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ICS9LPRS464

System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

Integrated Device Technology 

ICS9LPRS464

System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUss

SRC Reference Clock

Common Recommendations for Differential Routing

Dimension or Value

L1 length, Route as non-coupled 50 ohm trace.

0.5 max

L2 length, Route as non-coupled 50 ohm trace.

N/A

L3 length, Route as non-coupled 50 ohm trace.

N/A

Rs

33

Rt

49.9

Unit Figure

inch 2

inch 2

inch 2

ohm 2

ohm 2

Down Device Differential Routing

L4 length, Route as coupled microstrip 100 ohm differential trace.

L4 length, Route as coupled stripline 100 ohm differential trace.

Dimension or Value

2 min to 16 max

1.8 min to 14.4 max

Unit Figure

inch 2

inch 2

Differential Routing to PCI Express Connector

L4 length, Route as coupled microstrip 100 ohm differential trace.

L4 length, Route as coupled stripline 100 ohm differential trace.

Dimension or Value Unit Figure

0.25 to 14 max

inch 3

0.225 min to 12.6 max inch 3

Figure 2 Down device routing.

L1

L4

L4’

L1’

Low Power Output Buffer

w/integrated series resistor

Figure 2

Figure 3 PCI Express Connector Routing.

L1

L4

L4’

L1’

Low Power Output Buffer

w/integrated series resistor

Figure 3

IDTTM/ICSTM System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

13

PCI Ex Board

Down Device

REF_CLK Input

PCI Ex

Add In Board

REF_CLK Input

1377A—04/07/08

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