80960CF-40 Datasheet, PDF (25/77 Pages) Intel Corporation – 80960CF-40, -33, -25, -16 32-BIT HIGH-PERFORMANCE SUPERSCALAR EMBEDDED MICROPROCESSOR

A
98
99
80960CF-40, -33, -25, -16
50
49
147
Pin 1
148
196
Figure 4. 80960CF PQFP Pinout—Top View (80960CF-33, -25, -16 Only)
F_CA004A
3.4 Package Thermal Specifications
The 80960CF is specified for operation when T_C
(case temperature) is within the range of 0°C–100°C
for 33, 25, and 16 MHz and 0°C–85°C for 40 MHz.
T_C may be measured in any environment to deter-
mine whether the 80960CF is within specified oper-
ating range. Case temperature should be measured
at the center of the top surface, opposite the pins.
Refer to Figure 5.
T_A (ambient temperature) is calculated from θ_CA
(thermal resistance from case to ambient) using the
equation:
T_A = T_C – P*θ_CA
Table 9 shows the maximum T_A allowable (without
exceeding T_C) at various airflows and operating
frequencies (f_PCLK).
Note that T_A is greatly improved by attaching fins or
a heatsink to the package. P (maximum power
consumption) is calculated by using the typical I_CC
as tabulated in Section 4.4, DC Specifications and
V_CC of 5 V.
PRELIMINARY
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