Vectron International 267 Lowell Road, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
VTC4 series
Voltage Controlled Temperature Compensated Crystal Oscillator
The VTC4, VCTXCO
Features
Clipped Sine Wave Output
Output Frequencies to 27 MHz
Fundamental Crystal Design
Optional VCXO Function available
Gold over nickel contact pads
Hermetically Sealed Ceramic SMD package
Product is compliant to RoHS directive
and fully compatible with lead free assembly
Applications
Wireless Communications
Base Stations
Point to point radios
Broadband Access
Test Equipment
Handsets
Description
Vectron's VTC4 Temperature Compensated
Crystal Oscillator (TCXO) is a quartz stabilized,
clipped sine wave output, temperature
compensated oscillator, operating off either 2.8,
3.0, 3.3 or 5.0 volt supply.
VTC4 Data Sheet
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Performance Characteristics
Table 1. Electrical Performance for the Clipped Sine Wave Output Option
Parameter
Symbol
Min
Typical Maximum
Units
Frequency
f
O
10.000
27.000
MHz
Typical Supply Voltage
Ordering option, see last page
2.8V, 3.0V, 3.3V or 5.0V
Supply Current
10.000 MHz to < 15.000 MHz
15.000 MHz to 27.00 MHz
I
DD
1.5
2.0
mA
Output Level
Vp/p
0.8
V
Output Load
10K II 10pf
Control Voltage Impedance
Z
Vc
1
Mohm
Control Voltage to reach pull
All options (5.0, 3.3,3.0 and 2.8V)
0.5
2.5
V
Pull Range
Ordering option, see last page
TPR
5, 8, 10, 15 or 20
ppm
Temperature Stability
Ordering option, see last page.
0.5 to 5.0
ppm
Initial Accuracy, "No Adjust" option
0.5
ppm
Power Supply Stability
0.2
ppm
Load Stability
0.2
ppm
Aging
1.0
ppm/year
Operating temperature
Ordering option, see last page
0/55, -10/60, -20/70, -30/80, -40/85
C
Phase Noise, 12.800MHz
10 Hz offset
100 Hz offset
1 kHz offset
10 kHz offset
100 kHz offset
5MHz offset
-89
-113
-137
-150
-155
-156
dBc/Hz
Start-up time
2
ms
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.
VTC4 Data Sheet
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Figure 1. Typical Phase Noise Plot
Figure 2. Clipped Sine Wave Output
VTC4 Data Sheet
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
VCXO Functional Description
VCXO Feature: The VTC4 can be ordered with a VCXO function for applications were it will be used in a
PLL, or the output frequency needs fine tune adjustments. This is a high impedance input, 1 Mohm, 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 were the VTC4 will be not be used in a PLL, or the output frequency
does not fine tune adjustments, the best device to use would be a VTC4-x0xxx. By using the "no adjust"
option, the circuit is simplified as Vc does not need to adjusted or set to a predetermined voltage and pin 1
should be grounded (pin 1 can be left open but should not be set to a voltage such as the supply).
Outline Diagrams, Pad Layout and Pin Out
Table 2. Pinout
Pin #
Symbol
Function
1
N/C or
V
C
No Connect (VTC4-x0xx)
or VCXO Control Voltage
2
GND
Electrical and Case Ground
3
f
O
Output Frequency
4
V
DD
Supply Voltage
NOTE: Additional pads are used to program and adjust the TCXO during manufacturing and should be left
open; do not terminate these to the supply voltage. Some designs do not include these additional pads.
Contact Pads are gold over nickel
Figure 3, Package drawing
VTC4 Data Sheet
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
Tape and Reel
Table 3. Tape and Reel Dimensions (mm)
Tape Dimensions
Reel Dimensions
# Per
Product
A
B
C
D
E
F
G
H
I
J
K
L
Reel
VTC4
16
7.5
1.5
4
8
1.5
20.2
13
60
2
16.4
180
1000
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
Ratings
Unit
Storage Temperature
Tstorage
-55/125
C
Reliability
The VTC4 qualification tests have included:
Table 5. Environnemental Compliance
Parameter
Conditions
Mechanical Shock
MIL-STD-883 Method 2002
Mechanical Vibration
MIL-STD-883 Method 2007
Temperature Cycle
MIL-STD-883 Method 1010
Solderability
MIL-STD-883 Method 2003
Gross and Fine Leak
MIL-STD-883 Method 1014
Resistance to Solvents
MIL-STD-883 Method 2015
VTC4 Data Sheet
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail vectron@vectron.com
6
Handling Precautions
Although ESD protection circuitry has been designed into the the VTC4, 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 6. ESD Ratings
Model
Minimum
Conditions
Human Body Model
1000
MIL-STD-883 Method 3115
Charged Device Model
1500
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,
Table 7 shows max temperatures and lower temperatures can also be used e.g. peak temperature of 220C.
Table 7. Reflow Profile (IPC/JEDEC J-STD-020B)
Parameter
Symbol
Value
PreHeat Time
t
S
150 sec Min, 200 sec Max
Ramp Up
R
UP
3
o
C/sec Max
Time Above 217
o
C
t
L
60 sec Min, 150 sec Max
Time To Peak Temperature
t
AMB-P
480 sec Max
Time At 260
o
C (max)
t
P
10 sec Max
Time At 240 C (max)
t
p2
60 sec Max
Ramp Down
R
DN
6
o
C/sec Max
VTC4 Data Sheet
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail vectron@vectron.com
7
Ordering Information
Table 8. Standard Frequency List
10.000
12.504
12.800
13.000
13.568
14.000
14.31818
14.4844
14.7456
15.000
16.000
16.325291
16.367667
16.396
16.800
17.500
18.414
19.200
19.440
19.680
19.800
20.000
21.250
23.104
24.000
24.5535
25.000
25.600
27.456
VTC4 -
-
Product Family
Output Frequency
TCXO, 5x3.2
In MHz
Voltage Options
Temperature Options
A: +5.0 Vdc 5%, Clipped Sine Output
A: 0 to 55C
B: +3.3 Vdc 5%, Clipped Sine Output
B: -10 to 60C
C: +3.0 Vdc 5%, Clipped Sine Output
C: -20 to 70C
D: +2.8 Vdc 5%, Clipped Sine Output
D: -30 to 80C
E: -40 to 85C
Pulling Range
0: Fixed TCXO, no adjust
Stability Options
1: 5ppm
A: 0.5ppm
2: 8ppm
1: 1.0ppm
3: 10ppm
B: 1.5ppm
4: 15ppm
2: 2.0ppm
5: 20ppm
C: 2.5ppm
3: 3.0 ppm
Note: Not all combinations are available:
D: 3.5ppm
0.5 ppm is available over 0/ 55 C, and on a case by case basis for -10/60C. 4: 4.0ppm
1.0 ppm to 5.0 ppm is available on all temperature ranges
5: 5.0ppm
www.vectron.com
December 29, 2005
For Additional Information, Please Contact:
USA: Vectron International
267 Lowell Road, Hudson, NH 03051
Tel: 1-88-VECTRON-1
Fax: 1-888-FAX-VECTRON
EUROPE: Landstrasse, D-74924, Neckarbischofsheim, Germany
Tel: 49 (0) 7268 8010
Fax: 49 (0) 7268 801281
ASIA:
Vectron Asia Pacific Sales 1F~2F. No.8 Workshop No.308 Fenju Rd.,
WaiGaoQiao Free Trade Zone, Pudong New Area Shanghai, China 200131
Tel: 8621 50480777 Fax: 8621 50481881
B
B
0
C
12M800
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