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BS EN IEC 62680-1-3:2021

BS EN IEC 62680-1-3:2021

$215.11

Universal serial bus interfaces for data and power – Common components. USB Type-C(r) Cable and Connector Specification

Published By Publication Date Number of Pages
BSI 2021 370
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IEC 62680-1-3:2021 defines the USB Type-C™ receptacles, plug and cables. The USB Type-C Cable and Connector Specification defines a new receptacle, plug, cable and detection mechanisms that are compatible with existing USB interface electrical and functional specifications. This specification covers the following aspects that are needed to produce and use this new USB cable/connector solution in newer platforms and devices, and that interoperate with existing platforms and devices: – USB Type-C receptacles, including electro-mechanical definition and performance requirements – USB Type-C plugs and cable assemblies, including electro-mechanical definition and performance requirements – USB Type-C to legacy cable assemblies and adapters – USB Type-C-based device detection and interface configuration, including support for legacy connections – USB Power Delivery optimized for the USB Type-C connector. This specification is intended as a supplement to the existing USB 2.0, USB 3.1 and USB Power Delivery specifications. It addresses only the elements required to implement and support the USB Type-C receptacles, plugs and cables. Normative information is provided to allow interoperability of components designed to this specification. Informative information, when provided, may illustrate possible design implementations. IEC 62680-1-3:2021 cancels and replaces the third edition published in 2018 and constitutes a technical revision. New release primarily for enabling USB4 over USB Type-C connectors and cables. Also includes incorporation of all approved ECNs as of the revision date plus editorial clean-up.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
6 FOREWORD
11 English
CONTENTS
30 1 Introduction
1.1 Purpose
1.2 Scope
31 1.3 Related Documents
1.4 Conventions
1.4.1 Precedence
1.4.2 Keywords
32 1.4.3 Numbering
1.5 Terms and Abbreviations
37 2 Overview
2.1 Introduction
Figures
Figure 2-1 USB Type-C Receptacle Interface (Front View)
38 2.2 USB Type-C Receptacles, Plugs and Cables
Figure 2-2 USB Full-Featured Type-C Plug Interface (Front View)
39 2.3 Configuration Process
40 2.3.1 Source-to-Sink Attach/Detach Detection
2.3.2 Plug Orientation/Cable Twist Detection
2.3.3 Initial Power (Source-to-Sink) Detection and Establishing the Data (Host-to-Device) Relationship
41 2.3.4 USB Type-C Vbus Current Detection and Usage
2.3.5 USB PD Communication
42 2.3.6 Functional Extensions
2.4 Vbus
Tables
Table 2-1 Summary of power supply options
43 2.5 Vconn
2.6 Hubs
44 3 Mechanical
3.1 Overview
3.1.1 Compliant Connectors
3.1.2 Compliant Cable Assemblies
3.1.3 Compliant USB Type-C to Legacy Cable Assemblies
Table 3-1 USB Type-C Standard Cable Assemblies
45 3.1.4 Compliant USB Type-C to Legacy Adapter Assemblies
3.2 USB Type-C Connector Mating Interfaces
Table 3-2 USB Type-C Legacy Cable Assemblies
Table 3-3 USB Type-C Legacy Adapter Assemblies
46 3.2.1 Interface Definition
48 Figure 3-1 USB Type-C Receptacle Interface Dimensions
51 Figure 3-2 Reference Design USB Type-C Plug External EMC Spring Contact Zones
52 Figure 3-3 USB Full-Featured Type-C Plug Interface Dimensions
55 Figure 3-4 Reference Footprint for a USB Type-C Vertical Mount Receptacle (Informative)
56 Figure 3-5 Reference Footprint for a USB Type-C Dual-Row SMT Right Angle Receptacle (Informative)
57 Figure 3-6 Reference Footprint for a USB Type-C Hybrid Right-Angle Receptacle (Informative)
