VF940
V C X O
VF940
HCMOS/TTL Compatible
VCXO
F E AT U R E S
Parameter
Absolute
Max. Ratings
Symb
Vcc
Ts
Vc
F
∆F/F
Vcc
Icc
Condition
Min
–0.5
–40
–1
1.54
Typ
Max
7.0
+85
9
200
±25
Unit
V
°C
V
MHz
ppm
V
mA
Note
Fundamental Crystal Design
•
Very Low Phase Jitter
•
Extremely Wide Pulling Range
available
•
Low Cost
•
Input Break
Down Voltage
Storage Temp.
Control Voltage
Frequency
Range
Frequency
Stability
Input Voltage
vs. Temp., Vcc
4.75
3.15
No Load
5.00
3.30
20
5.25
3.45
Std.
LV opt.
@20MHz
0.497"
(12,62mm)
VALPEY FISHER
VF940
34.368MHZ
BO1H
0.800"
(20,32mm)
0.187"
*
(4,75mm)
Input Current
Load
Duty Cycle
Rise/Fall Time
Electrical
10 TTL gates or 50pF MAX, AC coupled 50 Ohm termination
recommended for F>54MHz
@1.4V
Tr/Tf
Voh
Vol
Ts
1σ
fm
@Vc2.5V
fm<10KHz
APR
Overall
Monotonic,
positive
10
50
±50
50
±75
±20
Vc0
@25°C, Fnom.
2.00
1.25
2.50
1.65
3.00
2.05
20% to 80%
Max Load
Max Load
2
0.9Vcc
0.1Vcc
10
1
ms
ps
KHz
KOhm
ppm
ppm/V
%
V
2
Vcc=5.0V
Vcc=3.3V
3
4
LV opt.
fj>1KHz
@–3db
40
50
60
6
3
%
ns
1
F<54MHz
F>54MHz
Logic “1” Level
Logic “0” Level
Start–up Time
Phase Jitter
Modulation BW
ø0.0180"
(0,460mm)
GLASS STANDOFFS
#1
0.300"
(7,62mm)
#14
0.600"
(15,24mm)
#8
#7
0.250"
(6,35mm)
Input Impedance
Absolute
Pull Range
Deviation Slope
Linearity
Setability (Vc
for center freq)
Operating
Temperature Range
Environmental
and Mechanical
All dimensions are typical unless otherwise specified.
*Wide APR may require taller pkg.
Creating a Part Number
0°C to +70°C (–40°C to +85°C available)
Per MIL–STD–202, Method 213, Cond. E
Per MIL–STD–883, Method 1011, Cond. A
Per MIL–STD–883, Method 2007, Cond. A
260°C, for 10s, Max.
Leak rate less than 5 x 10
–8
atm.cc/s of helium
Pin #1–Voltage Control
Pin #8–Output
Pin #7–Ground, Case
Pin #14–Vcc
Mechanical Shock
Thermal Shock
Vibration
Soldering Conditions
Hermetic Seal
VF940
FREQUENCY STABILITY
Code
S
FREQ.
ABSOLUTE PULL RANGE (ppm)
Code
Specification
Specification
±20
ppm
(std.)
±50
ppm MIN. (std.)
XXXX
up to 1000 ppm MAX.
(customer specified)
DUTY CYCLE
Code
H
LEAD CONFIGURATION
Code
G
Specification
50
±5%
50
±10%
(std.)
Specification
Gull Wing
Through Hole (std.)
INPUT VOLTAGE
Code
L
OPERATIONAL TEMP. RANGE
Electrical
Connections
Pin Out
Specification
3.3 Volt
±5%
5.0 Volt
±5%
(std.)
Code
1
Specification
0°C to +70°C (std.)
-40°C to +85°C
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.
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.
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 VF940–T series.
All specifications are subject to change without notice.
108
75 South Street, Hopkinton, MA 01748
800-982-5737
508-435-6831
Fax: 508-435-5289 www.valpeyfisher.com
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