是否提供加工定制是品牌威乐思型号49/s种类晶振标称频率4.000mhz（mhz）调整频差30ppm（mhz）温度频差30ppm（mhz）总频差60ppm（mhz）负载电容20pf（pf）负载谐振电阻120（Ω）激励电平1.0（mw）基准温度25（℃）插入损耗0（db）阻带衰减0（db）输入阻抗15（kΩ）输出阻抗20（kΩ）
electricalspecifications:
item
specification
nominal frequency
4.000mhz
oscillation mode
fund
frequency stability
+/-20ppm
temperaturecharacteriistic
+/-30ppm
operating temperaturerange
-10c to +60c
resonance resistance(r)
120max.
load capacitance(cl)
20 pf
shunt capacitance (co)
7.0 pf max
drive level
500 uw
aging
+/-5.0 ppm/year @25c
insulation resistance
500mmin at dc 100v