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Q13MC30610004是日本爱普生(EPSON)推出的无源石英晶振,隶属于其经典MC-306封装系列。作为时钟电路的核心频率源器件,该产品专为低功耗、高精度定时场景设计,适配消费电子、工业控制等多领域的定时需求,是RTC(实时时钟)系统的主流配套器件。
该晶振的关键参数直接决定了其应用场景和性能表现,具体解析如下:
32.768kHz是石英晶振的时钟专用频率,核心逻辑在于:32768 = 2¹⁵,经过15级二分频可直接得到1Hz的秒信号——这是时钟电路的核心需求。该频率无需复杂分频电路,能最大程度简化系统设计,同时降低功耗,是几乎所有带计时功能设备的首选频率。
频差是晶振实际频率与标称值的偏差比例,±20ppm的含义是:在25℃(常温)下,实际频率偏差范围为
32.768kHz × 20 × 10⁻⁶ = ±0.65536Hz
该精度可满足绝大多数民用、工业定时场景(如智能手表的时间同步、工业PLC的定时任务),无需额外温补电路即可实现稳定计时,兼顾性能与成本。
无源晶振需外接匹配电容才能稳定振荡,负载电容是晶振两端到地的总电容(含PCB分布电容)。该晶振要求总负载电容为7pF,设计时通常在晶振两脚各并联一个电容(如12pF,需扣除PCB分布电容1-2pF),确保振荡频率精准锁定在32.768kHz。
MC-306是爱普生推出的小型表面贴装(SMD)封装,物理尺寸约为3.2mm×2.5mm×0.8mm(长×宽×高),具有以下核心优势:
Q13MC30610004的特性使其成为以下场景的首选频率源:
总结:Q13MC30610004是一款专为定时场景设计的高性价比无源晶振,以32.768kHz核心频率、±20ppm精度和小型化封装,成为消费电子、工业控制等领域的主流选择,可有效满足各类设备的计时与频率同步需求。
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