EMXO-380 Datasheet, PDF (5/6 Pages) Vectron International, Inc – 4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator

EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Recommended Reflow Profile
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-381/5
series has been designed for pick and place reflow soldering. The suggested reflow profile is
shown above. The EX-381/5 may be reflowed one time in the non-inverted state. VI recommends
waiting at least two hours after reflow before measuring the unit.
Handling Precautions
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
Human-Body (HBM)
500
Charged-Device
500
Unit
V min
V min
Vectron International • 267 Lowell Road, Hudson, NH 03051
5
• Tel: 1-88-VECTRON-1 • Web: www.vectron.com