VF194/294 Series
V C X O
VF194/VF294 Series
HCMOS/TTL Hybrid VCXO
Surface Mount Ceramic Package
Tristate Output Standard
F E AT U R E S
Parameter
Absolute
Max. Ratings
Symb
Vcc
Ts
Vc
F
∆F/F
Vcc
Icc
Condition
Min
–0.5
–55
–1
1.5
Typ
Max
7.0
+125
9
160
±25
Unit
V
°C
V
MHz
ppm
V
mA
Note
Very Low Phase Jitter
•
Industrial Temperature Range
•
High Reliability
•
Wide Frequency Range
•
Miniature Package
•
3.3V supply available
•
0.303"
(7,7mm)
VF294
155.520MHz
BO1H
Input Break
Down Voltage
Storage Temp.
Control Voltage
Frequency
Range
Frequency
Stability
Input Voltage
Input Current
vs. Temp., Vcc
4.75
3.15
No load
10 TTL gates or 50pF
@1.4V
40
50
5.00
3.30
5.25
3.45
30
Standard
LV Opt.
1
0.206"
(5,2mm)
Load
Duty Cycle
Rise/Fall Time
Tr/Tf
Voh
Vol
Ts
1σ, F<52 MHz
1σ, F>52 MHz
fm
@Vc = 2.5V
fm<10KHz
Vc
APR
Vcc = 5.0V
Vcc = 3.3V
Overall
Monotonic,
positive
60
6
4
%
ns
V
2
5
0.090"
(2,29mm)
0.045"
(1,143mm)
1
0.050"
(1,27mm)
6
2
5
3
4
0.100"
(2,54mm)
0.200"
(5,08mm)
Electrical
20% to 80%
0.4V to 2.4V
Max Load
Max Load
2
0.9Vcc
Logic “1” Level
Logic “0” Level
Start–up Time
Phase Jitter
Modulation BW
Input Impedance
Control Voltage
Absolute
Pull Range
Deviation Slope
0.1Vcc
10
1
20
10
50
0
0
±50
50
±20
5.0V
3.3V
V
ms
ps
KHz
KOhm
V
ppm
ppm/V
%
V
Vcc = 5.0V
Vcc = 3.3V
4
3
fj>1KHz
@–3db
All dimensions are typical unless otherwise specified.
Creating a Part Number
VF194/294
FREQUENCY STABILITY
Code
S
FREQ.
ABSOLUTE PULL RANGE (ppm)
Linearity
Setability (Vc
for center freq)
Tristate
Function
Enable/
Disable Time
Operating
Temperature Range
Environmental
and Mechanical
Code
XXX
Specification
Specify Deviation MIN.
Specification
±20
ppm
(std.)
Vc0
(MAX.
±100
PPM)
@25°C,
Fnominal
2.00
1.25
2.50
1.65
3.00
2.05
OPERATIONAL TEMP. RANGE
Code
DUTY CYCLE
Code
H
Specification
0°C to +70°C (std.)
-40°C to +85°C
Input HIGH (>2.5V) or floating:
Input LOW (<0.5V):
ACTIVE
INFINITE IMPEDANCE
100
ns
Specification
±5%
±10%
(std.)
1
INPUT VOLTAGE
Code
L
Specification
3.3 Volt
±5%
5.0 Volt
±5%
(std.)
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
230°C, for 90s, Max.
Leak rate less than 5 x 10
–8
atm.cc/s of helium
Pin #1–Voltage Control
Pin #2–N/C (194) Tristate (294)
Pin #3–Ground, Case
Pin #4–Output
Pin #5–Tristate (194), N/C (294) Pin #6–Vcc
Example: VF194-1-100-77.76MHz: Frequency Stability
±25ppm,
Duty Cycle
±10%,
Input Voltage 5.0 Volt
±5%,
Operating Temperature -40°C to +85°C,
Absolute Pull Range (ppm)
±100min.
Output Tristate Control Pin #5,
Frequency 77.76MHz.
Mechanical Shock
Thermal Shock
Vibration
Soldering Conditions
Hermetic Seal
Electrical
Connections
Notes:
1. Current is frequency and load dependent.
2. Tighter duty cycle available.
3. ±100ppm available at some frequencies. ±32ppm for some
frequencies at 3.3V is the only option.
4. 0–5V control voltage available for Vcc 3.3V. Nominal control
voltage is 2.5V and setability is ±0.5V in this case.
5. For higher frequency Tr/Tf is shorter.
Pin Out
All specifications are subject to change without notice.
90
75 South Street, Hopkinton, MA 01748
800-982-5737
508-435-6831
Fax: 508-435-5289 www.valpeyfisher.com
DSP and ARM Processors
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