Ultra Low Phase Noise
Oven Controlled Crystal Oscillator
OX-304 at 10 MHz
OX-304
OX-304
The OX-304 is an Ultra Low Phase Noise Ovenized Crystal Oscillator with a noise floor as low as -173 dBc/Hz in a compact 0.8” x 0.8”
enclosure. Designed for applications that demand extremely low noise sources, including the reference oscillator for a phase-locked
loop in the microwave spectrum. Custom frequencies available upon request.
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•
•
•
-135 dBc/ Hz at 10 Hz offset
-173 dBc/Hz at 10 kHz offset
10 MHZ standard, other frequencies available
Compact 0.8” x 0.8” hermetic enclosure
Features
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Military Radar
Instrumentation and Test Equipment
Synthesizers
Military Communication Equipment
DRO reference
Satellite Communications
Applications
Performance Specifications
Phase Noise Ordering Codes at 10 MHz
Frequency Offset (Hz)
1
10
100
1000
10,000
100,000
A
-95
-125
-150
-160
-170
-170
B
-100
-130
-155
-165
-170
-170
C
-103
-135
-157
-167
-173
-173
Unit
Condition
Maximum values
All EFC settings
dBc/Hz
Frequency Stabilities at 10 MHz
Parameter
vs. operating temperature range
vs. Initial Tolerance
Allan Deviation
vs. supply voltage change
vs. load change
vs. aging / 1 day
vs. aging / 1
st
year
vs. aging / year
Warm up time
-2
-2
-0.5
-100
-30
Min
-15
-20
-100
Typical
Max
+15
+20
+100
5
+2
+2
+0.5
+100
+30
5
Unit
ppb
ppb
ppb
E-12
ppb
ppb
ppb
ppb
ppb
minutes
Condition
-20 to +70°C (referenced to +25°C)
-40 to +85°C (referenced to +25°C)
at time of shipment and 5V efc
0.1 to 1 second tau
±5% change
5% change in load
after 7 days of operation
after 7 days of operation
after first year of operation
to ±15ppb of 2-hour frequency
@+25°C
Product Performance Data
Phase Noise
Performance Specifications
Supply Voltage (Vs)
Parameter
Supply Voltage
Power Consumption
Reference Voltage
Signal
Load
Output Power
Harmonics
Spurious
Tuning Range
Linearity
Tuning Slope
Control Voltage Range
Input Impedance
Modulation Bandwidth
g-sensitivity
Weight
150
0
100
Positive
10
VDC
kOhm
Hz
Vs=12V
±400
+7.0
50
+13.0
-30
-80
±800
15
10
Min
11.4
Typical
12.0
Max
12.6
4.0
1.8
Unit
VDC
Watts
Watts
VDC
Condition
during warm-up
steady state @ +25°C
12 V version
RF Output
Sinewave
Ohms
dBm
dBc
dBc
ppb
%
50 Ohm load @ Vs=12V
50 Ohm load
50 Ohm load
enough for aging over 15 year lifetime
Frequency Tuning (EFC)
Additional Parameters
1.5
20
ppb/g
grams
Absolute Maximum Ratings
Parameter
Supply Voltage (Vs)
Output Load
Operable Temperature Range
-55
Min
Typical
Max
15
25
+95
Unit
V
Ohms
°C
Condition
12V version
Device will not sustain damage when
operated at temperatures between the
operating range and the operable range,
but will not be specification compliant
Environmental and Product Classification
Shock (Endurance)
Sine Vibration (Endurance)
Random Vibration (Endurance)
Humidity
Seal
Altitude
Resistance to Soldering Heat
Terminal Strength
Moisture Sensitive Level
RoHS
Storage Temperature Range
MIL-STD-202, Method 213, Condition J, 30g 11 ms
MIL-STD-202, Method 201 and 204, Condition A, except 5g to 500 Hz, 1 sweep each axis
MIL-STD-202, Method 214, Condition I-D
MIL-STD-202, Method 103, Condition B, 100% rh
MIL-STD-202, Method 112, Condition D
MIL-STD-202, Method 105, sea level to space
MIL-STD-202, Method 210, Condition A,B,C
