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637L21253C3T

Description
LVDS Output Clock Oscillator, 212.5MHz Nom,
CategoryPassive components    oscillator   
File Size905KB,8 Pages
ManufacturerCTS
Environmental Compliance
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637L21253C3T Overview

LVDS Output Clock Oscillator, 212.5MHz Nom,

637L21253C3T Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerCTS
Reach Compliance Codecompliant
Factory Lead Time10 weeks
Other featuresSTANDBY; ENABLE/DISABLE FUNCTION; COMPLEMENTARY OUTPUT; TR, 7 INCH
maximum descent time0.7 ns
Frequency Adjustment - MechanicalNO
frequency stability50%
Installation featuresSURFACE MOUNT
Nominal operating frequency212.5 MHz
Maximum operating temperature70 °C
Minimum operating temperature-20 °C
Oscillator typeLVDS
Output load100 OHM
physical size7.0mm x 5.0mm x 2.0mm
longest rise time0.7 ns
Maximum supply voltage3.465 V
Minimum supply voltage3.135 V
Nominal supply voltage3.3 V
surface mountYES
maximum symmetry55/45 %
Base Number Matches1
 
Model 637 
Features 
Ceramic Surface Mount Package 
Very Low Phase Jitter Performance, 500fs Maximum 
Fundamental or 3
rd
 Overtone Crystal Design 
Frequency Range 10 – 320MHz * 
+2.5V or +3.3V Operation 
Output Enable Standard 
Tape and Reel Packaging, EIA‐418 
Very Low Jitter LVPECL or LVDS Clock  
 
Part Dimensions: 
7.0 × 5.0 × 2.0mm • 178.462mg 
 
Applications 
SerDes 
Storage Area Networking 
Broadband Access 
SONET/SDH/DWDM 
PON 
Ethernet/GbE/SyncE 
Fiber Channel 
Test and Measurement 
Standard Frequencies 
‐ 25.00MHz 
 
‐ 50.00MHz 
 
‐ 100.00MHz 
 
‐ 125.00MHz 
 
‐ 155.52MHz 
 
‐ 156.25MHz 
 
 
‐ 161.1328MHz 
‐ 187.50MHz 
‐ 200.00MHz 
‐ 212.50MHz 
‐ 250.00MHz 
‐ 312.50MHz 
* Check with factory for availability. 
Description  
CTS Model 637 is a low cost, high performance clock oscillator supporting differential LVPECL or LVDS outputs.  
Employing the latest IC technology, M637 has excellent stability and low jitter/phase noise performance.  
Ordering Information
Model
637
Output Type
P
 
Frequency Code
[MHz]
X X X or X X XX
Frequency 
Stability
3
Temperature 
Range
I
Supply
Voltage
3
Packaging
T
Code
P
L
E
V
Output
LVPECL ‐ Pin 1 Enable
LVDS ‐ Pin 1 Enable
LVPECL ‐ Pin 2 Enable
LVDS ‐ Pin 2 Enable
Code
6
5
3
2
Stability
±20ppm 
±25ppm
±50ppm
±100ppm
2
Code
2
3
Voltage
+2.5Vdc
+3.3Vdc
Code
Frequency
1
Product Frequency Code 
Code Temp. Range
‐10°C to +60°C
A
‐20°C to +70°C
C
‐40°C to +85°C
I
Packing
Code
1k pcs./reel
T
Notes:
1] Refer to document 016‐1454‐0, Frequency Code Tables.  3‐digits for frequencies <100MHz, 4‐digits for frequencies 100MHz or greater.
2] Consult factory for availability of 6I Stability/Temperature combination.
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
 
DOC# 008‐0453‐0  Rev. B  
 
 Page 1 of 8 
©2015  CTS®  Corporation. 
 
Information/product(s)  subject  to  change.  No  warranty  that  product(s)  will  meet  the  stated  specifications  for  customer  specific  applications  or  test 
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote. 
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