Specifications
x
CG635 Synthesized Clock Generator
Optional Receiver Modules
General
Inputs
RJ-45. Connects to CG635 via standard Category-6 cable.
Outputs
Q / Q
¯ on SMA connectors
Dimensions
1 5/8” × 1” × 3” (WHD)
Models
Model Levels
Source
Impedance
Termination
Impedance
Transition
Time (max)
F
max
(2)
CG640
+5 V CMOS
50
ȍ
High Z
2.0 ns
105 MHz
(1)
CG641 +3.3
V
CMOS 50
ȍ
High Z
800 ps
250 MHz
CG642 +2.5
V
CMOS 50
ȍ
High Z
800 ps
250 MHz
CG643
+5 V PECL
50
ȍ
High Z
800 ps
250 MHz
CG644 +3.3
V
PECL
50
ȍ
50
ȍ
100 ps
2.05 GHz
CG645 +2.5
V
PECL
50
ȍ
50
ȍ
100 ps
2.05 GHz
CG646
+7 dBm RF
50
ȍ
50
ȍ
100 ps
2.05 GHz
CG647 CML/NIM
50
ȍ
50
ȍ
100 ps
2.05 GHz
CG648 NEG
ECL
50
ȍ
50
ȍ
100 ps
2.05 GHz
CG649 LVDS
50
ȍ
50
ȍ
100 ps
2.05 GHz
Notes
:
(1) Output is set to logic ‘0’ above F
max
.
(2) Except for the CG640, all outputs continue to operate above F
max
with reduced amplitude.
Maximum operating frequency is also limited by the CAT-6 cable length. At 2 GHz, cable
lengths up to 10 feet may be used. At 10 MHz, cable lengths of up to 200 feet may be used.
See Figure 3 on page 11 for the maximum recommended cable lengths at other frequencies.
