75 South Street, Hopkinton, MA 01748 800-982-5737 508-435-6831 Fax: 508-435-5289 www.valpeyfisher.com
79
V C X O
VF940-T Series
VF940T Series
HCMOS/TTL Compatible
Tristate VCXO
F E AT U R E S
Fundamental Crystal Design
Hermetically Sealed Package
Wide Pulling Range
Low Cost
0.300"
(7,62mm)
0.600"
(15,24mm)
0.200"
(2,54mm)
GLASS STANDOFFS
0.0180"
(0,460mm)
0.800"
(20,32mm)
0.497"
(12,62mm)
#1
#7
#8
#14
#3
#12
0.250"
(6,35mm)
0.187"
*
(4,75mm)
VALPEYFISHER
VF940-T
77.76MHZ
BO1H
Creating a Part Number
VF940
LEAD CONFIGURATION
Code
Specification
G
Gull Wing
Through Hole (std.)
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
5%
10% (std.)
FREQUENCY STABILITY
Code
Specification
S
20 ppm
25 ppm
FREQ.
T
Example: VF940H-1TG-75-77.76MHz: Frequency Stability
25ppm, Duty Cycle
5.%, Input Voltage 5.0 Volt
5%, Operating Temperature -40
C to +85
C,
Tristate, Gull Wing, APR
75ppm, Frequency 77.76MHz.
Parameter
Symb
Condition
Min
Typ
Max
Unit
Note
Input Break
Vcc
0.5
7.0
V
Down Voltage
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
@Vc = 2.5V
10
KHz
@3db
Input Impedance
fm<10KHz
50
KOhm
Absolute
APR
Overall
50
ppm
2
Pull Range
Deviation Slope
Monotonic,
50
ppm/V Vcc = 5.00
positive
75
Vcc = 3.3V
Linearity 20
%
3
Setability (Vc
Vc0
@25C, Fnom.
2.00
2.50
3.00
V
Std.
for center freq)
1.25
1.65
2.05
LV opt.
Tristate Function
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 #3Tristate Control
Pin #7Ground, Case
Pin #8Output
Pin #12N/C
Pin #14Vcc
10 TTL gates or 50pF MAX, AC coupled 50 Ohm termination
recommended for F>52MHz
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.
All specifications are subject to change without notice.
All dimensions are typical unless otherwise specified.
*Wide APR may require taller pkg.
Input HIGH (>2.5V) or floating: ACTIVE
Input LOW (<0.5V): INFINITE IMPEDANCE
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