58 Figure 3-7 Reference Footprint for a USB Type-C Mid-Mount Dual-Row SMT Receptacle (Informative)
59 Figure 3-8 Reference Footprint for a USB Type-C Mid-Mount Hybrid Receptacle (Informative)
60 Figure 3-9 Reference Footprint for a USB 2.0 Type-C Through Hole Right Angle Receptacle (Informative)
61 Figure 3-10 Reference Footprint for a USB 2.0 Type-C Single Row Right Angle Receptacle (Informative)
63 Figure 3-11 USB 2.0 Type-C Plug Interface Dimensions
66 Figure 3-12 USB Type-C Plug EMC Shielding Spring Tip Requirements
67 3.2.2 Reference Designs
Figure 3-13 Reference Design of Receptacle Mid-Plate
68 Figure 3-14 Reference Design of the Retention Latch
Figure 3-15 Illustration of the Latch Soldered to the Paddle Card Ground
69 Figure 3-16 Reference Design of the USB Full-Featured Type-C Plug Internal EMC Spring
70 Figure 3-17 Reference Design of the USB 2.0 Type-C Plug Internal EMC Spring
71 Figure 3-18 Reference Design of Internal EMC Pad
72 Figure 3-19 Reference Design of a USB Type-C Receptacle with External EMC Springs
73 Figure 3-20 Reference Design for a USB Full-Featured Type-C Plug Paddle Card
74 3.2.3 Pin Assignments and Descriptions
Table 3-4 USB Type-C Receptacle Interface Pin Assignments
75 3.3 Cable Construction and Wire Assignments
3.3.1 Cable Construction (Informative)
Table 3-5 USB Type-C Receptacle Interface Pin Assignments for USB 2.0-only Support
76 Figure 3-21 Illustration of a USB Full-Featured Type-C Cable Cross Section, a Coaxial Wire Example with Vconn
Figure 3-22 Illustration of a USB Full-Featured Type-C Cable Cross Section, a Coaxial Wire Example without Vconn
77 3.3.2 Wire Assignments
Table 3-6 USB Type-C Standard Cable Wire Assignments
78 3.3.3 Wire Gauges and Cable Diameters (Informative)
Table 3-7 USB Type-C Cable Wire Assignments for Legacy Cables/Adapters
79 Table 3-8 Reference Wire Gauges for standard USB Type-C Cable Assemblies
Table 3-9 Reference Wire Gauges for USB Type-C to Legacy Cable Assemblies
80 3.4 Standard USB Type-C Cable Assemblies
3.4.1 USB Full-Featured Type-C Cable Assembly
Figure 3-23 USB Full-Featured Type-C Standard Cable Assembly
81 3.4.2 USB 2.0 Type-C Cable Assembly
Table 3-10 USB Full-Featured Type-C Standard Cable Assembly Wiring
82 3.4.3 USB Type-C Captive Cable Assemblies
3.5 Legacy Cable Assemblies
Table 3-11 USB 2.0 Type-C Standard Cable Assembly Wiring
83 3.5.1 USB Type-C to USB 3.1 Standard-A Cable Assembly
Figure 3-24 USB Type-C to USB 3.1 Standard-A Cable Assembly
Table 3-12 USB Type-C to USB 3.1 Standard-A Cable Assembly Wiring
84 3.5.2 USB Type-C to USB 2.0 Standard-A Cable Assembly
Figure 3-25 USB Type-C to USB 2.0 Standard-A Cable Assembly
Table 3-13 USB Type-C to USB 2.0 Standard-A Cable Assembly Wiring
85 3.5.3 USB Type-C to USB 3.1 Standard-B Cable Assembly
Figure 3-26 USB Type-C to USB 3.1 Standard-B Cable Assembly
Table 3-14 USB Type-C to USB 3.1 Standard-B Cable Assembly Wiring
86 3.5.4 USB Type-C to USB 2.0 Standard-B Cable Assembly
Figure 3-27 USB Type-C to USB 2.0 Standard-B Cable Assembly
Table 3-15 USB Type-C to USB 2.0 Standard-B Cable Assembly Wiring
87 3.5.5 USB Type-C to USB 2.0 Mini-B Cable Assembly
Figure 3-28 USB Type-C to USB 2.0 Mini-B Cable Assembly
Table 3-16 USB Type-C to USB 2.0 Mini-B Cable Assembly Wiring
88 3.5.6 USB Type-C to USB 3.1 Micro-B Cable Assembly
Figure 3-29 USB Type-C to USB 3.1 Micro-B Cable Assembly
89 Table 3-17 USB Type-C to USB 3.1 Micro-B Cable Assembly Wiring
90 3.5.7 USB Type-C to USB 2.0 Micro-B Cable Assembly
Figure 3-30 USB Type-C to USB 2.0 Micro-B Cable Assembly
Table 3-18 USB Type-C to USB 2.0 Micro-B Cable Assembly Wiring
91 3.6 Legacy Adapter Assemblies
3.6.1 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly
