VS-505
Single Frequency VCSO
Features
Industry Standard Package, 9.1 x 13.8 x 3.7 mm
5 Generation ASIC Technology for Ultra Low Jitter
120 fs-rms (f
N
= 622.08 MHz, 12 kHz to 20 MHz)
105 fs-rms (f
N
= 622.08 MHz, 50 kHz to 80 MHz)
th
Output Frequencies from 122.88 MHz to 1.00 GHz
Spurious Suppression, 90 dBc Typical
2.5V or 3.3V Supply Voltage
LVPECL or LVDS Output Configurations
Tri-State Output Select (OD, OS, OE)
Compliant to EC RoHS Directive
Pb
Applications
PLL circuits for Clock Smoothing and Frequency Translation
Description
SONET / SDH
OTN (Optical Transport Network)
10 GbE (Gigabit Ethernet)
10 GFC (Gigabit Fibre Channel)
40 GbE & 100 GbE
Synchronous Ethernet
WiMax
Vcc
COutput
Output
Standard
GR-253-CORE
ITU-T G.709/Y.1331
IEEE 802.3ae
INCITS 364-2003
IEEE 802.3ba
ITU-T G.8261
IEEE 802.16
Description
The VS-505 is a Voltage Controlled SAW Oscillator that
operates at the fundamental frequency of the internal SAW
filter. The SAW filter is a high-Q Quartz device that enables the
circuit to achieve low phase jitter performance over a wide
operating temperature range. A divider circuit is deployed for
output frequencies less than 491.52 MHz. The oscillator is
housed in a hermetically sealed leadless surface mount
package and offered on tape and reel. It has a tri-state Output
Select function that provides one of three conditions: Output
Disable, Output Set, or Output Enable.
SAW
LVPECL
LVDS
1
X
X=1,2,4
Vc
OSelect
Gnd
Vectron International, 267 Lowell Road, Suite 102, Hudson, NH 03051
Page 1 of 9
Tel: 1-88-VECTRON-1
Web:
www.vectron.com
Rev: 02Mar2014
VS-505 Single Frequency VCSO
Electrical Performance: 3.3V LV-PECL
Parameter
Frequency
Nominal Frequency
Absolute Pull Range
Linearity
Gain Transfer (Standard)
Temperature Stability
f
N
APR
Lin
K
V
f
STAB
V
CC
I
CC
I
CC
120
50
7
+445
100
2.97
3.3
73
60
V
CC
-1.3
750
1.5
180
180
50
90
150
190
280
130
472
200
-40
9.1 x 13.8 x 3.7
+85
3.63
75
V
CC
-1.1
1000
MHz
ppm
%
ppm/V
ppm
V
mA
mA
mV
mV-pp
V-pp
mA
ps-pp
ps-pp
%
dBc
fs-rms
fs-rms
fs-rms
k
k
kHz
°C
mm
1,2,3
1,2,3,9
2,4,9
2,9
1,7
2,3
3
3
2,3
2,3
2,3
7
6,7
6,7
2,3
7
7,8
7,8
7,8
7
7
7
1,3
Symbol
Minimum
Typical
Maximum
Units
Notes
Supply
Voltage (± 10%)
Current (Typical 50Ω Load)
Current (No Load)
Outputs
Mid Level
Single Ended Swing
Differential Swing
Current
Rise Time
Fall Time
Symmetry
Spurious Suppression
Jitter (>491.52 MHz to <1000.0 MHz)
Jitter (>245.76 MHz to <491.52 MHz)
Jitter (>122.88 MHz to <245.76 MHz)
V
CC
-1.5
I
OUT
t
R
t
F
SYM
J
J
J
Z
C
Z
C
BW
T
OP
45
85
20
250
250
55
Control Voltage
Input Impedance (Output Enabled)
Input Impedance (Output Disabled)
Modulation Bandwidth
Operating Temperature
Package Size
1. See Standard Frequencies and Ordering Information (Pg 8).
2. Parameters are tested with production test circuit (Pg 3).
3. Parameters are tested at ambient temperature with test limits guard-banded for specified operating temperature.
4. Measured as the maximum deviation from the best straight-line fit, per MIL-0-55310.
5. The Vc Model is described below (Fig 1).
6. Parameters are described with waveform diagram below (Fig 2).
7. Not tested in production, guaranteed by design, verified at qualification.
8. For Frequencies >491.52 MHz, Jitter is Integrated across 50 kHz to 80 MHz.
For Frequencies <491.52 MHz, Jitter is Integrated across 12 kHz to 20 MHz. (Both per GR-253-CORE Issue3).
