prEN IEC 62680-1-3:2025

SLOVENSKI STANDARD
01-julij-2025
Vmesniki univerzalnega serijskega vodila za prenos podatkov in napajanje - 1-3.
del: Skupne komponente - Specifikacija za kable in priključke univerzalnega
serijskega vodila tipa c®
Universal serial bus interfaces for data and power - Part 1-3: Common components -
USB type-c® cable and connector specification
Interfaces de bus universel en série pour les données et l'alimentation électrique - Partie
1-3: Composants communs - Spécification des câbles et des connecteurs USB type-c®
Ta slovenski standard je istoveten z: prEN IEC 62680-1-3:2025
ICS:
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

100/4332/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62680-1-3 ED7
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-06 2025-08-29
SUPERSEDES DOCUMENTS:
100/4320/RR
IEC TA 18 : MULTIMEDIA HOME SYSTEMS AND APPLICATIONS FOR END-USER NETWORKS
SECRETARIAT: SECRETARY:
Japan Mr Keisuke Koide
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Universal serial bus interfaces for data and power - Part 1-3: Common components - USB Type-C®
cable and connector specification

PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
®
Release 2.4 - 2 - USB Type-C Cable and
October 2024 Connector Speci�ication
3 Universal Serial Bus
4 Type-C Cable and Connector
5 Specification
10 Release 2.4
11 October 2024 ®
Release 2.4 - 3 - USB Type-C Cable and
October 2024 Connector Speci�ication
13 Copyright © 2014-2024, USB 3.0 Promoter Group:
14 Apple Inc., HP Inc., Intel Corporation, Microsoft Corporation,
15 Renesas, STMicroelectronics, and Texas Instruments
16 All rights reserved. ®
18 NOTE: Adopters may only use the USB Type-C cable and connector to implement USB or third-party
19 functionality as expressly described in this Speci�ication; all other uses are prohibited.
20 LIMITED COPYRIGHT LICENSE: The USB 3.0 Promoters grant a conditional copyright license under the
21 copyrights embodied in the USB Type-C Cable and Connector Speci�ication to use and reproduce the
22 Speci�ication for the sole purpose of, and solely to the extent necessary for, evaluating whether to implement
23 the Speci�ication in products that would comply with the speci�ication. Without limiting the foregoing, use of
24 the Speci�ication for the purpose of �iling or modifying any patent application to target the Speci�ication or
25 USB compliant products is not authorized. Except for this express copyright license, no other rights or
26 licenses are granted, including without limitation any patent licenses. In order to obtain any additional
27 intellectual property licenses or licensing commitments associated with the Speci�ication a party must
28 execute the USB 3.0 Adopters Agreement. NOTE: By using the Speci�ication, you accept these license terms on
29 your own behalf and, in the case where you are doing this as an employee, on behalf of your employer.
32 INTELLECTUAL PROPERTY DISCLAIMER
33 THIS SPECIFICATION IS PROVIDED TO YOU “AS IS” WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY
34 WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE.
35 THE AUTHORS OF THIS SPECIFICATION DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR
36 INFRINGEMENT OF ANY PROPRIETARY RIGHTS, RELATING TO USE OR IMPLEMENTATION OF
37 INFORMATION IN THIS SPECIFICATION. THE PROVISION OF THIS SPECIFICATION TO YOU DOES NOT
38 PROVIDE YOU WITH ANY LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY
39 INTELLECTUAL PROPERTY RIGHTS.
40 All implementation examples and reference designs contained within this Speci�ication are included as part of
41 the limited patent license for those companies that execute the USB 3.0 Adopters Agreement.
® ® ®
44 USB Type-C , USB-C and USB4 are trademarks of the Universal Serial Bus Implementers Forum (USB-IF).
45 DisplayPort™ is a trademark of VESA. All product names are trademarks, registered trademarks, or service
46 marks of their respective owners.
