OCXO (Oven Controlled Crystal Oscillators)
OC14T33A, OC14T33GA (RoHS version),
Full size 4 pin DIP full metal package
+3.3 V D.C supply Voltage
15 pF load HCMOS square wave output
AT-cut crystal
Voltage control (Electronic Frequency Tuning) on pin 1
+3.3 V
HCMOS Square
MERCURY
Since 1973
General Specifications
( 10 MHz at+25°C, at +3.3 V Vcc and +1.65 V Vcon)
Output Wave Form
Frequency Range
Type of Crystal Cut Used
Supply Voltage (Vcc)
Initial Calibration Tolerance
HCMOS Square Wave. Wave form code is “T”
1.25 MHz ~40.0 MHz
AT-cut.
Use “A” for crystal code.
+3.3 V ±0.15 V (voltage code is “33”)
±0.5 ppm max. at the time of shipment. Vcon=+1.65 V
Operating
0°C to +60°C
-20°C to +70°C
-40°C to +85°C
Temperature
Best Stability
±0.075 ppm
±0.15 ppm
±0.25 ppm
Available
Typical Stability
±0.2 ppm
±0.3 ppm
±0.5 ppm
< ±0.7 ppm first year. < ±4.0 ppm over 10 years.
<5 E
-10
(0.1 sec to 30 sec.); typical 5 E
-11
at 1 sec.
< ±0.1 ppm
< ±0.01 ppm
Load ±5% variation
5 minutes max. Within ±0.1 ppm of its reference frequency.
±4 ppm min. Referenced to fo at +25°C.
0.0 V to 3.3 V
Positive: Increasing control voltage increases output frequency.
47 K ohms min.
±10% max.
1.5 Watts max. at steady-state. 2.5 Watts max. at turn-on.
10 LS or 47 pF max.
50% ±10%
+2.8 V min
1 Hz
-80 dBc
Output Voltage Logic Low (V
OL
)
10 Hz
-110 dBc
100 Hz
-135 dBc
+0.4 V max.
10 KHz
-150 dBc
7 nS max. ( measured at 20%
⇄
80% of waveform.)
1 KHz
-145 dBc
Frequency Stability
vs
Operating Temperature Range
(custom spec. on request)
Aging
Short Term Stability
Supply Voltage ±0.15V Variation
Warm-up time (at +25°C)
Freq. Deviation Range
Control Voltage Range
Transfer Function
Input Impedance
EFC Linearity
Power
Output
Offset
10 MHz at static
condition
Storage Temperature
Phase
Noise
Shock
Vibration
Voltage Control
on pin 1 (EFC)
(Electronics
Frequency
Tuning)
Power Dissipation (at +25°C)
Load (Fan Out)
Duty Cycle (measured at 1/2Vcc)
Output Voltage Logic High (V
OH
)
Rise and Fall Time
-65°C to +125°C
2000 G’s, 0.3 ms ½ sine
10 to 2000 Hz / 10 G’s
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: Aug 20, 2006
Rev. 1
MERCURY
www.mercury-crystal.com
OCXO (Oven Controlled Crystal Oscillators)
OC14T33A, OC14T33GA (RoHS version),
OC14T33A Test Circuit:
Frequency counter
+3.3 V
HCMOS Square
MERCURY
Since 1973
T2
Oscilloscope
A
14
1
0.1uF
+
T1
90%
50%
8
7
15 pF
-
+
Vcc +
V
-
10%
-
V control
Tr
Tf
Duty Cycle =
T1
T2
*100%
OC14T33A Package Dimensions and Pin Connections:
Pin 1: Voltage Control (EFC) Pin 7: Ground / Case
Pin 8: RF Output
Pin 14: Supply Voltage
unit mm [inches]
Square corner is pin No. 1
Part Number Format and Example:
Example:
OC14T33GA-10.000-0.1/-20+70
OC
14 T
33
G
A
—
dash
10.000
—
dash
0.1
⁄
-20+70
slash
:
“OC” Product Prefix for OCXO
:
Package type. “14” for 4 pin DIP.
:
Output wave form code. “T” for HCMOS square wave.
:
Supply voltage code. “33” for +3.3 V;
:
“G” for RoHS compliant equivalent,” ”(blank) for non-RoHS part.
:
Crystal type. “A” for AT-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: Aug 20, 2006
Rev. 1
Power technology
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