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| 型号： | VS-500A-177.7371 |
| 厂商： | VECTRON INTERNATIONAL |
| 元件分类： | Voltage controlled clock SAW oscillator |
| 英文描述： | VOLTAGE CONTROLLED CLOCK SAW OSCILLATOR, 177.7371 MHz |
| 文件页数： | 6/8页 |
| 文件大小： | 106K |
| 代理商： | VS-500A-177.7371 |
VS-500A Voltage Controlled SAW Oscillator
Vectron International 166 Glover Avenue, Norwalk CT 06856-5160
Tel:1-88-VECTRON-1
e-mail vectron@vectron.com
6
Handling Precautions
Although ESD protection circuitry has been designed into the the VS-500A proper precautions should be
taken when handling and mounting. VI employs a human body model and a charged-device model (CDM)
for ESD susceptibility testing and design protection evaluation. ESD thresholds are dependent on the
circuit parameters used to define the model. Although no industry wide standard has been adopted for the
CDM, a standard HBM of resistance = 1.5Kohms and capacitance = 100pF is widely used and therefore
can be used for comparison purposes.
Table 6. ESD Ratings
Model
Minimum
Human Body Model
1500V
Charged Device Model
1000V
Figure 5. Suggested IR profile
VI qualification includes aging at various extreme temperatures, shock and vibration, temperature cycling
and IR reflow simulation. The conditions a device can withstand are well understood and devices can be
subjected to the profile in figure 5. This profile shows a ramp up condition to prevent thermal shock, a
preheat period in which the flux is activated, a ramp up to 183
°C which is the reflow temperature of Sn/Pb
eutectic and a gradual cool down. The time above 183
°C should not exceed 60 seconds and the peak
temperature should be no more than 220
°C for 10 seconds. The VS-500A’s are 100% screened for
hermiticity so an aqueous wash is not an issue.
TIME(s)
TEM
P
E
R
ATURE(°C)
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