Figure 3-31 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly
92 Table 3-19 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly Wiring
93 3.6.2 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly
Figure 3-32 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly
Table 3-20 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly Wiring
94 3.7 Electrical Characteristics
3.7.1 Raw Cable (Informative)
Table 3-21 Differential Insertion Loss Examples for TX/RX with Twisted Pair Construction
95 3.7.2 USB Type-C to Type-C Passive Cable Assemblies (Normative)
Figure 3-33 Illustration of Test Points for a Mated Cable Assembly
Table 3-22 Differential Insertion Loss Examples for USB TX/RX with Coaxial Construction
96 Figure 3-34 Recommended Differential Insertion Loss Requirement (USB 3.2 Gen2 and USB4 Gen2)
Figure 3-35 Recommended Differential Return Loss Requirement
97 Figure 3-36 Recommended Differential Crosstalk Requirement
98 Figure 3-37 Recommended Differential Near-End and Far-End Crosstalk Requirement between USB D+/D− Pair and TX/RX Pair
Figure 3-38 Recommended Differential Insertion Loss Requirement (USB4 Gen3)
99 Figure 3-39 Illustration of Insertion Loss Fit at Nyquist Frequency
100 Figure 3-40 Input Pulse Spectrum
101 Figure 3-41 IMR Limit as Function of ILfitatNq
103 Figure 3-42 IRL Limit as Function of ILfitatNq
Figure 3-43 Differential-to-Common-Mode Conversion Requirement
104 Figure 3-44 IMR Limit as Function of ILfit at 10 GHz (USB4 Gen3)
105 Figure 3-45 Definition of Port, Victim, and Aggressor
Figure 3-46 IXT_DP and IXT_USB Limit as Function of ILfit at 10 GHz (USB4 Gen3)
106 Figure 3-47 IRL Limit as Function of ILfitatNq (USB4 Gen3)
Figure 3-48 Differential-to-Commom-Mode Conversion Requirement (USB4 Gen3)
107 Figure 3-49 Cable Assembly in System
Table 3-23 Key Parameters in COM Configuration File
108 Table 3-24 Electrical Requirements for CC and SBU wires
Table 3-25 Coupling Matrix for Low Speed Signals
109 Figure 3-50 Requirement for Differential Coupling between CC and D+/D−
Figure 3-51 Requirement for Single-Ended Coupling between CC and D− in USB 2.0 Type-C Cables
110 Figure 3-52 Requirement for Single-Ended Coupling between CC and D− in USB Full-Featured Type-C Cables
Figure 3-53 Requirement for Differential Coupling between Vbus and D+/D−
111 Figure 3-54 Requirement for Single-Ended Coupling between SBU_A and SBU_B
Table 3-26 Maximum Mutual Inductance (M) between Vbus and Low Speed Signal Lines
112 Figure 3-55 Requirement for Single-Ended Coupling between SBU_A/SBU_B and CC
Figure 3-56 Requirement for Coupling between SBU_A and differential D+/D−, and SBU_B and differential D+/D−
113 3.7.3 Mated Connector (Informative – USB 3.2 Gen2 and USB4 Gen2)
Figure 3-57 Illustration of USB Type-C Mated Connector
Table 3-27 USB D+/D− Signal Integrity Requirements for USB Type-C to USB Type-C Passive Cable Assemblies
114 Figure 3-58 Recommended Impedance Limits of a USB Type-C Mated Connector
115 Figure 3-59 Recommended Ground Void Dimensions for USB Type-C Receptacle
Table 3-28 USB Type-C Mated Connector Recommended Signal Integrity Characteristics (Informative)
116 Figure 3-60 Recommended Differential Near-End and Far-End Crosstalk Limits between D+/D− Pair and TX/RX Pairs
117 3.7.4 Mated Connector (Normative – USB4 Gen3)
Figure 3-61 Recommended Limits for Differential-to-Common-Mode Conversion
Table 3-29 USB Type-C Mated Connector Signal Integrity Characteristics for USB4 Gen3 (Normative)
118 3.7.5 USB Type-C to Legacy Cable Assemblies (Normative)
119 Table 3-30 USB D+/D− Signal Integrity Requirements for USB Type-C to Legacy USB Cable Assemblies
Table 3-31 Design Targets for USB Type-C to USB 3.1 Gen2 Legacy Cable Assemblies (Informative)
