This part is no longer available from Fox, please contact IDT for this product.
Model: FXU-LC53 SERIES         
   
LVDS  5 x 3.2mm  3.3V  Oscillator       Freq: 0.016 MHz to 1.5GHz
Rev. 07/08/2015 
Features 
ULTRA Low Jitter 
Low Cost 
XPRESS Delivery 
Frequency Resolution to six decimal places 
Stabilities to  20 PPM 
-20 to +70C or -40 to +85C operating temperatures
Tri-State Enable / Disable Feature
Applications 
Industry Standard Package, Footprint & Pin-Out
 ANY application requiring a high
Fully RoHS compliant
performance LVDS oscillator
Gold over Nickel Termination Finish
 SONET
Serial ID with Comprehensive Traceability
 Ethernet
 Storage Area Network
V
 Broadband Access
DD
Enable / Disable
 Microprocessors / DSP / FPGA
FOX
 Industrial Controllers
OUTPUT
X PRESSO
 Test and Measurement Equipment
ASICs
GND
For more information -- Click on the drawing
Contents
page 
Description Model Selection & Part Number Guide  2 
Electrical Characteristic 3 
Absolute Maximums 3 
The Fox XPRESSO-ULTRA Crystal Oscillator is a 
Output Wave Characteristics 4 
breakthrough in configurable Frequency Control 
Phase Noise  5 
Solutions.   XPRESSO-ULTRA utilizes a family of 
Jitter  5 
proprietary ASICs, designed and developed by Fox, 
Pin Assignment 6 
with a key focus on noise reduction technologies. 
Recommended Circuit 6 
Reflow 6
th
The 4 order Delta Sigma Modulator reduces noise to 
Mechanical Drawing and Pad Layout 7 
the levels that are comparable to traditional Bulk 
Tape and Reel Specification 8 
Quartz and SAW oscillators.  The ASICs family has 
Label 8
the ability to select the output type and supply 
Traceability  LOT Number & Serial Identification 9 
voltage. 
Mechanical Test 10 
Other XPRESSO Series Links 11 
With the XPRESSO-ULTRA lead-time, low cost, low Fox Contact Information 11 
noise, wide frequency range, excellent ambient 
performance, XPRESSO-ULTRA is an excellent choice 
over the conventional technologies. 
Finished XPRESSO-ULTRA parts are 100% final 
tested. 
Page 1 of 11 
Fox Electronics 5570 Enterprise Parkway Fort Myers, Florida 33905 USA +1.239.693.0099 FAX +1.239.693.1554 
An Integrated Device Technology, Inc. company FOXonline.com  
This part is no longer available from Fox, please contact IDT for this product.
 
FXU-LC53 Series 
 
 
 
   Model  Selection  Guide  &  Fox  Part  Number  
 
 
STEP #1: Customer selects the Model Description and provides to Fox Customer Service 
 
 
Model  Description    
 
 
 FXU    L  C  5  3  5  R    6 2 2.0 8   Frequency  (in MHz) 
Resolutions  to  6  places 
 
past  the  decimal  point 
 
 
 
L = LVDS C = Ceramic 5 = 5 x 3.2mm 3 = 3.3 V 0 =  100 PPM blank = -20C to +70C 
 
M = LVDS  (pin 2 E/D) 
5 =  50 PPM 
R = -40C to +85C 
 
6 = 25 PPM 
 
8 = 20 PPM (-20C to +70C) 
 
 
 
 
 
 
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 assigned Fox Part Number must be on the BOM  not the above Model Description) 
 
(This will ensure receipt of the proper part) 
 
 
 
854  622.08  3 
 
st
rd
The 1 Field  
The 3 Field  
 
Product Code # 
Fox Internally Generated Number 
 
854 = FXULC5 
(If any specification changes, 
854C = FXU-MC5 
 
nd the last digits change) 
The 2 Field  
(The same specs for a different customer 
 
The Customers Frequency 
also changes the last digits) 
 
 
This example, FXU-LC535R-622.08 = LVDS Output,  Ceramic,  5 x 3.2mm Package,  3.3V,   
                                                                50 PPM Stability,  -40 to +85C Temperature Range,  at 622.08 MHz 
 
 
 
 
 
 
 
  
Page 2 of 11 
 2015  FOX ELECTRONICS | ISO9001:2008 Certified  
An Integrated Device Technology, Inc. company