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1750 Broadway Street
Charlottesville, VA 22903
Phone: (434) 295-3101
Fax: (434) 977-1849
Charlottesville, VA USA
www.isotemp.com www.taitien.com
OCXO 131-1004
CRYSTAL
OSCILLATOR
SPECIFICATION
This specification defines the operating characteristics of
an ovenized crystal oscillator. Long term stability
is assured through use of premium components.
REV.
DESCRIPTION OF REVISION
-
A Updated to new Format.
DWN. APV.
BY BY
DATE
TST TST 06-19-2007
BTG JRD 02-25-2008
ISOTEMP RESEARCH INC.
CHARLOTTESVILLE, VA.
USA
MODEL NO.
OCXO 131-1004
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13
DWG. NO. REV.
114-1275
A

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Charlottesville, VA USA
www.isotemp.com www.taitien.com
OCXO 131-1004
1. OUTPUT(PIN = "R.F. OUTPUT")
1.1. Frequency
1.2. Waveform
1.3. Level
a. "1" level
b. "0" level
1.4. Load
1.5. Duty cycle
1.6. Rise/fall time
1.7. Spurious
10.000000 MHz
Rectangular
HCMOS
> +4.4 V
< +0.4 V
15pF
45% to 55%@ +2.5 V
< 3 ns (10% to 90%)
< -70 dBc
2. FREQUENCY STABILITY
2.1. Ambient
2.2. Aging
a. At time of shipment
b. After indefinite storage
i. Daily
ii. Yearly
iii.15years
2.3. Voltage
2.4. Short term
2.5. Warm-up
2.6. Phase noise
a. @ 10 Hz
b. @ 100 Hz
c. @ 1k Hz
d. @ 10 kHz
e. @ 100 kHz
< ±3x10-9, -10C to +70C
< ±3x10-10/day
< ±3x10-10 after 30 days
< ±5x10-8
< ±3.5x10-7
< ±1x10-9/±5% change
< 1x10-11/second
root Allan variance
< ±5x10-8 in 8 minutes
(referenced to 1 hour)
< -120 dBc
< -140 dBc
< -150 dBc
< -150 dBc
< -150 dBc
ISOTEMP RESEARCH INC.
CHARLOTTESVILLE, VA.
USA
MODEL NO.
OCXO 131-1004
PAGE OF TOTAL
23
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114-1275
A

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Charlottesville, VA USA
www.isotemp.com www.taitien.com
OCXO 131-1004
3. ELECTRICAL FREQUENCY ADJUSTMENT (PIN = "VCO INPUT")
3.1. Range
> ±4x10-7
< ±8x10-7 (At time of shipment)
(Referenced to nominal frequency)
3.2. Control
0 to +5 V
3.3. Slope
Positive
3.4. Center
+2.5 ±0.3 V
(Control voltage at which nominal
frequency occurs at time of shipment)
(NOTE: When not connected,
VCO INPUT is internally held in
this voltage range.)
3.5. Linearity
3.6. Input impedance
< ±10%
> 50 kΩ
4. INPUT POWER (PIN = "+VDC")
4.1. Voltage
4.2. Current
4.3. Steady state
+12 V ±5%
< 350 mA @ turn on
< 2.2 Watts @ +25C
5. REFERENCE VOLTAGE (PIN = "REFERENCE VOLTAGE"), Not Connected
6. RoHS
All units supplied under this MODEL NUMBER are RoHS compliant.
7. MECHANICAL(Outline drawing)
7.1. Applicable series
7.2. Model number
7.3. Outline drawing
OCXO 131 series
OCXO 131-1004
125-597
ISOTEMP RESEARCH INC.
CHARLOTTESVILLE, VA.
USA
MODEL NO.
OCXO 131-1004
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(VIEW FROM TOP)
MARKING THIS
SURFACE
0.500
12.70
MAX.
0.026
0.66
0.20
5.08
MIN.
00..07391DIA. PIN (5 PLACES)
GLASS STANDOFF
(4 PLACES)
PIN CONNECTIONS
PIN FUNCTION
VCO INPUT
1 or
(See Note 1) NOT CONNECTED
2
REFERENCE VOLTAGE
or
(See Note 1) NOT CONNECTED
3 +VDC
4 R. F. OUTPUT
5 0 VOLTS & CASE
Note 1. If the specification does not specify
parameters for either PIN1 or PIN2 then that
respective PIN is NOT internally CONNECTED.
MARKING
1.43 MAX.
36.32
1.000
25.40
CENT.
3
CL 2
4
15
107.7.7080CENT.
1.07
27.18
MOD:
FREQ.:
S/N:
DATE:
MOD:
FREQ.:
S/N:
DATE:
(VIEW FROM BOTTOM)
NUMBERS FOR REFERENCE ONLY
(NOT STAMPED ON UNIT)
OSCILLATORS
NAME: OUTLINE DRAWING
(TCXO 141 & OCXO 131 SERIES)
A Max height was .515.
B NEW FORM AND UPDATED MARKING.
LET REVISION
INCH
mm (REFERENCE ONLY)
Form NO. 120-081E
CODE I.D. NO.
31785
Charlottesville, Virgina USA
SCALE: 1:1
DATE: 02-26-2002
DWN. BY: LRB
APPR'D. BY: DAG
BTG TST 04-06-2004
TOLERANCES
BTG
JRD 02-26-2008
UNLESS OTHERWISE SPECIFIED:
ANGES: ±1 DEGREE
FRACTIONS: ±1/32 INCH
DECIMALS: .XX ± .015, .XXX ± .010 INCH
MATERIAL: STEEL
FINISH: NICKEL
BY APP DATE MARK: LABEL