Datasheet
CPC945 Bridge and Memory Controller
Preliminary
Table 2-2 and Figure 2-2 describe the allowable forces for the CPC945 package. The heat sink design must
not exceed these static or dynamic forces.
Table 2-2. Allowable Forces on the CPC945 Package
Callout
Number
Characteristic
Symbol
FC
Maximum
Unit1
Note
Static
0.53
39
N
N
N
N
N
N
N
N
2
2
2
2
1
Compressive force on the die
Dynamic
Static
0.53
N/A
463
3.48
0.57
N/A
2
3
Tensile force on the die
FT
FBGA
FT
Dynamic
Static
Compressive force on the ball grid array (BGA) balls
Tensile force on the BGA balls
Dynamic
Static
3
4
Dynamic
Note:
1. One newton = 0.2248089 pound-force.
2. This force might be limited by the BGA limit.
3. The maximum force value for callout item 3 must include the force value for callout item 1.
Figure 2-2. Force Diagram for the CPC945 Package
2
1
3
4
die
Note: The legend for this figure is provided by callout number in Table 2-2.
Overview
A15-6009-03
December 18, 2007 - IBM Confidential
Page 20 of 69
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