VCC6-Q/R Series 2.5 and 3.3 volt LVPECL

VCC6-Q/R Series
2.5 and 3.3 volt LVPECL Crystal Oscillator
Features
• 2.5 or 3.3V LVPECL
• 3rd Overtone Crystal for best jitter performance
• Output frequencies to 270 MHz
• 0.2pS rms jitter, 12kHz-20MHz,155.52MHz
• 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
Applications
The VCC6 Crystal Oscillator
• SONET/SDH/DWDM
• Fiber Channel
• Ethernet, Gigabit Ethernet
Enable/Disable
• Storage Area Network
• Digital Video
• Broadband Access
OUT
OUT
Output
Buffer /
Disable
Description
Vectron’s VCC6 Crystal Oscillator (XO) is quartz
stabilized square wave generator with a LVPECL output, operating off a 2.5 or 3.3 volt
supply.
The VCC6 uses 3rd overtone crystals for
frequencies under 200MHz, resulting in low jitter
performance, typically 0.2pS rms in the 12 kHz
to 20MHz band for a 155.52MHz output, which
is three times better than competing PLL
solutions.
Vectron International 267 Lowell Road, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: [email protected]
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
Performance Characteristics
Table 1. Electrical Performance
Parameter
Frequency
Supply Voltage1, 3.3V Q option
2.5V R option
Supply Current
Output Logic Levels, 0/70°C
Output Logic High2
Output Logic Low2
Symbol
fO
VDD
Typical
3.3
2.5
IDD
Output Logic Levels, -40/85°C
Output Logic High2
Output Logic Low2
Transition Times
Rise Time2
Fall Time2
Symmetry or Duty Cycle3
Operating temperature (ordering option)
Stability (ordering option)4
Jitter, 12kHz to 20MHz5
Min
10
3.15
2.375
Units
MHz
V
mA
VOH
VOL
VDD-1.025
VDD-1.810
VDD-0.880
VDD-1.620
V
V
VOH
VOL
VDD-1.085
VDD-1.830
VDD-0.880
VDD-1.555
V
V
45
600
600
55
ps
ps
%
°C
ppm
pS
tR
tF
SYM
TOP
deltaF/F
50
-10/70 or –40/85
±20, ±25, ±50 or ±100
0.7
0.2
Cycle to Cycle, rms
4.8
Cycle to Cycle, peak-peak
38
Period Jitter, rms
Period Jitter, peak-peak
Output Enabled6
Output Disabled6
Output Enable/Disable time
Enable/Disable Leakage Current
Output Enable Pull-Up Resistor6
Output Enabled
Output Disabled
Maximum
270
3.45
2.625
98
2.7
23
VIH
VIL
tE/D
IIL
0.7*VDD
0.3*VDD
200
±200
33
1
V
V
nS
uA
Kohm
Mohm
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-155M520 using an Agilent E5052A for phase noise and LeCroy 8600, 25K samples for jitter.
6. Output will be enabled if Enable/Disable is left open. The pull resistor changes to a higher value, operating in a “power saving mode” when
Enable/Disable is set to a logic 0.
tF
tR
80 %
Vs
20 %
On Time
Period
Figure 1. Output Waveform
Vectron International 267 Lowell Rd, Hudson NH 03051
Figure 2. Typical Output Test Conditions (25±5°C)
Tel: 1-88-VECTRON-1
e-mail: [email protected]
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
Outline Diagram and Pin Out
Table 2. VCC6-QAx Pinout
Pin #
Symbol
1
NC
2
E/D
3
GND
4
fO
5
Cfo
6
VDD
Function
This pin has no internal connection and is floating.
Enable/Disable Function
Ground
Output Frequency
Complementary Output Frequency
Supply Voltage
Table 3. VCC6-QCx Pinout
Pin #
Symbol
1
E/D
2
NC
3
GND
4
fO
5
Cfo
6
VDD
Function
Enable/Disable Function
This pin has no internal connection and is floating.
