9db233 Integrated Device Technology, 9db233 Datasheet - Page 7

• Manufacturer Part Number: 9db233
• Description: Two Output Differential Buffer For Pcie Gen3
• Manufacturer: Integrated Device Technology

IDT
9DB233
Two Output Differential Buffer for PCIe Gen3
®
Two Output Differential Buffer for PCIe Gen3
L1 length, route as non-coupled 50ohm trace
L2 length, route as non-coupled 50ohm trace
L3 length, route as non-coupled 50ohm trace
Rs
Rt
L4 length, route as coupled microstrip 100ohm differential trace 2 min to 16 max
L4 length, route as coupled stripline 100ohm differential trace
L4 length, route as coupled microstrip 100ohm differential trace 0.25 to 14 max
L4 length, route as coupled stripline 100ohm differential trace
Figure 1: Down Device Routing
HCSL Output Buffer
Figure 2: PCI Express Connector Routing
Common Recommendations for Differential Routing
HCSL Output Buffer
Differential Routing to PCI Express Connector
Down Device Differential Routing
L1'
L1
L1'
L1
Rs
Rs
Rs
Rs
SRC Reference Clock
L2'
L2
L2'
L2
7
Rt
L3'
Rt
L3'
L3
Rt
0.5 max
0.2 max
0.2 max
33
49.9
1.8 min to 14.4 max
0.225 min to 12.6 max
L3
Dimension or Value
Rt
L4'
L4
L4'
L4
REF_CLK Input
Add-in Board
PCI Express
REF_CLK Input
Down Device
PCI Express
ohm
ohm
Unit
inch
inch
inch
inch
inch
inch
inch
Datasheet
Figure
1667C—04/20/11
1
1
1
1
1
1
1
2
2