V C X O
VF940
75 South Street, Hopkinton, MA 01748 800-982-5737 508-435-6831 Fax: 508-435-5289 www.valpeyfisher.com
108
VF940
HCMOS/TTL Compatible
VCXO
F E AT U R E S
Fundamental Crystal Design
Very Low Phase Jitter
Extremely Wide Pulling Range
available
Low Cost
0.800"
(20,32mm)
0.300"
(7,62mm)
#1
#7
#8
#14
0.600"
(15,24mm)
GLASS STANDOFFS
0.497"
(12,62mm)
0.187"
*
(4,75mm)
0.0180"
(0,460mm)
VALPEY FISHER
VF940
34.368MHZ
BO1H
0.250"
(6,35mm)
Creating a Part Number
VF940
INPUT VOLTAGE
Code
Specification
L 3.3
Volt
5%
5.0
Volt
5% (std.)
OPERATIONAL TEMP. RANGE
Code
Specification
0
C to +70
C (std.)
1 -40
C to +85
C
ABSOLUTE PULL RANGE (ppm)
Code
Specification
50 ppm MIN. (std.)
XXXX
up to 1000 ppm MAX.
(customer specified)
DUTY CYCLE
Code
Specification
H 50
5%
50
10% (std.)
FREQUENCY STABILITY
Code
Specification
S
20 ppm
(std.)
FREQ.
Example: VF940SHL-1G-100-34.368MHz: Frequency Stability
20ppm,
Duty Cycle
5%, Input Voltage 3.3 Volt
5%, Operating Temperature
-40
C to +85
C, Gull Wing, APR
100ppm, Frequency 34.368MHz.
LEAD CONFIGURATION
Code
Specification
G
Gull Wing
Through Hole (std.)
Parameter
Symb
Condition
Min
Typ
Max
Unit
Note
Input Break
Down Voltage
Vcc
0.5
7.0
V
Storage Temp.
Ts
40
+85
C
Control Voltage
Vc
1
9
V
Frequency
Range
F
1.54
200
MHz
Frequency
F/F
vs. Temp., Vcc
25
ppm
Stability
Input Voltage
Vcc
4.75
5.00
5.25
V
Std.
3.15
3.30
3.45
LV opt.
Input Current
Icc
No Load
20
mA
@20MHz
Load
Duty Cycle
@1.4V
40
50
60
%
1
Rise/Fall Time
Tr/Tf
20% to 80%
6
ns
F<54MHz
3
F>54MHz
Logic "1" Level
Voh
Max Load
0.9Vcc
Logic "0" Level
Vol
Max Load
0.1Vcc
Startup Time
Ts
2
10
ms
Phase Jitter
1
1
ps
fj>1KHz
Modulation BW
fm
@Vc2.5V
10
KHz
@3db
Input Impedance
fm<10KHz
50
KOhm
Absolute
APR
Overall
50
ppm
2
Pull Range
Deviation Slope
Monotonic,
50
ppm/V
Vcc=5.0V
positive
75
Vcc=3.3V
Linearity 20
%
3
Setability (Vc
Vc0
@25C, Fnom.
2.00
2.50
3.00
V
4
for center freq)
1.25
1.65
2.05
LV opt.
Operating
Temperature Range
0C to +70C (40C to +85C available)
Mechanical Shock
Per MILSTD202, Method 213, Cond. E
Thermal Shock
Per MILSTD883, Method 1011, Cond. A
Vibration
Per MILSTD883, Method 2007, Cond. A
Soldering Conditions
260C, for 10s, Max.
Hermetic Seal
Leak rate less than 5 x 10
8
atm.cc/s of helium
Pin Out
Pin #1Voltage Control
Pin #7Ground, Case
Pin #8Output
Pin #14Vcc
10 TTL gates or 50pF MAX, AC coupled 50 Ohm termination
recommended for F>54MHz
Absolute
Max. Ratings
Electrical
Environmental and Mechanical
Electrical
Connections
Notes:
1. 5% symmetry available, contact factory for tighter requirements.
2. Up to 1,000 ppm pull range available at some frequencies.
3. 10% and 5% linearity available.
4. 0 to 5V control voltage available for Vcc 3.3V. Nominal control voltage
is 2.5V and setability is 0.5V in this case.
5. For tristate option see VF940T series.
All specifications are subject to change without notice.
All dimensions are typical unless otherwise specified.
*Wide APR may require taller pkg.
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