120 Table 3-32 USB Type-C to USB 3.1 Gen2 Legacy Cable Assembly Signal Integrity Requirements (Normative)
121 Figure 3-62 IMR Limit as Function of ILfitatNq for USB Type-C to Legacy Cable Assembly
Figure 3-63 IRL Limit as Function of ILfitatNq for USB Type-C to Legacy Cable Assembly
122 3.7.6 USB Type-C to USB Legacy Adapter Assemblies (Normative)
Table 3-33 USB D+/D− Signal Integrity Requirements for USB Type-C to Legacy USB Adapter Assemblies (Normative)
123 Table 3-34 Design Targets for USB Type-C to USB 3.1 Standard-A Adapter Assemblies (Informative)
Table 3-35 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly Signal Integrity Requirements (Normative)
124 3.7.7 Shielding Effectiveness Requirements (Normative)
Figure 3-64 Cable Assembly Shielding Effectiveness Testing
125 Figure 3-65 Shielding Effectiveness Pass/Fail Criteria
126 3.7.8 DC Electrical Requirements (Normative)
Figure 3-66 LLCR Measurement Diagram
127 Figure 3-67 Temperature Measurement Point
128 Figure 3-68 Example Current Rating Test Fixture Trace Configuration
Table 3-36 Current Rating Test PCB
Table 3-37 Maximum DC Resistance Requirement (Normative)
129 3.8 Mechanical and Environmental Requirements (Normative)
3.8.1 Mechanical Requirements
130 Figure 3-69 Example of 4-Axis Continuity Test Fixture
131 Table 3-38 Force and Moment Requirements
132 Figure 3-70 Example Wrenching Strength Test Fixture for Plugs without Overmold
133 Figure 3-71 Reference Wrenching Strength Continuity Test Fixture
Figure 3-72 Example of Wrenching Strength Test Mechanical Failure Point
134 3.8.2 Environmental Requirements
Figure 3-73 Wrenching Strength Test with Cable in Fixture
Table 3-39 Environmental Test Conditions
135 3.9 Docking Applications (Informative)
Table 3-40 Reference Materials
136 3.10 Implementation Notes and Design Guides
3.10.1 EMC Management (Informative)
Figure 3-74 USB Type-C Cable Receptacle Flange Example
137 Figure 3-75 EMC Guidelines for Side Latch and Mid-plate
Figure 3-76 EMC Finger Connections to Plug Shell
138 3.10.2 Stacked and Side-by-Side Connector Physical Spacing (Informative)
Figure 3-77 EMC Pad Connections to Receptacle Shell
Figure 3-78 Examples of Connector Apertures
139 3.10.3 Cable Mating Considerations (Informative)
Figure 3-79 Recommended Minimum Spacing between Connectors
Figure 3-80 Recommended Minimum Plug Overmold Clearance
Figure 3-81 Cable Plug Overmold and an Angled Surface
140 4 Functional
4.1 Signal Summary
4.2 Signal Pin Descriptions
4.2.1 SuperSpeed USB Pins
Table 4-1 USB Type-C List of Signals
141 4.2.2 USB 2.0 Pins
4.2.3 Auxiliary Signal Pins
4.2.4 Power and Ground Pins
4.2.5 Configuration Pins
4.3 Sideband Use (SBU)
4.4 Power and Ground
4.4.1 IR Drop
142 4.4.2 Vbus
Figure 4-1 Cable IR Drop
Figure 4-2 Cable IR Drop for powered cables
143 Table 4-2 Vbus Source Characteristics
144 Table 4-3 Vbus Sink Characteristics
145 4.4.3 Vconn
Table 4-4 USB Type-C Source Port’s Vconn Requirements Summary
146 Table 4-5 Vconn Source Characteristics
147 Table 4-6 Cable Vconn Sink Characteristics
148 Table 4-7 Vconn-Powered Accessory (VPA) Sink Characteristics
149 4.5 Configuration Channel (CC)
4.5.1 Architectural Overview
Table 4-8 Vconn-Powered USB Device (VPD) Sink Characteristics
151 Figure 4-3 Logical Model for Single-Lane Data Bus Routing across USB Type-C-based Ports
Figure 4-4 Logical Model for USB Type-C-based Ports for a Single-Lane Direct Connect Device
152 Table 4-9 USB Type-C-based Port Interoperability
153 Figure 4-5 Pull-Up/Pull-Down CC Model
Figure 4-6 Current Source/Pull-Down CC Model
154 Table 4-10 Source Perspective
155 Table 4-11 Source (Host) and Sink (Device) Behaviors by State
