USB-IF Compliance Updates

Number of Updates: 15

Table of Contents
ID Updated Subject Reason Mandate Effective Date
141 June, 2021 Vector Network Analyzer (or Equivalent) Approval Program Informational June, 2021

140 June, 2021 Deprication of 100W USB Type-C to USB Type-C Cables Replaced by 240W USB Type-C to USB Type-C Cables Required June, 2021

135 May, 2021 Chokes Allowed Only in USB-C to USB-C Cable Assemblies Clarify the use of chokes in compliant USB cable assemblies Required May, 2021

128 March, 2021 End of life for USB 3.x Micro-B Connector Certifications Products are Expected to Transition to USB-C Required February, 2021

27 March, 2021 Mini Connectors Antiquated End of life for Mini Connector Certifications Required March, 2021

123 November, 2019 USB 2.0 Standard-A Automotive Specific Connectors Compliance Program Allow for automotive specific applications to use certified connectors Required November, 2019

115 March, 2018 Gen 2 stacked connectors not allowed EMI and RFI Required April, 2018

107 August, 2016 USB Type-C Adapters Without Cable Test Exceptions Cable Flex and Cable Pull Out Not Required. Required August, 2016

100 March, 2015 Type C Engineering Change Notices Publication of Type C ECNs Informational March, 2015

89 April, 2013 Maximum Length of Cable Assemblies that Implement MicroUSB Connectors USB 3.0 ECN #19 decreases differential insertion loss of MicroUSB Cable Assemblies. Required May, 2013

73 April, 2013 USB 3.0 Cable Assembly Maximum Lengths Clarification on the maximum lengths allowed for SuperSpeed cable assemblies Required October, 2010

63 March, 2009 ID Pin Resistance on Mini B-plugs and Micro B-plugs Increased to 1 Mohm ECN changes Rb_PLUG_ID >= 1MOhm to enable USB charger detection Required December, 2009

47 March, 2009 USB Connector Construction Enforcement of USB Connector Construction Required December, 2007

46 March, 2009 New Group 8 Test - ID Pin Resistance Measurement Validates proper implementation of the ID pin for mini- and micro-USB plugs. Required December, 2007

60 March, 2009 ECN Allows Use of Alternate Materials in Cable and Connectors Enables the use of non-hazardous and cost effective materials Optional December, 2008

Type C Engineering Change Notices
Mandate: Informational
Effective Date: March, 2015
The USB-IF has published 25 Engineering Change Notices related to the USB Type-C Cable and Connector Specification. The ECNs are included with the download of the USB 3.1 Specification.
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USB Type-C Adapters Without Cable Test Exceptions
Mandate: Required
Effective Date: August, 2016

USB Type-C Adapter Cables without raw cable are not required to test Cable Pull Out or Cable Flex tests.

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Gen 2 stacked connectors not allowed
Mandate: Required
Effective Date: April, 2018

The USB-IF does not certify legacy or USB Type-C(tm) Gen 2 stacked connectors.

The USB-IF does certify legacy or USB Type-C(tm) Gen 1 stacked connectors.

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USB 2.0 Standard-A Automotive Specific Connectors Compliance Program
Mandate: Required
Effective Date: November, 2019

The USB-IF recognizes that automotive specific products are in some cases subject to more strenuous and rigorous testing standards. Until now the USB-IF has not allowed the certification of customized automotive specific connectors as these connectors were not able to complete the USB cable and connector compliance program. USB 2.0 Standard-A automotive specific connectors are now eligible for certification by following the below compliance requirements.

