Intel Pentium 4 User Manual

Intel® Pentium® 4 Processor in the 478-Pin Package Processor Power Distribution Guidelines
R
226 Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide
Figure 169. Filter Recommendation
0 dB
-28 dB
-34 dB
0.2 dB
0.5 dB
1 MHz 66 MHz fcorefpeak1 HzDC
passband
high frequency
band
PLL_Filter_Spec
Forbidden
Zone
Forbidden
Zone
NOTES:
1. Diagram not to scale.
2. No specification for frequencies beyond fcore (core frequency).
3. fpeak, if existent, should be less than 0.05 MHz.
Other Recommendations
• Use shielded type inductors to reduce crosstalk
• Capacitors for the filter can be any value between 22 µF and 100 µF as long components with
ESL ≤ 5 nH and ESR < 0.3 Ω are used.
• Values of either 4.7 uH or 10 uH may be used for the inductor. Filter should support
DC current > 60 mA
• DC voltage drop from VCC_CPU to VCCA should be < 60 mV
• In order to maintain a DC drop of less than 60 mV, the total DC resistance of the filter from
VCC_CPU to the processor socket should be a maximum of 1 Ω.
Other Routing Requirements
• C should be within 600 mils of the VCCA and VSSA pins. An example of the component
placement is shown in Figure 170.
• VCCA route should be parallel and next to VSSA route (minimize loop area)
• A minimum of a 12 mil trace should be used to route from the filter to the processor pins.
• L should be close to C

Intel Pentium 4 Specifications

General

Architecture	x86
Core Count	1
Microarchitecture	NetBurst
Manufacturer	Intel
Core Names	Willamette, Northwood, Prescott, Cedar Mill
Virtualization Technology	No
Release Date	November 20, 2000
Clock Speed	1.3 GHz to 3.8 GHz
FSB Speed	400 MHz to 1066 MHz
Socket	Socket 423, Socket 478, LGA 775
Introduced	2000
Product Line	Pentium
Front Side Bus	400 MHz to 1066 MHz
Hyper-Threading	Yes (Prescott and later)
64-bit Support	Yes (Prescott and later)
Instruction Set	MMX, SSE, SSE2, SSE3
Discontinued	2008
Process Technology	180 nm, 130 nm, 90 nm, 65 nm
L2 Cache	256 KB, 512 KB, 1 MB, 2 MB
Lithography	180 nm, 130 nm, 90 nm, 65 nm
L1 Cache	8 KB