项目

Item

规格Specification

1

标称频率

Nominal Frequency

12.000MHz

2

壳   形

Holder T*e

HC-49U/S

3

振动模式

Oscillator Mode

AT基频

4

调整频差(25℃)

Frequency Stability (25℃)

&plu*n;20ppm

5

工作温度范围

Operating Temperature Range

-20℃~ 80℃

6

温度频差

Frequency Stability vs. Temp

&plu*n;30ppm

7

负载电容

Load Capacitance

 20pF&plu*n;0.2pF

8

谐振电阻

Equivalent Series Resistance

 40Ωmax

9

静电容

Shunt Capacitance

7.0pF max

10

激励功率

Drive Level

50μW in standard

11

*缘电阻

Insulation Resistance

500MΩat DC100V

12

年老化率

Aging Rate a Year

&plu*n;3ppm

13

检测仪器

Test Impedance Meter

S&A250B

14

印字形式

Marking

12.000

15

存储温度范围

StorageTemperature Range

-55℃~ 125℃

16

存储湿度范围

StorageHumidity Range

0～95％RH

序号

类别

规  范

检验标准

1

自由跌落

从60cm高度自由跌落到30mm厚硬木板上，跌落三次

△f/f≤&plu*n;5ppm

△R≤20%

2

振动

频率10~55Hz，振幅1.5mm，X、Y、Z方向各振动2小时。

△f/f≤&plu*n;5ppm

△R≤20%

3

引出端强度

a.拉力：固定振荡器主体，沿引脚轴向施加0.9Kg拉力，保持30&plu*n;5秒。

b.弯曲：引脚端头悬挂450g的重物，弯曲90°,时间2~3秒，以相同速度返回原位置，再反向操作。

引脚无拔出或断裂现象

△f/f≤&plu*n;5ppm

△R≤20%

4

密封性

将谐振器浸在酒精中，加压5Kg/cm²，时间五分钟。

测量引脚与基座间*缘电阻>500MΩ（DC100V）

5

可焊性

从引脚末端至底部2~2.5mm放入235℃

&plu*n;5℃的焊槽内,时间2&plu*n;0.5秒。                        

沾锡面>90%，频率变化≤&plu*n;10ppm

6

耐焊接热

从引脚末端至底部2~2.5mm处放入260℃&plu*n;10℃的焊槽内，时间10&plu*n;0.5秒

△f/f≤&plu*n;5ppm

△R≤20%

7

温度循环

将谐振器放置在高低温箱中，将温度设置在-20℃，温度到达后保持30分钟，再将温箱升温到 80℃，保持30分钟，这是一个循环；再将温箱降温到-20℃，开始下一个循环，如此循环三次

△f/f≤&plu*n;5ppm

△R≤20%

8

恒定湿热

在40&plu*n;3℃，90～95% RH，放置96小时，取出后恢复2小时

△f/f≤&plu*n;5ppm

△R≤20%

9

高温老化

85℃&plu*n;2℃老化96小时，取出后常温下恢复2小时

△f/f≤&plu*n;5ppm

△R≤20%

10

耐低温

-40℃&plu*n;2℃放置96小时，取出后常温下恢复2小时

△f/f≤&plu*n;5ppm

△R≤20%

Item

Condition of test

Performance Requirements

Mechanical

Shock

Resonator shall be measured after 3 times random dropping from the height of 60cm onto hard wooden broad of thickness more than 30mm

No visible damage, and measured Values shall meet Table 1

Vibration

Subject resonator to following vibration:

Frequency:：10～55Hz

Amplitude：1.5mm

Duration：3 mutually perpendicular planes in each 2 hours

Direction：X Y and Z axis

No visible damage, and measured Values shall meet Table 1

Terminal Strength

Terminal Pulling

Terminal Bending

Force of 5N is applied to each lead in axial direction for 30&plu*n;5 sec.

When force of 5N is applied to each lead in axial direction, the lead shall folded up 90^ofrom the axial direction and folded back to the axial direction. The speed of folding shall be each 3 seconds.

No visible damage, and measured Values shall meet Table 1

Solder ability

Lead terminals are immersed up to 2mm from Resonator’s body in soldering bath of 235&plu*n;5℃for 2&plu*n;0.5 sec.

More than 95％of the terminal surface of the resonator shall be covered with fresh solder

Resistance to Soldering Heat

Lead terminals are immersed up to 2mm from Resonator’s body in soldering bath of 260&plu*n;10℃for 10&plu*n;0.5 seconds and then resonator shall be measured after being placed in natural conditions for 2 hours.

No visible damage, and measured Values shall meet Table 1

Temperature

Cycling

Subject the resonator to -20℃for 30 min, followed by a high

temperature of 80℃for 30 min. Cycling shall be repeated 5

times. resonator shall be measured after being placed in                  

natural conditions for 2 hours.   

No visible damage, and measured Values shall meet Table 1

Heat Resistance

Subject theresonator to 85℃&plu*n;5℃for 96 hours,

resonator shall be measured after being placed in natural 

conditions for 2 hours.

No visible damage, and measured Values shall meet Table 1

Cold

Resistance

Subject theresonator to -40℃&plu*n;5℃for 96 hours,

resonator shall be measured after being placed in natural

conditions for 2 hours.

No visible damage, and measured Values shall meet Table 1

Humidity

Subject the resonator at 40℃&plu*n;5℃and 90％～95％R.H.for

96 hours, resonator shall be measured after being placed in

natural conditions for 2 hours.   

No visible damage, and measured Values shall meet Table 1