Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 1 of 7 Rev: 25Apr05
VS-550
Dual Frequency VCSO
Features
• 9 x 14 x 3.5 mm Package
• Output Frequencies from 500 MHz to 850 MHz
• 3.3 V Operation
• Low Jitter < 0.25 ps-rms across 50 kHz to 80 MHz
• LV-PECL Configuration with Fast Transition Times
• Complementary Outputs
• Frequency Select Feature
Applications
PLL circuits for Clock Smoothing and Frequency Translation
Description Standard
• 10G Fibre Channel INCITS 364-2003
• 10GbE LAN / WAN IEEE 802.3ae
• OC-192 ITU-T G.709
• SONET / SDH GR-253-CORE Issue3
Description
The VS-550 is a SAW based voltage controlled oscillator that
operates at the fundamental frequencies of the internal SAW
filters. These SAW filters are high-Q quartz devices that
enable the circuit to achieve low phase jitter performance over
a wide operating temperature range. The dual oscillator is
housed in a hermetically sealed J-lead surface mount package
offered on tape and reel. It has a frequency select function
that enables either “Frequency 1” or “Frequency 2.”
FSVc Gnd
OutputCOutputVcc
SAW 1
SAW 2
VS-550 Voltage Controlled SAW Oscillator
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 2 of 7 Rev: 25Apr05
Electrical Performance
Parameter Symbol Minimum Typical Maximum Units Notes
Frequency
Nominal Frequency
Absolute Pull Range
Linearity
Gain Transfer (See Pg 5)
Temperature Stability
Transition Time
fN
APR
Lin
KV
fSTAB
±50
500 - 850
±5
+385
±100
4
MHz
ppm
%
ppm/V
ppm
µsec
1,2,3
1,2,3,8
2,4,8
2,8
1,6
6
Supply
Voltage
Current (No Load)
VCC
ICC
2.97
3.3
55
3.63
70
V
mA
2,3
3
Outputs
Mid Level
Swing
Current
Rise Time
Fall Time
Symmetry
Spurious Suppression
Jitter (See Pg 5)
IOUT
tR
tF
SYM
φJ
VCC-1.4
550
45
50
VCC-1.3
650
250
250
50
60
0.135
VCC-1.2
950
20
400
400
55
0.250
V
mV-pp
mA
ps
ps
%
dBc
ps-rms
2,3
2,3
6
5,6
5,6
2,3
6
6,7
Control Voltage
Input Impedance
Modulation Bandwidth
Zc
BW
100
500
kΩ
kHz
6
6
Operating Temperature TOP -40 85 °C 1,3
Package Size 9.0 x 14.0 x 3.5 mm
1. See Standard Frequencies and Ordering Information (Pg 7).
2. Parameters are tested with production test circuit below (Fig 1).
3. Parameters are tested at ambient temperature with test limits guardbanded for specified operating temperature.
4. Measured as the maximum deviation from the best straight-line fit, per MIL-0-55310.
5. Measured from 20% to 80% of a full output swing (Fig 2).
6. Not tested in production, guaranteed by design, verified at qualification.
7. Integrated across 50 kHz to 80 MHz, per GR-253-CORE Issue3.
8. Tested with Vc = 0.3V to 3.0V.
Figure 1. Test Circuit Figure 2. 10K LV-PECL Waveform
Vcc - 1.6V
Vcc - 1.3V
Vcc - 1.0V
80%
20%
SYM = 100 x t
A
/
t
B
tR t
F
tA
tB
25
50Ω50Ω
Test Circui t Notes:
1) To Permit 50Ω Measurement of Outputs, all DC Inputs are Biased Down 1.3V.
2) All Voltage Sources Contain Bypas s Ca pac itors to Minimize Sup ply Noi se .
3) 50Ω Terminations are Within Test Eq uip m en t.
