VFT8S
OCXO Ultra Low Power
DIL8 Compatible, CMOS / TTL
Features
RoHS Status
Extremely Low Power Consumption (<100 mW)
± 20ppb Stability over 0°C to 50°C
Compact DIL-8 Package (14.3 x 14.3mm)
35 second Warm-up Time
Available in through hole and gullwing configuration
Applications
Portable Wireless Communications
Battery Powered Systems and Equipment
GPS
Instrumentation
SARSAT Beacons
Not recommended for new designs. Please see VFOV400 and VFOV500.
Electrical Specifications
Parameter
Frequency
Range
Symbol
F
Vs. Operating Temperature
Vs. Supply Voltage
Vs. Aging / Day
Vs. Aging / Year
Operating
Temperature
Range
Allan
Variance
SSB Phase
Noise
Retrace
G-sensitivity
Supply
Current
Supply
Voltage
Icc
T
0°
0°
-20°
-40°
0.1s to 10s
10Hz
100Hz
10KHz
After 30 minutes
Worst Direction
Steady state, 25°C
Steady state, -30°C
Start-Up
4.75
3.13
25/35
70/120
130/150
5.00
3.3
1 x 10
-11
-120
-145
-160
± 20
± 1.0
35/40
dBc/Hz
ppb
ppb/G
mA
5V / 3.3V
Deteriorates
by 20LogN for
higher freq.
Condition
Min
4.8
± 50
±1
1
100
+50°
+70°
+70°
+85°
Typ
Max
50
Unit
MHz
ppb
ppb/V
ppb
ppb
°C
See How to
Order Chart
After 30 days
See How to
Order Chart
for all options
Note
Frequency
Stability
∆F/F
±5
Vcc
5.25
3.46
V
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-497-6377 • www.valpeyfisher.com • RevE1208
1
VFT8S
OCXO Ultra Low Power
DIL8 Compatible, CMOS / TTL
Electrical Specifications
Parameter
Output
Waveform/Load
Warm-up Time
Power
Consumption
Control Voltage
Deviation slope
Setability
Pull Range
Vco
Symbol
Condition
CMOS/TTL
To 0.1 ppm
accuracy
Steady State @
25°C
0
0
Monotonic, Positive
25°C
From nominal F
1.0
0.8
± 0.3
2.0
1.4
± 0.5
Min
Typ
35
40
125
115
Max
Unit
s
175
mW
132
4.0
V
2.8
0.15 ppm/V typical
3.0
2.0
V
ppm
Note
5.0V
3.3V
5.0V
3.3V
5.0V
3.3V
5.0V
3.3V
10KOhm / 15pF
P
Vc
How to Order
G for Gullwing
VFT8S
Temperature Range
Code
A
B
C
D
E
F
Specification
0°C to 50°C
-10°C to 60°C
0°C to 70°C
-20°C to 70°C
-30°C to 70°C
-40°C to 85°C
FREQUENCY, MHz
V for VCXO
Temperature Stability
Code
57
27
17
58
28
Specification
500 ppb
200 ppb
100 ppb
50 ppb
20 ppb
Aging
Code
L
S
Specification
1.0 ppb/day
0.5 ppb/day
Supply Voltage
Code
5
3
Specification
5V ± 5%
3.3V ± 5%
Available Frequency Stabilities over Operating Temperature Ranges
Code
A
C
D
F
Temperature Range
0°C to 50°C
0°C to 70°C
-20°C to 70°C
-40°C to 85°C
200 ppb
∗
∗
∗
∗
100 ppb
∗
∗
∗
50 ppb
∗
∗
20 ppb
∗
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-497-6377 • www.valpeyfisher.com • RevE1208
2
VFT8S
OCXO Ultra Low Power
DIL8 Compatible, CMOS / TTL
Absolute Maximum Ratings
Parameter
Supply
Break Down
Voltage
Storage
Temperature
Control
Voltage
Symbol
Vcc
Ts
Vc
Condition
Min
-0.5
-40
-1
Typ
Max
+13.0
+85
9
Unit
V
°C
V
Note
Environmental and Mechanical
Parameter
Mechanical Shock
Vibration
Soldering Conditions
Hermetic Seal
Specification
Per MIL-STD-202, 30G, 11ms
Per MIL-STD-202, 5G to 2000Hz
260°C for 10s max
Leak rate less than 1x10
-8
atm.ccm/s of helium, TO-8 only
Vcc
Ø0.500(12,7mm)
0.395 (10,0mm)
Vc
0.1K
Vref
8
1
5
2
4
Output
0.25 (6,35mm) MIN
Ø0.018 (0,45mm)
0.300 (7,62mm)
0.48 (12,2mm)
0.600 (15,2mm)
10K
8
1
2
4
0.100 (2,54mm)
8
1
2
4
0.300 (7,62mm)
5
5
0.670 (17,0mm)
Ø0.580(14,3mm)
SMD Version
Pin Connections
Pin #
1
2
4
5
8
Connection
Vc
Vref
GND
Output
Vcc
Outline Drawing
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-497-6377 • www.valpeyfisher.com • RevE1208
3
