Vectron International: 267 Lowell Road, Suite 102, 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 a
2.8, 3.0, 3.3 or 5.0 volt supply.
VTC4 Data Sheet
Vectron International: 267 Lowell Rd, Suite 102, 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
10.000 27.000 MHz
Typical Supply Voltage
1
Ordering option, see last page
2.8, 3.0, 3.3 or 5.0 V
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
2
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 ppm
Temperature Stability
Ordering option, see last page.
±0.5 to ±5.0 ppm
Initial Accuracy, “No Adjust” option ±0.5 ±1.0 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.
2. Output is DC coupled
.
VTC4 Data Sheet
Vectron International: 267 Lowell Rd, Suite 102, 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, Suite 102, 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 where 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 where the VTC4 will not be used in a PLL, or the output frequency
does not fine tune adjustments, the best device to use would be a VTC4-x0xx. 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 GND or
V
C
Ground for a VTC4-x0xx option
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
Devices will be marked with the frequency
Figure 3, Package drawing
VTC4 Data Sheet
Vectron International: 267 Lowell Rd, Suite 102, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
A
E
C
D
B
G
F
J
LI
KH
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
Table 5. Environmental 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
Moisture Sensitivity Level 1
Contact Pads Gold over Nickel
VTC4 Data Sheet
Vectron International: 267 Lowell Rd, Suite 102, 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 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, 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-020)
Parameter Symbol Value
PreHeat Time t
S
60 sec Min, 180 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, Suite 102, 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 19.6608 19.680 19.800 20.000 21.250
23.104 24.000 24.5535 24.576 25.000 25.600 26.000 27.456
VTC4 - -
Product Family Output Frequency (MHz)
TCXO, 5x3.2
Voltage Options Temperature Options
A: +5.0 Vdc ±5%, Clipped Sine Output A: 0 to 55°C
B: +3.3 Vdc ±5%, Clipped Sine Output B: -10 to 60°C
C: +3.0 Vdc ±5%, Clipped Sine Output C: -20 to 70°C
D: +2.8 Vdc ±5%, Clipped Sine Output D: -30 to 80°C
E: -40 to 85°C
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
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 range 5: ±5.0ppm
www.vectron.com
Feb 26, 2014
For Additional Information, Please Contact:
USA: Vectron International • 267 Lowell Road, Suite 102, 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 International • 68 Yin Cheng Road (C), 22
nd
Floor,
One LuJiaZui, Pudong, Shanghai 200120, China
•Tel: 8621 61946886 • Fax: 8621 61946699
B
0 C 12M8000000 2
