Product Data Sheet
EX-380 Series
4 Pin DIP
& SMD
Evacuated Miniature Crystal Oscillator
EMXO™
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 -20°C to +70°C
• Acceleration Sensitivity: 1 x10
-9
/g, Total Gamma
• Uses SC Family 3rd Overtone Crystal
• Low Power Consumption: <0.35 watts @ +25°C
• 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 -40°C to
+85°C. Wider temperature ranges are available from -55°C to
+85°C. 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-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Performance Characteristics for frequencies in the range 10 to 20.48 MHz
Parameter
Available Frequencies
Size
Supply Voltage
Supply Current (Steady State)
Turn-on current
Output Type
Levels
Symmetry (at 50% Vdd)
Rise/Fall Time
(10%-90%)
Stability vs. Temperature
NOTE:
Tighter stabilities and
wider temperature ranges
are available, please consult
the factory.
Characteristics
10 to 20.48 MHz (See Page 6 for specific Freq's)
See page 4 for outline Drawings and Dimensions
(C)
(D)
5.0 Vdc ±5%
3.3 Vdc ±5%
< 70 mA @ +25°C and 5 Vdc
, <90 mA @+25C and 3.3Vdc
<120 mA @ -40°C and 5 Vdc,
<150 mA @-40C and 3.3Vdc
300 mA maximum @ 5.0 Vdc
, 450 mA maximum @ 3.3V
(A)
HCM0S,
(G or H)
Sinewave
into 50 ohms
(G)
0 dBm,
(H)
+3 dBm
(A)
<0.4
Volts, >0.9 Vdd,
(A)
50/50 ±10%
(A)
<7 ns
D-107
= ±0.1 ppm over -20°C to +70°C
D-ST3
= Stratum 3 over -20°C to +70°C
F-ST3
= Stratum 3 over -40°C to +85°C
F-107
= ±0.1 ppm over -40°C to +85°C
x-ST3
= Stratum 3 Holdover stability per GR-1244-CORE
280 ppm pk-pk over temperature, < 40 ppb
drift.
<1 x 10
-9
/day average, <1 x 10
-7
/
year,
<1 x 10
-6
/10 years
<5 x 10
-10
, 0.1 seconds to 10 seconds
Offset
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
PhaseNoise
-100 dBc/Hz
-130 dBc/Hz
-140 dBc/Hz
-145 dBc/Hz
-150 dBc/Hz
Standard
60 seconds
120 seconds
Optional
(consult factory)
45 seconds
90 seconds
Aging
(10 MHz Typical)
Short
-Term
Stability (Allan Deviation)
Phase
Noise (Static Conditions)
Frequency vs. Supply
Warm-up (Restabilization)
(frequency relative to that 1 hour after turn-on,
following 24 hours off time, at +25°C)
Electrical Frequency Adjust
Initial Accuracy for Fixed Frequency
Acceleration Sensitivity
(10 MHz)
<2.5 x 10
-9
per percent change
< ±1 x 10
< ±1 x 10
-7
-6
A:
>±1 ppm range with 0 to Vdd input voltage
F:
±1 ppm @ +25°C
1 x 10
-9
/g Total Gamma, standard
10
(5 x 10
-
/g available at 10 MHz consult factory)
Vectron International •
267 Lowell Road, Hudson, NH 03051
2
• Tel: 1-88-VECTRON-1 • Web: www.vectron.com
EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Performance Characteristics for frequencies in the range 20.5 to 80 MHz
Parameter
Available Frequencies
Size
Supply Voltage
Supply Current (Steady State)
Turn-on current
Output Type
Levels
Symmetry (at 50% Vdd)
Rise/Fall Time (10-90%)
Stability vs. Temperature
Characteristics
20.5 to 80 MHz (See Page 6 for specific Freq's)
See page 4 for outline Drawings and Dimensions
(C)
(D)
5.0 Vdc ±5%
3.3 Vdc ±5%
< 70 mA @ +25°C and 5 Vdc,
<90 mA @+25C and 3.3Vdc
<120 mA @ -40°C and 5 Vdc,
<150 mA @-40C and 3.3Vdc
300 mA maximum @ 5.0 Vdc,
450 mA maximum @ 3.3V
(A)
(A)
(A)
HCM0S
,
50/50 ±10%
<5 ns
(G or H)
Sinewave
into 50 ohms
(G)
0 dBm,
(H)
+3 dBm
(A)<0.4
Volts, >0.9 Vdd
D-ST3
=
Stratum 3
over -20°C to +70°C
D-107
=
±0.1 ppm
over -20°C to +70°C
(< 50 MHz)
F-507
=
±0.5 ppm
over -40°C to +85°C
F-147
= ±0.14 ppm over -40°C to +85°C (<50 MHz)
x-ST3 = Stratum 3 Holdover stability per GR-1244-CORE.
