一文让你掌握晶振性能的关键因素
晶振主要起到为芯片提供精准时钟信号的作用,晶振作为芯片的“心脏”,在振荡电路中起到不可替代的作用。那么晶振的基本参数包括哪些呢?晶振厂商应达利带您一起看看。
图 1
一、晶振可以分为无源晶振和有源晶振,首先是无源晶振(晶体谐振器)的参数:
需求方提出的基本参数要求:
●标称频率:Frequency
●负载电容:CL
●等效阻抗:Rr(ohms)
●频率温度特性:TC(Relative to 25℃)
●其它要求:工作温度范围、C0、C1等
需要由供方控制的参数:
●频率精度:FL or FR(ppm)
●等效电阻:Rr(ohms)
●静态电容:C0(pF)
●动态电容:C1(fF)
●等效电感:L(mH)
●品质因数:Q(k)
●牵引能力:TS(ppm /pF)
●驱动功率依赖性:DLD
●頻率温度特性:TC(Relative to to 25℃)
二、有源晶振(晶体振荡器)的参数:
●常温频率偏差(Frequency Tolerance)
晶体振荡器(基准条件下)输出频率与标准频率的偏差。如+/-25PPM…
●频率温度偏差(Frequency Stability)
晶体振荡器在工作温度内频率的变化。如+25PPM、+/-30PPM..
●频率总偏差(Overall Stability)
在规定的工作条件范围内允许的频率偏差。频率总偏差包括频率偏差,频率温度偏差,电压频率变化,负载变化,老化等。
频率稳定度要求±20ppm或以上的应用,晶体振荡器;
频率稳定度要求±0.5至±10ppm的应用,TCXO;
频率稳定度要求±1ppm或以下的应用,OCXO。
●电源和负载
晶体振荡器的频率受电源电压变动,和负载变动的影响。
额定的电压有:3.3V+/-10%或5V+/-10%,1.8V+/-5%,2.8V+/5%等,CMOS输出额定的负载为15pF。
●输出波形
晶体振荡器有CMOS、TTL、PECL、LVPECL、LVDS、HCSL
测量仪器包含频率计,示波器等。
应达利电子集团于1995年在深圳成立,专业研发生产销售石英晶体谐振器、振荡器。晶振尺寸小至1.2X1.0mm,频率范围32.768KHz ~200MH,包含无源晶体、热敏晶体、32.768KHz音叉晶体、温补钟振TCXO、压控钟振VCXO、差分振荡器等,广泛应用于5G、智能家居、消费电子、汽车电子(符合AEC-Q200)、通讯产业、医疗电子、安防行业、工业设备等行业。
公司工厂面积超过40,000平米,年产能超过1,000,000,000颗,已通过ISO 9001、IATF 16949、ISO 14001体系认证,拥有超53项发明专利和实用新型专利。产品远销欧美、亚太等地区,销售办事处遍布北京、重庆、苏州、福州、深圳、香港、台湾。
- |
- +1 赞 0
- 收藏
- 评论 0
本文由三年不鸣转载自应达利,原文标题为:【科普】晶振都有哪些参数?一文让你掌握晶振性能的关键因素,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
相关研发服务和供应服务
相关推荐
优质晶振厂家有哪些特点?如何选择晶振厂家?应达利带您详细了解
晶振素来被成为“芯片的心脏”,因而有IC的地方都会有晶振发挥不可或缺的作用。应达利分享应用终端应该如何选择有实力的晶振厂家。
设计经验 发布时间 : 2023-11-01
【经验】新能源汽车充电桩常用的晶振型号和频率有哪些?
应达利专业研发生产销售石英晶体谐振器、振荡器。晶振尺寸小至1.2X1.0mm,频率范围32.768KHz~200MH,包含无源晶体、热敏晶体、32.768KHz音叉晶体、温补钟振TCXO、压控钟振VCXO、差分振荡器等,广泛应用于5G、智能家居、消费电子、汽车电子(符合AEC-Q200)、通讯产业、医疗电子、安防行业、工业设备等行业。
设计经验 发布时间 : 2023-09-26
IoT物联网设备对晶振有哪些要求?一文读懂
根据IoT物联网设备和系统的应用场景和要求,选择合适的晶振类型。本文中应达利将为大家介绍各类IoT物联网设备对晶振的不同要求。
设计经验 发布时间 : 2023-10-31
如何区分有源晶振和无源晶振?
