Custom Solutions; No Discrete R; Core Reference Model - Intel 810A3 Design Manual

Figure 4-32. No Discrete R
VCC
Trace Resistance
4.14.5

Custom Solutions

As long as filter performance as specified in
Section 4.14.3, "Filter Specification" on page 4-28
Custom solutions should be simulated against a standard reference core model, which is shown in
Figure 4-33.
Figure 4-33. Core Reference Model
NOTES:
1. 0.1 Ω resistors represent package routing
2. 120 pF capacitor represents internal decoupling capacitor.
3. 1 KΩ resistor represents small signal PLL resistance.
4. Be sure to include all component and routing parasitics.
5. Sweep across component/parasitic tolerances.
6. To observe IR drop, use DC current of 30 mA and minimum VCC
1. For other modules (interposer, DMM, etc), adjust routing resistor if desired, but use minimum numbers.
®
Intel 810A3 Chipset Design Guide
CORE
PLL1
PLL2
L
<0.1 ohm route
C
<0.1 ohm route
Figure 4-30 and other requirements outlined in
are satisfied, other solutions are acceptable.
0.1 ohm
120pF
0.1 ohm
1
.
CORE
Layout and Routing Guidelines
PLL1
370-Pin
Socket
PLL2
Processor
1K ohm
level.
4-31