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
•
10G Fibre Channel
•
10GbE LAN / WAN
•
OC-192
•
SONET / SDH
Standard
INCITS 364-2003
IEEE 802.3ae
ITU-T G.709
GR-253-CORE Issue3
Vcc
COutput
Output
Description
SAW 1
SAW 2
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.”
FS
Gnd
Vc
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 1 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 25Apr05
VS-550 Voltage Controlled SAW Oscillator
Electrical Performance
Parameter
Frequency
Nominal Frequency
Absolute Pull Range
Linearity
Gain Transfer (See Pg 5)
Temperature Stability
Transition Time
Supply
Voltage
Current (No Load)
Outputs
Mid Level
Swing
Current
Rise Time
Fall Time
Symmetry
Spurious Suppression
Jitter (See Pg 5)
Control Voltage
Input Impedance
Modulation Bandwidth
Operating Temperature
Package Size
1.
2.
3.
4.
5.
6.
7.
8.
Symbol
f
N
APR
Lin
K
V
f
STAB
Minimum
Typical
500 - 850
Maximum
Units
MHz
ppm
%
ppm/V
ppm
µsec
Notes
1,2,3
1,2,3,8
2,4,8
2,8
1,6
6
2,3
3
2,3
2,3
6
5,6
5,6
2,3
6
6,7
6
6
1,3
±50
±5
+385
±100
4
2.97
3.3
55
V
CC
-1.3
650
250
250
50
60
0.135
100
500
-40
9.0 x 14.0 x 3.5
85
3.63
70
V
CC
-1.2
950
20
400
400
55
0.250
V
CC
I
CC
V
mA
V
mV-pp
mA
ps
ps
%
dBc
ps-rms
kΩ
kHz
°C
mm
V
CC
-1.4
550
I
OUT
t
R
t
F
SYM
φJ
Z
c
BW
T
OP
45
50
See Standard Frequencies and Ordering Information (Pg 7).
Parameters are tested with production test circuit below (Fig 1).
Parameters are tested at ambient temperature with test limits guardbanded for specified operating temperature.
Measured as the maximum deviation from the best straight-line fit, per MIL-0-55310.
Measured from 20% to 80% of a full output swing (Fig 2).
Not tested in production, guaranteed by design, verified at qualification.
Integrated across 50 kHz to 80 MHz, per GR-253-CORE Issue3.
Tested with Vc = 0.3V to 3.0V.
Vc (-1.0V to +1.7V)
1
F1 (-0.58V), F2 (+0.59V)
2
Vee (-1.3V)
3
5
4
6
Vcc (+2V)
COutput
t
R
Output
80%
t
F
SYM = 100 x t
A
/ t
B
Vcc - 1.0V
Vcc - 1.3V
50
Ω
50
Ω
20%
Vcc - 1.6V
Test Circuit Notes:
1) To Permit 50
Ω
Measurement of Outputs, all DC Inputs are Biased Down 1.3V.
2) All Voltage Sources Contain Bypass Capacitors to Minimize Supply Noise.
3) 50
Ω
Terminations are Within Test Equipment.
