AM186EM Datasheet, PDF (58/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

PRELIMINARY
Table 13 shows typical maximum ambient temperatures in degrees Centigrade for a PQFP 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 19 illustrates the typical temperatures in Table 13.
Table 13. Typical Ambient Temperatures for PQFP 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
77.698
80.7247
85.3975
88.318
Linear Feet per Minute Airflow
200 fpm
400 fpm
80.176
82.654
82.8664
85.0081
87.02
88.6425
89.616
90.914
600 fpm
85.132
87.1498
90.265
92.212
95
90
s
x
85
Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
s 20 MHz
I
80
q
75
70
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 19. Typical Ambient Temperatures for PQFP with 4-Layer to 6-Layer Board
58
Am186/188EM and Am186/188EMLV Microcontrollers