EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator

5

Vectron International •

267 Lowell Road, Hudson, NH 03051

• Tel: 1-88-VECTRON-1 • Web: www.vectron.com

Recommended Reflow Profile

Handling Precautions

pre-heating

60 to 90 sec.

@ 140ºC to 160ºC

reflow

40 to 60 sec.

@ >183ºC

Note: EMXO's are precision subsystems with tolerances measured to ±0.001 ppm. The EX-38

1/5

series has been designed for pick and place reflow soldering. The suggested reflow profile is

shown above. The EX-38

1/5 may be reflowed one time in the non-inverted state. VI recommends

waiting at least two hours after reflow before measuring the unit.

Although protection circuitry has been designed into

this device, proper precautions should be taken to

avoid exposure to electrostatic discharge (ESD) dur-

ing handling and mounting. VI employs a human-body

model (HBM) and a charged-device model (CDM) for

ESD-susceptibility testing and protection design evalu-

ation. ESD voltage thresholds are dependent on the

circuit parameters used to define the mode. Although

no industry-wide standard has been adopted for the

CDM, a standard HBM (resistance = 1500 ohms,

capacitance = 100pf) is widely used and therefore can

be used for comparison purposes. The HBM ESD

threshold presented here was obtained by using these

circuit parameters.

ESD Threshold Voltage

Model

Threshold

Unit

Human-Body (HBM)

500

V min

Charged-Device

500

V min