VTD3 series
Voltage Controlled Temperature Compensated Crystal Oscillator
Features
•
CMOS Output
•
Output Frequencies to 61.440 MHz
•
Fundamental Crystal Design
•
Optional VCXO function available
•
Product is compliant to RoHS directive
Applications
•
Wireless Communications
The VTD3, VCTCXO
•
Base Stations
•
Point to point radios
•
Broadband Access
•
Test Equipment
Description
Vectron’s VTD3 Temperature Compensated
Crystal Oscillator (TCXO) is a quartz stabilized,
CMOS squarewave, temperature compensated
oscillator, operating off either 3.3 or 5.0 volt
supply.
Vectron International 267 Lowell Road, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTD3 Data sheet
Performance Characteristics
Table 1. Electrical Performance
Parameter
Frequency
Supply Voltage
Maximum Supply Voltage
Supply Current,
Output Frequency<22MHz
Output Frequency=>22MHz
Output Level
2
Logic High
Logic Low
Drive High
Drive Low
Output Load
Duty Cycle, @ 50%
Control Voltage Impedance
Control Voltage to reach pull, 5V option
3.3 V option
Pull Range
Ordering option, see last page
Temperature Stability
Ordering option, see last page.
Initial Accuracy, “No Adjust” option
Power Supply Stability
Load Stability
Aging
Operating temperature
Ordering option, see last page
Phase Noise, 10.000MHz
10 Hz offset
100 Hz offset
1 kHz offset
10 kHz offset
100 kHz offset
Start-up time
Symbol
f
O
Min
10.000
Maximum
61.440
3.3V±5%, 5V±5%
7
15
24
V
OH
V
OL
I
OH
I
OL
0.9*V
DD
0.1*V
DD
-4
4
15pf
40/60
Z
Vc
100
0.5
0.3
±5, ±8, ±10, ±15
±1.0 to ±5.0
4.5
3.0
%
Kohm
V
ppm
ppm
Typical
Units
MHz
V
DC
mA
I
DD
V
V
mA
mA
TPR
±2.0
ppm
±1.0
ppm
±0.3
ppm
±1.0
ppm/year
0/55, -10/60, -20/70, -30/75, -40/85
°C
dBc/Hz
-107
-138
-148
-152
-154
10
ms
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.
2. Output is DC coupled.
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTD3 Data sheet
VCXO Functional Description
VCXO Feature:
The VTD3 can be ordered with a VCXO function for applications where it will be used in
a PLL, or the output frequency needs fine tune adjustments. This is high impedance input, 100 kohm, and
can be driven with an op-amp or terminated with adjustable resistors etc.
Pin 1 should not be left
floating
on the VCXO optional devices.
“No Adjust” Feature:
In applications where the VTD3 will not be used in a PLL, or the output frequency
does not need fine tune adjustments, the fixed TCXO/VTD3-x0xx is the best option. By using the “no
adjust” option, the circuit is simplified as Vc does not need to adjusted or set to a predetermined voltage.
Pin 1 can be grounded to reduce the risk of adding noise into the circuit.
Outline Diagrams, Pad Layout and Pin Out
Table 2. Pinout
Pin #
Symbol
1
N/C
or
V
C
2
GND
3
f
O
4
V
DD
Function
No Connect (VTD3-x0xx) or VCXO Control Voltage
Electrical and Case Ground
Output Frequency
Supply Voltage
VTD3
VTD3-XXXX
Frequency
Date Code
2.0 mm
(max)
Figure 1, Package
drawing and Pad Layout
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTD3 Data sheet
Tape and Reel
Table 3. Tape and Reel Dimensions (mm)
Tape Dimensions
Product
A
VTD3
24
B
11.5
C
1.5
D
4
E
12
Reel Dimensions
F
G
H
2
21
13
I
80
J
2
K
25.5
L
255
# Per
Reel
1K
J
F
D
A
E
C
G
B
L
I
H
K
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 4. Absolute Maximum Ratings
Parameter
Symbol
Storage Temperature
Tstorage
Ratings
-40/85
Unit
°C
Reliability
The VTD3 qualification tests have included:
Table 5. Environnemental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Gross and Fine Leak
Resistance to Solvents
Conditions
MIL-STD-883 Method 2002
MIL-STD-883 Method 2007
MIL-STD-883 Method 1010
MIL-STD-883 Method 2003
MIL-STD-883 Method 1014
MIL-STD-883 Method 2015
Handling Precautions
Although ESD protection circuitry has been designed into the VTD3, proper precautions should be taken
when handling and mounting. VI employs a Human Body Model and a Charged-Device Model (CDM) for
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTD3 Data Sheet
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 6. ESD Ratings
Model
Human Body Model
Charged Device Model
Minimum
1000
500
Conditions
MIL-STD-883 Method 3015
JESD 22-C101
Suggested IR profile
Table 7 shows max temperatures and lower peak temperatures can also be used e.g. peak temperature
of 230-240°C. The VTD3 should not be subjected to a wash process that will immerse it in solvents – a
no clean process is recommended.
Table 7. Reflow Profile
Parameter
PreHeat Time
Ramp Up
Time Above 217
o
C
Time To Peak Temperature
Time At 260
o
C (max)
Time At 240 °C (max)
Ramp Down
Symbol
t
S
R
UP
t
L
t
AMB-P
t
P
t
p2
R
DN
Value
60 sec Min, 180 sec Max
3
o
C/sec Max
60 sec Min, 150 sec Max
480 sec Max
6 sec Max
60 sec Max
6
o
C/sec Max
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
5
e-mail vectron@vectron.com
PCB Design
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