AM188ES-40KCW Datasheet, PDF (58/102 Pages) Advanced Micro Devices – High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers

PRELIMINARY
Table 14 shows typical maximum ambient temperatures in degrees Centigrade for a TQFP package used on a 2-
layer board. The typical ambient temperatures are based on a 100-degree Centigrade maximum case temperature.
Figure 16 graphically illustrates the typical temperatures in Table 14.
Table 14. Typical Ambient Temperatures for TQFP 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
43.006
50.7409
62.6825
70.146
Linear Feet per Minute Airflow
200 fpm
55.396
61.4494
70.795
76.636
400 fpm
62.83
67.8745
75.6625
80.53
600 fpm
65.308
70.0162
77.285
81.828
90
Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
s 20 MHz
s
80
s
s
x
x
70
s
x
I
I
q
x
I
q
60
q
I
50
q
40
0 fpm
200 fpm
400 fpm
Airflow (Linear Feet Per Minute)
600 fpm
Figure 16. Typical Ambient Temperatures for TQFP with a 2-Layer Board
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Am186/188ES and Am186/188ESLV Microcontrollers