156 Figure 4-7 Source Functional Model for CC1 and CC2
157 Figure 4-8 Source Functional Model Supporting USB PD PR_Swap
Figure 4-9 Sink Functional Model for CC1 and CC2
158 Figure 4-10 Sink Functional Model Supporting USB PD PR_Swap and Vconn_Swap
159 Figure 4-11 DRP Functional Model for CC1 and CC2
161 Table 4-12 USB PD Swapping Port Behavior Summary
162 Table 4-13 Power Role Behavioral Model Summary
163 4.5.2 CC Functional and Behavioral Requirements
164 Figure 4-12 Connection State Diagram: Source
165 Figure 4-13 Connection State Diagram: Sink
166 Figure 4-14 Connection State Diagram: Sink with Accessory Support
167 Figure 4-15 Connection State Diagram: DRP
168 Figure 4-16 Connection State Diagram: DRP with Accessory and Try.SRC Support
169 Figure 4-17 Connection State Diagram: DRP with Accessory and Try.SNK Support
170 Figure 4-18 Connection State Diagram: Charge-Through VPD
171 Table 4-14 Source Port CC Pin State
Table 4-15 Sink Port CC Pin State
193 Figure 4-19 Sink Power Sub-States
194 Figure 4-20 Cable eMarker State Diagram
196 Table 4-16 Mandatory and Optional States
198 4.5.3 USB Port Interoperability Behavior
Figure 4-21 Source to Sink Functional Model
199 Figure 4-22 Source to DRP Functional Model
200 Figure 4-23 DRP to Sink Functional Model
201 Figure 4-24 DRP to DRP Functional Model – CASE 1
202 Figure 4-25 DRP to DRP Functional Model – CASE 2 & 3
204 Figure 4-26 Source to Source Functional Model
205 Figure 4-27 Sink to Sink Functional Model
Figure 4-28 DRP to VPD Model
206 Figure 4-29 Example DRP to Charge-Through Vconn-Powered USB Device Model
214 Figure 4-30 Source to Legacy Device Port Functional Model
215 Figure 4-31 Legacy Host Port to Sink Functional Model
216 Figure 4-32 DRP to Legacy Device Port Functional Model
217 4.6 Power
Figure 4-33 Legacy Host Port to DRP Functional Model
218 4.6.1 Power Requirements during USB Suspend
Table 4-17 Precedence of power source usage
219 4.6.2 Vbus Power Provided Over a USB Type-C Cable
220 Figure 4-34 Sink Monitoring for Current in Pull-Up/Pull-Down CC Model
Table 4-18 USB Type-C Current Advertisement and PDP Equivalent
221 Figure 4-35 Sink Monitoring for Current in Current Source/Pull-Down CC Model
Figure 4-36 USB PD over CC Pins
222 Figure 4-37 USB PD BMC Signaling over CC
223 Table 4-19 Precedence of power source usage
224 4.7 USB Hubs
4.8 Power Sourcing and Charging
Table 4-20 Example Charge-Through VPD Sink Maximum Currents based on Vbus Impedance and GND Impedance
225 4.8.1 DFP as a Power Source
226 Figure 4-38 USB Type-C Cable’s Output as a Function of Load for Non-PD-based USB Type-C Charging
227 4.8.2 Non-USB Charging Methods
Figure 4-39 0 – 3 A USB PD-based Charger USB Type-C Cable’s Output as a Function of Load
Figure 4-40 3 – 5 A USB PD-based Charger USB Type-C Cable’s Output as a Function of Load
228 4.8.3 Sinking Host
4.8.4 Sourcing Device
4.8.5 Charging a System with a Dead Battery
4.8.6 USB Type-C Multi-Port Chargers
231 4.9 Electronically Marked Cables
232 4.9.1 Parameter Values
Figure 4-41 Electronically Marked Cable with Vconn connected through the cable
Figure 4-42 Electronically Marked Cable with SOP’ at both ends
Table 4-21 SOP’ and SOP” Timing
233 4.9.2 Active Cables
4.10 Vconn-Powered Accessories (VPAs) and Vconn-Powered USB Devices (VPDs)
4.10.1 Vconn-Powered Accessories (VPAs)
4.10.2 Vconn-Powered USB Devices (VPDs)
234 Table 4-22 Charge-Through VPD CC Impedance (RccCON) Requirements
Table 4-23 CTVPD Charge-Through Port Vbus Bypass Requirements
235 4.11 Parameter Values
4.11.1 Termination Parameters
Figure 4-43 Example Charge-Through Vconn-Power USB Device Use Case
Table 4-24 Source CC Termination (Rp) Requirements
236 Table 4-25 Sink CC Termination (Rd) Requirements
