Vectron International 267 Lowell Road, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
VCC6-Q Series
3.3 volt LVPECL Crystal Oscillator, Output Frequencies > 270MHz
The VCC6 Crystal Oscillator
Features
• 3.3V LVPECL
• Output frequencies from 270 to 800 MHz
• Enable/Disable for test and board debug
• -10/70 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
• Fiber Channel
• Ethernet, Gigabit Ethernet
• Storage Area Network
• Digital Video
• Broadband Access
Description
Vectron’s VCC6 Crystal Oscillator (XO) is quartz
stabilized square wave generator with a LV-PECL
output, operating off a 3.3 volt supply.
OUT
Output
Buffer /
Disable
Enable/Disable
OUT
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
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 fO 270 800 MHz
Supply Voltage 1 , VDD 3.15 3.45 V
Supply Current IDD 100 mA
Output Logic Levels, -10/70°C
Output Logic High2
Output Logic Low2
VOH
VOL
VDD-1.025
VDD-1.810
VDD-0.880
VDD-1.620
V
V
Output Logic Levels, -40/85°C
Output Logic High2
Output Logic Low2
VOH
VOL
VDD-1.085
VDD-1.830
VDD-0.880
VDD-1.555
V
V
Transition Times
Rise Time2
Fall Time2
tR
tF
600
600
ps
ps
Symmetry or Duty Cycle3 SYM 45 50 55 %
Operating temperature (ordering option) TOP -10/70 or –40/85 °C
Stability (ordering option)4 deltaF/F
±20, ±25, ±50 or ±100 ppm
Jitter, 12kHz to 20MHz5
Period RMS Jitter
Period p/p Jitter
2
4
30
ps
Output Enabled6 VIH 0.7*VDD V
Output Disabled6 VIL 0.3*VDD V
Enable/Disable Leakage Current IIL ±200 uA
Output Enable Pull-Up Resistor6 100
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible and terminated to ground.
2. Figure 1 defines these parameters. Figure 2 illustrates the operating conditions under which these parameters are tested and specified.
3. Symmetry is measured defined as On Time/Period.
4. Includes calibration tolerance, operating temperature, supply voltage variations, aging (40 degreesC/10 years) and shock and vibration (not under
operation).
5. Measurements made on a VCC6-QAB-622M080 using a LeCroy 8600, 25K samples.
6. Output will be enabled if Enable/Disable is left open.
Figure 1. Output Waveform Figure 2. Typical Output Test Conditions (25±5°C)
80%
Vs
20%
t
F
t
R
Period
On Time
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Table 2. VCC6-QAx Pinout
Pin # Symbol Function
1 NC This pin has no internal connection and is floating.
2 E/D Enable/Disable Function
3 GND Ground
4 fO Output Frequency
5 Cfo Complementary Output Frequency
6 VDD Supply Voltage
Table 3. VCC6-QCx Pinout
Pin # Symbol Function
1 E/D Enable/Disable Function
2 NC This pin has no internal connection and is floating.
3 GND Ground
4 fO Output Frequency
5 Cfo Complementary Output Frequency
6 VDD Supply Voltage
Contact pads are Gold over Nickel plating
Figure 3. VCC6-QCx Package Drawing
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Terminating PECL Outputs
The VCC6 incorporates a standard PECL output scheme, which are un-terminated emitters as shown in
Figure 4. There are numerous application notes on terminating and interfacing PECL logic and the two most
common methods are a single resistor to ground, Figure 5, and a pull-up/pull-down scheme as shown in
Figure 6. An AC coupling capacitor is optional, depending on the application and the input logic
requirements of the next stage.
One of the most important considerations is terminating the Output and Complementary Outputs equally.
An unused output should not be left un-terminated, and if it one of the two outputs is left open it will result in
excessive jitter on both. PC board layout must take this and 50 ohm impedance matching into account.
Load matching and power supply noise are the main contributors to jitter related problems.
Figure 4. Standard PECL Output Configuration
Figure 5. Single Resistor Termination Figure 6. Pull-up Pull-down Termination
Resistor value are typically: Resistor values are typically:
120 to 240ohms for 3.3V 130 and 82 ohms for 3.3V
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Enable/Disable Functional Description
Under normal operation the Enable/Disable is left open, or set to a logic high state, and the VCC6 is
oscillating. When the E/D is set to a logic low, the oscillator stops and the both the output and
complementary outputs are in a high impedance state. This helps facilitate board testing and
troubleshooting.
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
Power Supply VDD -0.5 to +4.6 Vdc
Enable/Disable VIN -0.5 to VDD+0.5 Vdc
Storage Temperature Tstorage -55/125 °C
Reliability
The VCC6 qualification tests included:
Table 5. 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 VCC6, 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 3015
Charged Device Model 1500
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
IR Reflow and Suggested Pad Size Layout
The VCC6 has been 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 Table 7.
The VCC6 is hermetically sealed so an aqueous wash is not an issue.
Table 7. Reflow Profile (IPC/JEDEC J-STD-020B)
Parameter Symbol Value
PreHeat Time t S 60 sec Min, 200 sec Max
Ramp Up R UP 3 oC/sec Max
Time Above 217 oC t L 60 sec Min, 150 sec Max
Time To Peak Temperature t AMB-P 480 sec Max
Time At 260 oC (max) t P 10 sec Max
Ramp Down R DN 6 oC/sec Max
Figure 7. IR Reflow Diagram
Figure 8. Pad Size Diagram
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
A
E
CD
B
GFJ
LI
KH
Tape and Reel
Figure 9. Tape and Reel Diagram
Table 8. Tape and Reel Dimensions (mm)
Tape Dimensions Reel Dimensions # Per
Product A B C D E F G H I J K L Reel
VCC6 16 7.5 1.5 4 8 2 21 13 60 2 17 180 250
VCC6-Q 3.3v LVPECL Crystal Oscillator, Output Frequencies > 270MHZ
Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
Table 9. Frequencies (MHz)
311.040 312.500 320.000 322.2656 332.000
333.000 350.000 400.000 446.000 472.000
500.000 600.000 622.080 625.000 644.5313
666.5413 669.3236 693.3265 693.4829 693.750
700.000 779.5686
Other frequencies may be available upon request. Standard frequencies are frequencies which the crystal
has been designed and does not imply a stock position.
Ordering Information
VCC6 – Qxx – xxxMxx
Product Family Frequency MHz
Crystal Oscillator example: 625M00= 625.000MHz
Supply Voltage, Output Stability Options/Temperature
Q=3.3V, PECL A: ±100ppm -10 to 70°C
B: ±50ppm -10 to 70°C
Enable/Disable C: ±100ppm -40 to 85°C
A: E/D is on Pin 2, Pin 1 is a NC D: ±50ppm -40 to 85°C
C: E/D is on Pin 1, Pin 2 is a NC E: ±25ppm -10 to 70°C
F: ±25ppm -40 to 85°C
NOTE: Not all combinations of options are available.
A +/-20ppm over -10/70°C, VCC6-107-frequency, is also available.
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Vectron International reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is assumed
as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
VCC6-Q 270Mhz (REVISION DATE: September7, 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
