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| 型号： | VS-500A155.520 |
| 厂商： | VECTRON INTERNATIONAL |
| 元件分类： | XO, clock |
| 英文描述： | VOLTAGE CONTROLLED CLOCK SAW OSCILLATOR, 155.52 MHz |
| 文件页数： | 6/8页 |
| 文件大小： | 160K |
| 代理商： | VS-500A155.520 |
VS-500A Voltage Controlled SAW Oscillator
Vectron International 166 Glover Avenue, Norwalk, CT 06856 Tel: 1-88-VECTRON-1 Fax: 1-888-FAX-VECTRON
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 sus-
ceptibility 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 resis-
tance = 1.5Kohms and capacitance = 100pF is widely used and therefore can be used for comparison purposes.
Model
Minimum
Human Body Model
1500V
Charged Device Model
1000V
Table 6. ESD Ratings
TIME(s)
TEM
PE
RATURE(°C)
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.
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