B-2
Computer Group Literature Center Web Site
Thermal Analysis
B
The preferred temperature measurement location for a component may be:
❏
Junction - refers to the temperature measured by an on-chip thermal
device
❏
Case - refers to the temperature at the top, center surface of the
component
❏
Air - refers to the ambient temperature near the component
Table B-1. Thermally Significant Components
Reference
Designator
Generic Description
Maximum
Allowable
Component
Temperature
(degrees C)
1
Measurement
Location
U1
Pentium III CPU
100
Junction
U15
440GX North Bridge
105
Case
U23
21554 PCI Bridge
70
Air
U32
69030 VGA
70
Air
U35, U36
82559 Ethernet
85
Case
1
maximum temperature for reliable operation specified by the component manufacturer.