NOTE:
Tighter stabilities and wider
temperature ranges are available,
please consult the factory.
280 ppm pk-pk over temperature, <40 ppb
drift.
Aging
(38.88 MHz Typical)
Short Term Stability (Allan Deviation)
Phase
Noise
(Static Conditions)
<3 x 10
-9
/day average, <3 x 10
-7
/
year,
<3 x 10-6 /10 years
<5 x 10
-10
, 0.1 seconds to 10 seconds
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
-9
<2.5 x 10 per percent change
< ±1 x 10
-6
Frequency vs. Supply
Warm-up (Restabilization)
(frequency relative to that 1 hour after turn-on,
following 24 hours off time, at +25°C)
Electrical Frequency Adjust
Initial Accuracy for Fixed Frequency
Acceleration Sensitivity
Standard
60 seconds
Optional
(consult factory)
45 seconds
< ±1 x 10
-7
120 seconds
90 seconds
A:
>±3 ppm range with 0 to Vdd input voltage
F:
±1.5 ppm
@ +25°C
1 x 10
-9
/g Total Gamma, standard
Vectron International •
267 Lowell Road, Hudson, NH 03051
3
• Tel: 1-88-VECTRON-1 • Web: www.vectron.com
EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Outline Drawing
Marking
7.62 MAX
(.30 MAX)
5.08 MIN
(.20 MIN)
0.457 DIA
(.018 DIA)
380 Package
Pin
1
7
8
14
Function
Frequency Adjust
*
GND, Case
Output
Supply
Standoff’s
3 places at
pins.
Square Corner Pin 1
3.81
(.15)
7.63
(.30)
1
14
20.83
(.82)
Gnd Pin
No Standoff
7
8
C
L
13.21
(.52)
Pin Numbers
do not appear on the unit.
* Pin 1 is the Oven Alarm with option G.
2.54
(.10)
15.24
(.60)
Marking
381(ht=
0.4")
,385
(ht=0.35")
Package
Square Corner Pin 1
(0.35"
:385,
0.4":
381)
4 PLACES
0.635 MAX
(.025 MAX)
1.727
(.068)
1.016 DIA
(.040 DIA)
2.54
(.100)
1
2
12.70
(.50)
4
3
Pin
1
2
3
4
Function
Frequency Adjust*
GND, Case
Output
Supply
2.54
(.100)
Pin Numbers
do not appear on the unit.
* Pin 1 is the Oven Alarm with option G.
15.24
(.600)
20.32
(.80)
Vectron International •
267 Lowell Road, Hudson, NH 03051
4
• Tel: 1-88-VECTRON-1 • Web: www.vectron.com
EX-380 Evacuated Miniature Oven Controlled Crystal Oscillator
Recommended Reflow Profile
Temperature ( º C)
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
Human-Body (HBM)
Charged-Device
Threshold
500
500
Unit
V min
V min
Vectron International •
267 Lowell Road, Hudson, NH 03051
5
• Tel: 1-88-VECTRON-1 • Web: www.vectron.com
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