AM188ES-40KCW Datasheet, PDF (57/102 Pages) Advanced Micro Devices – High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers

PRELIMINARY
Table 13 shows typical maximum ambient temperatures in degrees Centigrade for a PQFP package used on a 2-
layer board. The typical ambient temperatures are based on a 100-degree Centigrade maximum case temperature.
Figure 15 graphically illustrates the typical temperatures in Table 13.
Table 13. Typical Ambient Temperatures for PQFP with a 2-Layer Board
Microcontroller
Speed
40 MHz
33 MHz
25 MHz
20 MHz
Typical Power
(Watts)
1.239
1.07085
0.81125
0.649
0 fpm
52.918
59.3077
69.1725
75.338
Linear Feet per Minute Airflow
200 fpm
60.352
65.7328
74.04
79.232
400 fpm
65.308
70.0162
77.285
81.828
600 fpm
67.786
72.1579
78.9075
83.126
90
s
s
80
s
x
x
s
x
I
70
x
I
q
I
q
60
I
q
Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
s 20 MHz
q
50
40
0 fpm
200 fpm
400 fpm
600 fpm
Airflow (Linear Feet Per Minute)
Figure 15. Typical Ambient Temperatures for PQFP with a 2-Layer Board
Am186/188ES and Am186/188ESLV Microcontrollers
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