随着高科技和高技术的快速发展，晶振成为了电子元器件中必不可缺少的部分，同时晶振在各个领域当中，也迎来了许多的机会，随着我们对于晶振产品的重视，也开始慢慢细致了解其的构成部分，SMD晶振普遍由石英材质或者陶瓷材质加上内部的晶片组合而成，而晶振的频率大小取决于晶片的厚度影响。环保型的石英晶体谐振器旨在持续创新Q22FA2380026400

首先，在制作工艺来讲，晶片大小以及晶片厚薄与晶振的频率密切相关，相对来说，石英晶振的频率越高，需要的石英晶片越薄。比如40MHz的石英晶体所需的晶片厚度是41.75微米，这样的厚度還算可以做到，但100MHz的石英晶体，所需的晶片厚度则是16.7微米。即使厚度可做到但损耗非常高，制作出来的成品轻轻一跌晶片就碎裂。所以一般在高频的晶体就要采用三次泛音、五次泛音、七次泛音的技术来达到了。

Product Number	LxWxH	进口晶振型号	Frequency	CL Value	Freq.tol. @+25°C	Freq.tol./Temp.range	Temperature range
Q22FA2380016500	3.2 x 2.5 x 0.7mm	FA-238	25.000000 MHz	12 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380017000	3.2 x 2.5 x 0.7mm	FA-238	20.000000 MHz	20 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380017900	3.2 x 2.5 x 0.7mm	FA-238	16.000000 MHz	12.5 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380019000	3.2 x 2.5 x 0.7mm	FA-238	24.576000 MHz	8 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380019800	3.2 x 2.5 x 0.7mm	FA-238	24.576000 MHz	7 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380020500	3.2 x 2.5 x 0.7mm	FA-238	19.200000 MHz	10 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380021600	3.2 x 2.5 x 0.7mm	FA-238	16.000000 MHz	12 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380023800	3.2 x 2.5 x 0.7mm	FA-238	24.000000 MHz	20 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380024000	3.2 x 2.5 x 0.7mm	FA-238	24.000000 MHz	30 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380024400	3.2 x 2.5 x 0.7mm	FA-238	48.000000 MHz	20 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380024500	3.2 x 2.5 x 0.7mm	FA-238	24.000000 MHz	30 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380025100	3.2 x 2.5 x 0.7mm	FA-238	36.864000 MHz	8 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380026300	3.2 x 2.5 x 0.7mm	FA-238	16.000000 MHz	9 pF	+/-15 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380026400	3.2 x 2.5 x 0.7mm	FA-238	20.000000 MHz	10 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380026900	3.2 x 2.5 x 0.7mm	FA-238	27.000000 MHz	9 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380029100	3.2 x 2.5 x 0.7mm	FA-238	27.000000 MHz	7 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380030500	3.2 x 2.5 x 0.7mm	FA-238	24.576000 MHz	16 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380031200	3.2 x 2.5 x 0.7mm	FA-238	28.636360 MHz	16 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380032200	3.2 x 2.5 x 0.7mm	FA-238	20.000000 MHz	12.5 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380032900	3.2 x 2.5 x 0.7mm	FA-238	32.000000 MHz	18 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380033800	3.2 x 2.5 x 0.7mm	FA-238	24.000000 MHz	18 pF	+/-15 ppm	+/-30 ppm	-20 to +70 °C

比如基频为20MHz的晶体，五次泛音之后就可以得到100MHz的晶体。一般以经验来讲，40MHz以下基本都是基频晶振，而40MHz以上，则是泛音晶振了。因此，我们不难理解，为什么很多有源晶振频率基本都算高频的，并且成本也相对比较贵，有源晶振的成本除了内部晶片较薄以外，再就是自身有加一个振荡片。环保型的石英晶体谐振器旨在持续创新Q22FA2380026400

Product Number	LxWxH	进口晶振型号	Frequency	CL Value	Freq.tol. @+25°C	Freq.tol./Temp.range	Temperature range
Q22FA2380035000	3.2 x 2.5 x 0.7mm	FA-238	20.000000 MHz	16 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380035300	3.2 x 2.5 x 0.7mm	FA-238	33.330000 MHz	12 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380035500	3.2 x 2.5 x 0.7mm	FA-238	27.000000 MHz	7 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380035600	3.2 x 2.5 x 0.7mm	FA-238	45.000000 MHz	12 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380036400	3.2 x 2.5 x 0.7mm	FA-238	48.000000 MHz	7 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380036700	3.2 x 2.5 x 0.7mm	FA-238	16.000000 MHz	18 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380040500	3.2 x 2.5 x 0.7mm	FA-238	40.000000 MHz	10 pF	+/-50 ppm	+/-50 ppm	-20 to +70 °C
Q22FA2380041500	3.2 x 2.5 x 0.7mm	FA-238	27.120000 MHz	12 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380041900	3.2 x 2.5 x 0.7mm	FA-238	40.000000 MHz	7 pF	+/-50 ppm	+/-50 ppm	-20 to +70 °C
Q22FA2380042100	3.2 x 2.5 x 0.7mm	FA-238	16.000000 MHz	10 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380042300	3.2 x 2.5 x 0.7mm	FA-238	30.000000 MHz	18 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380043200	3.2 x 2.5 x 0.7mm	FA-238	50.000000 MHz	10 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380044700	3.2 x 2.5 x 0.7mm	FA-238	48.000000 MHz	10 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380044800	3.2 x 2.5 x 0.7mm	FA-238	50.000000 MHz	7 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380045800	3.2 x 2.5 x 0.7mm	FA-238	16.384000 MHz	10 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380046400	3.2 x 2.5 x 0.7mm	FA-238	33.333000 MHz	10 pF	+/-50 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380047800	3.2 x 2.5 x 0.7mm	FA-238	25.000000 MHz	18 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380048000	3.2 x 2.5 x 0.7mm	FA-238	27.000000 MHz	10 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C
Q22FA2380048300	3.2 x 2.5 x 0.7mm	FA-238	16.000000 MHz	10 pF	+/-20 ppm	+/-30 ppm	-40 to +85 °C
Q22FA2380048900	3.2 x 2.5 x 0.7mm	FA-238	27.000000 MHz	10 pF	+/-20 ppm	+/-30 ppm	-40 to +85 °C
Q22FA2380054700	3.2 x 2.5 x 0.7mm	FA-238	25.000000 MHz	16 pF	+/-30 ppm	+/-30 ppm	-20 to +70 °C

而爱普生公司推出的FA-238晶振是一款耐受极其强的石英晶体谐振器，无源贴片晶振，编码Q22FA2380026400，封装为3.2 × 2.5 × 0.7 mm，频率范围:12mhz ~ 50mhz FA-238 ，泛音顺序:基本音，应用领域:手机，蓝牙，无线局域网，ISM波段收音机，MPU时钟

在精工爱普生，所有的环保举措都是在计划-执行-检查-行动(PDCA)循环，环保型的晶振产品旨在实现连续创新和改进。环境管理系统(EMS)，运作符合iso14001环境管理标准。我们所有主要的制造业和非制造业基地日本及海外，完成了iso14001的收购认证。