80960CA-25 Datasheet, PDF (19/62 Pages) Intel Corporation – SPECIAL ENVIRONMENT 80960CA-25, -16 32-BIT HIGH-PERFORMANCE EMBEDDED PROCESSOR

SPECIAL ENVIRONMENT 80960CA-25 -16
3 4 Package Thermal Specifications
The 80960CA is specified for operation when T_C
(case temperature) is within the range of ^b40 C –
a_{110 C TC may be measured in any environment}
to determine whether the 80960CA is within speci-
fied operating range Case temperature should be
measured at the center of the top surface opposite
the pins Refer to Figure 4
T_A (ambient temperature) can be calculated from
i_CA (thermal resistance from case to ambient) using
the following equation
T_A ^e T_C ^b P i_CA
Table 8 shows the maximum T_A allowable (without
exceeding T_C) at various airflows and operating fre-
quencies (f_PCLK)
Note that T_A is greatly improved by attaching fins or
a heatsink to the package P (maximum power con-
sumption) is calculated by using the typical I_CC as
tabulated in Section 4 4 DC Specifications and
V_CC of 5V
271327 – 4
Figure 4 Measuring 80960CA PGA Case Temperature
T_A with
Heatsink
T_A without
Heatsink
Table 8 Maximum T_A at Various Airflows in C
Airflow-ft min (m sec)
f_PCLK
0
200
400
600
(MHz)
(0)
(1 01)
(2 03)
(3 04)
33
51
66
79
81
25
61
73
83
85
16
74
82
89
90
33
36
47
59
66
25
49
58
67
73
16
66
72
78
82
800
(4 06)
85
88
92
73
78
86
NOTES
0 285 high undirectional heatsink (Al alloy 6061 50 mil fin width 150 mil center-to-center fin spacing)
1000
(5 07)
87
89
93
75
80
87
19