ICS557-01
PCI-E
XPRESS
C
LOCK
S
OURCE
LVDS Compatible Layout Guidelines
LVDS Recommendations for Differential Routing
L1 length, Route as non-coupled 50 ohm trace.
L2 length, Route as non-coupled 50 ohm trace.
R
P
R
Q
R
T
L3 length, Route as coupled 50 ohm differential trace.
L3 length, Route as coupled 50 ohm differential trace.
Dimension or Value
0.5 max
0.2 max
100
100
150
Unit
inch
inch
ohm
ohm
ohm
Figure 3: LVDS Device Routing
L1
R
Q
L1’
L3
L3’
R
P
R
T
ICS557-01
Clock
Output
L2’
L2
R
T
LVDS
Device
Load
Typical LVDS Waveform
1325 mV
1000 mV
t
OR
500 ps
500 ps
t
OF
1250 mV
1150 mV
1250 mV
1150 mV
MDS 557-01 F
In te grated Circuit Systems
●
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