（KDS晶振DT-261尺寸图）
关于KDS晶振40.003KHz/60.003KHz/77.503KHz特频音叉圆柱晶振10PF ±20PPM规格参数介绍如下：
- 品牌：KDS晶振
- NOMINAL FREQUENCY标称频率：40.003KHz、60.003KHz、77.503KHz
- TYPE类别：Fundamental基频、Tuning Fork音叉、Crystal圆柱插件式无源晶振
- Size尺寸：2*6mm/3*8mm
- LOADING CAPACITANCE(CL) 负载电容：10PF
- FREQUENCY TOLERANCE调整频差：±20ppm
- DRIVE LEVEL激励功率：1.0 ± 0.2 μW (2.0μW max.)
- SERIES RESISTANCE等效串联电阻：40 kΩ max./Series
- TURNOVER TEMPERATURE拐点温度：+25 ±5 °C
- PARABOLIC COEFFICIENT 频率温度系数：-0.04 ×10^-6 / °C^2 max.
- SHUNT CAPACITANCE静电容：0.75 pF Type
- OPERATING TEMPERATURE RANGE工作温度：-10 ~ +60 °C
- STORAGE TEMPERATURE RANGE存储温度：-20 ~ +70 °C
- INSULATION RESISTANCE绝缘阻抗：500 MΩ min./DC100±15V (Lead to lead, Lead to case)
40.003KHz/60.003KHz/77.503KHz特频音叉圆柱晶振安装说明
Fix the units firmly if laid condition on circuit board is required. Especially under the vibrating condition, insert shock absorber between the unit and circuit board, or fix the unit with elastic glue (silicone applied) onto the board. If soldering the unit at standing condition is required, it is suggested to keep it away from a circuit board more than 2mm.
在电路板上安装时，请将本产品固定牢固。特别是在振动条件下，建议在本产品和电路板之间增加减震材料，或用弹性胶（硅酮）将本产品固定在电路板上。建议与电路板保持2mm以上的距离。
ULTRASONIC WELDING关于超声波焊接的警告
Original characteristics cannot be guaranteed when ultrasonic welding is applied, due to the damage of inside crystal blank by sympathetic vibration, and this may cause no-oscillation of units.
超声波焊接可能引发共振，导致本产品内部石英晶片不同程度损坏，如造成晶振不起振等不良。
