VFT8S Series
Micro-miniature, Evacuated
Product Data Sheet
Features
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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)
Low Cost
-10
-8
Low Aging (5x10 /day, 5x10 /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
Ø0.500(12,7mm)
0.395 (10,0mm)
0.48 (12,2mm)
0.25 (6,35mm) MIN
Ø0.018 (0,45mm)
0.300 (7,62mm)
0.600 (15,2mm)
Applications
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Telecommunications
Data Communications
Battery Powered Systems and Equipment
GPS
Instrumentation
SARSAT Beacons
8
1
2
4
0.100 (2,54mm)
0.300 (7,62mm)
8
1
2
4
5
5
0.670 (17,0mm)
Ø0.580(14,3mm)
SMD Version
Vcc
SMD Reflow Profile
250
Temperature, °C
200
150
100
50
0
0
50
100
150
200
Vc
0.1K
Vref
1
2
8
DUT
4
5
OUTPUT
10K
Time, s
75 South Street, Hopkinton, MA 01748
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800-982-5737
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508-435-6831
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FAX 508 435-5289
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www.valpeyfisher.com
VFT8S Series
Micro-miniature, Evacuated
Specifications:
Parameter
Symb
Absolute Maximum Ratings
Input Break
Vcc
Down Voltage
Storage temper.
Ts
Control Voltage
Vc
Electrical
Frequency
F
Frequency stability
∆F/F
Condition
Min
-0.5
-40
-1
4.8
vs. Temp.
vs. Supply
Calibration
per day
per year
.1s to 10s
10 Hz
100 Hz
10 KHz
After 30 minutes
worst direction
4.75
10.000
±100
1
±0.5
1E-9
1E-7
1E-11
-120
-145
-160
Typ
Max
13.0
85
9
50
5
Unit
V
°C
V
MHz
ppb
ppb/V
ppm
Note
Aging
Allan Variance
SSB Phase Noise
No VCXO
after 30 days
dBc/Hz
Deteriorates by
20LogN at higher
Frequencies
steady state, 25°C
steady state, -30°C
start-up current
Load
10KOhm//15pF
Warm-up time
to 0.1ppm accuracy
35
s
τ
Output Waveform
HCMOS/TTL compatible
* Control voltage
Vc
0
4.0
V
2.8
For 3.3V supply
* Pull range
from nominal F
±0.3
±0.5
ppm
* Deviation slope
Monotonic, posit
0.15
ppm/V
* Setability
Vc0
@25°C, Fnom.
1.0
2.0
3.0
V
.8
1.4
2.0
Environmental and Mechanical
Operating temp. range
-30°C to 70°C 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 260°C, for 10s, Max, 230°C 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 3- N/C; Pin 4- Case, GND; Pin5 – Output; Pin 8- Vcc
Retrace
G-sensitivity
Input Voltage
Input Current
Vcc
Icc
5.0
25/35
70/120
130/150
±20
±1.0
5.25
35/40
ppb
ppb/G
V
mA
3.3V±5% optional
5V/3.3V supply
VFT8S
S for SMD
Temperature Range
Code
Specification
A
0°C to 50°C
B
-10°C to 60°C
C
0°C to 70°C
D
-20°C to 70°C
E
-30°C to 70°C
F
-40°C to 85°C
Creating a Part Number
“V” for
VCXO
Temperature Stability
Code
Specification
57
5x10
-7
27
2.8x10
-7
17
1x10
-7
58
5x10
-8
28
2x10
-8
YZ
Yx10
-Z
FREQUENCY, MHz
Rev 11/05
Aging
Code
L
S
Supply Voltage
Specification
1x10
-9
/Day
5x10
-10
/Day
Code
5
3
Specification
5V ± 5%
3.3V ± 5%
Not all combinations are available.
Consult Factory.
* - optional
75 South Street, Hopkinton, MA 01748
•
800-982-5737
•
508-435-6831
•
FAX 508 435-5289
•
www.valpeyfisher.com
All parameters for 10 MHz
See chart below
Wireless Connectivity
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