32.768K晶振最初在日本開始它的大量發展，并形成全球之勢。人們利用晶體的獨特物理特性，加工成一個標準的時鐘晶振。從而應用到各種電子行業，給電子行業帶來了一個歷史的變革；隨著人們技術水平的提高，晶振的精度和性能越來越高,體積也越來越小，有很多的IC集成電路公司己將這小小的晶振放在里面，更加的精密度.
日本進口愛普生晶振FC-12M，是一款32.768kHz晶振，小體積尺寸2.0x1.2mm兩腳貼片晶振，石英晶體諧振器，無源晶振，具有超小型，輕薄型，耐熱及耐環境特性，適用于鐘表電子，智能手機，平板電腦，智能門鎖，儀器儀表，汽車電子，醫療設備等，質量穩定，品質優越，深受廣大客戶信賴.
FC-12M無源晶振編碼X1A000021001000是一款32.768k時鐘晶振
| Product Number |
 愛普生晶振
|
 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無源晶振編碼X1A000021001000是一款32.768k時鐘晶振
32.768K是一款實時時鐘晶振，它的作用是可以產生時序電路基準信號。而之所以選用32.768K是因為它是2的15次冪，是因為可以很精確的得到一秒的計時。不僅如此，包括所有的實時時鐘晶振一般都是32.768k或其倍頻。貼片32.768K晶振的負載電容都是12.5pF。常用32.768K時鐘晶振的電子產品有智能手機、智能手表、安防和可穿戴設備等等。也還有很多生活類、工業類電子也會常用到這款頻率的進口晶振.
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