Table 4-26 Powered Cable Termination Requirements
Table 4-27 CC Termination Requirements for Disabled state, ErrorRecovery state, and Unpowered Source
Table 4-28 SBU Termination Requirements
237 4.11.2 Timing Parameters
Table 4-29 Vbus and Vconn Timing Parameters
238 Figure 4-44 DRP Timing
Table 4-30 DRP Timing Parameters
239 Table 4-31 CC Timing
240 4.11.3 Voltage Parameters
Table 4-32 CC Voltages on Source Side – Default USB
Table 4-33 CC Voltages on Source Side – 1.5 A @ 5 V
241 Table 4-34 CC Voltages on Source Side – 3.0 A @ 5 V
Table 4-35 Voltage on Sink CC Pins (Default USB Type-C Current only)
Table 4-36 Voltage on Sink CC pins (Multiple Source Current Advertisements)
242 5 USB4 Discovery and Entry
5.1 Overview of the Discovery and Entry Process
243 5.2 USB4 Functional Requirements
5.2.1 USB4 Host Functional Requirements
5.2.2 USB4 Device Functional Requirements
5.2.3 USB4 Alternate Mode Support
5.2.3.1 USB4 Alternate Mode Support on Hosts
5.2.3.2 USB4 Alternate Mode Support on Hubs and USB4-based Docks
244 5.3 USB4 Power Requirements
5.3.1 Source Power Requirements
5.3.2 Sink Power Requirements
5.3.3 Device Power Management Requirements
245 5.4 USB4 Discovery and Entry Flow Requirements
5.4.1 USB Type-C Initial Connection
5.4.2 USB Power Delivery Contract
5.4.3 USB4 Discovery and Entry Flow
246 Figure 5-1 USB4 Discovery and Entry Flow Model
247 Table 5-1 Certified Cables Where USB4-compatible Operation is Expected
249 5.4.4 USB4 Post-Entry Operation
250 5.5 USB4 Hub Connection Requirements
5.5.1 USB4 Hub Port Initial Connection Requirements
5.5.2 USB4 Hub UFP and Host Capabilities Discovery
251 5.5.3 Hub DFP Connection Requirements
5.5.4 Hub Ports Connection Behavior Flow Model
252 Figure 5-2 USB4 Hub with USB4 Host and Device Connection Flow Alignment
253 Figure 5-3 USB4 Hub with USB 3.2 Host and USB4 Device Host Connection Flow Model
254 Figure 5-4 USB4 Hub with USB4 Host and USB 3.2 Device Connection Flow Model
255 Figure 5-5 USB4 Hub with USB 3.2 Host and Device Connection Flow Model
256 Figure 5-6 USB4 Hub with USB4 Host and DP Alt Mode Device Connection Flow Model
257 5.5.5 Connecting to Downstream USB4 Hubs
5.5.6 Fallback Functional Requirements for USB4 Hubs
Figure 5-7 USB4 Hub with USB 3.2 Host and DP Alt Mode Device Connection Flow Model
258 5.6 USB4 Device Connection Requirements
5.6.1 Fallback Mapping of USB4 Peripheral Functions to USB Device Class Types
Table 5-2 Fallback Mapping USB4 Peripheral Functions to USB Device Class Types
259 5.7 Parameter Values
5.7.1 Timing Parameters
Table 5-3 USB Billboard Device Class Availability Following USB4 Device Entry Failure
260 6 Active Cables
261 6.1 USB Type-C State Machine
Table 6-1 Comparison of Active Cables
Table 6-2 Summary of Active Cable Features
262 6.2 USB PD Requirements
Figure 6-1 Electronically Marked Short Active Cable with SOP’ Only
263 6.2.1 Active Cable USB PD Requirements
6.2.2 USB PD Messages for OIAC
264 Table 6-3 OIAC USB PD Message Behavior on Initial Connection
266 Table 6-4 OIAC USB PD Messages Which Do Not Traverse in Active State
268 Table 6-5 OIAC USB PD Messages Addressed to SOP Which Traverse the OIAC in the Active State
269 Table 6-6 OIAC USB PD Message Timing
270 Table 6-7 OIAC SOP Messages Which Terminate at the Cable Plug
275 6.2.3 Short Active Cable Behaviors in Response to Power Delivery Events
6.3 OIAC Connection Flow and State Diagrams
276 6.3.1 OIAC Connection Flow – Discovery – Phase 1
Table 6-8 Port and Plug Capabilities
277 6.3.2 OIAC Connection Flow – Reboot – Phase 2
278 6.3.3 OIAC Connection Flow – Configuration – Phase 3
281 6.3.4 OIAC Connection State Diagram Master
289 6.3.5 OIAC Connection State Diagram Slave
294 6.4 Active Cable Power Requirements