MIL-STD-202, Method 11, Condition C (5 bends at 45
o
, 2 lbs)
1
6 (fully compliant) - no pure tin options available upon request, the device will be assigned a
customer part number , not orderable through ordering codes
-55
+125
°C
Outline Drawing
MARKING SURFACE
Code
"H"
Height “H”
13.0
Pin Length “L” Min
5.0
0
1
2
3
Pin Connections
0.30±0.20
.012±.008
"L"
Supply Voltage Input (VS)
RF Output
Ground (case)
Electronic Frequency Control
(EFC)
Reference Voltage (Vref )
0.45±0.03
.018±.001
7.62
.300
5.08
.200
PIN NUMBERS ARE SHOWN FOR REFERENCE ONLY
AND ARE NOT MARKED ON THE UNIT
4
5
SQUARE CORNER
INDICATES PIN 1
2.54
.100
1
7.62
.300
CENT
2
3
15.24
.600
CENT
20.20±0.381
.795±.015
Dimensions in [mm] inches
unnumbered pins are no connects and
are removed at the factory.
5
4
7.62
.300
CENT
2.54
.100
15.24
.600
Code
1
Height “H”
13.0 mm
Pin Length “L” Min
na
Pin Connections
1
2
3
4
5
Electronic Frequency Control (EFC)
Reference Voltage (Vref )
Supply Voltage Input (Vs)
RF output
Ground (case)
Dimensions in [mm] inches
Ordering Information
OX - 304 0 - B E E - 208 0 - 10M0000000
Product Family
OX: OCXO
Package
20x20mm
Height
0: 13.00 mm tht
1: 13.00 mm smd
Supply Voltage
B: +12V
Frequency
Phase Noise and Frequency Control
0: No Tuning, phase noise code A
1: No Tuning, phase noise code B
2: No Tuning, phase noise code C
3: Frequency Tuning, phase noise code A
4: Frequency Tuning, phase noise code B
5: Frequency Tuning, phase noise code C
6: No Tuning, phase noise code D
7: Frequency Tuning, phase noise code D
Stability Code
158: ±15ppb (Temp Code J only)
208: ±20ppb
Temperature Range
E: -40°C to +85°C
J: -20°C to +70°C
RF Output Code
E: Sinewave
Notes:
1. Contact factory for improved stabilities or additional product options including no pure tin options.
2. Certain codes available for sampling and short lead time requests. Please review website for codes.
3. Unless otherwise stated, all values are valid after warm-up time and refer to typical conditions for supply voltage, frequency
control voltage, load, and temperature (25°C).
4. Contact factory for other frequencies. Phase noise degrades for frequencies greater than 10 MHz.
5. Subject to technical modification.
6. Contact factory for availability.
Contact Information
100 Watts Street
Mt Holly Springs, PA 17065
Tel: 1.717.486.3411
Fax: 1.717.486.5920
USA:
Landstrasse
74924 Neckarbischofsheim
Germany
Tel: +49 (0) 7268.801.0
Fax: +49 (0) 7268.801.281
Europe:
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may be superseded by updates. It is your reasonability to ensure that your application meets with your specifications. MICROCHIP
MAKES NO REPRESENTATION OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATU-
TORY OR OTHERWISE, RELATED TO THE INFORMATION INCLUDING, BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFOR-
MANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use.
Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend,
indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses
are conveyed, implicitly, or otherwise, under any Microchip intellectual property rights unless otherwise stated.
Trademarks
The Microchip and Vectron names and logos are registered trademarks of Microchip Technology Incorporated in the U.S.A. and
other countries.
Rev: 5/2/2019 jar
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