9. Tested with Vc = 0.3V to 3.0V.
SYM = 100 x t
A
/ t
B
t
R
6.8kΩ
Vc
47pF
123kΩ
80%
t
F
Vcc-1.1V
Vcc=+2V
+
-
1.65V
20%
Vcc-1.3V
Vcc-1.5V
t
A
t
B
Figure 1. Vc Model – Output Enabled
Figure 2. 10K LV-PECL Waveform
Vectron International, 267 Lowell Road, Suite 102, Hudson, NH 03051
Page 2 of 9
Tel: 1-88-VECTRON-1
Web:
www.vectron.com
Rev: 0Mar2014
VS-505 Single Frequency VCSO
Absolute Maximum Ratings
Parameter
Power Supply
Input Current
Output Current
Voltage Control Range
Output Select
Storage Temperature
Soldering Temperature / Duration
Symbol
V
CC
I
IN
I
OUT
V
C
OSelect
T
STR
T
PEAK
/ t
P
Ratings
0 to 6
100
25
0 to V
CC
0 to V
CC
-55 to 125
260 / 40
Unit
V
mA
mA
V
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 OS) draws >100 mA.
Test Circuits & Output Load Configurations
+3.3V
0.10
F
OSelect
0.01
F
Vc
OSelect
Gnd
Vcc
COutput
Output
0.01
F
0.01
F
+
-
+
-
Vc (-3.00V to -0.30V)
H (-0.55V to 0.00V)
M (-1.90V to -1.40V)
L (-3.30V to -2.75V)
+2.0V
0.10
F
0.01
F
1
2
3
6
5
4
Vc
1
2
3
6
5
4
Vcc
COutput
Output
Or
0.01
F
0.01
F
10K
OSelect
Vee
-1.3V
240
240
10K
Functional Test:
Allows use of standard power supply biasing
configuration. Pull down resistors are used for LV-PECL outputs
and are removed for with LVDS outputs. Since the LVDS outputs
are AC coupled, the output DC levels cannot be measured.
V DMV
Production Test:
DC levels shown for Vee, OSelect,
& Vc are for devices configured for 3.3V operation.
Vee
LV-PECL outputs are DC coupled to 50
test
equipment. LVDS outputs are connected to a digital volt meter, then AC
coupled to the test equipment. The digitial volt meter allows for Mid Level &
Swing measurements.
+3.3V
0.10
F
0.01
F
Vc
OSelect
Gnd
Vcc
COutput
Output
Z = 50
Z = 50
100
Vc
OSelect
Gnd
+3.3V
0.10
F
0.01
F
Vcc
COutput
Output
Z = 50
Z = 50
100
1
2
3
6
5
4
1
2
3
6
5
4
240
240
LV-PECL to LV-PECL:
For short transmission lengths, the pull
down resistor values shown provide reasonable power
consumption and waveform performance.
LVDS to LVDS:
The 100
resistor should be removed if this load is
provided internally within the LVDS receiver.
Vectron International, 267 Lowell Road, Suite 102, Hudson, NH 03051
Page 3 of 9
Tel: 1-88-VECTRON-1
Web:
www.vectron.com
Rev: 0Mar2014
VS-505 Single Frequency VCSO
Typical Characteristics: Vc Pull & Vc Pull Linearity
900
800
700
600
500
400
850.00
622.08
491.52
425.00
311.04
245.76
212.50
155.52
122.88
Kv = 459 ppm/V
Kv = 443 ppm/V
Kv = 458 ppm/V
Vc Pull
Frequency (ppm)
300
200
100
0
-100
-200
-300
-400
-500
-600
-700
0.00
TPull = 1240 ppm
TPull = 1150 ppm
TPull = 1258 ppm
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
2.70
3.00
3.30
Control Voltage (V)
10%
8%
6%
4%
850.00
622.08
491.52
425.00
311.04
245.76
212.50
155.52
122.88
Vc Pull Linearity
Max (0.3V to 3.0V) = 3.32%
Min (0.3V to 3.0V) = -6.19%
Vc Linearity (%)
2%
0%
-2%
-4%
-6%
-8%
-10%
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
2.70
3.00
Control Voltage (V)
Vectron International, 267 Lowell Road, Suite 102, Hudson, NH 03051
Page 4 of 9
Tel: 1-88-VECTRON-1
Web:
www.vectron.com
Rev: 0Mar2014
VS-505 Single Frequency VCSO
Typical Characteristics: Phase Noise & Jitter
-20
-30
-40
-50
-60
-70
Jitter (fs-rms)
Frequency 12K-20M
850.00
104.7
622.08
116.3
491.25
128.8
425.00
142.9
311.04
169.2
245.76
185.1
212.50
205.0
155.52
235.3
122.88
275.1
Agilent E5052B
50K-40M 50K-80M
67.3
83.7
79.0
100.5
106.3
140.6
160.0
217.8
183.7
255.0
218.9
258.4
300.5
360.5
850.00
Fund
622.08
491.52
425.00
Div2
311.04
245.76
212.50
Div4
155.52
122.88
12K - 20M
50K - 80M
L(f) (dBc/Hz)
-80
-90
-100
-110
-120
-130
-140
-150
-160
10
100
1,000
10,000
100,000
1,000,000
10,000,000
100,000,000
Offset (Hz)
Vectron International, 267 Lowell Road, Suite 102, Hudson, NH 03051
Page 5 of 9
Tel: 1-88-VECTRON-1
Web:
www.vectron.com
Rev: 0Mar2014
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