Ground
Output Frequency
Complementary Output Frequency
Supply Voltage
Gold over Nickel plating
Figure 3 Optional Package Drawing
Gold over Nickel plating
Figure 4 Package Drawing
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: [email protected]
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
Terminating PECL Outputs
The VCC6 incorporates a standard PECL output scheme, which are un-terminated emitters as shown in
Figure 5. There are numerous application notes on terminating and interfacing PECL logic and the two
most common methods are a single resistor to ground, Figure 6, and a pull-up/pull-down scheme as
shown in Figure 7. 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 5. Standard PECL Output Configuration
Figure 6. Single Resistor Termination
Resistor value are typically:
120 to 240ohms for 3.3V
82 to 120 ohms for 2.5V
Vectron International 267 Lowell Rd, Hudson NH 03051
Figure 7. Pull-up Pull-down Termination
Resistor values are typically:
130 and 82 ohms for 3.3V
240 and 62 ohms for 2.5V
Tel: 1-88-VECTRON-1
e-mail: [email protected]
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
Enable/Disable Functional Description
Under normal operation the Enable/Disable is left open, or set to a logic high state, and the VCC6 is in
oscillation mode and outputs are enabled (active). 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.
Power Saving Pull-Up Resistor
The E/D pull-up resistor changes in response to the input logic level; the pull-up resistor is a large value
when E/D is set to a logic low, which reduces the current consumed. When E/D is open, or set to a logic
high, the pull-up resistance becomes a smaller value which helps decrease the effects of external noise.
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
Power Supply
VDD
Enable/Disable
VIN
Storage Temperature
Tstorage
Ratings
-0.5 to +7.0
-0.5 to VDD+0.5
-55/125
Unit
Vdc
Vdc
°C
Reliability
The VCC6 qualification tests included:
Table 5. Environnemental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Solderability
Gross and Fine Leak
Resistance to Solvents
Moisture Sensitivity Level
Conditions
MIL-STD-883 Method 2002
MIL-STD-883 Method 2007
MIL-STD-883 Method 2003
MIL-STD-883 Method 1014
MIL-STD-883 Method 2016
MSL1
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 3115
Charged Device Model
1000
JESD22-C101
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: [email protected]
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
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 maximum parameters are
listed in Table 7, lower temperatures are also acceptable. The VCC6 is hermetically sealed so an
aqueous wash is not an issue.
Table 7. Reflow Profile (IPC/JEDEC J-STD-020B)
Parameter
Symbol
PreHeat Time
tS
Ramp Up
R UP
Time Above 217 oC
tL
Time To Peak Temperature
t AMB-P
Time At 260 oC (max)
tP
Time At 240°C (max)
tp2
Ramp Down
R DN
Value
60 sec Min, 200 sec Max
3 oC/sec Max
60 sec Min, 150 sec Max
480 sec Max
10 sec Max
60 sec MAX
6 oC/sec Max
Figure 8. IR Reflow Diagram
Figure 9. Pad Size Diagram
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: [email protected]
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
Tape and Reel
J
F
G
C
D
B
A
L
I
E
H
K
Figure 10. Tape and Reel Diagram
Table 8. Tape and Reel Dimensions (mm)
Tape Dimensions
Product
A
VCC6
16
B
C
D
E
7.5
1.5
4
8
Vectron International 267 Lowell Rd, Hudson NH 03051
Reel Dimensions
F
G
H
2
21
13
Tel: 1-88-VECTRON-1
I
J
K
L
60
2
17
180
e-mail: [email protected]
# Per
Reel
250
VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator
Table 9. Standard Frequencies (MHz)
19.440
40.000
64.000
80.000
98.304
125.000
136.000
156.000
160.160
166.6286
171.000
195.3125
27.000
40.680
64.375
83.125
100.000
130.000
143.000
156.250
161.1328
166.6667
173.3707
200.000
27.027
48.000
74.1758
87.000
105.000
130.5882
145.221
156.256
163.235
166.67
175.000
212.500
35.000
50.000
74.250
90.000
106.000
133.000
150.000
156.260
164.3555
167.00
180.000
250.000
37.000
52.300
76.800
91.875
106.250
134.560729
153.500
159.375
165.000
167.3316
187.500
260.000
38.880
62.500
77.760
93.000
110.000
135.000
155.520
160.000
166.000
168.200912
190.000
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: 125M00= 125.000
Supply Voltage, Output
Stability Options/Temperature
Q=3.3V, LVPECL
A: ±100ppm
-10 to 70°C
R=2.5V, LVPECL
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 option over -10/70°C 3.3V, VCC6-107-frequency, is also available
A ±20ppm option over -10/70°C 2.5V, VCC6-110-frequency, is also available.
For Additional Information, Please Contact:
www.vectron.com
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
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/R (REVISION DATE: April 15, 2008)
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: [email protected]