Model: FXO-LC72 SERIES
LVDS 7 x 5mm 2.5V Oscillator
Features
X
TREMELY
Low Jitter
Low Cost
X
PRESS
Delivery
Frequency Resolution to six decimal places
Stabilities to ± 20 PPM
-20 to +70°C or -40 to +85°C operating temperatures
Tri-State Enable / Disable Feature
Industry Standard Package, Footprint & Pin-Out
Fully RoHS compliant
Gold over Nickel Termination Finish
Serial ID with Comprehensive Traceability
V
DD
Enable / Disable
Freq: 0.75 MHz to 1.0GHz
Rev. 02/18/2008
Applications
•
•
•
•
•
•
•
•
•
ANY application requiring an oscillator
SONET
Ethernet
Storage Area Network
Broadband Access
Microprocessors / DSP / FPGA
Industrial Controllers
Test and Measurement Equipment
Fiber Channel
X
PRESS
O
ASICs
GND
FOX
OUTPUT
For more information -- Click on the drawing
Contents
page
Description
The Fox X
PRESS
O Crystal Oscillator is a
breakthrough in configurable Frequency Control
Solutions. X
PRESS
O utilizes a family of
proprietary ASICs, designed and developed by
Fox, with a key focus on noise reduction
technologies.
The 3
rd
order Delta Sigma Modulator reduces
noise to the levels that are comparable to
traditional Bulk Quartz and SAW oscillators.
The ASICs family has ability to select the output
type, input voltages, and temperature
performance features.
With the X
PRESS
lead-time, low cost, low noise,
wide frequency range, excellent ambient
performance, XpressO is an excellent choice
over the conventional technologies.
Finished X
PRESS
O parts are 100% final tested.
Model Selection & Part Number Guide
2
Electrical Characteristic
3
Absolute Maximums
3
Output Wave Characteristics
4
Phase Noise
5
Jitter
5
Pin Assignment
6
Recommended Circuit
6
Reflow
6
Mechanical Drawing and Pad Layout
7
Tape and Reel Specification
8
Label
8
Traceability – LOT Number & Serial Identification 9
RoHS Material Declaration
10
SGS Report
11 & 12
Mechanical Test
13
Burn-In Test
13
MTTF / FITS calculations
14
15
Other X
PRESS
O Links
Fox Contact Information
15
Page 1 of 15
FOXElectronics
5570 Enterprise Parkway Fort Myers, Florida 33905 USA +1.239.693.0099 FAX +1.239.693.1554 http://www.foxonline.com
EMEA
Tel/Fax: +44 .1767.312632 |
Asia
Hong Kong Tel: +852.2854.4285 Fax +852.2854.4282
Taiwan
Tel: +886.2.22073427 Fax +886.2.22073486 |
Japan
Tel: +81.3.3374.2079 Fax: +81.3.3374.5221
© 2008 FOX ELECTRONICS | ISO9001:2000 Certified
FXO-LC72
Series
Model Selection Guide & Fox Part Number
STEP #1:
Customer selects the Model Description and provides to Fox Customer Service
Model Description
FXO – L C 7 2 6 R – 781.25
Frequency (in MHz)
Resolutions to 6 places
past the decimal point
H
=
HCMOS
C
= Ceramic
Q
= Quartz
L
=
LVDS
P
= LVPECL
M
= LVDS
(pin 2 E/D)
Q
= LVPECL
(pin 2 E/D)
X
= HCMOS
(comp 2
nd
Output)
5
= 5 x 3.2mm
7
= 7 x 5mm
3
= 3.3 V
2
= 2.5 V
0
= ± 100 PPM
blank
= -20°C to +70°C
5
= ± 50 PPM
R
= -40°C to +85°C
6
= ± 25 PPM
8
= ± 20 PPM
(-20 ~ +70°C)
STEP #2:
The Fox Customer Service team provides a customer specific Part Number
for use on their Bill Of Materials (BOM).
Fox Part Number
The 1
st
Field
(The assigned Fox Part Number must be on the BOM – not the above Model Description)
(This will ensure receipt of the proper part)
Product Code #
767A = FXO–HC52
768A = FXO–HC72
770B = FXO–LC52
771B = FXO–LC72
773B = FXO–PC52
774B = FXO–PC72
7 7 1B – 7 8 1 . 2 5 – 1
The 3
rd
Field
The 2
nd
Fox Internally Generated Number
The Customer’s Frequency
Field
(If any specification changes,
the last digits change)
(The same specs for a different customer
also changes the last digits)
This example,
FXO-LC726R-781.25
= LVDS Output, Ceramic, 7 x 5mm Package, 2.5V,
±25 PPM Stability, -40 to +85°C Temperature Range, at 781.25 MHz
© 2008 FOX ELECTRONICS | ISO9001:2000 Certified
Page
2 of 15
FXO-LC72
Series
Electrical Characteristics
Parameters
Frequency Range
Frequency Stability
1
Temperature Range
Supply Voltage
Input Current
(@ 100 Ohm LOAD)
Output Load
Start-Up Time
Output Enable / Disable Time
Moisture Sensitivity Level
Termination Finish
T
STG
V
DD
I
DD
Differential
T
S
MSL
Symbol
F
O
T
O
Condition
Maximum Value
(unless otherwise noted)
Standard operating
Optional operating
Storage
Standard
0.75 ~ 20.000 MHz
20.000+ ~ 220.000 MHz
220.000+ ~ 630.000 MHz
630.000+ MHz ~ 1.000 GHz
Standard
JEDEC J-STD-20
0.750 MHz to 1.0 GHz
100, 50, 25, & 20 ppm
-20°C to +70°C
-40°C to +85°C
-55°C to +125°C
2.5 V ± 5%
26 mA
34 mA
44 mA
65 mA
100 Ohms Typ.
10 mS
100 nS
1
Au
Note 1 – Stability is inclusive of 25°C tolerance, operating temperature range, input voltage change, load change, aging, shock and vibration.
