Product Data Sheet
EX-380 Series
4 Pin D
IP & SMD Evacuated Miniature Crystal Oscillator
EMXOTM
Features
Supply Voltage: 3.3 Vdc or 5 Vdc
Aging: <1x10
-9
/day, <1x10
-7
/year (@ 10 MHz)
Temperature Stability: to 7.5x10
-8
over -20C to +70C
Acceleration Sensitivity: 1 x10
-9
/g, Total Gamma
Uses SC Family 3rd Overtone Crystal
Low Power Consumption: <0.35 watts @ +25C
Frequencies: 10 to 80 MHz
for HCMOS or Sinewave outputs
Fast Warm-up: 1 to 2 minutes
Patented Technique*
Applications
SONET/SDH, DWDM, FDM, ATM, 3G
Telecom Transmission and Switching Equipment
Wireless Communication Equipment
Military Airborne and Mobile systems
Description
The model EX-380
Series is a low profile DIP or SMD, Evacuated
Miniature Oven Controlled Crystal Oscillator (EMXO)
,
available in frequencies from 10 MHz to 80 MHz.
The EX-380
Series provides exceptionally low aging rates and high
temperature stabilities in an extremely small package over a
wide range of environmental conditions. The through hole
unit measures only 20.8mm x 13.2mm x 7.6mm (0.82" x
0.52" x 0.30"), @ 10 MHz provides aging rates of <1x10-
9/day average, <1x10
-7
for the first year and <1x10
-6
for 10
years with temperature stabilities to 1x10
-7
over -40C to
+85C. Wider temperature ranges are available from -55C to
+85C. This is achieved by the application of new resonator
design concepts and technological breakthroughs. This
series of EMXO's bridges the gap between current large,
high precision OCXO's and smaller TCXO'S. The EX-380
Series becomes the most economical choice where there is
a need for spectral purity, short and long term stability, along
with small size and dramatically reduced power consumption.
Standard supply voltages for the EX-380 series are 3.3 Vdc
and 5Vdc,
with HCMOS
or Sinewave output options. A surface mount
version of this oscillator is available (EX-381/5). Sinewave
output is only available in the surface mount, EX-381, version.
Notes: 1. We acknowledge the support
of the U.S. Army for work on resonators
associated with this product under
contract #1 X66001 - 97-C-8635.
*U.S. Patent 5,917,272.
EX-38
0 Evacuated Miniature Oven Controlled Crystal Oscillator
Performance Characteristics for frequencies in the range 10 to 20.48 MHz
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
2
Available Frequencies
10 to 20.48 MHz (See Page 6 for specific Freq's)
Size See page 4 for outline Drawings and Dimensions
Supply Voltage
(C) 5.0 Vdc 5%
(D) 3.3 Vdc 5%
Supply Current (Steady State)
< 70 mA @ +25C and 5 Vdc , <90 mA @+25C and 3.3Vdc
<120 mA @ -40C and 5 Vdc
, <150 mA @-40C and 3.3Vdc
Turn-on current 300 mA maximum @ 5.0 Vdc
, 450 mA maximum @ 3.3V
Output Type
(A) HCM0S,
(G or H)
Sinewave into 50 ohms
Levels (A) <0.4 Volts, >0.9 Vdd, (G) 0 dBm, (H) +3 dBm
Symmetry (at 50% Vdd) (A) 50/50 10%
Rise/Fall Time (10%-90%) (A) <7 ns
Stability vs. Temperature D-
107 = 0.1 ppm over -20C to +70C
D-ST3 = Stratum 3 over -20C to +70C
F-ST3 = Stratum 3 over -40C to +85C
F-107 = 0.1 ppm over -40C to +85C
x-ST3 = Stratum 3 Holdover stability per GR-1244-CORE
280 ppm pk-pk over temperature, < 40 ppb drift.
Aging <1 x 10
-9
/day average, <1 x 10
-7
/
year,
(10 MHz Typical) <1 x 10
-6
/10 years
Short
-Term Stability (Allan Deviation) <5 x 10
-10
, 0.1 seconds to 10 seconds
Phase
Noise (Static Conditions) Offset PhaseNoise
10 Hz -100 dBc/Hz
100 Hz -130 dBc/Hz
1 kHz
-140 dBc/Hz
10 kHz
-145 dBc/Hz
100 kHz
-150 dBc/Hz
Frequency vs. Supply
<2.5 x 10
-9
per percent change
Warm-up (Restabilization)
Standard
Optional
(consult factory)
(frequency relative to that 1 hour after turn-on,
< 1 x 10
-6
60 seconds
45 seconds
following 24 hours off time, at +25C)
< 1 x 10
-7
120 seconds
90 seconds
Electrical Frequency Adjust
A: >1 ppm range with 0 to Vdd input voltage
Initial Accuracy for Fixed Frequency F:
1 ppm @ +25C
Acceleration Sensitivity
1 x 10
-9
/g Total Gamma, standard
(10 MHz) (5 x 10
-
10
/g available at 10 MHz consult factory)
Parameter
Characteristics
NOTE: Tighter stabilities and
wider temperature ranges
are available, please consult
the factory.
