VF Technologies
75 South Street, Hopkinton, MA 01748 Tel. 1-800-XTALREP, 508-435-6831 FAX 508 4355289
1
VFT8H Series Micro-miniature, Evacuated OCXO
Product Data Sheet
Features
Smallest OCXO available (< 1 cm
3
, 2g weight)
SC-cut crystal
High Vacuum Sealed Enclosure
Extremely Low Power Consumption (<100 mW)
Very Fast Warm-up Time (30s)
High Stability (up to 5x10
-9
over 0C to 50C)
Low Aging (5x10
-10
/day, 5x10
-8
/year)
Very Low Phase Noise (-160dBc/Hz TYP)
HCMOS/TTL output
"Gull-Wing" SMD Version Available
4.8 MHz to 50 MHz Frequencies Available
"Half-size", DIL-8 compatible pinout
Applications
Telecommunications
Data Communications
Battery Powered Systems and Equipment
GPS
Instrumentation
SARSAT Beacons
COOL...TO THE TOUCH
SMD Reflow Profile
0
50
100
150
200
250
0
50
100
150
200
Time, s
Temperature, C
Vref
0.1K
10K
4
DUT
2
Vc
8
1
Vcc
OUTPUT
5
8
4
0.670 (17,0mm)
0.580(14,3mm)
0.018 (0,45mm)
0.300 (7,62mm)
0.25 (6,35mm) MIN
2
5
1
0.300 (7,62mm)
0.500(12,7mm)
0.395 (10,0mm)
0.100 (2,54mm)
SMD Version
0.600 (15,2mm)
0.48 (12,2mm)
1
2
4
5
8
VF Technologies
75 South Street, Hopkinton, MA 01748 Tel. 1-800-XTALREP, 508-435-6831 FAX 508 4355289
2
VFT8H Series Micro-miniature, Evacuated OCXO
Specifications:
Parameter Symb
Condition
Min
Typ
Max
Unit
Note
Absolute Maximum Ratings
Input Break
Down Voltage
Vcc -0.5
13.0
V
Storage temper.
Ts -40
85
C
Control Voltage
Vc -1
9 V
Electrical
Frequency
F 4.8
10.000
50
MHz
vs. Temp.
20
ppb
See chart below
Frequency stability
F/F
vs.
Supply 1 5 ppb/V
Aging
per day
per year
5E-10
1E-7
after 30 days
Allan Variance
.1s to 10s
1E-11
SSB Phase Noise
10 Hz
100 Hz
10 KHz
-120
-145
-160
dBc/Hz
Deteriorates
by
20LogN at higher
Frequencies
Retrace
After 30 minutes
20
ppb
G-sensitivity
worst direction
1.0
ppb/G
All par
a
me
ters f
o
r 10 MHz
Input Voltage
Vcc 4.75
5.0
5.25
V
3.3V
Input Current
Icc
steady state, 25C
steady state, -30C
start-up current
25/35
70/85
150/150
35/50 mA
5V/3.3V
supply
Load
10KOhm//15pF
Warm-up time
to 0.1ppm accuracy
35
s
45s at 3.3V supply
Output Waveform
3.3V
HCMOS/TTL
compatible
Tristate Control
Logic "high" or floating active; logic "low" infinite impedance
Control voltage
Vc
0
4.0
V
2.8 V with 3.3V supply
Pull range
from nominal F
0.5
1
ppm
Deviation slope
Monotonic,
posit 0.4
ppm/V
Setability
Vc0 @25C,
Fnom. 1.0 2.0 3.0
V
(1.4 .8)V with 3.3V
Environmental and Mechanical
Operating temp. range
-30C to 70C Standard, Other options see chart below
Mechanical Shock
Per MIL-STD-202, 30G, 11ms
Vibration
Per MIL-STD-202, 5G to 2000 Hz
Soldering Conditions
Leads Temperature 260C, for 10s, Max, 230C for 30s Max SMD profile
Hermetic Seal
Leak rate less than 1x10-8 atm.ccm/s of helium
Electrical Connections
Pin Out
Pin 1- Vc ; Pin 2-Vref; Pin 4- Case, GND; Pin5 Output; Pin 8- Vcc
Creating a Part Number
VFT8H
FREQUENCY, MHz
Temperature Range
Code Specification
A
0C to 50C
B
-10C to 60C
C
0C to 70C
D
-20C to 70C
E
-30C to 70C
F
-40C to 85C
Temperature Stability
Code Specification
17 1x10
-7
58 5x10
-8
28 2x10
-8
18 1x10
-8
59 5x10
-9
YZ Yx10
-Z
Aging
Code Specification
L 1x10
-9
/Day
S 5x10
-10
/Day
P 2x10
-10
/Day
Supply Voltage
Code Specification
5
5V 5%
3
3.3V 5%
Not all combinations are available. Consult Factory
.
"V" for
VCXO
S for SMD
Rev 04172003
PDF 
ZIP