t
A
t
B
Figure 1. Test Circuit
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 2 of 7
Figure 2. 10K LV-PECL Waveform
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 25Apr05
VS-550 Voltage Controlled SAW Oscillator
Outline Diagram
6
5
4
Pad Layout
VS-550-LFF-GNN
XXX.XXX-XXX.XXX
VI YWW
8.89±0.15
[0.350±0.006]
( 7.63
[0.300])
1.27
[0.050]
1
2
3
13.97±0.20
[0.550±0.008]
0.46±0.05
[0.018±0.002]
[
3.42+0.20
-0.30
0.135+0.008
-0.012
8.80
[0.346]
]
3.00
[0.118]
2.54
[0.100]
5.08
[0.200]
mm
[inch]
5.08±0.13
[0.200±0.005]
2.54±0.13
[0.100±0.005]
mm
[inch]
Pin Out
Pin
1
2
3
4
5
6
Control Logic (LV-CMOS)
Function
VCSO Control Voltage
Frequency Select (See Control Logic)
Case and Electrical Ground
VCSO Output
VCSO Complementary Output
Power Supply Voltage (3.3 V
±10%)
Symbol
V
C
FS
GND
Output
COutput
V
CC
FS
0
1
Operation
F1
F2
Tape and Reel (EIA-481-2-A)
Po
ØDo
W2
F
W
D
C
N
A
P1
W1
B
Tape Dimensions (mm)
Dimension
Tolerance
VS-550
Reel Dimensions (mm)
F
Do
Typ
1.5
W
Typ
24
Po
Typ
4
P1
Typ
12
A
Typ
330
B
Min
1.5
C
Typ
13
D
Min
20.2
N
Min
100
W1
Typ
24.4
W2
Max
30.4
Typ
11.5
# Per
Reel
200
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 3 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 25Apr05
VS-550 Voltage Controlled SAW Oscillator
Absolute Maximum Ratings
Parameter
Power Supply
Input Current
Output Current
Voltage Control Range
Storage Temperature
Solder Temperature / Duration
Symbol
V
CC
I
IN
I
OUT
V
C
T
STR
T
PEAK
/ t
P
Ratings
0 to 6
100
25
0 to V
CC
-55 to 125
260 / 40
Unit
V
mA
mA
V
°C
°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
+3.3V
0.10
µ
F
0.01
µ
F
0.10
µ
F
0.01
µ
F
150
Ω
150
Ω
+3.3V
+3.3V
Vc
FS
Gnd
1
2
3
6
5
4
Vcc
COutput
Output
Z = 50
Ω
Z = 50
Ω
240
Ω
100
Ω
Vc
FS
Gnd
1
2
3
6
5
4
Vcc
COutput Z = 50
Ω
Output
Z = 50
Ω
40
Ω
40
Ω
49
Ω
49
Ω
240
Ω
LV-PECL to LV-PECL:
For short transmission lengths, the power
consumption could be reduced by removing the 100
Ω
resistor and
doubling the value of the pull down resistors.
LV-PECL to LVDS:
Restricted for short transmission lengths.
Configuration may require modification depending on LVDS receiver.
+3.3V
0.10
µ
F
0.01
µ
F
0.10
µ
F
0.01
µ
F
+2.0V
Vc
FS
Gnd
1
2
3
6
5
4
Vcc
COutput
Output
0.01
µ
F
Vc
FS
-1.3V
1
2
3
6
5
4
Vcc
COutput
Output
0.01
µ
F
240
Ω
240
Ω
Functional Test:
Allows standard power supply configuration.
Since AC coupled, the LV-PECL levels cannot be measured.
Production Test:
Allows direct DC coupling into 50
Ω
measurement
equipment. Must bias the power supplies as shown. Similar to Figure 1.
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 4 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 25Apr05
VS-550 Voltage Controlled SAW Oscillator
Typical Characteristics
800
At Ambient (22.5°C)
600
400
Typical Gain Transfer @ 622.0800 = +393 ppm/V
Typical Gain Transfer @ 644.5313 = +372 ppm/V
Frequency (PPM)
200
0
-200
622 Vc Pull
-400
y = 393.01x - 555.91
y = 371.69x - 531.82
-600
-800
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
3
644 Vc Pull
Linear (622 Vc Pull)
Linear (644 Vc Pull)
Control Voltage (V)
-95
-100
-105
-110
1/f
-115
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 ps-pp
3
OC-192 Spec
F1 = 622.0800
F2 = 644.5313
L(f) (dBc/Hz)
-120
1/f
-125
-130
-135
-140
-145
-150
-155
10
100
2
1/f
1
OC-192 Spec Equivalent to
0.25 ps-rms @ 500 MHz
1,000
10,000
100,000
Offset (kHz)
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 5 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 25Apr05
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