47 Thunderbolt™ is a trademark of Intel Corporation. You may only use the Thunderbolt™ trademark or logo in
48 conjunction with products designed to this speci�ication that complete proper certi�ication and executing a
49 Thunderbolt™ trademark license – see https://www.usb.org/compliance for further information. ®
Release 2.4 - 4 - USB Type-C Cable and
October 2024 Connector Speci�ication
51 Contents
52 Speci�ication Editor .1 9
53 Speci�ication Work Group Contributors .1 9
54 Pre-Release Draft Industry Reviewing Companies That Provided Feedback . 27
55 Revision History .2 8
56 1 Introduction .2 9
57 1.1 Purpose .2 9
58 1.2 Scope .2 9
59 1.3 Related Documents .2 9
60 1.4 Conventions .3 0
61 1.4.1 Precedence .3 0
62 1.4.2 Keywords .3 0
63 1.4.3 Numbering.3 1
64 1.5 Terms and Abbreviations .3 1
65 2 Overview .3 7
66 2.1 Introduction .3 7
67 2.2 USB Type-C Receptacles, Plugs and Cables .3 8
68 2.3 Con�iguration Process .3 9
69 2.3.1 Source-to-Sink Attach/Detach Detection .4 0
70 2.3.2 Plug Orientation/Cable Twist Detection .4 0
71 2.3.3 Initial Power (Source-to-Sink) Detection and Establishing the Data (Host-to-Device) Relationship
72 40
73 2.3.4 USB Type-C VBUS Current Detection and Usage .4 1
74 2.3.5 USB PD Communications.4 1
75 2.3.6 Functional Extensions .4 2
76 2.4 VBUS .4 2
77 2.5 VCONN .4 2
78 2.6 Hubs .4 3
79 3 Mechanical .4 4
80 3.1 Overview .4 4
81 3.1.1 Compliant Connectors .4 4
82 3.1.2 Compliant Cable Assemblies .4 4
83 3.1.3 Compliant USB Type-C to Legacy Cable Assemblies .4 5
84 3.1.4 Compliant USB Type-C to Legacy Adapter Assemblies .4 6
85 3.2 USB Type-C Connector Mating Interfaces .4 6
86 3.2.1 Interface De�inition.4 6
87 3.2.2 Reference Designs .7 0 ®
Release 2.4 - 5 - USB Type-C Cable and
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88 3.2.3 Pin Assignments and Descriptions .7 7
89 3.3 Cable Construction and Wire Assignments .7 8
90 3.3.1 Cable Construction (Informative) .7 8
91 3.3.2 Wire Assignments .8 0
92 3.3.3 Wire Gauges and Cable Diameters (Informative) .8 1
93 3.4 Standard USB Type-C Cable Assemblies .8 3
94 3.4.1 USB Full-Featured Type-C Cable Assembly .8 3
95 3.4.2 USB 2.0 Type-C Cable Assembly .8 5
96 3.4.3 USB Type-C Captive Cable Assembly .8 5
97 3.4.4 USB Type-C Thumb Drive Assembly .8 6
98 3.5 Legacy Cable Assemblies .8 6
99 3.5.1 USB Type-C to USB 3.1 Standard-A Cable Assembly .8 7
100 3.5.2 USB Type-C to USB 2.0 Standard-A Cable Assembly .8 8
101 3.5.3 USB Type-C to USB 3.1 Standard-B Cable Assembly .8 9
102 3.5.4 USB Type-C to USB 2.0 Standard-B Cable Assembly .9 0
103 3.5.5 USB Type-C to USB 2.0 Mini-B Cable Assembly .9 1
104 3.5.6 USB Type-C to USB 3.1 Micro-B Cable Assembly .9 2
105 3.5.7 USB Type-C to USB 2.0 Micro-B Cable Assembly .9 3
106 3.6 Legacy Adapter Assemblies.9 3
107 3.6.1 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly . 93
108 3.6.2 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly . 95
109 3.7 Electrical Characteristics .9 5
110 3.7.1 Raw Cable (Informative) .9 6
111 3.7.2 USB Type-C to USB Type-C Passive Cable Assemblies .9 7
112 3.7.3 Mated Connector (Informative – USB 3.2 Gen2 and USB4 Gen2). 119
113 3.7.4 Receptacle Connector SI Requirements and Testing (Normative – USB4 Gen3/Gen4) . 123
114 3.7.5 USB Type-C to USB Legacy Cable Assemblies (Normative) . 125
115 3.7.6 USB Type-C to USB Legacy Adapter Assemblies (Normative) . 129
116 3.7.7 Shielding Effectiveness Requirements (Normative) . 132
117 3.7.8 DC Electrical Requirements (Normative). 134
118 3.8 Mechanical and Environmental Requirements (Normative) . 137
