USB测试标准.doc

电子发烧友 电子技术论坛以下为USB测试标准，参考标准为USB Specification Revision 2.0USBElectrical,Mechanical,and Environmental Compliance StandardsTest DescriptioPerformance RequirementVisual and Dimensional InspectionMust meet or exceed the requirements specified by the most current version of Chapter 6 of the USB Specification.Insulation Resistance绝缘电阻大于等于1，000Dielectric Withstanding Voltage耐电压The dielectric must withstand 500V AC for one minute at sea level.500VAC，一分钟Low Level Contact Resistance 低电平接触电阻30 m maximum when measured at 20mV maximum open circuit at 100mA.Mated test contacts must be in a connector housing.在开路最大电流为100 mA电压为20mV情况下最大为30mContact Current Rating温升1.5A at 250V AC minimum when measured at an ambient temperature of 25.with power applied to the contacts ,the T must not exceed +30at any point in the USB connector under test.相对温度为25，250VAC，最小为1.5A。接通电压，测试中端子任一点的温度不超过30。Contact Capacitance接触电容2 pF maximum unmated per contact.最大为2pFInsertion Force插入力35 N maximum at a maximum rate of 12.5 per minute在插入速度不超过每分钟12.5时不超过35NExtraction Force 拨出力10 N minimum at a maximum rate of 12.5 per minute在拔出速度不超过每分钟12.5时不超过10NDurability 耐用性1,500 insertion/extraction cycles at a maximum rate of 200 cycles per hour.在速度不超过每小时200个循环下经受1，500次插入与拨出。Cable Pull-Out电缆拉出After the application of a steady state axial load of 40 N for one minute固定后施加40N的轴向力,一分钟。Test DescriptioPerformance RequirementPhysical Shock物理冲击No discontinuities of 1s,or longer duration when mated USB connectors are subjected to 11ms duration 30 Gs half-sine shock pulses.Three shocks in each direction applied along three mutually perpendicular planes for a total of 18 shocks.匹配USB端子，中断不得大于或等于1s,30Gs的半波脉冲承受11ms.从三个正交的方向施加冲击，总冲击数为18次 Random vibration任意振动No discontinuities of 1s,or longer duration when mated USB connectors are subjected to 5.35GsRMS.15minutes in each of three mutually perpendicular planes匹配USB端子，中断不得大于或等于1s,承受5.35GsRMS.朝各个正交的方向各振动15分钟。Thermal Shock热冲击10 cycles -55 and 85.The USB connectors under test must be mated.在-55至85中循环10次，端子必须紧密配合。Cable impedance阻抗Impedance must be in the range specifiedin Z0=9015%;ZCM=3030%Signal Pair Attenuation衰减Refer to Section 7.1.17 Frequency att(max)0.064 0.080.256 0.110.512 0.130.772 0.151 0.24 0.398 0.5412 0.6724 0.9548 1.35961.9200 3.24005.8Test DescriptioPerformance RequirementPropagation Delay传输延迟See Section ,Section 7.1.4,Section 7.1.16, and Table 7-95.2ns/m MAXPropagation Delay Skew延迟偏移Propagation skew must met the requirements as listed in Section 7.1.3 最大不超过100ps/cableSolderability可焊性USB contact solder tails must pass 95% coverage after one hour steam aging as specified in Category 2在经过一个小时的蒸气老化后焊接端的覆盖率大于95%。Humidity 抗潮性168 hours minimum.The USB connectors under test must be tested in accordance with EIA 364-31.大于168个小时。如EIA364-31测试Flammability The manufacturer will require its thermoplastic resi