Vc (-1.0V to +1.7V)
F1 (-0.58V), F2 (+0.59 V )
Vee (-1.3V)
Vcc (+2V)
COutput
Output
16
34
VS-550 Voltage Controlled SAW Oscillator
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 3 of 7 Rev: 25Apr05
Outline Diagram Pad Layout
Pin Out Control Logic (LV-CMOS)
Pin Symbol Function FS Operation
1 VC VCSO Control Voltage 0 F1
2 FS Frequency Select (See Control Logic) 1 F2
3 GND Case and Electrical Ground
4 Output VCSO Output
5 COutput VCSO Complementary Output
6 VCC Power Supply Voltage (3.3 V ±10%)
Tape and Reel (EIA-481-2-A)
Tape Dimensions (mm) Reel Dimensions (mm)
Dimension W F Do Po P1 A B C D N W1 W2 # Per
Tolerance Typ Typ Typ Typ Typ Typ Min Typ Min Min Typ Max Reel
VS-550 24 11.5 1.5 4 12 330 1.5 13 20.2 100 24.4 30.4 200
Po
W A
N
F
P1 W1
W2
C
B
D
ØDo
8.89±0.15
[0.350±0.006]
13.97 ± 0.20
[0.550±0.008]
0.46±0.05
[0.018±0.002]
2.54±0.13
[0.100±0.005]
5.08±0.13
[0.200±0.005]
3.42+0.20
-0.30
[0.135+0.008
-0.012 ]
mm
[inch]
( 7.63
[0.300])
VS-550-LFF-GNN
XXX.XXX-XXX.XXX
VI YWW
1
4
3
6
2
5
mm
[inch]
8.80
[0.346]
1.27
[0.050]
2.54
[0.100]
5.08
[0.200]
3.00
[0.118]
VS-550 Voltage Controlled SAW Oscillator
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 4 of 7 Rev: 25Apr05
Absolute Maximum Ratings
Parameter Symbol Ratings Unit
Power Supply VCC 0 to 6 V
Input Current IIN 100 mA
Output Current IOUT 25 mA
Voltage Control Range VC 0 to VCC V
Storage Temperature TSTR -55 to 125 °C
Solder Temperature / Duration TPEAK / tP 260 / 40 °C / sec
Stresses in excess of the absolute maximum ratings can permanently damage the device. Also, exposure to
these absolute maximum ratings for extended periods may adversely affect device reliability. Functional
operation is not implied at these or any other conditions in excess of those represented in the operational
sections of this datasheet. Permanent damage is also possible if any device input (Vc or FS) draws greater
than 100mA.
Suggested Output Load Configurations
LV-PECL to LV-PECL: For short transmission lengths, the power
consumption could be reduced by removing the 100Ω resistor and
doubling the value of the pull down resistors.
Functional Test: Allows standard power supply configuration.
Since AC coupled, the LV-PECL levels cannot be measured.
LV-PECL to LVDS: Restricted for short transmission lengths.
Configuration may require modification depending on LVDS receiver.
40Ω40Ω
150Ω150Ω
49Ω49Ω
+3.3V
Production Test: Allows direct DC coupling into 50Ω measurement
equipment. Must bias the power supplies as shown. Similar to Figure 1.
