IEC 62680-2-2:2015

IEC 62680-2-2 ®
Edition 1.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Universal serial bus interfaces for data and power –
Part 2-2: Micro-USB Cables and Connectors Specification, Revision 1.01

Interfaces de bus universel en série pour les données et l'alimentation électrique –
Partie 2-2: Spécification des câbles et connecteurs micro-USB, révision 1.01
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IEC 62680-2-2 ®
Edition 1.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Universal serial bus interfaces for data and power –

Part 2-2: Micro-USB Cables and Connectors Specification, Revision 1.01

Interfaces de bus universel en série pour les données et l'alimentation électrique –

Partie 2-2: Spécification des câbles et connecteurs micro-USB, révision 1.01

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220; 33.120; 35.200 ISBN 978-2-8322-5544-5

– 2 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
UNIVERSAL SERIAL BUS INTERFACES
FOR DATA AND POWER –
Part 2-2: Micro-USB Cables and
Connectors Specification, Revision 1.01

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62680-2-2 has been prepared by technical area 14: Interfaces and
methods of measurement for personal computing equipment, of IEC technical committee 100:
Audio, video and multimedia systems and equipment.
The text of this standard is based on documents prepared by the USB Implementers Forum
(USB-IF). The structure and editorial rules used in this publication reflect the practice of the
organization which submitted it.
This first edition cancels and replaces IEC 62680-2 published in 2013. This edition constitutes
a technical revision.
© USB-IF 2014
This bilingual version (2018-05) corresponds to the English version, published in 2015-09.
The text of this standard is based on the following documents:
CDV Report on voting
100/2332/CDV 100/2435/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
A list of all the parts in the IEC 62680 series, published under the general title Universal serial
bus interfaces for data and power can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 4 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
INTRODUCTION
The IEC 62680 series is based on a series of specifications that were originally developed by
the USB Implementers Forum (USB-IF). These specifications were submitted to the IEC under
the auspices of a special agreement between the IEC and the USB-IF.
The USB Implementers Forum, Inc.(USB-IF) is a non-profit corporation founded by the group
of companies that developed the Universal Serial Bus specification. The USB-IF was formed
to provide a support organization and forum for the advancement and adoption of Universal
Serial Bus technology. The Forum facilitates the development of high-quality compatible USB
peripherals (devices), and promotes the benefits of USB and the quality of products that have
passed compliance testing.
ANY USB SPECIFICATIONS ARE PROVIDED TO YOU "AS IS, "WITH NO WARRANTIES
WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-
INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE. THE USB
IMPLEMENTERS FORUM AND THE AUTHORS OF ANY USB SPECIFICATIONS DISCLAIM
ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY
RIGHTS, RELATING TO USE OR IMPLEMENTATION OR INFORMATION IN THIS
SPECIFICATION.
THE PROVISION OF ANY USB SPECIFICATIONS TO YOU DOES NOT PROVIDE YOU
WITH ANY LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY
INTELLECTUAL PROPERTY RIGHTS.
Entering into USB Adopters Agreements may, however, allow a signing company to
participate in a reciprocal, royalty-free licensing arrangement for compliant products. For more
information, please see:
http://www.usb.org/developers/docs/
http://www.usb.org/developers/devclass_docs#approved
IEC DOES NOT TAKE ANY POSITION AS TO WHETHER IT IS ADVISABLE FOR YOU TO
ENTER INTO ANY USB ADOPTERS AGREEMENTS OR TO PARTICIPATE IN THE USB
IMPLEMENTERS FORUM.”
This series covers the Universal Series Bus interfaces for data and power and consists of the
following parts:
IEC 62680-1-1, Universal Serial Bus interfaces for data and power – Part 1-1: Common
components – USB Battery Charging Specification, Revision 1.2
IEC 62680-2-1, Universal Serial Bus interfaces for data and power – Part 2-1: Universal
Serial Bus Specification, Revision 2.0
IEC 62680-2-2, Universal Serial Bus interfaces for data and power – Part 2-2: USB Micro-
USB Cables and Connectors Specification, Revision 1.01
IEC 62680-2-3, Universal Serial Bus interfaces for data and power – Part 2-3: Universal
Serial Bus Cables and Connectors Class Document Revision 2.0
This part of the IEC 62680 series consists of several distinct parts:
• the main body of the text, which consists of the original specification and all ECN and
Errata developed by the USB-IF.

