Vectron International 267 Lowell Road, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
VVC1/VVC2
Voltage Controlled Crystal Oscillator
The VVC1 Voltage Controlled Crystal Oscillator
Features
VCXO with a CMOS output
Small 5.0 X 7.0 X 1.8 mm package
Output frequencies to 66 MHz
5.0 or 3.3 V operation
Low Jitter < 6 pS rms, f
o
>12MHz
Tri-State Output for test and board debug
0/70 or 40/85
C operating temperature
Hermetically sealed ceramic SMD package
Product is compliant to RoHS directive
and fully compatible with lead free assembly
Applications
SONET/SDH/DWDM
Ethernet, Gigabit Ethernet
xDSL/PCMCIA cards
Digital Video
Broadband Access
Description
Vectron's VVC1 Voltage Controlled Crystal
Oscillator (VCXO) is a quartz stabilized square
wave generator with a CMOS output and is tested
at CMOS and TTL (5.0 volt operation) logic levels.
The VVC1 uses fundamental crystals resulting in
low jitter performance and a monolithic IC which
improves reliability and reduces cost.
Vc
f
O
Output
Buffer /
Tri-state
Input
Buffer
ESD Diodes
VVC1 Voltage Controlled Crystal Oscillator
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Performance Characteristics
Table 1. Electrical Performance
Parameter
Symbol
Min
Typical
Maximum
Units
Frequency
f
O
1.544
65.536
MHz
Supply Voltage
1
(+5.0 V)
(+3.3 V)
V
DD
4.750
3.135
5.0
3.3
5.250
3.465
V
Supply Current (+5.0 V)
(+3.3 V)
I
DD
55
40
mA
Output Logic Levels
Output Logic High
2
Output Logic Low
2
V
OH
V
OL
0.9*V
DD
0.1V
DD
V
V
Transition Times
Rise Time
2
Fall Time
2
t
R
t
F
5
5
ns
ns
Symmetry or Duty Cycle
3
SYM
45
50
55
%
Operating temperature (ordering option)
0/70 or 40/85
C
Total Pull Range (ordering option)
Or
Absolute Pull Range
50, 100 or 150
50, 80 or 100
ppm
Test Conditions for APR (+5V option)
V
C
0.5
4.5
V
Test Conditions for APR (+3.3V option)
V
C
0.3
3.0
V
Gain Transfer (See Figure 3)
Positive
ppm/V
Control Voltage Leakage Current
I
VCXO
1
uA
Control Voltage Bandwidth (-3dB)
BW
10
kHz
Package Size
5.0 x 7.0 x 1.8
mm
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.
2. Figure 1 defines these parameters. Figure 2 illustrates the equivalent five gate TTL load and operating conditions under which
these parameters are tested and specified.
3. Symmetry is defined as (ON TIME/PERIOD with Vs= 1.4 V for TTL and Vs=2.5 V for CMOS, 5 volt operation, and Vs=1.65V
for 3.3 Volt operation.
Figure 1. Output Waveform
Figure 2. Typical Output Test Conditions (25
5C)
80
%
Vs
20
%
t
F
t
R
Period
On Time
+
-
+
-
I
C
V
C
4
3
.
1
F
.01
F
15pF
2
5
6
1
I
D D
650
V
DD
1.8k
VVC1 Voltage Controlled Crystal Oscillator
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
A
E
C
D
B
G
F
J
L
I
K
H
Outline Diagram, Pad Layout and Pin Out
Inch/[mm}
Pin #
Symbol
Function
1
V
C
Control Voltage
2
NC or Tri-state
No Connect or Tri-state
3
GND
Ground
4
f
O
Output Frequency
5
Tri-state or NC
Logic low disables output
Logic high or no connection enables output waveform
6
V
DD
Supply Voltage
Tape and Reel
Tape and Reel Dimensions (mm)
Tape Dimensions
Reel Dimensions
# Per
Product
A
B
C
D
E
F
G
H
I
J
K
L
Reel
VVC1
12
5.5
1.5
4
8
1.78
20.6
13
55
6
12.4
178
500
VVC1 Voltage Controlled Crystal Oscillator
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional
operation is not implied at these or any other conditions in excess of conditions represented in the
operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods may
adversely affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Power Supply
V
DD
6
Vdc
Storage Temperature
Tstorage
-55/125
C
Voltage Control Range
V
C
Gnd to V
DD
V
Figure 3. Typical Frequency Pull versus Control Voltage, 35.328MHz Output, 3.3 Volt S
upply
-200.0
-150.0
-100.0
-50.0
0.0
50.0
100.0
150.0
200.0
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
2.70
3.00
Control Voltage (volts)
Frequency Pull (ppm)
VVC1 Voltage Controlled Crystal Oscillator
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Reliability
The VVC1 is capable of meeting the following qualification tests.
Table 3. Environnemental Compliance
Parameter
Conditions
Mechanical Shock
MIL-STD-883 Method 2002
Mechanical Vibration
MIL-STD-883 Method 2007
Solderability
MIL-STD-883 Method 2003
Gross and Fine Leak
MIL-STD-883 Method 1014
Resistance to Solvents
MIL-STD-883 Method 2016
Handling Precautions
Although ESD protection circuitry has been designed into the the VVC1, proper precautions should be taken
when handling and mounting. VI employs a Human Body Model and a Charged-Device Model (CDM) for
ESD susceptibility testing and design protection evaluation. ESD thresholds are dependent on the circuit
parameters used to define the model. Although no industry wide standard has been adopted for the CDM, a
standard HBM of resistance = 1.5kohms and capacitance = 100pF is widely used and therefore can be
used for comparison purposes.
Table 4. ESD Ratings
Model
Minimum
Conditions
Human Body Model
1500
MIL-STD-883 Method 3115
Charged Device Model
1000
JESD 22-C101
Suggested IR profile
Devices are built using lead free epoxy and can also be subjected to standard lead free IR reflow conditions.
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