flow Requirements .. 245 USB Type-C Initial Connection .. 245 USB Power Delivery Contract .. 245 USB4 Discovery and Entry Flow .. 246 Release - 6 - USB Type-C Cable and August 2019 Connector Specification Copyright 2019 USB Promoter Group. All rights reserved. USB4 Device Discovery (SOP) .. 246 USB4 Cable Discovery (SOP ) .. 247 USB4 Operational Entry .. 249 USB4 Post-Entry Operation .. 249 During USB4 Operation .. 249 Exiting USB4 Operation .. 250 USB4 Hub Connection Requirements .. 250 USB4 Hub Port Initial Connection Requirements .. 250 USB4 Hub UFP and Host Capabilities Discovery .. 250 Hub DFP Connection Requirements .. 251 Speculative Connections.