USB-IF Compliance Updates

Number of Updates: 7

Table of Contents
ID Updated Subject Reason Mandate Effective Date
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

27 May, 2007 Mini-AB Receptacle, Mini-A Receptacle and Mini-A plug are Antiquated End of life for Mini-AB Receptacle, Mini-A Receptacle and Mini-A plug Required March, 2007

Mini-AB Receptacle, Mini-A Receptacle and Mini-A plug are Antiquated
Mandate: Required
Effective Date: March, 2007
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    The Mini-AB receptacle has been replaced by the Micro-AB receptacle.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    The Mini-A plug has been replaced by the Micro-A plug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.

The original announcement may be obtained at http://www.usb.org/developers/Deprecation_Announcement_052507.pdf

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

The Micro-USB Specification can be downloaded from the Cable and Connector Approved Class Documents webpage at http://www.usb.org/developers/devclass_docs#approved

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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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