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參數(shù)資料
| 型號： | MGQ-460-FREQ-STBY3-TOL2-CL |
| 元件分類： | 晶體 |
| 英文描述： | QUARTZ CRYSTAL RESONATOR, 1 MHz - 1.19 MHz |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 61K |
| 代理商： | MGQ-460-FREQ-STBY3-TOL2-CL |
2
1.2.
SMD Type Quartz Crystal Units
1.2.1
Soldering
(1) For mounting, it is recommended to solder at less than 230
°C for 20 seconds or less. An example of
the infrared ray reflow temperature profile is shown as follows (see Figure 8).
2.
Cleaning
(1) Since low or intermediate frequency crystal units (VT ,VTC, and MGQ) or oscillators use a small, thin crystal
chip and the frequency approximates the frequency of an ultrasonic cleaner, the crystal chip may break
easily. Therefore, DO NOT perform ultrasonic cleaning.
(2) Other crystal units may also break depending upon the ultrasonic cleaning condition. Please check the
ultrasonic cleaning condition.
3.
Mechanical Shock
(1) The quartz crystal units are designed to withstand a drop from a height of 75 cm onto a hard wooden board
at least three times. However, the crystal chip may break if dropped, depending upon the how they are
dropped. Ensure that the crystal unit functions normally, if the crystal units have been dropped or subjected
to an excessive mechanical shock.
(2) Unlike chip parts for resistors, and capacitors, the crystal unit has a crystal chip which is hermetically sealed
inside. Before using the crystal units, check the influence of shock caused during automatic mounting.
Example of SMD product soldering conditions
(reflow conditions)
250
200
150
100
50
0
30
60
90
120
Figure 8
Time(sec)
Temperature(
°C)
150
°C
230
°C
Note:The temperature is the PCB surface temperature.
30~40sec
15~20sec
+0
-10
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