Tighter stabilities and
wider temperature ranges
are available, please consult
the factory.
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
3
EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Performance Characteristics for frequencies in the range 20.5 to 80 MHz
Available Frequencies
20.5 to 80 MHz (See Page 6 for specific Freq's)
Size
See page 4 for outline Drawings and Dimensions
Supply Voltage
(C) 5.0 Vdc 5%
(D) 3.3 Vdc 5%
Supply Current (Steady State)
< 70 mA @ +25C and 5 Vdc, <90 mA @+25C and 3.3Vdc
<120 mA @ -40C and 5 Vdc
, <150 mA @-40C and 3.3Vdc
Turn-on current 300 mA maximum @ 5.0 Vdc
, 450 mA maximum @ 3.3V
Output Type
(A)
HCM0S
,
(G or H)
Sinewave into 50 ohms
Level
s (A)<0.4 Volts, >0.9 Vdd (G) 0 dBm, (H) +3 dBm
Symmetry (at 50% Vdd)
(A) 50/50 10%
Rise/Fall Time (10-90%)
(A) <5 ns
Stability vs. Temperature
D-ST3 = Stratum 3 over -20C to +70C
D-107 = 0.1 ppm
F-507 = 0.5 ppm over -40C to +85C
over -
20C to +70C (< 50 MHz)
280 ppm pk-pk over temperature, <40 ppb drift.
Aging
(38.88 MHz Typical) <3 x 10
-9
/day average, <3 x 10
-7
/
year,
<3 x 10-6 /10 years
Short Term Stability (Allan Deviation)
<5 x 10
-10
, 0.1 seconds to 10 seconds
Phase
Noise (Static Conditions) Offset Phase
Noise
10 Hz -80 dBc/Hz
100 Hz -110 dBc/Hz
1 kHz -130 dBc/Hz
10 kHz
-135 dBc/Hz
100 kHz
-140 dBc/Hz
Frequency vs. Supply
<2.5 x 10
-9
per percent change
Warm-up (Restabilization)
Standard
Optional
(consult factory)
(frequency relative to that 1 hour after turn-on,
< 1 x 10
-6
60 seconds
45 seconds
following 24 hours off time, at +25C) < 1 x 10
-7
120 seconds 90 seconds
Electrical Frequency Adjust A:
>3 ppm range with 0 to Vdd input voltage
Initial Accuracy for Fixed Frequency F:
1.5 ppm @ +25C
Acceleration Sensitivity
1 x 10
-9
/g Total Gamma, standard
Parameter
Characteristics
NOTE: Tighter stabilities and wider
temperature ranges are available,
F-147 = 0.14 ppm over -40C to +85C (<50 MHz)
please consult the factor
y. x-ST3 = Stratum 3 Holdover stability per GR-1244-CORE.
4
EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
Outline Drawing
7.62 MAX
(.30 MAX)
0.457 DIA
(.018 DIA)
Square Corner Pin 1
5.08 MIN
(.20 MIN)
CL
7.63
(.30)
15.24
(.60)
2.54
(.10)
1
7
8
14
3.81
(.15)
13.21
(.52)
20.83
(.82)
Marking
Standoff's
3 places at
pins.
Gnd Pin
No Standoff
0.635 MAX
(.025 MAX)
4 PLACES
(
0.35" :385, 0.4": 381)
2.54
(.100)
15.24
(.600)
2.54
(.100)
1.016 DIA
(.040 DIA)
1.727
(.068)
20.32
(.80)
1
2
3
4
Marki
ng
Square Corner Pin 1
12.70
(.50)
Pin
Function
1
Frequency Adjust
*
7
GND, Case
8
Output
14
Supply
Pin Numbers
do not appear on the unit.
* Pin 1 is the Oven Alarm with option G.
380 Package
Pin
Function
1
Frequency Adjust
*
2
GND, Case
3
Output
4
Supply
Pin Numbers
do not appear on the unit.
* Pin 1 is the Oven Alarm with option G.
3
81(ht= 0.4") ,385 (ht=0.35") Package
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.
@ 140C to 160C
reflow
40 to 60 sec.
@ >183C
Te
m
p
e
r
atur
e (
C
)
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
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