AM186ED Datasheet, PDF (55/88 Pages) Advanced Micro Devices – High Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers

PRELIMINARY
Table 16 shows typical maximum ambient temperatures in degrees Centigrade for a PQFP package used on a 4-
layer to 6-layer board. The typical ambient temperatures are based on a 100-degree Centigrade maximum case
temperature. Figure 17 graphically illustrates the typical temperatures in Table 16.
Table 16. Typical Ambient Temperatures (°C) for PQFP with a 4-Layer to 6-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
78.8
82.5
86.7
89.4
Linear Feet per Minute Airflow
200 fpm
81.1
84.4
88.2
90.6
400 fpm
83.5
86.4
89.7
91.7
600 fpm
85.8
88.3
91.2
92.9
95
s
s
s
x
90
s
x
x
I
x
I
q
T ₈₅
I
q
I
q
F 80
q
A ^Legend:
q 40 MHz
H 33 MHz
x 25 Mhz
R ^{s 20MHz}
75
70
0 fpm
200 fpm
400 fpm
600 fpm
Airflow (Linear Feet Per Minute)
D^{Figure 17. Typical Ambient Temperatures for PQFP with a 4-Layer to 6-Layer Board}
Am186ED/EDLV Microcontrollers
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