ics557-05a Integrated Device Technology, ics557-05a Datasheet - Page 7

• Manufacturer Part Number: ics557-05a
• Description: Quad Differential Pci-express Clock Source
• Manufacturer: Integrated Device Technology

LVDS Compatible Layout Guidelines
LVDS Device Routing
Typical LVDS Waveform
IDT™ / ICS™ QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
ICS557-05A
QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
1000 mV
L1 length, Route as non-coupled 50 ohm trace.
L2 length, Route as non-coupled 50 ohm trace.
R
R
R
L3 length, Route as coupled 50 ohm differential trace.
L3 length, Route as coupled 50 ohm differential trace.
P
Q
T
ICS557-05A
1150 mV
LVDS Recommendations for Differential Routing
t
Output
OR
Clock
1250 mV
500 ps
1325 mV
500 ps
1250 mV
L1
L1’
1150 mV
t
OF
R
Q
R
T
L2’
L2
R
7
T
L3’
L3
Dimension or Value
0.5 max
0.2 max
100
100
150
R
P
inch
inch
ohm
ohm
ohm
Unit
Device
LVDS
Load
ICS557-05A
PCIE SSCG
REV H 092407