1. Confirm via email to techadmin@usb.org that the connector seeking certification will only be used in an automotive environment and no other environment.
2. Confirm via email to techadmin@usb.org that these connectors are USB 2.0 Standard-A connectors.
3. Confirm via email to techadmin@usb.org that your internal lab has an A2LA or equivalent accreditation.
4. Register the connector on https://cms.usb.org/register-product and say "Yes" to the automotive specific question. Select a test lab to perform USB Critical Dimensions tests. The connector must pass all Critical Dimension requirements.
5. Provide internal test results to the USB-IF authorized test lab you selected. The test results must clearly show that the connector has met the USB 2.0 cable and connector compliance program requirements for the following groups. A side by side comparison is preferred. If test performed by the vendor differ from the CabCon requirements the USB-IF will review each test case and accept or reject the test methodology.
 

               a. Group 1 Durability
               b. Group 2 Temperature Life
               c. Group 3 Mixed Flowing Gas
               d. Group 4 Insulation Resistance, Dielectric Withstanding Voltage, Thermal Shock and Humidity Temperature
               e. Group 5 Solderability

 

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End of life for USB 3.x Micro-B Connector Certifications
Mandate: Required
Effective Date: February, 2021

With the introduction of USB Type-CŪ, the USB-IF will end all USB 3.x Micro-B and Micro-AB connector certifications after February 28th, 2021.

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Chokes Allowed Only in USB-C to USB-C Cable Assemblies
Mandate: Required
Effective Date: May, 2021

It has been a long standing policy that chokes are not allowed in any non-USB-C cable assemblies. This update clarifies that chokes are only allowed in USB-C to USB-C cables. USB-C to Legacy cables that include chokes are not compliant.

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Deprication of 100W USB Type-C to USB Type-C Cables
Mandate: Required
Effective Date: June, 2021

Effective Immediately 100 Watt USB Type-C to USB Type-C cables are replaced by 240W USB Type-C to USB Type-C cables as per Table 3-1, Note 1, of the USB Type-C Cable and Connector Specification Release 2.1, May 2021.

The USB-IF will no longer certify any 100W Cables on December 22nd, 2021.

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Vector Network Analyzer (or Equivalent) Approval Program
Mandate: Informational
Effective Date: June, 2021

The USB-IF is creating a program for approving Vector Network Analyzer (or equivalent) equipment for USB-IF cable and connector signal quality testing.

 

This program will allow for the creation of a public list of USB-IF approved Vector Network Analyzer (or equivalent) equipment for the use of USB-IF certification testing of the following USB Cable and Connector Test Groups:

 

USB Type-C Cables (USB-C to USB-C and USB-C to USB-A):

 

            A-8: USB4 Gen3 Receptacle Signal Tests

B-2: USB2.0 and Low Speed Signal Tests of Type-C Cable and Adapter Assemblies

            B-3: USB SuperSpeed Signal Tests of Type-C Cable and Adapter Assemblies

            B-4: USB Type-C Cables Shielding Effectiveness

            B-8: USB4 Gen3 Signal Tests

 

Standard USB 2.0 Cables (Any USB-A to USB-B):

Group-6: High Frequency Testing

 

Standard USB 3.2 Cables (Any USB-A to USB-B):

Group-B-4: High Speed Testing

           

Test equipment vendors seeking USB-IF approval will be sent the following USB cables. These cables must be tested fully against the applicable test groups in both orientations.

            USB Type-C to USB Type-C (USB4 Gen3-40 Gbps)

            USB Type-C to USB Type-C (USB3.2 Gen2-10 Gbps)

            USB Type-C to USB Type-A (USB3.2 Gen2-10 Gbps)

            USB Type-A to USB Type-B (USB3.2 Gen 2-10 Gbps)

 

Please submit the results to techadmin@usb.org. Your results will be compared to official USB-IF results. The USB-IF will then inform you of your correlation status and if additional correlation work is needed before approval.

 

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Mini Connectors Antiquated
Mandate: Required
Effective Date: March, 2021
Use of the following connectors is prohibited and products that use them are not eligible for certification.
  • Mini-AB Receptacle
    The Mini-AB receptacle has been replaced by the Micro-AB receptacle.
  • Mini-A Plug
    The Mini-A plug has been replaced by the Micro-A plug
  • Mini-A Receptacle
    There is no Micro-A equivalent to the Mini-A receptacle. The Micro-A plug is for use by peripherals dedicated to OTG devices.

Integrators are encouraged to transition their products to USB Type-C connector; however, use of the Mini-B connector is still permitted.

Although the Mini-B connector is still permitted to be used for the time being, the certification of the Mini-B connector, both receptacle and plug, is no longer available.