众所周知,电子线路中的晶振分为无源晶振和有源晶振两种类型。本文应达利探讨了如何区分有源晶振和无源晶振。
技术探讨 发布时间 : 2024-06-25
Epson(爱普生)无源晶体/时钟/陀螺仪传感器/有源晶振产品介绍
描述- 本资料对爱普生无源晶体、时钟、陀螺仪传感器、有源晶振等产品进行了介绍。
型号- Q13MC1461000600,TCXO,TG2016,RX8010,RX8130,XV4001,SG-310,RX8026T,X2A000271001200,Q24FA20H00XXXXX,GPM01,SG-3030,FC135,SG3225,FC12M,XV7001,FA-238,X1B000242000100,SG-8018,SG-210STF,X1G005221000800,X1A000061000200,Q22FA23XXXXXXXX,X2A000261000800,GGPM01,X1B000271A00500,X1A000141000300,FA-238A,SG7050,X1E000021048100,Q22FA12800XXXXX,XV-7001BB,TSX-3225,X1E000021016900,X1E000021021800,Q13FC1350000400,XV7011,FA-128,TG-5006,MC146,SG-210,VCXO,VX-7011BB,RX8900,X1B000311000100,X1B000301000200,X1E000021025500,RX8025T,X1A000141000600,RA8900,GGPM01A,X1E0003410XXXXX,Q13MC1462000200,X1B000281000700,Q13FC1350004900
晶科鑫的SMD 1612无源晶振,小米耳机动听音质的秘密配方
无源晶振是电子设备背后默默支撑的英雄。当小米SU7 Ultra以6分46秒的惊人圈速在纽北赛道上震惊世界,当小米15以其超声波指纹识别技术引领智能手机新潮流时,以及小米耳机以其卓越的音质体验赢得用户喜爱时。我们不禁要问:是什么让这些设备如此精准、可靠?答案之一就是无源晶振,尤其是晶科鑫的SMD 1612无源晶振。
应用方案 发布时间 : 2024-11-14
晶光华(JGHC)晶振选型指南(中文)
目录- 石英晶体谐振器 时钟晶振 热敏晶振 普通振荡器(Oscillator) 压控振荡器(VCXO) 温补振荡器(TCXO) 恒温振荡器(OCXO) 32.768KHZ振荡器
型号- MC146,VCXO3225,SMD5032,OCXO1612,SMD2520,SMD3215,M49SSMD,OSC1612,TCXO1612,OCXO2520,2520,Y206,OSC2520,TCXO2520,HC-49SBSMD,VCXO7050,VCXO5032,TCXO5032,GLASS3225,HC-49SSMD,SMD2012,Y308,OSC7050,SMD3225,SMD2016,OSC5032,SMD1612,OSC2016,GLASS5032,TCXO2016,GLASS8045,OSC3225,TCXO3225,OCXO2016,HC-49S
IoT物联网设备常用的晶振解决方案及对晶振的要求
根据IoT物联网设备和系统的应用场景和要求,选择合适的晶振类型。对于需要高精度和高稳定的物联网设备和系统,可以选择石英晶体或晶体振荡器;对于需要低成本的物联网设备和系统,可以选择陶瓷晶振或压电晶体等。
技术探讨 发布时间 : 2024-11-01
星通时频(SCTF)有源晶振选型表
目录- 有源晶振
型号- S7D27.120000D20F30T,S7D3.686400A20F30T,S3D30.000000D20F30T,S5D49.152000A20F30T,S3D49.152000D20F30T,S7D32.000000A20F30T,S7D27.000000B20F30T,S7D16.000000D20F30T,S5D32.000000D20F30T,S3D19.200000A20F30T,S3D50.000000B20F30T,S3D1.843200A20F30T,S7D36.000000B20F30T,S3D11.289600A20F30T,S5D4.096000A20F30T,S7D28.636360D20F30T,S7D11.059200B20F30T,S3D2.048000A20F30T,S5D7.372800D20F30T,S3D6.000000A20F30T,S5D25.000000B20F30T,S7D5.000000D20F30T,S3D4.096000B20F30T,S5D32.768KD20F30T,S5D33.000000D20F30T,S3D12.288000B20F30T,S7D2.000000A20F30T,S3D18.432000A20F30T,S5D29.491200B20F30T,S7D26.000000D20F30T,S7D33.330000B20F30T,S7D54.000000B20F30T,S3D2.457600D20F30T,S5D3.579545B20F30T,S7D4.915200D20F30T,S7D25.000000D20F30T,S5D2.000000D20F30T,S3D48.000000A20F30T,S5D16.000000B20F30T,S3D32.000000B20F30T,S7D8.192000D20F30T,S5D1.000000D20F30T,S5D3.686400B20F30T,S3D32.768KD20F30T,S5D4.000000B20F30T,S5D30.000000A20F30T,S7D4.000000A20F30T,S7D22.118400A20F30T,S3D13.560000A20F30T,S7D45.000000D20F30T,S7D33.333300D20F30T,S3D14.318180B20F30T,S3D22.579200A20F30T,S5D12.288000A20F30T,S7D4.000000D20F30T,S7D1.843200B20F30T,S3D33.