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謝謝！

你的制作依據(jù)是USB協(xié)會規(guī)范�？梢詤⒄誙L2725、2835、20276等

0USB2.0測試規(guī)格.pdfUSB2.0測試標(biāo)準(zhǔn)

我那有個USB2.0的行業(yè)標(biāo)準(zhǔn),不知是否對你有幫助

文件太大,上傳不了,郁悶

有MICRO-USB資料嗎?

看不到

大家好.

請問有誰知道USB協(xié)會的聯(lián)系方式?

直接上USB協(xié)會網(wǎng)站www.usb.org ,國內(nèi)如果要搞USB認(rèn)證直接找臺灣ETC,我去年剛搞過

USB2.0的電線結(jié)構(gòu)和傳輸特性的標(biāo)準(zhǔn)是在USB2.0規(guī)范上的,但在USB2.0的規(guī)范上并沒有規(guī)定符合那個安規(guī),一般情況下我們是依UL規(guī)范做的,因?yàn)閁SB2,0的結(jié)構(gòu)按UL758標(biāo)準(zhǔn)對號入座的話有2725,20276,20379等等很多,有的廠家還用2835,所以這個并沒有定論,要看你客戶的要求了.

look

就是2樓回答的

USB2.0 的標(biāo)準(zhǔn)是要求TYPE CM（UL444) 的。 協(xié)會認(rèn)証好象也接受2725。

UNDERWRITERS LABORATORIES INC.              APPLIANCE WIRING MATERIAL

Subj. 758     Section 2     Page 2725        Issued:  1975-05-02

                                Revised:  2003-04-04

 

Style 2725    Electronic Cable.

______________________________________________________________________________

 

Rating     60°C or 80°C, 30 V.

______________________________________________________________________________

 

Insulated     Labeled or Complies with manufacturer's AWM Procedure.

Singles       May include mixed sizes.

______________________________________________________________________________

 

Conductor     Two, three, or four parallel, or two or more Assembly

           twisted insulated singles or groups of twisted singles

           twisted together or groups of twisted singles may be laid

           parallel to form flat or oval cable.  Lay not specified

           barrier layer and/or fillers optional.  Manufacturer shall

           maintain a complete description of each assembly.  Diameter

           of assembly under jacket one inch maximum.

______________________________________________________________________________

 

Shield     Optional.

______________________________________________________________________________

 

Jacket     PVC, Class 43, 9 mils minimum average, 7 mils minimum at

           any point.

______________________________________________________________________________

 

Standard      Appliance Wiring Material UL 758.

______________________________________________________________________________

 

Instructions  Detailed Examination.

to UL

Representative

______________________________________________________________________________

 

UL         (4)  Detailed Examination.

Counter-Check (4)  Flexing.

*Program      (12) Horizontal Flame Test.

______________________________________________________________________________

 

Marking       General.

______________________________________________________________________________

 

Use        Internal wiring of electronic equipment in Class 2 systems

           only.

UNDERWRITERS LABORATORIES INC.                     APPLIANCE WIRING MATERIAL

Subj. 758        Section 2        Page 2835        Issued:  1976-10-28

                                                  Revised:  2003-01-03

 

Style 2835	PVC Jacketed Cable.
Rating	60°C, 30 V.
Conductor	40 AWG minimum.  Material not specified.
Insulated Singles	Material not specified for use statement 1A or 1B.  Labeled or complies with manufacturer's Procedure for use statement 2A or 2B.
Assembly	Consists of two or more conductors, twisted pairs, or groups of twisted conductors.  The conductors may be laid parallel or twisted together to form a flat, oval, or round cable construction.  Lay not specified.  Barrier layer and/or fillers optional. May use same or mixed AWG sizes.  Manufacturer shall maintain a complete description of each assembly.
Covering	Optional.  PVC, 5 mils minimum at any point, over the assembly or groups of singles.
Shield	Optional.  May be over one or more of the  insulated conductors or applied over the assembly.
Jacket                 * *	PVC - Class 43.   If parallel construction is rippable, the measurements are made after ripping.     Dia# of Cable   under Jacket               Minimum        Minimum    in inches              Average (mils)  at any point   0.250 or less (1A,2A only)      15             13 0.250 or less (1B,2B only)      30             27 0.251 - 0.424                   30             27 0.425 - 0.700                   60             48 0.701 - 1.500                   80             64 1.501 - 2.500                  110             88 2.501 or larger                140            112   # = Major diameter if flat or oval construction.

                            (Continued on Page 2835A)

 

 

UNDERWRITERS LABORATORIES INC.                      APPLIANCE WIRING MATERIAL

Subj. 758        Section 2        Page 2835A        Issued:  1976-10-28

                                                   Revised:  2003-01-03

 

Standard	Appliance Wiring Material UL 758.
Instructions to UL Representative	Detailed Examination.
UL Counter-Check Program	(4)  Detailed Examination. (4)  Flexibility Test. (12) Cable Flame Test on Completed Cable, External Use,      Constructions 1B and 2B. (12) Horizontal Flame Test on Completed Cable Internal      Use, Constructions 1A and 2A.
Marking	General.
Use No. 1A     Use No. 1B         Use No. 2A       Use No. 2B	Internal wiring in Class 2 circuits of electronic equipment where each end is terminated in connectors.            CABLES - using 30 mils or greater jacket thickness only:  External interconnection or internal wiring in Class 2 circuits of electronic equipment where each end is terminated in connectors.   Internal wiring in Class 2 circuits of electronic equipment where not routed along walls, floors, or other abuse areas.            CABLES - using 30 mils or greater jacket thickness only:  External interconnection or internal wiring in Class 2.

 

 

 

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