Model 637
637
Very Low Jitter LVPECL or LVDS Clock
Features
Ceramic Surface Mount Package
Very Low Phase Jitter Performance, 500fs Maximum
Fundamental or 3rd Overtone Crystal Design
Frequency Range 10 – 320MHz *
+2.5V or +3.3V Operation [+1.8V LVDS only]
Output Enable Standard
Tape and Reel Packaging, EIA-481
Part Dimensions:
7.0 × 5.0 × 2.0mm • 178.462mg
Standard Frequencies
* See Page 9 for common frequencies.
Check with factory for availability of frequencies not listed.
Applications
SerDes
Storage Area Networking
Broadband Access
SONET/SDH/DWDM
PON
Ethernet/Gbe/SyncE
Fiber Channel
Medical Electronics
Test and Measurement
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
Output Type
637
P
Frequency Code
[MHz]
X X X or XX X X
Frequency
Stability
3
Frequency
Code
1
Product Frequency Code
Code
P
L
E
V
Notes:
1]
2]
3]
4]
Output
LVPECL - Pin 1 Enable
LVDS - Pin 1 Enable
LVPECL - Pin 2 Enable
LVDS - Pin 2 Enable
Code
6
5
Stability
2
±20ppm
±25ppm
Temperature
Range
G
Supply
Voltage
3
Temp. Range
Code
-10°C to +60°C
A
-20°C to +70°C
C
-40°C to +85°C
I
3
G
-40°C to +105°C
Code
4
3
Stability
±30ppm
±50ppm
Code
2
Pack aging
T
Packing
Code
1k pcs./reel
T
Code
M
2
3
Voltage
4
+1.8Vdc
+2.5Vdc
+3.3Vdc
Stability
±100ppm
Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies
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