Model 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-418
Applications
SerDes
Storage Area Networking
Broadband Access
SONET/SDH/DWDM
PON
Ethernet/GbE/SyncE
Fiber Channel
Test and Measurement
Part Dimensions:
7.0 × 5.0 × 2.0mm • 178.462mg
Standard Frequencies
- 25.00MHz
- 125.00MHz
- 50.00MHz
- 150.00MHz
- 74.1758MHz
- 155.52MHz
- 74.25MHz
- 156.25MHz
- 100.00MHz
- 161.1328MHz
- 187.50MHz
- 200.00MHz
- 212.50MHz
- 250.00MHz
- 312.50MHz
* See Page 9 for additional developed frequencies.
Check with factory for availability of frequencies not listed.
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
Output
Type
P
Model
637
Code
P
L
E
V
[MHz]
XXX or XXXX
Output
LVPECL - Pin 1 Enable
LVDS - Pin 1 Enable
LVPECL - Pin 2 Enable
LVDS - Pin 2 Enable
Code
6
5
4
3
2
Code
Frequency
Product Frequency Code 1
Notes:
1]
2]
3]
4]
Frequency
Stability
3
Frequency Code
Temperature
Range
I
Stability
±20ppm 2
±25ppm
±30ppm
±50ppm
±100ppm
Supply
Voltage
3
Code
M
2
3
Code Temp. Range
-10°C to +60°C
A
-20°C to +70°C
C
-40°C to +85°C
I
G -40°C to +105°C 3
Packaging
T
Voltage
+1.8Vdc 4
+2.5Vdc
+3.3Vdc
Packing
Code
1k pcs./reel
T
Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies
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