Model 637
Low Jitter
LVPECL or LVDS Clock Oscillator
FEATURES
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Standard 7.0mm x 5.0mm, 6-Pad Surface Mount Package
Low Phase Jitter, 0.5ps RMS Maximum
LVPECL or LVDS Output
Fundamental and 3rd Overtone Crystal Designs
Frequency Range 19.44 – 320 MHz
Frequency Stability ±50 ppm Standard
Operating Voltages +2.5Vdc or +3.3Vdc
Operating Temperature to -40°C to +85°C
Output Enable Standard
Tape & Reel Packaging Standard, EIA-418
RoHS/Green Compliant [6/6]
APPLICATIONS
Model 637 is ideal for applications such as broadband access, SerDes, Ethernet/Gigabit Ethernet, SONET/SDH
and optical networking.
ORDERING INFORMATION
637
OUTPUT TYPE
P = LVPECL - Pin 1 Enable [std]
L = LVDS - Pin 1 Enable [std]
E = LVPECL - Pin 2 Enable [opt]
V = LVDS - Pin 2 Enable [opt]
PACKAGING
T - 1k pcs./reel
SUPPLY VOLTAGE
2 = 2.5 Vdc
3 = 3.3 Vdc
FREQUENCY
Product Frequency Code
1
OPERATING TEMPERATURE RANGE
A = -10°C to +60°C
C = -20°C to +70°C
I = -40°C to +85°C 2
FREQUENCY STABILITY
6
5
3
2
=
=
=
=
±
±
±
±
20 ppm 2
25 ppm
50 ppm
100 ppm
1] Refer to document 016-1454-0, Frequency Code Tables.
3-digits required for frequencies below 100MHz and 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.
PACKAGING INFORMATION [reference]
Device quantity is 1k pcs. maximum per 180mm reel.
Document No. 008-0453-0
Page 1- 3
www.ctscorp.com
Rev. A
