Intel Pentium 4 User Manual

Schematic Review Checklist
R
258 Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide
Checklist Items Recommendations Reason/Impact
1.4 V (RAMREF)
decoupling
(300/400 MHz
RDRAM
technology)
1.35 V (RAMREF)
decoupling (533
MHz RDRAM
technology)
This plane must be decoupled in the
following manner:
• Each RIMM connector: Locally – A
value of 0.1
µF is required for local
decoupling.
• RAMREF Generation Circuit: At
resistor divider – The RAMREF
generation circuitry should be placed
near the MCH. A 75
Ω ±2% pull-up
resistor and 300
Ω ±2% pull-down
resistor is required for proper
reference voltage (1.4V) in 300/400
MHz RDRAM* technology systems.
An 84.5
Ω ±2% pull-up resistor and
255
Ω ±2% pull-down resistor is
required for proper reference voltage
(1.35V) in 533 MHz RDRAM*
technology systems.
• MCH: Locally – A value of 0.1 µF is
required for local decoupling and a
100
Ω series resistor is required near
the MCH, but before the voltage
divider circuit.
• Refer to Section 6.1.4.

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