AM186EM Datasheet, PDF (59/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

PRELIMINARY
Table 14 shows typical maximum ambient temperatures in degrees Centigrade for a TQFP package used with a
4-layer to 6-layer board. The typical ambient temperatures are based on a 100-degree Centigrade maximum case
temperature. Figure 20 illustrates the typical temperatures in Table 14.
Table 14. Typical Ambient Temperatures for TQFP with 4-Layer to 6-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
70.264
74.2996
80.53
84.424
Linear Feet per Minute Airflow
200 fpm
400 fpm
72.742
75.22
76.4413
78.583
82.1525
83.775
85.722
87.02
600 fpm
77.698
80.7247
85.3975
88.318
95
90
85
s
x
80
Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
s 20 MHz
75
I
70
q
0 fpm
s
s
x
x
I
I
q
q
200 fpm
400 fpm
Airflow (Linear Feet Per Minute)
s
x
I
q
600 fpm
Figure 20. Typical Ambient Temperatures for TQFP with 4-Layer to 6-Layer Board
Am186/188EM and Am186/188EMLV Microcontrollers
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