0.01 µF
0.01 µF
16
2
34
5
Vc
FS
Gnd
+3.3V
0.01 µF
0.10 µF
Vcc
COutput
240Ω
Output
240Ω
100Ω
Z = 50Ω
Z = 50Ω
Output
Gnd 34 Z = 50Ω
+3.3V
0.10 µF
FS
Vc 61
25
COutput
Vcc
0.01 µF
Z = 50Ω
Gnd
FS
Vc
43 Output
240Ω
16
25COutput
Vcc
0.01 µF
+3.3V
0.10 µF
240Ω
-1.3V
FS
Vc
34
61
25
COutput
Output
Vcc
+2.0V
0.01 µF
0.10 µF
VS-550 Voltage Controlled SAW Oscillator
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 5 of 7 Rev: 25Apr05
y = 393.01x - 555.91
y = 371.69x - 531.82
-800
-600
-400
-200
0
200
400
600
800
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
Control Voltage (V)
Freque ncy (PPM)
622 Vc Pull
644 Vc Pull
Linear (622 Vc Pull)
Linear (644 Vc Pull)
-155
-150
-145
-140
-135
-130
-125
-120
-115
-110
-105
-100
-95
10 100 1,000 10,000 100,000
Offset (kHz)
L(f) (dBc/Hz)
OC-192 Spec
F1 = 622.0800
F2 = 644.5313
1/
f
3
1/
f
2
1/
f
1
OC-192 Spec Equivalent to
0.25 ps-rms @ 500 MHz
Typical Characteristics
At Ambient (22.5°C)
Typical Gain Transfer @ 622.0800 = +393 ppm/V
T
yp
ical Gain Transfer
@
644.5313 = +372
pp
m/V
Typical Calculated Jitter @ Vc = 1.65V
SONET OC-48 (12kHz-20MHz) = 0.239 ps-rms; 1.67 ps-pp
SONET OC-192
(
50kHz-80MHz
)
= 0.135 ps-rms; 0.95 p s-p p
VS-550 Voltage Controlled SAW Oscillator
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 6 of 7 Rev: 25Apr05
The device 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. The temperatures refer to
the topside of the package, measured on the
package body surface. The VS-550 device is
hermetically sealed so an aqueous wash is not an
issue.
25
217
200
150
260
Temperature (DegC)
Time (sec)
t S
t AMB-P
t L
t P
R UP
R DN
Reliability
VI qualification includes aging at various extreme temperatures, shock and vibration, temperature cycling, and
IR reflow simulation. The VS-550 family is capable of meeting the following qualification tests:
Environmental 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 VS-550 proper precautions should be taken when
handling and mounting. VI employs a human body model (HBM) and a charged-device model (CDM) for ESD
susceptibility testing and design protection evaluation.
ESD Ratings
Model Minimum Conditions
Human Body Model 1500 V MIL-STD 883, Method 3015
Charged Device Model 1000 V JEDEC, JESD22-C101
Reflow Profile (IPC/JEDEC J-STD-020C)
Parameter Symbol Value
PreHeat Time t S 60 sec Min, 180 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 t P 20 sec Min, 40 sec Max
Ramp Down R DN 6 oC/sec Max
VS-550 Voltage Controlled SAW Oscillator
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 Website: www.vectron.com
Page 7 of 7 Rev: 25Apr05
Standard Frequencies (MHz)
622.0800 P2 625.0000 P3 644.5313 P4 657.4219 PB 666.5143 P5 669.3266 R3
672.1627 R5 690.5692 R4 693.4830 R6
1. For other frequencies, we recommend the VS-751, p l ease co ntact VI for details.
2. Frequency 1 must be lower than Frequency 2. Not all combinations are available.
Ordering Information
VS - 550 - L F F - H N N – P2 – P4
For Additional Information, Please Contact:
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.
Product Family
VS: VCSO
Package
550: 9 x 14 x 3.5 mm
Input
L: 3.3 V
Output
F: LV-PECL
Operating Temperature
F: -40 to 85 °C
Frequency 1
P2 – R3
Other (Future Use)
N: N/A
Other (Future Use)
N: N/A
Absolute Pull Range
G: +/- 50 ppm
H: +/- 100 ppm
Frequency 2
P3 – R6
USA: Vectron International, 267 Lowell Rd, Hudson, NH 03051 . . . . Tel: 1-88-VECTRON-1 Fax: 1-888-FAX-VECTRON
EUROPE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: +49 (0) 3328-4784-17 Fax: +49 (0) 3328-4784-30
ASIA: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: +86-21-28909740 Fax: +86-21-28909240