119 3.8.1 Mechanical Requirements . 137
120 3.8.2 Environmental Requirements . 142
121 3.9 Docking Applications (Informative) . 143
122 3.10 Implementation Notes and Design Guides . 144
123 3.10.1 EMC Management (Informative) . 144
124 3.10.2 Stacked and Side-by-Side Connector Physical Spacing (Informative) . 147 ®
Release 2.4 - 6 - USB Type-C Cable and
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125 3.10.3 Cable Mating Considerations (Informative) . 147
126 3.11 Extended Power Range (EPR) Cables . 149
127 3.11.1 Electrical Requirements . 149
128 3.11.2 EPR Cable Identi�ication Requirements . 149
129 4 Functional . 150
130 4.1 Signal Summary . 150
131 4.2 Signal Pin Descriptions . 150
132 4.2.1 USB 3.2/USB4 Pins . 150
133 4.2.2 USB 2.0 Pins . 151
134 4.2.3 Auxiliary Signal Pins . 151
135 4.2.4 Power and Ground Pins . 151
136 4.2.5 Con�iguration Pins . 151
137 4.3 Sideband Use (SBU) . 151
138 4.4 Power and Ground. 152
139 4.4.1 IR Drop . 152
140 4.4.2 VBUS . 153
141 4.4.3 VCONN . 154
142 4.5 Con�iguration Channel (CC) . 159
143 4.5.1 Architectural Overview . 159
144 4.5.2 CC Functional and Behavioral Requirements . 171
145 4.5.3 USB Port Interoperability Behavior . 207
146 4.6 Power . 225
147 4.6.1 Power Requirements during USB Suspend . 226
148 4.6.2 VBUS Power Provided Over a USB Type-C Cable . 227
149 4.7 USB Hubs . 232
150 4.8 Power Sourcing and Charging . 233
151 4.8.1 DFP as a Power Source . 233
152 4.8.2 Non-USB Charging Methods . 235
153 4.8.3 Sinking Host . 236
154 4.8.4 Sourcing Device . 236
155 4.8.5 Charging a System with a Dead Battery . 236
156 4.8.6 USB Type-C Multi-Port Chargers . 236
157 4.9 Electronically Marked Cables . 240
158 4.9.1 Parameter Values . 241
159 4.9.2 Active Cables . 241
160 4.10 VCONN-Powered Accessories (VPAs) and VCONN-Powered USB Devices (VPDs) . 242
161 4.10.1 VCONN-Powered Accessories (VPAs) . 242 ®
Release 2.4 - 7 - USB Type-C Cable and
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162 4.10.2 VCONN-Powered Devices (VPDs) . 242
163 4.11 Parameter Values . 244
164 4.11.1 Termination Parameters . 244
165 4.11.2 Timing Parameters . 246
166 4.11.3 Voltage Parameters . 250
167 5 USB4 Discovery and Entry . 257
168 5.1 Overview of the Discovery and Entry Process . 257
169 5.2 USB4 Functional Requirements . 258
170 5.2.1 USB4 Host Functional Requirements . 258
171 5.2.2 USB Device Functional Requirements . 258
172 5.2.3 USB4 Alternate Mode Support . 258
173 5.3 USB4 Power Requirements . 259
174 5.3.1 Source Power Requirements . 259
175 5.3.2 Sink Power Requirements . 259
176 5.3.3 Device Power Management Requirements . 259
177 5.4 USB4 Discovery and Entry Flow Requirements . 260
178 5.4.1 USB Type-C Initial Connection . 260
179 5.4.2 USB Power Delivery Contract . 260
180 5.4.3 USB4 Discovery and Entry Flow . 260
181 5.4.4 USB4 Post-Entry Operation . 266
182 5.5 USB4 Hub Connection Requirements. 266
183 5.5.1 USB4 Hub Port Initial Connection Requirements . 266
184 5.5.2 USB4 Hub UFP and Host Capabilities Discovery . 266
185 5.5.3 Hub DFP Connection Requirements . 267
186 5.5.4 Hub Ports Connection Behavior Flow Examples . 268
187 5.5.5 Connecting to Downstream USB4 Hubs . 274
188 5.5.6 Fallback Functional Requirements for USB4 Hubs . 274
189 5.6 USB4 Device Connection Requirements . 275
190 5.6.1 Fallback Mapping of USB4 Peripheral Functions of USB Device Class Types . 275
191 5.7 Parameter Values . 276
192 5.7.1 Timing Parameters . 276
193 6 Active Cables . 277
194 6.1 General Speci�ications for All Active Cables . 277