© USB-IF 2014
CONTENTS
FOREWORD . 2
INTRODUCTION . 4
1 Introduction . 10
1.1 General . 10
1.2 Objective of the Specification . 10
1.3 Intended Audience/Scope . 10
1.4 Related Documents . 10
2 Acronyms and Terms . 10
3 Significant Features . 11
3.1 USB 2.0 Specification Compliance . 11
3.2 On-The-Go Device . 12
3.3 Connectors . 12
3.4 Compliant Cable Assemblies . 12
3.5 Plug Overmolds . 12
4 Cables and Connectors . 13
4.1 Introduction . 13
4.2 Micro-Connector Mating . 13
4.3 Color Coding . 13
4.4 Device, Cable and Adapter Delays . 14
4.5 Compliant Usage of Connectors and Cables . 15
4.5.1 Cables . 15
4.5.2 Overmolds . 15
4.5.3 Mechanical Interfaces) . 15
4.5.4 Surface mount standard version drawings . 15
4.5.5 DIP-type and Midmount-type receptacles . 15
4.5.6 Connector Keying . 15
4.5.7 Right Angle Plugs . 15
4.5.8 Adapters . 16
4.6 Drawings. 17
5 Electrical Compliance Requirements. 35
5.1 Data Rates Beyond USB 2.0 (480 Mb/s -->) . 36
5.2 Low Level Contact Resistance . 36
5.3 Contact Current Rating . 36
5.3.1 Signal Contacts Only (2, 3, and 4) . 36
5.3.2 With Power Applied Contacts (1 and 5) . 36
6 Mechanical Compliance Requirements . 36
6.1 Operating Temperature Range . 36
6.1.1 Option I . 36
6.1.2 Option II . 36
6.2 Insertion Force . 36
Recommendations: . 36
6.3 Extraction Force. 36
6.4 Plating . 37
Recommendations: . 37
6.4.1 Option I . 37
6.4.2 Option II . 37

– 6 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
6.5 Solderability . 37
6.6 Peel Strength (Reference Only) . 37
6.7 Wrenching Strength (Reference Only) . 37
6.8 Lead Co-Planarity . 37
6.9 RoHS Compliance . 37
6.10 Shell & Latch Materials . 38

Figure 4-1 – Micro-A to Micro-B Cable . 17
Figure 4-2 – Standard-A to Micro-B Cable . 18
Figure 4-3 – Micro-A to Captive Cable . 19
Figure 4-4 – Micro-A Plug Overmold, Straight . 20
Figure 4-5 – Micro-B Plug Overmold, Straight . 21
Figure 4-6 – Micro-A Plug Interface . 22
Figure 4-7 – Micro-B Plug Interface . 23
Figure 4-8 – Micro-A/B Plug Interface (Cut-section) . 24
Figure 4-9 – Micro-AB receptacle interface . 25
Figure 4-10 – Micro-B receptacle interface . 26
Figure 4-11 – Micro-AB Receptacle Design . 27
Figure 4-12 – Micro-B Receptacle Design . 28
Figure 4-13 – Micro-A Plug Blockage . 29
Figure 4-14 – Micro-B Plug Blockage . 30
Figure 4-15 – Micro-A Plug, Side Right Angle . 31
Figure 4-16 – Micro-A Plug, Down Right Angle . 32
Figure 4-17 – Micro-B Plug, Side Right Angle . 33
Figure 4-18 – Micro-B Plug, Down Right Angle . 34
Figure 4-19 – Adapter, Standard-A receptacle to Micro-A plug . 35
Figure 4-9 – Micro-AB receptacle interface . 40
Figure 4-10 – Micro-B receptacle interface . 41

