VS-500A VECTRON [Vectron International, Inc], VS-500A Datasheet - Page 6

• Manufacturer Part Number: VS-500A
• Description: Voltage Controlled Saw Oscillator
• Manufacturer: VECTRON [Vectron International, Inc]

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VS-500A Voltage Controlled SAW Oscillator
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.
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.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
Table 6. ESD Ratings
Charged Device Model
Human Body Model
Figure 5. Suggested IR profile
Model
TIME(s)
Minimum
1500V
1000V