AM186ED Datasheet, PDF (53/88 Pages) Advanced Micro Devices – High Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers

PRELIMINARY
Table 14 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 14.
Table 14. Typical Ambient Temperatures (°C) for PQFP with a 2-Layer Board
Microcontroller
Speed
40 MHz
33 MHz
25 MHz
20 MHz
Typical Power
(Watts)
1.2
1.0
0.7
0.6
0 fpm
55.2
63.0
72.0
77.6
Linear Feet per Minute Airflow
200 fpm
62.2
68.8
76.4
81.1
400 fpm
67.0
72.7
79.4
83.5
600 fpm
69.3
74.7
80.8
84.7
90
A ^{F T} _Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
D ^{R s 20MHz}
s
s
80
s
x
x
s
x
I
I
x
70
I
q
q
I
q
60
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
Am186ED/EDLV Microcontrollers
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