Model 638
Ultra Low Jitter LVPECL or LVDS Clock
Features
Ceramic Surface Mount Package
Ultra Low Phase Jitter Performance, 100fs Typical
Fundamental or 3rd Overtone Crystal Design
Frequency Range 80 – 170MHz *
+2.5V or +3.3V Operation
Output Enable Standard
Tape and Reel Packaging, EIA-418
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, 100fs Maximum
- 125.00MHz
- 156.25MHz
- 150.00MHz
- 156.2539MHz
- 155.52MHz
- 161.1328MHz
* See Page 8 for additional developed frequencies.
Check with factory for availability of frequencies
l d
Description
CTS Model 638 is a low cost, high performance clock oscillator supporting differential LVPECL or LVDS outputs.
Employing the latest IC technology, M638 has excellent stability and low jitter/phase noise performance.
Ordering Information
Model
Output Type
638
P
Code
P
L
E
V
Frequency
Stability
3
Frequency Code
[MHz]
XXX or XXXX
Output
LVPECL - Pin 1 Enable
LVDS - Pin 1 Enable
LVPECL - Pin 2 Enable
LVDS - Pin 2 Enable
Code
6
5
3
2
Code
Frequency
Product Frequency Code
1
Temperature
Range
I
Stability
Supply
Voltage
3
Code
2
3
±20ppm 2
±25ppm
±50ppm
±100ppm
Code Temp. Range
-10°C to +60°C
A
-20°C to +70°C
C
-40°C to +85°C
I
Packaging
T
Voltage
+2.5Vdc
+3.3Vdc
Packing
Code
1k pcs./reel
T
Notes:
1] Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies
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