AM186ED AMD [Advanced Micro Devices], AM186ED Datasheet - Page 51

• Manufacturer Part Number: AM186ED
• Description: High Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers
• Manufacturer: AMD [Advanced Micro Devices]

THERMAL CHARACTERISTICS
TQFP Package
The Am186ED microcontroller is specified for
operation with case temperature ranges from 0 C to
+100 C for a commercial device. Case temperature is
measured at the top center of the package as shown in
Figure 13. The various temperatures and thermal
resistances can be determined using the equations in
Figure 14 with information given in Table 11.
The total thermal resistance is
and
JC
, the internal thermal resistance of the assembly,
CA
, the case to ambient thermal resistance.
PQFP/2-Layer
TQFP/2-Layer
PQFP/4-Layer
to 6-Layer
TQFP/4-Layer
to 6-Layer
Package/Board
Figure 14. Thermal Characteristics Equations
JA
Table 11. Thermal Characteristics ( C/Watt)
;
JA
Am186ED/EDLV Microcontrollers
is the sum of
P R E L I M I N A R Y
P=I
T
T
T
T
T
T
JA
A
A
J
J
C
C
=T
=T
=T
=T
=T
=T
(Linear Feet
per Minute)
CC
=
200 fpm
400 fpm
600 fpm
200 fpm
400 fpm
600 fpm
200 fpm
400 fpm
600 fpm
200 fpm
400 fpm
600 fpm
Airflow
A
C
J
C
A
J
0 fpm
0 fpm
0 fpm
0 fpm
+ ( P
–( P
+( P
–( P
JC
+( P
–( P
freq (MHz)
+
CA
JA
JC
JC
CA
CA
JA
The variable P is power in watts. Power supply current
(I
CC)
)
)
)
)
)
)
45
39
35
33
56
46
40
38
23
21
19
17
30
28
26
24
is in mA per MHz of clock frequency.
Figure 13. Thermal Resistance( C/Watt)
JA
V
CC
10
10
10
10
7
JC
7
7
7
5
5
5
5
6
6
6
6
JA
38
32
28
26
46
36
30
28
18
16
14
12
24
22
20
18
CA
JA
=
T
JC
C
+
JC
CA
CA
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