Table 4-1 – Plugs Accepted By Receptacles . 13
Table 4-2 – Micro-A Plug Pin Assignments . 13
Table 4-3 – Color Coding for Plugs and Receptacles . 14
Table 4-4 – Maximum Delay for Micro-Connector and Cable . 14
Table 4-5 – Maximum Delay for Standard Connector Cable . 14

Note: All Engineering Change Notice’s (ECN) and Errata documents as of September 01,
2012 that pertain to this core specification follow the last page of the specification
starting on page 39.
© USB-IF 2014
Universal Serial Bus
Micro-USB Cables and Connectors
Specification
Revision 1.01
April 4, 2007
Revision History
Revision Issue Date Comment
0.6 1/30/2006 Revisions to all sections
0.7 3/24/2006 Added revised Micro-USB drawings to Rev.0.8
0.8 4/19/2006 Editorial changes and additions by Jan Fahllund (Nokia)
0.8b 4/26/2006 Corrections to the 0.8 version (based by comments from contributors)
0.9 6/7/2006 Corrections based on comments from the 0.8b version
1.0RC 8/2/2006 Added lubricant recommendation, LLRC delta change specified
1.01RC 11/10/2006 Editorial changes and addition based on Oct-06 USB-IF CCWG meeting.
1.02RC 12/10/2006 Shell material thickness tolerances changed so that material can be
0.25 mm or 0.3 mm; edited three pictures (Figure 4-10, 4-11 and 4-12).
1.03RC 12/11/2006 Two pictures edited (Figure 4-8 and 4-9). In fig 4-8 max height to be
2.8 mm MAX. In fig 4-9 R0.25 mm MAX to be R0.30 mm MAX.
1.0RC3 12/19/2006 For BoD approval
1.0 1/12/2007 Approved
1.0 1/22/2007 Cosmetic edits for publication
1.01 4/4/2007 Editorial corrections and additions to contributor list. Reinserted shell and
plug material requirements as section 6.10, Clarified wording on Plating
Recommendations.
All rights reserved.
– 8 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
A LICENSE IS HEREBY GRANTED TO REPRODUCE THIS SPECIFICATION FOR INTERNAL
USE ONLY. NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR
OTHERWISE, IS GRANTED OR INTENDED HEREBY.
USB-IF AND THE AUTHORS OF THIS SPECIFICATION EXPRESSLY DISCLAIM ALL
LIABILITY FOR INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, RELATING TO
IMPLEMENTATION OF INFORMATION IN THIS SPECIFICATION. USB-IF AND THE
AUTHORS OF THIS SPECIFICATION ALSO DO NOT WARRANT OR REPRESENT
THATSUCH IMPLEMENTATION(S) WILL NOT INFRINGE THE INTELLECTUAL PROPERTY
RIGHTS OF OTHERS.
THIS SPECIFICATION IS PROVIDED "AS IS" AND WITH NO WARRANTIES, EXPRESS OR
IMPLIED, STATUTORY OR OTHERWISE. ALL WARRANTIES ARE EXPRESSLY
DISCLAIMED. NO WARRANTY OF MERCHANTABILITY, NO WARRANTY OF NON-
INFRINGEMENT, NO WARRANTY OF FITNESS FOR ANY PARTICULAR PURPOSE, AND
NOWARRANTY ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE.
IN NO EVENT WILL USB-IF OR USB-IF MEMBERS BE LIABLE TO ANOTHER FOR THE
COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS OF
USE, LOSS OF DATA OR ANY INCIDENTAL, CONSEQUENTIAL, INDIRECT, ORSPECIAL
DAMAGES, WHETHER UNDER CONTRACT, TORT, WARRANTY, OR OTHERWISE,
ARISING IN ANY WAY OUT OF THE USE OF THIS SPECIFICATION, WHETHER OR NOT
SUCHPARTY HAD ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
All product names are trademarks, registered trademarks, or service marks of their respective
owners.
© USB-IF 2014
Contributors
Mark Rodda, (editor) Motorola Yoichi Nakazawa, JST
Jan Fahllund, (editor) Nokia Kevin Fang, Longwell Electronics
Jim Koser, (CCWG Chairman), Foxconn Morgan Jair, Main Super Co.
Ed Beeman, 2010 Tech Tom Kawaguchi, Matsushita Electric Works
Glen Chandler, Advanced-Connectek (Acon) Ron Ward, Matsushita Electric Works
Charles Wang, Advanced-Connectek (Acon) Satoshi Yamamoto, Matsushita Electric Works
Toshinori Sasaki, Across Techno Yasuhiko Shinohara, Mitsumi
Minoru Ohara, Allion Atsushi Nishio, Mitsumi
Brad Brown, ATL Hitoshi Kawamura, Mitsumi
Christopher Mattson, ATL Scott Sommers, Molex
Marcus Darrington, ATL Kevin Delaney, Molex
Jaremy Flake, ATL Technology Kieran Wright, Molex
George Olear, Contech Research Padraig McDaid, Molex
Roy Ting, Elka Mikko Poikselka, Molex
Sophia Liu, ETC Sam Liu, Newnex Technology Corp.
Bill Northey, FCI Richard Petrie, Nokia
Tsuneki Watanabe, Foxconn Kai Silvennoinen, Nokia
Jim Zhao, Foxconn Panu Ylihaavisto, Nokia
David Ko, Foxconn Arthur Zarnowitz, Palm
Jong Tseng, Foxconn Douglas Riemer, SMK
Jack Lu, Foxlink Eric Yagi, SMK
Tim Chang, Foxlink Abid Hussain, Summit Microelectronics
Sathid Inthon, Fujikura Kaz Osada, Tyco
Toshi Mimura, Fujijura Masaru Ueno, Tyco
Alan Berkema, Hewlett-Packard Yoshikazu Hirata, Tyco
Karl Kwiat, Hirose Mark Paxson, VTM Inc.
Shinya Tono, Hirose
Kazu Ichikawa, Hirose
Ryozo Koyama, Hirose
Yousuke Takeuchi, Hirose
Tsuyoshi Kitagawa, Hosiden
Jim Eilers, Hosiden
Kazuhiro Saito, JAE
Ron Muir, JAE
Mark Saubert, JAE
Yasuhira Miya, JST
Takahiro Diguchi, JST
– 10 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
UNIVERSAL SERIAL BUS INTERFACES
FOR DATA AND POWER –
Part 2-2: Micro-USB Cables and
Connectors Specification, Revision 1.01

