AM186EM Datasheet, PDF (56/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

PRELIMINARY
Table 11 shows typical maximum ambient temperatures in degrees Centigrade for a PQFP package used with a
2-layer board. The typical ambient temperatures are based on a 100-degree Centigrade maximum case tempera-
ture. Figure 17 illustrates the typical temperatures in Table 11.
Table 11. Typical Ambient Temperatures for PQFP with 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
400 fpm
60.352
65.308
65.7328
70.0162
74.04
77.285
79.232
81.828
600 fpm
67.786
72.1579
78.9075
83.126
90
Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
s 20 MHz
s
s
80
s
x
x
s
x
I
70
x
I
q
I
q
60
I
q
q
50
40
0 fpm
200 fpm
400 fpm
Airflow (Linear Feet Per Minute)
600 fpm
Figure 17. Typical Ambient Temperatures for PQFP with 2-Layer Board
56
Am186/188EM and Am186/188EMLV Microcontrollers