6.4.1 Vbus Requirements
6.4.2 OIAC Vbus Requirements
Table 6-9 OIAC Sink_Capabilities PDO (SOP) on Initial Connection
295 6.4.3 USB PD Rules in Active State
Table 6-10 OIAC Sink_Capabilities_Extended PDO (SOP) on Initial Connection
Table 6-11 OIAC Sink RDO (SOP) on Initial Connection
296 6.4.4 Vconn Requirements
Table 6-12 OIAC Active Sink RDO (SOP)
Table 6-13 OIAC Sink_Capabilities PDO (SOP) in Active
297 6.5 Mechanical
6.5.1 Thermal
6.5.2 Plug Spacing
Table 6-14 Cable Temperature Requirements
298 6.6 Electrical Requirements
6.6.1 Shielding Effectiveness Requirement
6.6.2 Low Speed Signal Requirement
6.6.3 USB 2.0
Table 6-15 Summary of Active Cable Features
299 6.6.4 USB 3.2
300 Table 6-16 Active Cable Power-on Requirements
301 Table 6-17 OIAC Maximum USB 3.2 U0 Delay
Table 6-18 Usages for OIAC That Require an Adapter or Hub
302 Table 6-19 USB 3.2 U-State Requirements
304 Table 6-20 Active Cable USB 3.2 Stressed Source Swing, TP1
Table 6-21 Active Cable USB 3.2 Stressed Source Jitter, TP1
305 6.6.5 Return Loss
Table 6-22 Active Cable USB 3.2 Input Swing at TP2 (Informative)
Table 6-23 Active Cable USB 3.2 Output Swing at TP3 (Informative)
306 6.7 Active Cables That Support Alternate Modes
6.7.1 Discover SVIDs
6.7.2 Discover Modes
6.7.3 Enter/Exit Modes
6.7.4 Power in Alternate Modes
307 A Audio Adapter Accessory Mode
A.1 Overview
A.2 Detail
308 A.3 Electrical Requirements
Table A-1 USB Type-C Analog Audio Pin Assignments
309 Table A-2 USB Type-C Analog Audio Pin Electrical Parameter Ratings
310 A.4 Example Implementations
A.4.1 Passive 3.5 mm to USB Type-C Adapter – Single Pole Detection Switch
A.4.2 3.5 mm to USB Type-C Adapter Supporting 500 mA Charge-Through
Figure A-1 Example Passive 3.5 mm to USB Type-C Adapter
311 Figure A-2 Example 3.5 mm to USB Type-C Adapter Supporting 500 mA Charge-Through
312 B Debug Accessory Mode
B.1 Overview
B.2 Functional
Figure B-1 USB Type-C Debug Accessory Layered Behavior
313 B.2.1 Signal Summary
B.2.2 Port Interoperability
B.2.3 Debug Accessory Mode Entry
Figure B-2 DTS Plug Interface
Table B-1 DTS to TS Port Interoperability
314 B.2.4 Connection State Diagrams
Figure B-3 Connection State Diagram: DTS Source
315 Figure B-4 Connection State Diagram: DTS Sink
316 Figure B-5 Connection State Diagram: DTS DRP
320 Figure B-6 TS Sink Power Sub-States
Table B-2 Rp/Rp Charging Current Values for a DTS Source
322 B.2.5 DTS Port Interoperability Behavior
Table B-3 Mandatory and Optional States
331 B.2.6 Orientation Detection
332 B.3 Security/Privacy Requirements:
333 C USB Type-C Digital Audio
C.1 Overview
C.2 USB Type-C Digital Audio Specifications
335 D Thermal Design Considerations for Active Cables
D.1 Introduction
D.2 Model
D.2.1 Assumptions
336 D.2.2 Model Architecture
Figure D-1 Active Cable Model (Single Port, Top Mount Receptacle)
Figure D-2 Model Architecture
337 D.2.3 Heat Sources
D.2.4 Heat Flow
Figure D-3 Heat Sources and Heat Flow Paths
338 D.3 USB 3.2 Single Lane Active Cable
D.3.1 USB 3.2 Single-Lane Active Cable Design Considerations
Table D-1 Heat Sources and Heat Dissipation Example (1.5 W cable and 5 A)
Table D-2 USB 3.2 Active Cable Design Single Port Case Study at 35 °C Ambient and 60 °C Thermal Boundary (Single Lane)
339 Figure D-4 Vertically Stacked Horizontal Connectors 3×1 Configuration (VERT)
Figure D-5 Horizontally Stacked Vertical Connectors 1×3 Configuration (HZ90)
Figure D-6 Horizontally Stacked Horizontal Connector 1×3 Configuration (HORZ)
340 Figure D-7 USB 3.2 Single-Lane 3A Active Cable in a 3-Port Configuration
341 D.4 Dual-Lane Active Cables
D.4.1 USB 3.2 Dual-Lane Active Cable Design Considerations
Figure D-8 USB 3.2 Single-Lane 5A Active Cable in a 3-Port Configuration
