ICS9FG104D Datasheet, PDF (13/17 Pages) Integrated Device Technology – Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA

ICS9FG104D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
DIF Reference Clock
Common Recommendations for Differential Routing
Dimension or Value
L1 length, route as non-coupled 50ohm trace
0.5 max
L2 length, route as non-coupled 50ohm trace
0.2 max
L3 length, route as non-coupled 50ohm trace
0.2 max
Rs
33
Rt
49.9
Down Device Differential Routing
L4 length, route as coupled microstrip 100ohm differential trace 2 min to 16 max
L4 length, route as coupled stripline 100ohm differential trace 1.8 min to 14.4 max
Differential Routing to PCI Express Connector
L4 length, route as coupled microstrip 100ohm differential trace 0.25 to 14 max
L4 length, route as coupled stripline 100ohm differential trace 0.225 min to 12.6 max
Unit Figure
inch 1
inch 1
inch 1
ohm 1
ohm 1
inch 1
inch 1
inch 2
inch 2
Figure 1: Down Device Routing
L1
L2
Rs
L1'
HCSL Output Buffer
L2'
Rs
Rt
L4
L4'
Rt
L3' L3
PCI Express
Down Device
REF_CLK Input
Figure 2: PCI Express Connector Routing
L1
L2
Rs
L1'
HCSL Output Buffer
L2'
Rs
Rt
L4
L4'
Rt
PCI Express
Add-in Board
REF_CLK Input
L3' L3
IDT^® Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
13
1541C—12/16/10