VF9 4 0
V
C X O
VF940
HCMOS/TTL Compatible
VCXO
F E AT U R E S
Pa ra m e te r
Sy m b
Co n d itio n
Min
Ty p
Ma x
Un it
N o te
Input Break
• Fundamental Crystal Design
• Very Low Phase Jitter
• Extremely Wide Pulling Range
available
Down Voltage
Storage Temp.
Control Voltage
Vcc
Ts
–0.5
–40
–1
7.0
+85
9
V
°C
V
Vc
Frequency
Range
F
1.54
200
±25
MHz
ppm
• Low Cost
Frequency
Stability
∆F/ F
vs. Temp., Vcc
No Load
Input Voltage
Vcc
Icc
4.75
3.15
5.00
3.30
5.25
3.45
V
Std.
LV opt.
VALPEY FISHER
Input Current
Load
20
mA
@20MHz
VF940
34.368MHZ
BO1H
0.497"
(12,62mm)
10 TTL gates or 50pF MAX, AC coupled 50 Ohm termination
recommended for F>54MHz
Duty Cycle
@1.4V
40
50
60
%
1
0.800"
(20,32mm)
Rise/ Fall Time
Tr/ Tf
20% to 80%
6
3
ns
F<54MHz
F>54MHz
0.187" *
(4,75mm)
Logic “1” Level
Logic “0” Level
Start–up Time
Phase Jitter
Voh
Vol
Ts
Max Load
Max Load
0.9Vcc
0.1Vcc
0.250"
(6,35mm)
2
10
1
ms
ps
ø0.0180"
(0,460mm)
1σ
fj>1KHz
@–3db
GLASS STANDOFFS
#1
Modulation BW
Input Impedance
fm
@Vc2.5V
fm<10KHz
Overall
10
50
KHz
KOhm
ppm
#7
#8
Absolute
Pull Range
APR
±50
2
0.300"
(7,62mm)
Deviation Slope
Monotonic,
positive
50
±75
ppm/ V Vcc=5.0V
Vcc=3.3V
#14
Linearity
±20
%
V
3
0.600"
(15,24mm)
Setability (Vc
for center freq)
Vc0
@25°C, Fnom.
2.00
1.25
2.50
1.65
3.00
2.05
4
LV opt.
All dimensions are typical unless otherwise specified.
*Wide APR may require taller pkg.
Operating
Temperature Range
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.
Creating a Part Number
Mechanical Shock
Thermal Shock
Vibration
FREQ.
VF940
ABSOLUTE PULL RANGE (ppm)
FREQUENCY STABILITY
Code
Specification
±50 ppm MIN. (std.)
up to 1000 ppm MAX.
Code
S
Specification
Soldering Conditions
Hermetic Seal
Pin Out
±20
ppm
XXXX
(std.)
(customer specified)
Leak rate less than 5 x 10–8 atm.cc/ s of helium
LEAD CONFIGURATION
DUTY CYCLE
Code
G
Specification
Gull Wing
Through Hole (std.)
Pin #1–Voltage Control
Pin #8–Output
Pin #7–Ground, Case
Pin #14–Vcc
Code
H
Specification
50 ±5%
50 ±10% (std.)
OPERATIONAL TEMP. RANGE
INPUT VOLTAGE
Notes:
Code
1
Specification
0°C to +70°C (std.)
-40°C to +85°C
Code
L
Specification
3.3 Volt ±5%
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.
5.0 Volt ±5% (std.)
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.
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.
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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