Intel Pentium 4 User Manual

Power Distribution Guidelines
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 231
Table 55. Intel
®
850 Chipset and Intel
®
ICH2 Thermal Design Power
Parameter Icc Max Sustainable
Current (A) S0)
MCH
• MCH (UP) Typical Thermal Design Power = 5.8 W
• MCH (UP) Maximum Thermal Design Power = 8.0 W
1.8 V Core 3.2
1.5 V VDDQ AGP I/O 0.37
1.6 V VTT 2.2
ICH2
• Max Thermal Design Power = 1.6 W ±15%
1.8 V Main Logic 0.30
1.8 V (Stand By) Resume Logic + 1.8 V LAN 0.040
3.3 V Main I/O 0.41
3.3 V (Stand By) Resume Logic 0.062
RTC .04 (G3)
Processor I/F (1.3 ~ 2.5) 200 uA
NOTE: Remember that values stated for the maximum sustainable current (Icc) of the ICH2 are maximum
preliminary measurements, and are subject to change.
12.3 1.8 V RAC Isolation Solution
The MCH requires a low-pass filter on the VccRAC pins to meet clock jitter specifications. The
two possible filter solutions may be configured as either an inductor-capacitor (LC) or ferrite
bead-capacitor filters. For more details, see Figure 172 and Figure 173. The inductor or ferrite
bead must have a minimum current capacity of 500 mA and a maximum DC resistance of 100 mΩ.
DC drop is a concern due to the series element between the RAC and 1.8 V supply. The VccRAC
pins for the MCH are given in Table 56.
Figure 172. Inductor-Capacitor Filter Circuit
1.8 V
L
C1
C2
Vcc
Core
VccRAC
MCH
Ind_Cap_Filter

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