000000B20F30T,S7D14.745600B20F30T,S3D48.000000D20F30T,S5D10.000000A20F30T,S5D7.372800B20F30T,S5D26.000000B20F30T,S5D49.1520000B20F30T,S7D54.000000D20F30T,S5D2.000000B20F30T,S7D6.000000D20F30T,S5D24.000000B20F30T,S7D27.000000D20F30T,S7D29.491200B20F30T,S5D22.118400A20F30T,S7D19.200000B20F30T,S3D20.000000A20F30T,S7D14.318180A20F30T,S7D6.144000A20F30T,S5D14.745600B20F30T,S7D8.000000B20F30T,S3D10.000000A20F30T,S3D24.000000B20F30T,S7D1.024000B20F30T,S7D33.000000A20F30T,S3D36.000000A20F30T,S3D4.915200A20F30T,S7D8.192000B20F30T,S7D33.333300B20F30T,S5D4.915200B20F30T,S7D16.000000B20F30T,S5D25.000000D20F30T,S3D2.457600A20F30T,S7D45.000000B20F30T,S3D32.000000D20F30T,S7D1.843200D20F30T,S7D5.000000B20F30T,S5D12.000000A20F30T,S5D50.000000D20F30T,S3D8.000000D20F30T,S3D18.432000D20F30T,S3D20.000000D20F30T,S3D3.579545A20F30T,S7D14.745600D20F30T,S5D1.000000A20F30T,S5D24.000000D20F30T,S7D6.000000B20F30T,S7D49.152000A20F30T,S5D24.576000A20F30T,S5D40.000000A20F30T,S7D16.384000B20F30T,S5D12.288000D20F30T,S7D32.768KB20F30T,S5D27.000000B20F30T,S3D14.318180D20F30T,S7D29.491200D20F30T,S7D8.192000A20F30T,S5D33.333000A20F30T,S3D2.048000D20F30T,S5D3.579545D20F30T,S5D1.000000B20F30T,S5D16.384000B20F30T,S3D26.000000A20F30T,S5D6.000000B20F30T,S3D3.686400B20F30T,S5D2.048000B20F30T,S5D13.560000B20F30T,S5D14.745600D20F30T,S5D11.289600A20F30T,S5D28.636360D20F30T,S3D16.000000B20F30T,S3D25.000000B20F30T,S7D3.686400D20F30T,S5D2.000000A20F30T,S5D19.200000A20F30T,S5D22.579200B20F30T,S7D30.000000A20F30T,S3D11.289600D20F30T,S7D32.768KD20F30T,S5D4.000000D20F30T,S7D4.096000B20F30T,S5D7.372800A20F30T,S5D4.096000D20F30T,S7D5.000000A20F30T,S7D2.457600D20F30T,S7D4.000000B20F30T,S3D33.330000A20F30T,S3D33.333000B20F30T,S5D32.000000A20F30T,S7D50.000000D20F30T,S5D12.288000B20F30T,S3D1.843200D20F30T,S5D36.000000B20F30T,S5D6.144000A20F30T,S3D24.000000D20F30T,S7D11.059200D20F30T,S7D24.576000A20F30T,S3D7.372800B20F30T,S3D33.333000A20F30T,S7D1.000000A20F30T,S3D10.000000B20F30T,S5D24.576000D20F30T,S5D13.560000A20F30T,S5D16.384000A20F30T,S5D2.048000A20F30T,S5D40.000000D20F30T,S5D22.579200A20F30T,S3D27.000000A20F30T,S5D6.144000B20F30T,S3D12.000000A20F30T,S3D14.318180A20F30T,S5D49.1520000D20F30T,S5D6.000000A20F30T,S7D14.745600A20F30T,S7D33.330000A20F30T,S3D22.579200D20F30T,S3D26.000000B20F30T,S5D20.000000D20F30T,S5D24.000000A20F30T,S3D13.560000D20F30T,S5D48.000000A20F30T,S3D7.372800D20F30T,S3D11.059200A20F30T,S7D4.915200B20F30T,S5D32.768KB20F30T,S5D5.000000B20F30T,S3D12.288000D20F30T,S3D27.000000D20F30T,S3D8.192000A20F30T,S3D12.000000B20F30T,S3D10.000000D20F30T,S5D36.000000A20F30T,S5D30.000000B20F30T,S5D8.000000A20F30T,S3D25.000000D20F30T,S5D18.432000B20F30T,S7D40.