VF940–T Series
Tristate
VCXO,
3.3V or 5.0V
12.62 x 20.32 mm, HCMOS/TTL
Features
Wide pull range – up to
1,000ppm
for some
frequencies
Fundamental crystal design
Hermetically sealed package
RoHS Status
Electrical Specifications
Parameter
Frequency
Range
Frequency
Stability
Operating
Temperature
Supply Voltage
Supply Current
Load
Duty Cycle
Rise & Fall
Times
Output Levels
Start-up Time
Phase Jitter
T
R
/T
F
V
OH
V
OH
T
S
1
Symbol
F
∆F/F
T
V
CC
I
CC
No load
Vs. Operating
Temperature, V
CC
-40
4.75
3.15
5.0
3.3
20
Condition
Min
1.54
Typ
Max
200
25
+85
5.25
3.45
Unit
MHz
ppm
C
V
mA
@ 20MHz
Note
10 TTL gates or 50 pF max., AC coupled 50 Ohms termination
recommended for F > 52MHz
@ 1.4V
20% to 80%
Max load
Max load
2
0.9 V
CC
0.1 V
CC
10
1
ms
ps
fj > 1kHz
40
50
60
6
3
%
ns
Note 1
F < 54MHz
F > 54MHz
Note 1:
±5% symmetry available, contact factory for tighter requirements.
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-497-6377 • www.ctsvalpey.com • RevB0613
Specifications are subject to change without notice
1
VF940–T Series
Tristate
VCXO,
3.3V or 5.0V
12.62 x 20.32 mm, HCMOS/TTL
Electrical Specifications
Parameter
Modulation
Bandwidth
Input
Impedance
Absolute Pull
Range
Deviation Slope
Linearity
Setability
(V
C
for center
frequency)
V
C
0
@ 25C, F
NOM
2.00
1.25
2.50
1.65
APR
Symbol
fm
Condition
@ V
C
= 2.5V
fm < 10kHz
Overall
Monotonic, positive
Min
10
50
±50
±50
±75
±20
3.00
2.05
Typ
Max
Unit
kHz
kOhm
ppm
ppm/V
%
V
Note 2
5.0V
3.3V
Note 3
Standard
LV Option
Note
@ -3dB
Note 2:
Up to ±1,000 ppm pull range available at some frequencies.
Note 3:
±10% and ±5% linearity available.
Note 4:
0 to 5V control voltage available for V
CC
3.3V. Nominal control voltage is 2.5V and setability is ±0.5V
in this case.
Absolute Maximum Ratings
Parameter
Input Break
Down
Voltage
Storage
Temperature
Control
Voltage
Symbol
V
CC
T
S
V
C
Condition
Min
-0.5
-40
-1
Typ
Max
+7.0
+85
+9
Unit
V
C
V
Note
Environmental and Mechanical Conditions
Parameter
Mechanical Shock
Thermal Shock
Vibration
Soldering Conditions
Hermetic Seal
Marking
Condition
MIL STD 202, Method 213, Condition E
MIL STD 883, Method 1011, Condition A
MIL STD 883, Method 2007, Condition A
260C, for 10s max
Leak rate less than 5x10
-8
atm.cc/s of helium
Epoxy ink or laser engraved
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-497-6377 • www.ctsvalpey.com • RevB0613
Specifications are subject to change without notice
2
VF940–T Series
Tristate
VCXO,
3.3V or 5.0V
12.62 x 20.32 mm, HCMOS/TTL
Pin Assignments
Pin #
Connection
Package
1
3
7
8
12
14
V
CONTROL
Tristate
Ground, Case
Output
N/C
V
CC
Marking Specification
Model Number
VF940-T
77.76MHz
YWWx
Pin 1
Date Code
Manufacturer’s Code
How to Order
VF940
Stability
Code
Specification*
S
±20 ppm
±25 ppm
*Old code A is ±25 ppm.
See new code above.
Duty Cycle
Code
Specification
H
±5%
±10% (std.)
—
T
—
—
FREQUENCY, MHz
Supply Voltage
Code Specification
L
3.3V
5.0V (std.)
Operating
Temperature Range
Code
Specification
0°C to +70°C
(std.)
1
-40°C to +85°C
Lead Configuration
Code
Specification
G
Gull Wing
Through Hole
(std.)
Absolute Pull Range
Code
Specification
±50 ppm min.
(std.)
Up to ±1,000
XXXX
ppm max.
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-497-6377 • www.ctsvalpey.com • RevB0613
Specifications are subject to change without notice
3
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