V-Type
Voltage Controlled Crystal Oscillator
Features
•
Output frequencies to 80.000 MHz
•
5.0 or 3.3 V operation
•
Tri-State Output
•
Low jitter < 6ps rms
•
VCXO with CMOS outputs
•
APR to 100 ppm
•
0/70 or –40/85
°C
temperature range
•
Hermetically sealed ceramic SMD package
The V-Type Voltage Controlled Crystal Oscillator
Product is compliant to RoHS directive
and fully compatible with lead free assembly
Applications
•
SONET/SDH
•
DWDM
ESD Diodes
•
xDSL/PCMCIA cards
•
Digital Video
Vc
Input
Buffer
Output
Buffer /
Tri-state
f
O
Description
Vectron’s V-Type 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 V-Type’s small footprint and low profile
make it ideally suitable for PCMCIA applications
as well as any other where size is limited but
performance is required.
Vectron International 267 Lowell Road, Hudson NH 03051
Tel:1-88-VECTRON-1
e-mail: vectron@vectron.com
V-Type Voltage Controlled Crystal Oscillator
Performance Characteristics
Table 1. Electrical Performance
Parameter
Frequency
Supply Voltage
1
(+3.3 V)
(+5.0 V)
Supply Current
Output Logic Levels
Output Logic High
2
Output Logic Low
2
Transition Times
Rise Time
2
Fall Time
2
Tristate
Output Enabled
Output Disabled
Duty Cycle
3
(ordering option)
Operating temperature (ordering
option)
Test Conditions for APR (+5V option)
Test Conditions for APR (+3.3V option)
Absolute Pull Range (ordering
option)
Symbol
f
O
V
DD
I
DD
V
OH
V
OL
t
R
t
F
V
IN
V
IL
SYM
V
C
V
C
APR
Min
1.024
2.97
4.5
Typical
3.3
5.0
12
Maximum
80.000
3.63
5.5
25
Units
MHz
V
mA
V
V
ns
ns
V
V
%
°C
V
V
ppm
0.9*V
DD
0.1V
DD
1
1
2.5
0.7
40/60 or 45/55
0/70 or –40/85
0.5
0.3
±50
±70
±80
±100
Positive
4.5
3.0
3
3
Gain Transfer (See Figure 3)
Control Voltage Leakage Current
Control Voltage Bandwidth (-3dB)
Phase Noise
10 Hz Offset
100 Hz Offset
1 KHz Offset
10 KHz Offset
100 KHz Offset
1 MHz Offset
Package Size
I
VCXO
BW
±1
10
-55
-85
-115
-142
-148
-151
7.49 x 5.08 x 1.8
ppm/V
uA
kHz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
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.
t
R
80
%
t
F
I
DD
6
V
DD
+
-
2
5
3
650Ω
Vs
20
%
On Time
Period
.
1µF
.01µF
I
C
V
C
1
+
-
4
15pF
1.8k
Figure 1. Output Waveform
Figure 2. Typical Output Test Conditions (25±5°C)
Vectron International 267 Lowell Road, Hudson NH 03051
Tel:1-88-VECTRON-1
e-mail: vectron@vectron.com
V-Type Voltage Controlled Crystal Oscillator
Outline Diagram, Pad Layout and Pin Out
Pin #
1
2
3
4
5
6
Symbol
V
C
Tri-state or N/C
(ordering option)
GND
f
O
Tri-state or N/C
(ordering option)
V
DD
Function
Control Voltage
Logic low disables output
Logic high or no connection enables output waveform
Ground
Output Frequency
Logic low disables output
Logic high or no connection enables output waveform
Supply Voltage
Tape and Reel
J
F
D
A
E
C
G
B
L
I
H
K
Tape and Reel Dimensions (mm)
Tape Dimensions
Product
A
B
C
D
E
V-Type
16
7.5
1.55
4
8
Reel Dimensions
F
G
H
1.78
20.6
13
I
55
J
6
K
12.4
L
178
# Per
Reel
500
Vectron International 267 Lowell Road, Hudson NH 03051
Tel:1-88-VECTRON-1
e-mail: vectron@vectron.com
V-Type Voltage Controlled Crystal Oscillator
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
Power Supply
V
DD
Storage Temperature
Tstorage
Voltage Control Range
V
C
Ratings
6
-55/125
0 to V
DD
Unit
Vdc
°C
V
200.0
150.0
100.0
Frequency Pull (ppm)
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)
Figure 3. Typical Frequency Pull Versus Control Voltage, 35.328MHz Output, 3.3 Volt
S
upply
Vectron International 267 Lowell Road, Hudson NH 03051
Tel:1-88-VECTRON-1
e-mail: vectron@vectron.com
V-Type Voltage Controlled Crystal Oscillator
Reliability
The V-Type is capable of meeting the following qualification tests.
Table 3. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Solderability
Gross and Fine Leak
Resistance to Solvents
MIL-STD-883
MIL-STD-883
MIL-STD-883
MIL-STD-883
MIL-STD-883
Conditions
Method 2002
Method 2007
Method 2003
Method 1014
Method 2016
Handling Precautions
Although ESD protection circuitry has been designed into the the V-Type, 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
Human Body Model
Charged Device Model
Minimum
1500
1000
Conditions
MIL-STD-883 Method 3115
JESD 22-C101
The V-Type is qualified to meet the JEDEC standard for Pb-Free assembly. The temperatures and time
intervals listed are based on the Pb-Free small body requirements and parameters are listed in the table
below. The contact pads are gold over nickel so lower IR reflow temperatures such as 220°C can be
used (device is backwards compatible with a lead solder assembly).
The V-Type is hermetically sealed so an aqueous wash is not an issue.
Table 5. Reflow Profile (IPC/JEDEC J-STD-020C)
Parameter
Symbol
PreHeat Time
Ramp Up
Time Above 217 C
Time To Peak Temperature
Time At 260 C
Ramp Down
o
o
Value
60 sec Min, 180 sec Max
3 C/sec Max
60 sec Min, 150 sec Max
480 sec Max
20 sec Min, 40 sec Max
6 C/sec Max
o
o
t
S
R
UP
t
L
t
AMB-P
t
P
R
DN
260
t
L
R
UP
t
P
R
DN
Temperature (DegC)
217
200
150
t
S
t
AMB-P
25
Time (sec)
Vectron International 267 Lowell Road, Hudson NH 03051
Tel:1-88-VECTRON-1
e-mail: vectron@vectron.com
Microchip MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