195 6.1.1 Discovering Active Cable Characteristics . 277
196 6.1.2 Electrical Requirements . 279
197 6.1.3 Mechanical Requirements . 311
198 6.2 Additional Speci�ications for Copper and Hybrid-Optical Active Cables . 312 ®
Release 2.4 - 8 - USB Type-C Cable and
October 2024 Connector Speci�ication
199 6.2.1 Active Cable Block Diagram . 313
200 6.2.2 USB4 Asymmetric Mode Support . 313
201 6.2.3 Active Cable USB PD Requirements . 313
202 6.2.4 Active Cable Behaviors in Response to USB PD Events . 313
203 6.2.5 Active Cable Power Requirements . 314
204 6.3 Additional Speci�ications for Optically Isolated Active Cables . 314
205 6.3.1 OIAC Block Diagrams . 315
206 6.3.2 OIAC Limitations and General Requirements . 317
207 6.3.3 OIAC Cable Power Requirements . 318
208 6.3.4 OIAC USB PD Requirements . 318
209 6.3.5 OIAC Connection Flow and State Diagrams . 328
210 6.3.6 Additional Electrical Requirements for OIAC . 346
211 6.3.7 Additional Mechanical Requirements for OIAC . 349
212 A Liquid Corrosion Mitigation Mode . 350
213 A.1 Overview . 350
214 A.2 Detail . 350
215 A.3 Liquid Detection Methods . 352
216 A.3.1 Liquid Measurement Method . 352
217 A.3.2 Pulsed Measurement Method . 352
218 A.3.3 Impedance Measurement Method . 353
219 A.4 Liquid Detection Pins in the Connector . 356
220 B Debug Accessory Mode . 359
221 B.1 Overview . 359
222 B.2 Functional . 359
223 B.2.1 Signal Summary . 359
224 B.2.2 Port Interoperability . 360
225 B.2.3 Debug Accessory Mode Entry . 360
226 B.2.4 Connection State Diagrams. 360
227 B.2.5 DTS Port Interoperability Behaviors . 369
228 B.2.6 Orientation Detection. 378
229 B.3 Security/Privacy Requirements . 378
230 C USB Type-C Digital Audio . 379
231 C.1 Overview . 379
232 C.2 USB Type-C Digital Audio Speci�ications . 379
233 D Thermal Design Considerations for Active Cables . 380
234 D.1 Introduction . 380
235 D.2 Model . 380 ®
Release 2.4 - 9 - USB Type-C Cable and
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236 D.2.1 Assumptions . 380
237 D.2.2 Model Architecture . 381
238 D.2.3 Heat Sources . 381
239 D.2.4 Heat Flow . 382
240 D.3 USB 3.2 Single-Lane Active Cable . 383
241 D.3.1 USB 3.2 Single-Lane Active Cable Design Considerations . 383
242 D.4 Dual-Lane Active Cables. 386
243 D.4.1 USB 3.2 Dual-Lane Active Cable Design Considerations . 386
244 D.4.2 USB 3.2 Dual-Lane Active Cable in a Multiple Port Con�iguration . 388
245 D.5 USB 3.2 Host and Device Design Considerations . 389
246 D.5.1 Heat Spreading or Heat Sinking from Host or Device . 389
247 D.5.2 Motherboard Temperature Control . 390
248 D.5.3 Wider Port Spacing for Multi-Port Applications . 390
249 D.5.4 Power Policies . 390
250 E Alternate Modes . 391
251 E.1 Alternate Mode Architecture . 391
252 E.2 Alternate Mode Requirements . 391
253 E.2.1 Alternate Mode Pin Reassignment. 392
254 E.2.2 Alternate Mode Electrical Requirements . 392
255 E.3 Parameter Values . 395
256 E.4 Example Alternate Mode – USB DisplayPort™ Dock . 396
257 E.4.1 USB DisplayPort™ Dock Example . 396
258 E.4.2 Functional Overview . 396
259 E.4.3 Operational Summary . 397
260 E.5 Example Alternate Mode Entry Flow with Cable Warnings. 398
261 E.5.1 Operational Summary . 399
262 F Thunderbolt™ 3 Compatibility Discovery and Entry . 400
263 F.1 TBT3 Compatibility Mode Functional Requirements . 400
264 F.1.1 TBT3-Compatible Power Requirements . 400
265 F.1.2 TBT3-Compatible Host Requirements . 400
266 F.1.3 TBT3-Compatible Device Upstream Requirements. 400
267 F.1.
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