笔记本电脑主板上的晶振出了问题，会对电脑带来什么影响？

时间： 2023-11-25 来源：应达利

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电脑主板上晶振的主要作用是为了产生时钟频率，这个原始的时钟频率经过频率放大器的放大或缩小后就成了电脑中各个总线的频率。以声卡为例，要实现对模拟信号44.1kHz或48kHz的采样，频率发生器就必须提供一个44.1kHz或48kHz的时钟频率。如果需要对这两种音频同时支持的话，声卡就需要有两颗晶振。主板上的晶振还有个作用是在电路产生振荡电流，发出时钟信号。

主板晶振非常重要，主板的晶振坏了，通常表现为不能开机、启动显示器无反映、黑屏、开机后关机等故障。

通常电脑主板上用到的晶振有以下几种

32.768kHz晶振：主要用于实时时钟（RTC）模块，用于计算机系统的时间管理。推荐选用应达利的SMLF-3215系列（料号：9CAA32768122TF70QT），SMLF-1610（32.768KHz）等低频音叉晶体。

12MHz晶振，现在的部分主板上出现了12M的晶振，这款晶振主要用于USB接口。若有损坏，则可能导致USB接口失灵等问题。

14.318MHz时钟晶振，用于时钟芯片。14.318MHz晶振不起振，会影响主板上电后全板无复位。起振波形不正常，还有可能导致主机开机不稳定的现象发生。

24.576MHz音频晶振，与声卡芯片相连。晶振不起振可能会出现无音频信号，抓不住声卡等问题。

25MHz晶振，与网卡芯片相连，晶振不起振会影响不上电，或上电后断电或不开机现象，单边起振也出现上电后断电现象。而用于网卡芯片时，不起振则会抓不到网卡，频率异常会出现不连网或网灯不亮等现象。

27MHz晶振，为BGA内部VGA部分提供相关工作时钟，27M晶振不起振则会影响VGA无显示。

9CAA32768122TF70QT产品图

石英晶振能够提供稳定输出是一项十分重要的要求。9CAA32768122TF70QT系列为表贴音叉晶体谐振器，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，还可广泛应用于安防行业、汽车电子、工业应用、通讯应用、消费电子、医疗应用等。

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本文由Lonely转载自应达利，原文标题为:【应用】笔记本电脑主板上的晶振出了问题，会对电脑带来什么影响？，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。

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16MHz有源车规级晶振2651-16005-BV，采用2520封装，工作温度-40~+125℃

应达利（Interquip）推出的有源车规振荡器SPXO-2520系列中2651-16005-BV这颗料，频率为16MHz，总频差±50PPM，支持2520超小超薄封装尺寸和1.8-3.3V宽工作电压范围，符合行业AEC-Q200车规级认证，高精度、低抖动，为汽车电子提供精准的时钟频率，保证数据传输稳定性，满足HUB抬头显示的应用需求。

应用方案发布时间 : 2024-08-01