1 Introduction
1.1 General
USB has become a popular interface for exchanging data between cell phone and portable
devices. Many of these devices have become so small it is impossible to use standard USB
components as defined in the USB 2.0 specification. In addition the durability requirements of
the Cell Phone and Portable Devices market exceed the specifications of the current
interconnects. Since Cell Phones and other small Portable Devices are the largest market
potential for USB, this specification is addressing this very large market while meeting all the
requirements for electrical performance within the USB 2.0 specification.
1.2 Objective of the Specification
The purpose of this document is to define the requirements and features of a Micro-USB
connector that will meet the current and future needs of the Cell Phone and Portable Devices
markets, while conforming to the USB 2.0 specification for performance, physical size and
shape of the Micro-USB interconnect.
This is not a stand-alone document. Any aspects of USB that are not specifically changed by
this specification are governed by the USB 2.0 Specification and USB On-The-Go Supplement.
1.3 Intended Audience/Scope
Cell phone and Portable Devices have become so thin that the current Mini-USB does not fit
well within the constraints of future designs. Additional requirements for a more rugged
connector that will have durability past 10 000 cycles and still meet the USB 2.0 specification
for mechanical and electrical performance was also a consideration. The Mini-USB could not
be modified and remain backward compatible to the existing connector as defined in the USB
OTG specification.
1.4 Related Documents
USB 2.0
USB OTG Supplement
2 Acronyms and Terms
This chapter lists and defines terms and abbreviations used throughout this specification.
A-Device A device with a Type-A plug inserted into its receptacle. The A-device
supplies power to VBUS and is host at the start of a session. If the A-
device is On-The-Go, it may relinquish the role of host to an On-The-Go
B-device under certain conditions,

