SO-720
SAW Based Clock Oscillator
Features
•
Industry Standard Package, 5.0 x 7.5 x 2.0 mm
•
ASIC Technology For Ultra Low Jitter
0.100 ps-rms typical across 12 kHz to 20 MHz BW
0.120 ps-rms typical across 50 kHz to 80 MHz BW
•
Output Frequencies from 150 MHz to 1 GHz
•
3.3 V Operation
•
LV-PECL or LVDS Configuration with Fast Transition Times
•
Complementary Outputs
•
Output Disable Feature
•
Improved Temperature Stability over Standard SAW XO
Product is free of lead and compliant to
EC RoHS Directive
Applications
Reference Clock for Wired and Wireless Products
Description
•
1-2-4 Gigabit Fibre Channel
•
10 Gigabit Fibre Channel
•
10GbE LAN / WAN
•
OC-192
•
SONET / SDH
Standard
INCITS 352-2002
INCITS 364-2003
IEEE 802.3ae
ITU-T G.709
GR-253-CORE Issue3
Description
The SO-720 is a SAW Based Clock Oscillator that achieves
low phase noise and very low jitter performance.
The SO-720 is housed in an industry standard 6-Pad leadless
ceramic package that is hermetically sealed. Packaging
options include bulk or tape and reel.
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 1 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 28 November 2007
SO-720 SAW Clock Oscillator
Electrical Performance
Parameter
Frequency
Nominal Frequency
Frequency Stability (Ordering Option)
Aging
Supply
Voltage
Current (No Load)
Outputs
Mid Level - LVPECL
Swing – LVPECL
Mid Level - LVDS
Swing – LVDS
Current
Rise Time
Fall Time
Symmetry
Jitter (12 kHz – 20 MHz BW) 622.08 MHz
Jitter (50 kHz – 80 MHz BW) 622.08 MHz
Period Jitter, RMS (622.08 MHz)
Period Jitter, Peak - Peak (622.08 MHz)
Operating Temp. (Ordering Option)
Package Size
1.
2.
3.
4.
5.
6.
7.
8.
9.
Symbol
f
N
f
STAB
Minimum
150
Typical
Maximum
1000
Units
MHz
ppm
ppm
Notes
1,2
1,2
6,8
±50, ±100
10
V
CC
I
CC
2.97
3.3
55
Vcc-1.25
600
Vcc-2.3
350
3.63
70
Vcc-1.0
750
V
CC
-2.5
450
20
500
500
55
0.250
0.300
3.0
24
V
mA
V
mV-pp
V
mV-pp
mA
ps
ps
%
ps-rms
ps-rms
ps-rms
ps pk-pk
°C
mm
2,3
3
2,3
2,3
2,3
2,3
6
5,6
5,6
2,3
6,7
6,7
9
9
1
Vcc-1.4
450
V
CC
-2.4
250
I
OUT
t
R
t
F
SYM
φJ
φJ
φJ
φJ
T
OP
45
50
0.100
0.120
2.5
16
0/70,-20/70 or -40/85
5.0 x 7.5 x 2.0
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 guard-banded 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 stated bandwidth per GR-253-CORE Issue3.
Aging Rate for 10 years (Aging is not part of overall frequency stability budget unless specified at time of order)
Broadband Period Jitter measured using Lecroy Wavemaster 8600A 6 GHz Oscilloscope, 250K samples taken.
Enable, Disable
(-1.3V, +2.0V)
1
6
(+2.0V)
t
R
No connect
2
5
COutput
t
F
SYM = 100 x t
A
/ t
B
Vcc - 1.0V
80%
(-1.3V)
3
4
50
Ω
Output
Vcc - 1.3V
20%
Vcc - 1.6V
50
Ω
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
Page 2 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 28 November 2007
SO-720 SAW Clock Oscillator
Outline Diagram
Suggested Pad Layout
1.96
[0.077]
3.66
[0.144]
1.78
[0.070]
2.54
[0.100]
5.08
[0.200]
mm
[inch]
Pin Out
Pin
1
Symbol
NC or
OE
1
OE
1
or
NC
GND
Output
COutput
V
CC
Function
NC or
Enable = LV-CMOS Logic 0 or Ground
Disabled = LV-CMOS Logic 1
NC or
Enable = LV-CMOS Logic 0 or Ground
Disabled = LV-CMOS Logic 1
Case and Electrical Ground
Output
Complementary Output
Power Supply Voltage (+3.3V ± 10%)
2
3
4
5
6
Note 1: For proper operation, chosen disable pin can not be left floating and a pin 1 or pin 2 enable option must be ordered
See page 7 for alternative input logic option
Tape and Reel (EIA-481-2-A)
Po
ØDo
W2
F
W
D
C
N
A
P1
W1
B
Tape Dimensions (mm)
Dimension
Tolerance
SO-720
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
Page 3 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 28 November 2007
SO-720 SAW Clock Oscillator
Absolute Maximum Ratings
Parameter
Power Supply
Output Current
Storage Temperature
Soldering Temp/Time
Symbol
V
CC
Iout
TS
T
LS
Ratings
0 to 4
25
-55 to 125
260 / 40
Unit
V
mA
°C
°C/sec
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 datasheet. Exposure to absolute maximum ratings for extended periods may adversely affect device
reliability. Permanent damage is also possible if OD is applied before Vcc.
Suggested Output Load Configurations
+3.3V
0.10
µ
F
0.01
µ
F
0.10
µ
F
0.01
µ
F
+3.3V
+3.3V
150
Ω
150
Ω
OD
N/C
Gnd
1
2
3
6
5
4
Vcc
COutput
Output
Z = 50
Ω
Z = 50
Ω
100
Ω
OD
N/C
Gnd
1
2
3
6
5
4
Vcc
COutput
Output
Z = 50
Ω
Z = 50
Ω
40
Ω
40
Ω
49
Ω
49
Ω
240
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
OD
N/C
Gnd
1
2
3
6
5
4
Vcc
COutput
Output
0.01
µ
F
0.01
µ
F
OD
N/C
-1.3V
1
2
3
6
5
4
Vcc
COutput
Output
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 supplys 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: 28 November 2007
SO-720 SAW Clock Oscillator
Typical Phase Noise
0
SO-720-LFF-GAA- 622.0800 MHz
-10
-20
-30
-40
Phase Noise Level (dBc/Hz)
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
10
100
1000
10000
100000
1000000
10000000
100000000
Frequency Offset (Hz)
Jitter OC48 (12kHz to 20MHz)
0.08 ps-rms or 0.56 ps-pp
Jitter OC192 (50kHz to 80MHz)
0.11 ps-rms or 0.80 pp-rms
Phase Noise at Specific Frequency
Offsets
10Hz -46 dBc/Hz
100Hz -80 dBc/Hz
1000Hz -110 dBc/Hz
10kHz -130 dBc/Hz
100kHz -134 dBc/Hz
1MHz -138 dBc/Hz
10MHz -147 dBc/Hz
20MHz -147 dBc/Hz
40MHz -148 dBc/Hz
Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
Page 5 of 7
Tel: 1-88-VECTRON-1
Website: www.vectron.com
Rev: 28 November 2007
嵌入式系统