Absolute Maximum Ratings
(Useful life may be impaired.
Parameters
Input Voltage
Operating Temperature
Storage Temperature
Junction Temperature
ESD Sensitivity
For user guidelines only, not tested)
Symbol
V
DD
T
AMAX
T
STG
HBM
Condition
Maximum Value
(unless otherwise noted)
Human Body Model
–0.5V to +5.0V
–55°C to +105°C
–55°C to +125°C
125°C
>1 kV
Page
3 of 15
© 2008 FOX ELECTRONICS | ISO9001:2000 Certified
FXO-LC72
Series
Output Wave Characteristics
Parameters
Differential Output Voltage
Output Offset Voltage
Output Symmetry
(See Drawing Below)
Output Enable
(PIN # 1)
Voltage
Note1
Output Disable
(PIN # 1)
Voltage
Note1
Cycle Rise Time
(See Drawing Below)
Cycle Fall Time
(See Drawing Below)
Note1
Symbol
V
OD
V
OS
V
IH
V
IL
T
R
T
F
Condition
0.75 MHz to 1.0 GHz
Volts DC
@ 50% V
P-P
Level
Maximum Value
(unless otherwise noted)
20%~80%
80%~20%
0.4V Typ.
1.25V Typ
45% ~ 55%
> 70% V
DD
< 30% V
DD
400 pS
400 pS
An optional PIN # 2 as Enable / Disable is available – see Model Selection Guide (page 2)
Rise Time / Fall Time Measurements
T
R
OUTPUT 2
T
F
20% to 80
%
50% V
P-P
1.25V Typ.
0.4V Typ.
P-P
OUTPUT 1
Oscillator Symmetry
Ideally, Symmetry should be 50/50 for 1/2 period -- Other expressions are 45/55 or 55/45
OUTPUT 2
Oscillator Symmetry
Ideally, Symmetry should be 50/50 for 1/2 period -- Other expressions are 45/55 or 55/45
50% V
P-P
OUTPUT 2
OUTPUT 1
50% V
P-P
1/2 Period
Period
OUTPUT 1
1/2 Period
Period
Page
4 of 15
© 2008 FOX ELECTRONICS | ISO9001:2000 Certified
FXO-LC72
Series
Phase Noise
0 dBc
-10dBc
-20dBc
-30dBc
-40dBc
-50dBc
-60dBc
212.5 MHz
156.25 MHz
2.5V Phase Noise Graph
(dBc / Hz) vs. offset frequency
Data Collected using HP 3048A
Four Frequencies from Jitter Tables
62.5 MHz only to 2 MHz offset Equipment Limitation
-70dBc
-80dBc
-90dBc
-100dBc
-110dBc
-120dBc
-130dBc
-140dBc
-150dBc
-160dBc
62.5 MHz
622.08 MHz
62.5 MHz
622.08 MHz
212.5 MHz
156.25 MHz
10
100
1k
10k
100k
1M
10M
40M
Offset Frequency
(10Hz to 40MHz)
Jitter is frequency dependent. Below are typical values at select frequencies.
LVDS Phase Jitter & Time Interval Error (TIE)
Frequency
62.5 MHz
156.25 MHz
212.5 MHz
622.08MHz
Phase Jitter
(12kHz to 20MHz)
TIE
(Sigma of Jitter Distribution)
Units
pS RMS
pS RMS
pS RMS
pS RMS
2.12
1.04
1.35
1.30
3.1
3.5
4.2
3.7
Phase Jitter
is integrated from HP3048 Phase Noise Measurement System; measured directly into 50 ohm input; V
DD
= 2.5V.
TIE
was measured on LeCroy LC684 Digital Storage Scope, directly into 50 ohm input, with Amherst M1 software; V
DD
= 2.5V.
Per
MJSQ
spec (Methodologies for Jitter and Signal Quality specifications)
LVDS Random & Deterministic Jitter Composition
Frequency
62.5 MHz
156.25 MHz
212.5 MHz
622.08 MHz
Random (Rj)
(pS RMS)
Deterministic (Dj)
(pS P-P)
Total Jitter (Tj)
(14 x Rj) + Dj
27.6 pS
29.2pS
31.2 pS
27.2 pS
1.35
1.40
1.42
1.18
8.4
9.2
10.9
10.4
Rj and Dj
, measured on LeCroy LC684 Digital Storage Scope, directly into 50 ohm input, with Amherst M1 software.
Per
MJSQ
spec (Methodologies for Jitter and Signal Quality specifications)
Page
5 of 15
© 2008 FOX ELECTRONICS | ISO9001:2000 Certified
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