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Reliability

The VMEMxQ qualification tests were performed per MIL-PRF-55310 & the following environmental tests

Table 4. Environmental Compliance

Parameter

Conditions

Mechanical Shock

MIL-STD-202, Method 213, Condition F except 30,000g, 0.1 ms

Mechanical Vibration

MIL-STD-883, Method 2007, Condition C, 100g

Thermal Shock

MIL-STD-202, Method 107, Condition B

Ambient Pressure Operating

MIL-STD-202, Method 105, Condition E

Gross and Fine Leak

MIL-STD-883, Method 1014, Condition A2 & C

Resistance to Solvents

MIL-STD-202, Method 215

Salt Atmosphere

MIL-STD-883, Method 1009, Condition A

Moisture Resistance

MIL-STD-202, Method 106

Low Temperature Storage Life

JESD22-A119, Condition B

Handling Precautions

Table 5. ESD Ratings

Model

Minimum

Human Body Model

2000V

Charged Device Model

500V

Machine Model

200 V

Although ESD protection circuitry has been designed into the the VMEMxQ, 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.

Devices are built using lead free epoxy and can also be subjected to standard lead free IR reflow conditions. Figure 6 shows max

temperatures and lower temperatures can also be used e.g. peak temperature of 220C.

Suggested IR Profile

Figure 6

Table 6. Reflow Profile

Parameter

Symbol

Value

PreHeat Time

Ts-min

Ts-max

t

S

60 sec Min, 260 sec Max

150°C

200°C

Ramp Up

R

UP

3 °C/sec Max

Time Above 217 °C

t

L

60 sec Min, 150 sec Max

Peak Temperature

t

P

255-260°C

Time To Peak Temperature

T

25C to Peak

480 sec Max

Time at Peak Temperature

t

P

20 sec Max

Ramp Down

R

DN

6 °C/sec Max