000000A20F30T,S7D14.318180D20F30T,S7D54.000000A20F30T,S5D19.200000B20F30T,S5D48.000000D20F30T,S3D22.118400A20F30T,S3D49.1520000B20F30T,S7D50.000000A20F30T,S5D8.000000D20F30T,S3D22.118400D20F30T,S7D4.096000A20F30T,S3D29.491200A20F30T,S3D33.333000D20F30T,S5D5.000000D20F30T,S5D18.432000A20F30T,S5D20.000000A20F30T,S5D8.000000B20F30T,S3D16.000000A20F30T,S5D16.384000D20F30T,S5D6.144000D20F30T,S3D33.333300A20F30T,S5D33.000000A20F30T,S5D28.636360B20F30T,S5D32.000000B20F30T,S7D33.330000D20F30T,S3D29.491200B20F30T,S3D3.686400A20F30T,S3D12.000000D20F30T,S7D4.915200A20F30T,S3D22.118400B20F30T,S5D33.000000B20F30T,S5D28.636360A20F30T,S5D6.000000D20F30T,S5D30.000000D20F30T,S7D2.457600B20F30T,S3D1.843200B20F30T,S5D48.000000B20F30T,S3D33.333300B20F30T,S7D2.000000B20F30T,S7D11.289600A20F30T,S7D12.288000B20F30T,S7D50.000000B20F30T,S3D4.915200B20F30T,S3D1.000000A20F30T,S3D6.144000A20F30T,S7D8.000000A20F30T,S7D33.333000D20F30T,S5D19.200000D20F30T,S5D14.745600A20F30T,S3D49.1520000A20F30T,S5D29.491200A20F30T,S3D13.560000B20F30T,S3D16.384000B20F30T,S3D22.579200B20F30T,S3D5.000000B20F30T,S7D2.457600A20F30T,S7D19.660800D20F30T,S7D22.118400B20F30T,S5D33.333000B20F30T,S3D14.745600D20F30T,S5D20.000000B20F30T,S3D26.000000D20F30T,S5D16.000000A20F30T,S7D7.37
应达利标称频率范围16.0~96.0MHzSMCE2016晶振,可完美应用于IoT物联网网关
应达利的晶振SMCE2016系列,SMCE3225系列(料号5YAA08000083TFD0Q3等)通过海康威视IoT物联网网关芯片认证,在-40℃~85℃的温度范围内保持稳定正常的工作,可完美应用于IoT物联网网关。
应用方案 发布时间 : 2024-11-01
应达利(Interquip)石英晶体谐振器/振荡器选型指南(详细版)
目录- COMPANY PROFILE Quartz Crystal Resonators Application introduction SMD Seam Welded Quartz Crystal Resonators with Built-in Thermlstor AT-CUT Quartz Crystal Resonators SMD Ceramic to Metal Quartz Crystal Resonators SMD All Ceramic Quartz Crystal Resonator SMD Seam Welded Quartz Crystal Resonators SMD Tuning Fork Crystal Resonators SMD Voltage Controlled Quartz Crystal Oscillator SMD Temperature Compensated Quartz Crystal Oscillators Ultra-Low Phase Noise Quartz Crystal Oscillators SMD Ceramic Enclosure Quartz Crystal Oscillators Programmable SMD Ceramic Enclosure Quartz Crystal Oscillators
型号- 165-B SERIES,HC-49S SERIES,SMCE-1210,SMCE-1612,THHF-49S3,SMLF-1610,TC900,463-F,168-B SERIES,SMCM-3225H,463-E,168-P SERIES,163-B,163-F,163-E,165-B,SMCE-2016,SMCE-3225,VC800,SMAC-1045H,463-F SERIES,THR-1612,VC800 SERIES,SMAC-7050H,163-P,HC-49S,149-B SERIES,149-F SERIES,THHF-49S2B,THHF-49S2A,TC950 SERIES,SMCM-2016H,SMCE-2520,THR-2016,160-B SERIES,SMLF-3215,163-P SERIES,SMCE-5032,TC800,163-B SERIES,163-E SERIES,163-F SERIES,SMCM-5032H,SMCE-7050,TC800 SERIES,149-B,168-B,SMHF-49C,149-E,SMHF-49B,149-F,SMHF-49D,160-B,SMCE-6035,SMLF-2012,THR-2520,463-E SERIES,TC900 SERIES,TC950,THHF-49S,168-P,149-E SERIES