© USB-IF 2014
Application A generic term referring to any software that is running on a device that
can control the behavior or actions of the USB port(s) on a device.
B-Device A device with a Type-B plug inserted into its receptacle. The B-device is
a peripheral at the start of a session. If the B-device is OTG, it may be
granted the role of host from an OTG A-device.
DIP-type A connector with contact and shield solder tails that are soldered through
the printed circuit board.
FS Full Speed (max 12 Mb/s)
Higher than HS
(480 Mb/s ---> 5 Gb/s)
HS High Speed (max 480 Mb/s)
Host A physical entity that is attached to a USB cable and is acting in the role
of the USB host as defined in the USB Specification, Revision 2.0. This
entity initiates all data transactions and provides periodic Start of Frames.
HNP Host Negotiation Protocol
ID Identification. Denotes the pin on the Micro connectors that is used to
differentiate a Micro-A plug from a Micro-B plug.
LS Low Speed (max 1,5 Mb/s)
Midmount-type A connector that is mounted in a cut-out in the printed circuit board
between the top and bottom surfaces.
OTG On-The-Go
OTG device A device with the host and peripheral capabilities
Peripheral A physical entity that is attached to a USB cable and is currently
operating as a “device” as defined in the USB Specification, Revision 2.0.
The Peripheral responds to low level bus requests from the Host.
PCB Printed circuit board
USB Universal Serial Bus
USB-IF
USB Implementers Forum
3 Significant Features
This section identifies the significant features of the Micro-USB specification. The purpose of
this section is not to present all the technical details associated with each major feature, but
rather to highlight its existence. Where appropriate, this section references other parts of the
document where further details can be found.
3.1 USB 2.0 Specification Compliance
Any device with Micro-USB features is first and foremost a USB peripheral that is compliant
with the USB 2.0 specification.

– 12 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
3.2 On-The-Go Device
Any OTG Micro-USB device shall conform to the OTG requirements as set forth in the On-
The-Go Supplement to the USB 2.0 Specification.
3.3 Connectors
The USB 2.0 specification defines the following connectors:
• Standard-A plug and receptacle,
• Standard-B plug and receptacle, and
• Mini-B plug and receptacle.
The Micro-USB specification defines the following additional connectors:
• Micro-B plug and receptacle
• Micro-AB receptacle
• Micro-A plug.
The Micro-AB receptacle is only allowed on OTG products. All other uses of the Micro-AB
receptacle are prohibited. The Micro-AB receptacle accepts either a Micro-A plug or a Micro-B
plug.
It is recommended that the Micro-AB continue to support HNP as requested and support full
functionality as a peripheral when a Micro-B plug is inserted.
3.4 Compliant Cable Assemblies
The USB 2.0 specification defines the following cables:
• Standard-A plug to Standard–B plug,
• Standard-A plug to Mini-B plug, and
• Captive cable with Standard-A plug.
The Micro-USB specification defines the following additional cables:
• Micro-A plug to Micro-B plug,
• Micro-A plug to Standard-A receptacle
• Micro-B plug to Standard-A plug, and
• Hardwired Captive cable with Micro-A plug. (Hardwired Captive cable is a cable,
connected internally to a device, which is not designed to be removed by the end user of
that device.)
No other types of cables are allowed by either the USB specification, or by the OTG
supplement. Cables are not allowed to have receptacles on either end unless they meet the
mechanical and electrical requirements of adapters defined in this document.
3.5 Plug Overmolds
The Micro-USB specification constrains the size and the shape of the overmolds for the Micro-
A and Micro-B plugs.
The Micro-A plug’s overmold has a rectangular shape, and the Micro-B plug’s overmold is
rectangular with chamfers. This allows easy recognition and differentiation of the two plugs
by the consumer. See pictures Figure 4-4 and Figure 4-5.

