VS-750
Dual Frequency VCSO
Features
•
5 x 7.5 x 2.5 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
•
Output Disable
•
Patent Pending Technology
•
Pb
Product is free of lead and compliant to
EC RoHS Directive
Applications
PLL circuits for Clock Smoothing and Frequency Translation
Description
•
1-2-4 Gigabit Fibre Channel
•
10 Gigabit Fibre Channel
•
10GbE LAN / WAN
•
OC-192
Vcc
COutput
Output
Standard
INCITS 352-2002
INCITS 364-2003
IEEE 802.3ae
ITU-T G.709
GR-253-CORE Issue3
•
SONET / SDH
Description
SAW 1
SAW 2
Vc
OD
FS
Gnd
The VS-750 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 leadless surface mount
package offered on tape and reel. It has a frequency select
function that enables either “Frequency 1” or “Frequency 2.” It
also has an output disable to facilitate on-board testing.
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 09Jan06
Page 1 of 7
VS-750 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.
Data Sheet
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
+405
±100
4
2.97
3.3
55
V
CC
-1.3
650
250
250
50
60
0.130
100
500
-40
5.0 x 7.5 x 2.5
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)
OE (-0.58V), OD (+0.59V)
F1 (-0.58V), F2 (+0.59V)
1
2
3
12
Vcc (+2V)
10
COutput
80%
t
R
t
F
SYM = 100 x t
A
/ t
B
Vcc - 1.0V
Vee (-1.3V)
5
8
50
Ω
50
Ω
Output
Vcc - 1.3V
-1.3V: 5,13
Gnd: 4,6,7,9,11,14
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
Figure 2. 10K LV-PECL Waveform
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 09Jan06
Page 2 of 7
VS-750 Voltage Controlled SAW Oscillator
Outline Diagram
12
11
10
9
8
Data Sheet
Pad Layout
13
14
VS750LG
XX - XX
VI YWW
1
2
4
3
7.50±0.15
[0.295±0.006]
5
7
6
5.10±0.15
[0.201±0.006]
1.02
[0.040]
1.96
[0.077]
0.25
[0.010]
1.27
[0.050]
0.64
[0.025]
4.14
[0.163]
1.30 [0.051]
1.02
[0.040]
2.49±0.18
[0.098±0.007]
1.52
[0.060]
1.27
[0.050]
Y = Year
WW = Week
XX = Frequency Code
(See Ordering Info)
mm
[inch]
1.02
[0.040]
0.20
[0.008]
1.45
[0.057]
2.54
[0.100]
5.08
[0.200]
0.76
[0.030]
0.76
[0.030]
R0.15 [R0.006]
0.10 [0.004]
2.07
1.27
[0.081]
[0.050]
3.28
[0.129]
1.27 [0.050]
2.54 [0.100]
mm
[inch]
Pin Out
Pin
1
2
3
4,6,7,9,11,14
5,13
8
10
12
Marking Key
Symbol
V
C
OD
FS
NC
Gnd
Output
COutput
V
CC
Function
VCSO Control Voltage
Output Disable (See Control Logic)
Frequency Select (F1 or F2)
No Connection (Suggest to Gnd)
Case and Electrical Ground
VCSO Output
VCSO Complementary Output
Power Supply Voltage (3.3 V
±10%)
Position 6
L = LFF
Position 7
G = GNN
H = HNN
Control Logic (LV-CMOS)
OD
0
0
1
FS
0
1
0
Operation
F1
F2
Disabled
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-750
Reel Dimensions (mm)
F
Do
Typ
1.5
W
Typ
16
Po
Typ
4
P1
Typ
8
A
Typ
178
B
Min
1.5
C
Typ
13
D
Min
20.2
N
Min
50
W1
Typ
16.4
W2
Max
22.4
Typ
7.5
# Per
Reel
200
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 09Jan06
Page 3 of 7
VS-750 Voltage Controlled SAW Oscillator
Absolute Maximum Ratings
Parameter
Power Supply
Input Current
Output Current
Voltage Control Range
Storage Temperature
Soldering 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
Data Sheet
Unit
V
mA
mA
V
°C
°C
/ sec
Stresses in excess of these absolute maximum ratings can permanently damage the device. Also, exposure to
these absolute maximum ratings for extended periods can 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, FS, or OD) draws
greater than 100 mA.
Suggested Output Load Configurations
0.10
µF
0.01
µF
+3.3V
0.10
µF
0.01
µF
+3.3V
+3.3V
150Ω
150Ω
Vc
OD
FS
Gnd
1
2
3
5
12
10
8
Vcc
COutput
Output
Z = 50Ω
Z = 50Ω
100Ω
Vc
OD
FS
Gnd
1
2
3
5
12
10
8
Vcc
COutput
Output
Z = 50Ω
Z = 50Ω
40Ω
40Ω
49Ω
49Ω
Gnd: 5,13
NC or Gnd: 4,6,7,9,11,14
240Ω
240Ω
Gnd: 5,13
NC or Gnd: 4,6,7,9,11,14
LV-PECL to LVDS:
Restricted for short transmission lengths.
Configuration may require modification depending on LVDS receiver.
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.
+3.3V
0.10
µF
0.01
µF
0.10
µF
0.01
µF
+2.0V
Vc
OD
FS
Gnd
1
2
3
5
12
10
8
Vcc
COutput
Output
0.01
µF
0.01
µF
Vc
OD
FS
-1.3V
1
2
3
5
12
10
8
Vcc
COutput
Output
Gnd: 5,13
NC or Gnd: 4,6,7,9,11,14
240Ω
240Ω
-1.3V: 5,13
NC or Gnd: 4,6,7,9,11,14
Production Test:
Allows direct DC coupling into 50Ω measurement
equipment. Must bias the power supplys as shown. Similar to Figure 1.
Functional Test:
Allows standard power supply configuration.
Since AC coupled, the LV-PECL levels cannot be measured.
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 09Jan06
Page 4 of 7
VS-750 Voltage Controlled SAW Oscillator
Typical Characteristics
800
Data Sheet
At Ambient (22.5°C)
600
400
Typical Gain Transfer @ 622.0800 = +415 ppm/V
Typical Gain Transfer @ 644.5313 = +399 ppm/V
Frequency (PPM)
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
622 Vc Pull
644 Vc Pull
y = 415.29x - 605.56
y = 398.69x - 578.48
Linear (622 Vc Pull)
Linear (644 Vc Pull)
Control Voltage (V)
-95
Typical Calculated Jitter @ Vc = 1.65V
-100
-105
-110
1/f
-115
OC-192 Spec
F1 = 622
F2 = 644
SONET OC-48 (12kHz-20MHz) = 0.23 ps-rms; 1.61 ps-pp
SONET OC-192 (50kHz-80MHz) = 0.13 ps-rms; 0.91 ps-pp
3
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
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 09Jan06
Page 5 of 7