【选型】晶光华(JGHC)贴片有源晶振 & 贴片无源晶振(物料型号对照表)选型指南
目录- 有源晶振/无源晶振
型号- S3227000121040,49SAC18080162060,S2126000121080,Y20600327122075,49SAC07600202060,S2232000091050JY,O32125000153325,S5325000201040,M49SAT08000201080,SMD2520,S32080001220500,G53080000850100A,GLASS5032,49SAT04000201080JY,O5326000153325,S2100327121090,49ASC28800202040,S3230000201040,49SAC25000182040,S5327000202040,MC30600327122050,S3224000151060,S3228375201060,O7540000153325,S3227000201040,49ASC60350202040,49SAT25000201040JY,S5312000201080,S53080001510100A,S3240000121060,G53080000830100A,OSC2016,49SAC24000201040,49SBT06745201060,O5316000153325,OSC3225,S3224000151050,49SBT12000181060,M49SAT24000121060,O7512000153325,HC-49S,49SAC16000201060,S3224000121060A,O2200327153325,G5308000201080,49SAC035792020100,49ASC27138152040,O7520000153325,S3224000121060,S2224000121060JY,S5313253201060,O3200327151825,49SAT26000201040JY,G3216000183080,SMD3100327122090,S2224000091060JY,G3212288121080,O5300327153325,O5308000153325,49SAC04096202080,HC-49SMD,S2132000101080,O7527000153325,49SAC04194202080,S5312000202080A,O7512288153325,49SAC16934182060,S3212000121080,O22088001533100,49ASC27000182040,49SBT33868201040,O7550000153325,S32300000651040,S2132000121080,S5319687141040A,S3224000061050,49SAC22118202040,49SBT04000201080,S5313560152040A,S3212000201080,S3232000081040,49ASC26000202040,P7426000091040,S712000201040,49SAC08000202060,O7525000153325,O2100327153325,49SAC24000122040,O3225000153325,S3225000121060,49SAT08000201060,S3216000121060,S2240000101050JY,S32120002010100A,O3237125153325,J3224000091080,49SAC26000152040,49SAC16000222060,49SAT13560161050JY,O3216000153325,HC-49SSMD,O7524000153325,TCO22260002805,Y20600327122040,O5340000153325,S2140000091070JY,49SAC25000122040,S2227120101080,G3232000121060A,O3212288153325,49SAC24545082040JY,O3226000153325,S2132000091080,S5340659081540,49SAC10000201060,S2226000071060,S3224000201060,S3213000201060JY,49SAC27000182040,49SAC20000202040,S2219200121080,PFP7040,49ASC50000201040,O5324000153325,S5318080141040A,49SAC036862020100,O3240000153330JY,S3230000201060,49SBT25000181040,TCXO2520,G3226000161060,O3248000153325,S3237400201040JY,S3226000091060,S3219200071060,S3240000121040,S2240000101050,49ASC40233202030,G3224000102060,TSX22260000781040,S5348000202040,OSC7050,SMD3225,SMD2016,O75100000153325,O2224000153325,S3214318201060,S3227000181040,MC14600327122090,49SAC06745202060,S3250000121060,O3240000153325,S3240000101040,O75125000153325,49SAC36480122040,S724000101030,J3225000121080,S2216000091080,O7502048153325,O5324576153325,S22160000910100JY,O5320000153325,M49SAT26000091060,S3232000091040,49SAC10000132060,S3213253202070,S2132000091070