OCXO (Oven Controlled Crystal Oscillators) +5.0 V; +12 V
OC31E Series
50 ohm Load Sine Wave
Mercury OC31E is 36.2x27.2 mm 5 pin solder sealed metal pacakge
with 25.4x17.8 mm pin-to-pin spacing high stability low aging OCXO.
Besides standard AT cut crystal, users can also choose SC cut crystal
for better performance. HCMOS square wave output is available as OC31T series.
OC30E series: Same package size as OC31E but with different pin configurations.
General Specifications
( 10 MHz at+25°C, at specified Vcc and +2.5 V Vcon)
MERCURY
Since 1973
Frequency Stability
vs
Sine wave. Wave form code is “E”
10 MHz ~100.0 MHz
AT-cut.
Use “A” for crystal code or
SC-cut:
use “S” for crystal code.
Type of Crystal Cut Used
SC has better performance but higher cost. See technical note TN-031.
Supply Voltage (Vcc)
+5.0 V
D.C
±5% (voltage code is “5”); +12.0 V
D.C
±5% (voltage code is “12”)
±0.5 ppm max. at time of shipment; Vcon=+2.5V
Initial Calibration Tolerance
Best Stability
0°C to +60°C
-20°C to +70°C
-40°C to +85°C
Operating Temperature Range
±0.03 ppm
±0.08 ppm
±0.2 ppm
For
AT
crystal
(custom spec. on request)
±0.01 ppm
±0.02 ppm
±0.03 ppm
For
SC
crystal
Aging
(after 72 hours of
AT:±3
ppb max./day; ±0.5 ppm max./first year;±3 ppm max. over 10 years.
continuous operation)
SC:
±2 ppb max./day; ±0.1 ppm max./first year;±0.5 ppm max. over 10 years.
±20 ppb max.
Supply Voltage ±5% Variation
Load ±5% variation
Warm-up time (at +25°C)
Voltage Control on
pin 1 (EFC)
(Electronics
Frequency Tuning)
Freq. Deviation Range
Control Voltage Range
Transfer Function
Input Impedance
±20 ppb max.
AT:
3 minutes max. Within ±0.5 ppm of its reference frequency.
SC:
1 minute max. Within ±0.1 ppm of its reference frequency.
Referenced to fo at +25°C and over
AT:
±5 ppm min. ±20 ppm max.;
operating temperature range.
SC:
±0.5 ppm min, ±2 ppm max.
2.5 V ± 2.0 V
Positive: Increasing control voltage increases output frequency.
100 K ohms min.
±10% max.
1.2 Watts max. at steady-state; 3.5 Watts max. at turn-on.
+3 dBm typical; +8 dBm max. with 50Ω load
-30 dBc min.
-75 dBc min.
+4.0 V
D.C
.±0.3 V
D.C
. or custom.
1 Hz
10 Hz
100 Hz
-75 dBc
-100 dBc
-130 dBc
-85 dBc
-120 dBc
-140 dBc
-55°C to +125°C
2000 G’s, 0.3 ms ½ sine
10 to 2000 Hz / 10 G’s
1 KHz
-140 dBc
-145 dBc
10 KHz
-150 dBc
-150 dBc
Output Wave Form
Frequency Range
Power
EFC Linearity
Power Dissipation (at +25°C)
Output Level
Harmonic
Spurious
Output
Reference Voltage
Offset
Phase 10 MHz AT-cut XTAL
Noise
10 MHz SC-cut XTAL
Storage Temperature
Shock
Vibration
Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: sales-tw@mercury-crystal.com
U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: sales-us@mercury-crystal.com
MERCURY
Page 1 of 2
Date: July 20, 2006
Rev. 0
MERCURY
www.mercury-crystal.com
OCXO (Oven Controlled Crystal Oscillators) +5.0 V; +12 V
OC31E Series
50 ohm Load Sine Wave
OC31E Test Circuit
Bottom view
Oscilloscope
50 ohm
coaxial
MERCURY
Since 1973
A
-
+
Vcc
+
V
-
0.1uF
Vcon
-
+
Frequency counter
OC31E Series Package Dimensions and Pin Connections:
Pin 1: Voltage Control EFC
Pin 2: Reference Voltage Output
Pin 4: RF Output
Pin 5: Ground / Case
unit mm
Pin 3: Supply Voltage
Part Number Format and Example:
Example:
OC31E5S-10.000-0.01/-20+70
OC 31
E
5
S
—
dash
10.000
—
dash
0.01
⁄
slash
-20+70
:
“OC” Product Prefix for OCXO
:
Package type. “31” for OC31 package
:
Output wave form code. “E” for 50 ohm load Sine wave.
:
Supply voltage code. “5” for +5.0V; “12” for +12.0V
:
Crystal type. Use “A” for AT-cut crystal; Use “S” for SC-cut crystal.
:
Frequency in MHz;
:
Frequency stability in ppm;
:
Operating temperature range: -20°C to +70°C in this case.
MERCURY
Page 2 of 2
Date: July 20, 2006
Rev. 0
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