© USB-IF 2014
4 Cables and Connectors
4.1 Introduction
This chapter provides the mechanical and electrical specifications for the cables, connectors
and cable assemblies used to interconnect devices as well as constraints on the design of the
overmolds for the Micro-A and Micro-B plugs.
4.2 Micro-Connector Mating
The following table summarizes the plugs accepted by each of the receptacles.
Table 4-1 – Plugs Accepted By Receptacles
Receptacle Plugs Accepted
Standard-A Standard-A
Standard-B Standard-B
Mini-B Mini-B
Micro-B Micro-B
Micro-AB Micro-A or Micro-B
The usage and wiring assignments of the five pins in the Micro-A plug are defined in the
following table.
Table 4-2 – Micro-A Plug Pin Assignments
Typical Wiring
Contact Number Signal Name
Assignment
1 VBUS Red
2 D- White
3 Green
D+
4 ID 5 GND Black
Shell Shield Drain Wire
The ID pin on a Micro-A plug shall be connected to the GND pin. The ID pin on a Micro-B
plug is not connected or is connected to ground by a resistance of greater than Rb_PLUG_ID
(100 kΩ MIN). An On-The-Go device is required to be able to detect whether a Micro-A or
Micro-B plug is inserted by determining if the ID pin resistance to ground is less than
Ra_PLUG_ID (10 Ω MAX) or if the resistance to ground is greater than Rb_PLUG_ID . Any ID
resistance less than Ra_PLUG_ID shall be treated as ID = FALSE and any resistance greater
than Rb_PLUG_ID shall be treated as ID = TRUE.
4.3 Color Coding
The following colors are mandated for the plastic inside the Micro-USB connectors defined in
this specification.
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© USB-IF 2014
Table 4-3 – Color Coding for Plugs and Receptacles
Connector Color
Micro-A plug White
Micro-B receptacle Black
Micro-B plug Black
Micro-AB receptacle Gray
4.4 Device, Cable and Adapter Delays
In Figure 7-11 of the USB 2.0 specification, four test planes are defined along the
transmission path from the host transceivers to the peripheral transceivers. These test planes
(TP) are as follows:
• TP1: pins of host transceiver chip
• TP2: contact points of host Standard-A receptacle
• TP3: contact points of peripheral Standard-B or Micro-B receptacle
• TP4: pins of peripheral transceiver chip
The maximum total delays are as follows:
• On-The-Go device – TP1 to TP2: 1 ns
• Adapter: 1 ns
• Any cable with a Micro-A or Micro-B plug: 10 ns
The maximum delays for the two worst cases of connection are shown in the following tables.
Table 4-4 – Maximum Delay for Micro-Connector and Cable
Location Delay Time
USB 2.0 Compliant Host – TP1 to TP2 3 ns
Standard-A receptacle to Micro-A plug adapter 1 ns
Micro-A plug to Micro-B plug cable 10 ns
USB 2.0 Compliant B-device – TP3-TP4 1 ns
Total 15 ns
Table 4-5 – Maximum Delay for Standard Connector Cable
Location Delay Time
On-The-Go Compliant Device – TP1 to TP2 1 ns
Micro-A plug to Standard-A receptacle adapter 1 ns
Standard-A plug to Standard-B plug cable 26 ns
USB 2.0 Compliant B-device – TP3 to TP4 1 ns
Total 29 ns
© USB-IF 2014
4.5 Compliant Usage of Connectors and Cables
Cable assemblies and connectors not described below or not allowed by other amendments to
the USB specification are not compliant with the USB specification and may not be labeled as
such.
4.5.1 Cables
The cables allowed by the Micro-USB specification are shown in Figure 4-1, Figure 4-2, and
Figure 4-3. Cables must have a propagation delay of 10 ns or less, have a physical length of
no more than 2.0 meters, and meet all other requirements of a USB cable.
4.5.2 Overmolds
The size and shape of the Micro-A and Micro-B plug overmolds must conform to the
constraints shown in Figure 4-4 and Figure 4-5 .
4.5.3 Mechanical Interfaces)
The mechanical interface dimensions for the Micro-A and Micro-B plugs are shown in
Figure 4-6, Figure 4-7 and Figure 4-7. Mechanical interface dimensions for Micro-AB and
Micro-B receptacles are shown in Figure 4-9 and Figure 4-10.
4.5.4 Surface mount standard version drawings
By following these instructions, receptacles from different manufacturers can be used
interchangeably on the same printed circuit board (PCB). In the case of the ”surface mount
standard version”, the dimensions of the contact tail and shield tail must comply with figures
4-11 and 4-12.
NOTE PCB-layout drawings are included for reference only.
Figure 4-11 and Figure 4-12 shows designs for the Micro-AB and Micro-B receptacles
respectively.
4.5.5 DIP-type and Midmount-type receptacles
DIP-type (contact and shield tails soldered through PCB) and Midmount-type (connector that
is mounted in a cut-out in the printed circuit board between the top and bottom surfaces)
receptacle connectors are not defined in this standards document. These mounting styles are
allowed under the standard as long as all intermating conditions are met. Mechanical
dimensions and mechanical durability values may vary from the Surface mount standard
connector but must comply with all minimum values.
4.5.6 Connector Keying
This Micro connector series has been designed so as to prevent the Micro-A and Micro-B
plugs from being incorrectly inserted into a receptacle. The amount of metal blocking various
possible incorrect insertions is shown in Figure 4-13 and Figure 4-14, and is always greater
than 0.35 mm.
4.5.7 Right Angle Plugs
The overmolds for right / down angle plugs are required to comply with the same shape
constraints that apply to straight plugs. Reference drawings for right / down angle plugs are
shown in Figure 4-15, Figure 4-16, Figure 4-17 and Figure 4-18.

