Guide

6 Intel
®
Celeron
®
D Processor for Embedded Applications Thermal Design Guide
Introduction
1.3 Document Scope
This document discusses the thermal management techniques for the Intel Celeron D Processor,
specifically in embedded computing applications. The physical dimensions and power numbers
used in this document are for reference only. Refer to the processor’s datasheet for the product
dimensions, thermal power dissipation, and maximum case temperature. In case of conflict, the
information in the datasheet supercedes any data in this document.
1.4 Related Documents
1.5 Definitions of Terms
Table 1. Related Documents
Document Title Reference Number
Intel
®
Celeron
®
D Processor Datasheet 302253
Intel
®
Pentium
®
4 Processor on 90 nm Process Thermal and Mechanical Design
Guidelines
300564
Intel
®
Pentium
®
4 Processor 478-pin Socket (mPGA478) Design Guidelines 249890
Table 2. Definitions of Terms
Term Definition
Bypass/no-bypass
Bypass is the area between a heatsink and any object that may act to form a
duct. For this example it may be expressed as a dimension away from the outside
dimension of the fins to the nearest surface.
CFM Cubic Feet per Minute
HT
Hyper-threading; hyper-threading technology allows a single, physical processor
to function as two logical processors.
LFM Linear Feet per Minute
m478B Socket
The surface mount Zero Insertion Force (ZIF) socket designed to accept the Intel
Celeron D Processor.
P
Max
The maximum processor power (theoretical maximum power).
T
Ambient-External
The measured ambient temperature at the OEM-defined external system
location.
T
Ambient-Max
The target worst case local ambient temperature. To determine this, place the
system in a maximum external temperature environment, and measure the
ambient temperature surrounding the processor. Under these conditions,
T
LA
= T
Ambient-Max
.
T
Ambient-OEM
The target worst-case ambient temperature at a given external system location
as defined by the Original Equipment Manufacturer (OEM).
T
C
The measured case temperature of the processor.
T
CMax
The maximum case temperature of the processor, as specified in the processor
datasheet.