ICS557-05A Datasheet, PDF (7/12 Pages) Integrated Circuit Systems – Quad Differential PCI-Express Clock Source

ICS557-05A
QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
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 Unit
0.5 max
inch
0.2 max
inch
100
ohm
100
ohm
150
ohm
PCIE SSCG
LVDS Device Routing
ICS557-05A
Clock
Output
L1
R_Q
L1’
R_T
L3
L3’
R_T
L2’ L2
R_P
LVDS
Device
Load
Typical LVDS Waveform
1325 mV
1000 mV
t_OR
500 ps
1250 mV
1150 mV
500 ps
t_OF
1250 mV
1150 mV
IDT™ / ICS™ QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
7
ICS557-05A REV H 092407