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New Group 8 Test - ID Pin Resistance Measurement
Mandate: Required
Effective Date: December, 2007

New test is added to Group 8 of the Cable and Connector Class Document:

Cable assemblies that have a MicroUSB or MiniUSB plugs must have the ID pin's resistance to ground verified. 

  • The MicroUSB A-Plug must have its ID pin 4 grounded with <10 Ohms (Ra_PLUG_ID). 
  • The MicroUSB B-Plug or a MiniUSB B-plug must have a resistance to ground greater than 1MOhms (Rb_PLUG_ID) on the ID pin.  Please note that Rb_PLUG_ID has been changed to 1 MOhms per an Engineering Change Notice (ECN).

In order to receive certification, cable assemblies that implement the MicroUSB or MiniUSB plugs must pass this test.  Please see Section 4.2 of the Micro-USB Specification for details.

 

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USB Connector Construction
Mandate: Required
Effective Date: December, 2007

USB connectors must contain the exact number of contacts as specified in the USB 2.0 Specification. More or fewer contacts are not permitted.  No two contacts may be interconnected (joined, shorted or tied) together with the exception of pins 4 and 5 of the Micro A-plug. 

Verification of these compliance rules is to be done in Test Group 7 for connectors.  Cable assemblies are to have these rules verified in Test Group 8.

Standard A-series and B-series Connectors:
·   Pin Count: 4
·   No interconnected pins.

Mini A-series Connectors:
·   PROHIBITED

Mini AB-receptacle Connectors:
·   PROHIBITED

Mini B-series Connectors:
·   Pin Count: 5
·   No Interconnected pins.

Micro B-series Connectors:
·   Pin Count: 5
·   No Interconnected pins.

Micro AB-receptacle Connectors:
·   Pin Count: 5
·   No Interconnected pins.

Micro A-plug Connector:
·   Pin Count: 5
·   Pin 4 and Pin 5 may be interconnected with a resistance less than 10 Ohms. No other pins may be interconnected.

Interconnected pins may be verified by using an Ohm meter. The sequence for verifying the pins follows:

Pins

Passing Result

1 - 2

Open

1 - 3

Open

1 - 4

Open

1 - 5

Open

1 - Shell

Open

2 - 3

Open

2 - 4

Open

2 - 5

Open

2 - Shell

Open

3 - 4

Open

3 - 5

Open

3 - Shell

Open

4 - 5

Micro A-plug < = 10 Ohms
Micro B-plug >= 1 MOhms
Mini B-plug >= 1 MOhms
Mini and Micro receptacles = Open

4 - Shell

Open

5 - Shell

Open

 

 

 

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ECN Allows Use of Alternate Materials in Cable and Connectors
Mandate: Optional
Effective Date: December, 2008
An ECN is published with the USB 2.0 Specification that allows the use of alternate materials in specific areas of cable and connectors. The alternate materials must still meet the performance requirements defined by the USB 2.0 Specification and the "Cable and Connector Class Document." Please review the ECN for specific details.
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ID Pin Resistance on Mini B-plugs and Micro B-plugs Increased to 1 Mohm
Mandate: Required
Effective Date: December, 2009
The resistance to ground on ID pin 4 for mini B-plugs and micro B-plugs has been increased to 1,000,000 Ohms minimum. The Engineering Change Notice is part of the download of the USB 2.0 Specification.
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USB 3.0 Cable Assembly Maximum Lengths
Mandate: Required
Effective Date: October, 2010

SuperSpeed USB cable assemblies must use USB 3.0 connectors only .

  • USB 3.0 cable assemblies that implement a USB 3.0 micro series plug:  1 meters maximum length.
  • USB 3.0 cable assemblies that do not implement a USB 3.0 micro series plug:  3 meters maximum length.
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Maximum Length of Cable Assemblies that Implement MicroUSB Connectors
Mandate: Required
Effective Date: May, 2013

Effective immediately, a SuperSpeed USB cable assembly that has at least one micro-USB plug is limited to 1 meter in length and must have a maximum differential insertion loss of 3.5dB.

Reference: "ECN 019 USB.0 MicroB Cable Loss Specification" which is included with the download of the USB 3.0 Specification.

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