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© USB-IF 2014
4.5.8 Adapters
Requirements:
• The propagation delay of the adapter shall be less than 1 ns.
• The physical length shall not exceed 150 mm.
• The resistance of the adapter through VBUS and GND, including contacts, shall not exceed
70 mΩ.
4.5.8.1 Standard-A receptacle to Micro-A plug
This adapter is used to connect a cable with a Standard-A plug to an On-The-Go device that
has a Micro-AB receptacle. A reference drawing for this adapter is shown in Figure 4-19
(Figure 4-18).
© USB-IF 2014
4.6 Drawings
This section contains the mechanical drawings that are referenced in the previous section.
IEC
Figure 4-1 – Micro-A to Micro-B Cable

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© USB-IF 2014
IEC
Figure 4-2 – Standard-A to Micro-B Cable

© USB-IF 2014
IEC
Figure 4-3 – Micro-A to Captive Cable

– 20 – IEC 62680-2-2:2015 © IEC 2015
© USB-IF 2014
IEC
Figure 4-4 – Micro-A Plug Overmold, Straight

© USB-IF 2014
IEC
Figure 4-5 – Micro-B Plug Overmold, Straight

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© USB-IF 2014
IEC
Figure 4-6 – Micro-A Plug Interface

© USB-IF 2014
IEC
Figure 4-7 – Micro-B Plug Interface

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© USB-IF 2014
IEC
Figure 4-8 – Micro-A/B Plug Interface (Cut-section)

© USB-IF 2014
IEC
Figure 4-9 – Micro-AB receptacle interface

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© USB-IF 2014
IEC
Figure 4-10 – Micro-B receptacle interface

© USB-IF 2014
IEC
Figure 4-11 – Micro-AB Receptacle Design

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© USB-IF 2014
IEC
Figure 4-12 – Micro-B Receptacle Design

© USB-IF 2014
IEC
Figure 4-13 – Micro-A Plug Blockage

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