32.768K晶振最初在日本开始它的大量发展，并形成全球之势。人们利用晶体的独特物理特性，加工成一个标准的时钟晶振。从而应用到各种电子行业，给电子行业带来了一个历史的变革；随着人们技术水平的提高，晶振的精度和性能越来越高,体积也越来越小，有很多的IC集成电路公司己将这小小的晶振放在里面，更加的精密度.
日本进口爱普生晶振FC-12M，是一款32.768kHz晶振，小体积尺寸2.0x1.2mm两脚贴片晶振，无源晶振，石英晶体谐振器，具有超小型，轻薄型，耐热及耐环境特性，适用于钟表电子，智能手机，平板电脑，智能门锁，仪器仪表，汽车电子，医疗设备等，质量稳定，品质优越，深受广大客户信赖.
FC-12M无源晶振编码X1A000021001000是一款32.768k时钟晶振
| Product Number |
 爱普生晶振
|
 Model
|
 Frequency
|
 CL Value
|
 Freq.tol. @+25°C
|
 Oper. Temper. range
|
| X1A000061000200 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 12.5 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000061000300 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 12.5 pF | +/-30.0 ppm | -40 to +85 °C |
| X1A000061000600 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 7 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000061000800 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 9 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000061001400 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 12.5 pF | +/-10.0 ppm | -40 to +85 °C |
| X1A000061002100 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 6 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000061002400 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 9 pF | +/-10.0 ppm | -40 to +85 °C |
| X1A000061003000 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 8 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000061003200 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 6.6 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000061003500 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 7 pF | +/-10.0 ppm | -40 to +85 °C |
| X1A000021000200 |
 2.05 x 1.2 x 0.6 mm
|
 FC-12M
|
 32.768kHz
|
 10 pF
|
 +/-20.0 ppm
|
 -40 to +85 °C
|
| X1A000021000700 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 10 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000021000800 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 10 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000021001000 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 9 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000021001100 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 10 pF | +/-20.0 ppm | -40 to +85 °C |
| X1A000021001600 | 2.05 x 1.2 x 0.6 mm | FC-12M | 32.768kHz | 7 pF | +/-20.0 ppm | -40 to +85 °C |
FC-12M无源晶振编码X1A000021001000是一款32.768k时钟晶振
32.768K是一款实时时钟晶振，它的作用是可以产生时序电路基准信号。而之所以选用32.768K是因为它是2的15次幂，是因为可以很精确的得到一秒的计时。不仅如此，包括所有的实时时钟晶振一般都是32.768k或其倍频。贴片32.768K晶振的负载电容都是12.5pF。常用32.768K时钟晶振的电子产品有智能手机、智能手表、安防和可穿戴设备等等。也还有很多生活类、工业类电子也会常用到这款频率的进口晶振.
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