342 Figure D-9 Impact of Over-mold Power PO and Thermal Boundary Temperature TMB at 3 A Vbus in a Single Port Configuration
Table D-3 USB 3.2 Active Cable Design Single Port Case Study at 35 °C Ambient and 60 °C Thermal Boundary (Dual Lane)
343 D.4.2 USB 3.2 Dual-Lane Active Cable in a Multi-Port Configuration
Figure D-10 Impact of Over-mold Power PO and Thermal Boundary Temperature TMB at 5 A Vbus in a Single Port Configuration
Figure D-11 USB 3.2 Active Cable Dongle Design (One End Shown)
344 Figure D-12 USB 3.2 Dual-Lane 3A Active Cable in a 3-Port Configuration
345 D.5 USB 3.2 Host and Device Design Considerations
D.5.1 Heat Spreading or Heat Sinking from Host or Device
Figure D-13 USB 3.2 Dual-Lane 5A Active Cable in a 3-Port Configuration
346 D.5.2 Motherboard Temperature Control
D.5.3 Wider Port Spacing for Multi-Port Applications
D.5.4 Power Policies
Figure D-14 Example: Additional Heat Spreader on Receptacle in Host or Device
Figure D-15 Example: Heat Sinking by Chassis of Host or Device
347 E Alternate Modes
E.1 Alternate Mode Architecture
E.2 Alternate Mode Requirements
348 E.2.1 Alternate Mode Pin Reassignment
E.2.2 Alternate Mode Electrical Requirements
Figure E-1 Pins Available for Reconfiguration over the Full-Featured Cable
Figure E-2 Pins Available for Reconfiguration for Direct Connect Applications
350 Figure E-3 Alternate Mode Implementation using a USB Type-C to USB Type-C Cable
351 E.3 Parameter Values
Figure E-4 Alternate Mode Implementation using a USB Type-C to Alternate Mode Cable or Device
Table E-1 USB Safe State Electrical Requirements
352 E.4 Example Alternate Mode – USB DisplayPort™ Dock
E.4.1 USB DisplayPort™ Dock Example
Table E-2 USB Billboard Device Class Availability Following Alternate Mode Entry Failure
Table E-3 Alternate Mode Signal Noise Ingression Requirements
353 E.4.2 Functional Overview
Figure E-5 USB DisplayPort Dock Example
354 E.4.3 Operational Summary
355 F Thunderbolt 3 Compatibility Discovery and Entry
F.1 TBT3 Compatibility Mode Functional Requirements
F.1.1 TBT3-Compatible Power Requirements
F.1.2 TBT3-Compatible Host Requirements
F.1.3 TBT3-Compatible Device Upstream Requirements
F.1.4 TBT3-Compatible Device Downstream Requirements
356 F.1.5 TBT3-Compatible Self-Powered Device Without Predefined Upstream Port Rules
F.1.6 TBT3-Compatible Devices with a Captive Cable
F.2 TBT3 Discovery and Entry Flow
357 Figure F-1 TBT3 Discovery Flow
358 F.2.1 TBT3 Passive Cable Discover Identity Responses
Table F-1 TBT3 Passive Cable Discover Identity VDO Responses
359 Table F-2 TBT3 Passive Cable VDO for USB PD Revision 2.0, Version 1.3
Table F-3 TBT3 Passive Cable VDO for USB PD Revision 3.0, Version 1.2
360 F.2.2 TBT3 Active Cable Discover Identity Responses
Table F-4 TBT3 Active Cable Discover Identity VDO Responses
361 Table F-5 TBT3 Active Cable VDO for USB PD Revision 2.0, Version 1.3
Table F-6 TBT3 Active Cable VDO 1 for USB PD Revision 3.0, Version 1.2
362 Table F-7 TBT3 Active Cable VDO 2 for USB PD Revision 3.0, Version 1.2
363 F.2.3 TBT3 Device Discover Identity Responses
Table F-8 TBT3 Device Discover Identity VDO Responses
364 F.2.4 TBT3 Discover SVID Responses
Table F-9 TBT3 Discover SVID VDO Responses
365 F.2.5 TBT3 Device Discover Mode Responses
Table F-10 TBT3 Device Discover Mode VDO Responses
366 F.2.6 TBT3 Cable Discover Mode Responses
Table F-11 TBT3 Cable Discover Mode VDO Responses
367 F.2.7 TBT3 Cable Enter Mode Command
Table F-12 TBT3 Cable Enter Mode Command
368 F.2.8 TBT3 Device Enter Mode Command
Table F-13 TBT3 Device Enter Mode Command
369 F.2.9 TBT3 Cable Functional Difference Summary
Table F-14 TBT3 Cable Functional Difference Summary

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