Vectron International 267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
1
Oven Controlled Crystal Oscillators (OCXO's)
EX-240 (EMXOTM)
Description:
The EX-240 Series offers a ruggedized hybrid thick film construction in a low
profile, hermetically sealed 16 pin DDIL package, which can withstand severe
environmental conditions. This product series utilizes VI's EMXO
TM
technology
resulting in excellent stability performance and fast warm-up with low power
consumption.
Features:
* Temperature Stability: to 1 x 10-8 over 0C to +50C
* Acceleration Sensitivity: < 1 x 10-9 / g Total Gamma
* Low power consumption: < 0.7 W @ +25C
* Shock: 1,000g's peak, 0.5 ms
* Vibration: 20g peak to 2 kHz (Sine), 30 Grms overall to 2 kHz (Random)
Performance Characteristics
Frequency Range:
10 to 20.48 MHz
Package Size:
See next page for drawings and dimensions (reduced height option is available)
Supply Voltage: (C) +5 Vdc 5%, (D): +3.3 Vdc 5%
Supply Current (Steady State): <140 mA @ +25C , <220 mA @ -40C with +5V supply
<210 mA @ +25C , <330 mA @ -40C with +3.3V supply
(reduced current option is available)
Turn-on Current: <500 mA with +5Vdc supply, <600 mA with +3.3 Vdc supply
Output Type:
(A) HCMOS
Level "0" and "1": <0.4 Volts, >0.9 Vdd
Rise/Fall Time (10-90%): <7 ns
Symmetry (Duty Cycle): 50/50 10% (at 50% Vdd)
Output Type: (H) +3 dBm minimum into 50 ohms
Harmonics: - 20 dBc
Spurious: - 60 dBc
Temperature Stability: B-108 = 10 ppb over 0C to +50C
C-208 = 20 ppb over 0C to +70C
(Note: Tighter stabilities and wider temperature D-308 = 30 ppb over -20C to +70C
ranges are available, please consult factory.) F-508 = 50 ppb over -40C to +85C
Aging (10MHz Typical): <1x10
- 9
/day average, <1x10
- 7
/ year average, <1x10
-6
/10 years
Short-Term Stability (Allan Deviation): <1x10
-10
, 0.1 seconds to 10 seconds
Phase Noise: Offset
Phase Noise
(typical at 10 MHz, Static Condition)
10 Hz -100 dBc/Hz
100 Hz -130 dBc/Hz
1 kHz -140 dBc/Hz
10 kHz -145 dBc/Hz
100 kHz -150 dBc/Hz
Frequency vs. Supply: <2.5x10
- 9
per percent change
Warm-up (Restabilization):
Standard
Optional (consult factory)
(frequency relative to that 1 hour after turn-on,
<1x10
-6
60 seconds 45 seconds
following 24 hours off time, at +25C) <1x10
- 7
120 seconds 90 seconds
Electrical Frequency Adjust: > 1ppm range with 0 to Vdd input voltage
Acceleration Sensitivity: 1x10
-9
/g Total Gamma, standard
(10 MHz)
5x10
-10
/g available at 10 MHz (consult factory)
Parameter Characteristics
Vectron International 267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com 7Dec05
2
Oven Controlled Crystal Oscillators (OCXO's)
240 Package Outline Drawing
Environmental Specifications (designed to meet)
Ordering Information
Capabilities
Pin
Function
1 Frequency Control
2-4 N/C. Internal use ONLY
8 Case, Ground
9
Output
13-15
N/C
16
Supply
Pin numbers are for reference, only, they do not appear on unit
240
5 0 8
EX
C
A
F
A
12.800
MHz
Package
240
Output Frequencies
10.000 MHz
16.384 MHz
10.230 MHz
19.440 MHz
12.800 MHz
20.000 MHz
13.000 MHz
20.480 MHz
Other Options
A = Electrical Frequency Adjust (standard)
F = Fixed Frequency, No Frequency Adjust,
Initial Accuracy at +25C is 1 ppm
Temperature & Stability
B-108 = 10 ppb over 0C to +50C
C-208 = 20 ppb over 0C to +70C
D-308 = 30 ppb over -20C to +70C
F-508 = 50 ppb over -40C to +85C
Note: Tighter stabilities and wider temperature
ranges are available, please consult the factory.
Output
A = HCMOS
H = + 3dBm sine
Supply Voltage
C = 5.0 Vdc 5%
D = 3.3 Vdc 5%
VI can offer this series with screening and conformance inspection based upon MIL-PRF-55310 for Product level B. Also, a
reduced current option is available. Please contact your local VI representative or VI for details.
EX-240
EX = EMXO
OCXO
Shock - 1000g's peak, 0.5 ms per MIL-STD-202, Method 213, Condition E
Vibration (Sine) - 20g peak to 2 kHz per MIL-STD-202, Method 204, Condition D
Vibration (Random)- 30 Grms overall per MIL-STD-202, Method 214, Condition I-H
Acceleration - 1000g per MIL-STD-202, Method 212, Condition C
Thermal Shock - 50 cycles, -55C to +85C per MIL-STD 202, Method 107, Condition A-2
Altitude - 70,000 ft per MIL-STD 202, Method 105, Condition C
Seal - Hermetic per MIL-STD-202, Method 112, Condition C
Humidity - 90% RH per MIL-STD-202, Method 103, Condition A
Reflow Profile
TIME(s)
TEMPERATURE(C)
PDF 
ZIP