JY,49SAC25000201040,S2226000120860,O5312288153325,S3230000101040,SMD3100327092090,O32540001533525,O2227000153325,Y30800327122075,49SAT14318201060,O3204000153325,SMD6035,49SAC08000182060,49SAC20500202040,O3227000153325,O3200327153320JY,49SAC21250182040,S3212000181080,O3233330153325,49SAC260000852040,O5310000153325,S2226000091060JY,O3232000153325,S3226000081040,49ASC27120102040,S720000202040,O3250000153325,O2250000153325,S2126000091080,G5308000123080,S5324000201040,G3232000121050,S2100327072090,O5327000153325,O5312000153325,S5308000201080,S2225000181060,O2220000153325,O3218432153325,O7508000153325,O22072001533100,S3213560201060,S2124000121080JY,O3220000153325,S3216000091060,S3237400121040,49SAC17950162060,OSC2520,49SBT04904201060,49SAC06000202060,49SBT26000151040,49SAC12000202060,S3224000121060JY,O7533000153325,O75125000LD3320,O7511059153325,S3220000181060,O2224576153325,O5325000153325,49SAC08000163060,49ASC32768202030,S3224576202040,S2250000091050,S3225000151040,49SAC08192202060,M49SAT16000091060,O3206000153325,O2212000153325,S32080002010500,O3224576153325,TSX2226000091040,O3212000153325,49SBT24000181040,S2226000081060,S3219200101060,S3226000121060,O5350000153325,49SAT04000201080,SMD5032,S3224576121060,49SAC13560101060,G3225000201060,S5308000222080,S5308704223080,S5313526142040A,S3212000101080,O2225000153325,O2237125153325,S5313526141060,49SAC11059202060,HC-49SBSMD,S3216000091060JY,TSX2226000071040,Y20624000202050JY,M49SAT12000121060,4SSAC27000202040,49SAC04897202080,S3240000091040JY,49SAC13560201060,S3225000201060,TCO22384001805,S6316000202040,49SAC04000202080,49SAC13598102060,M49SAT27000201060,49SAC16934202060,49SAC08000FS2060,S3232000121040,S2132000081070JY,G3236864062050,J3220000181080,O7524576153325,S2125000101080,S21160000910120JY,S3226000071060,S3218080141080A,S3240000151040,M49SSMD,49SAC27000202030JY,G3226000071060,S3240000101060JY,S2216000121080,49SAC16000182060,O3227000153320JY,49ASC27125202040,S3226000091040JY,G3225000101560A,49SAC14745202060,O7548000153325,S5327000181040,O2248000153325,49SAC16000202060,S3227141201060A,S2240000091050JY,O3230000153325,O32100000153325,O7510000153325,O3224000153325,49SAC20480202040,OSC5032,S3216000201060,G3236864062060A,S2126000091080JY,O5348000153325,49SAC25000202040
应达利差分输出振荡器SPXO-3225具备高可靠性、频率范围广的优点,满足数据中心服务器光模块的应用需求
差分输出振荡器SPXO-3225系列为表贴石英晶体振荡器,其尺寸小巧,符合RoHS标准且无铅,具备高可靠性、频率范围广的优质特性,满足数据中心服务器光模块的应用需求。
应用方案 发布时间 : 2024-11-01
电子商城
现货市场
服务
提供CE测试服务,通过晶体回路匹配分析,给出测试报告。支持EPSON所有MHz无源晶体、32.768KHz晶体。支持到场/视频直播测试,资深专家全程指导。
实验室地址: 深圳/上海 提交需求>
可定制卫星定位天线协议:GPS、北斗、伽利略 (Galileo) 、格洛纳斯(GLONASS)卫星定位;增益:5~25dBi;驻波比:≤1.5;接口连接器:IPEX:1~5代IPE、SMA接口/公头等。
最小起订量: 1000 提交需求>
登录 | 立即注册
提交评论