AM186ES-20VC/W AMD [Advanced Micro Devices], AM186ES-20VC/W Datasheet - Page 55

• Manufacturer Part Number: AM186ES-20VC/W
• Description: High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers
• Manufacturer: AMD [Advanced Micro Devices]

THERMAL CHARACTERISTICS
TQFP Package
The Am186ES and Am188ES microcontrollers are
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
pack age 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 10.
the internal thermal resistance of the assembly, and
JA
CA
, the case to ambient thermal resistance.
is the total thermal resistance.
PQFP/2-Layer
TQFP/2-Layer
PQFP/4-Layer
to 6-Layer
TQFP/4-Layer
to 6-Layer
Am186/188ES and Am186/188ESLV Microcontrollers
Package/Board
Figure 14. Thermal Characteristics Equations
Table 10. Thermal Characteristics ( C/Watt)
JA
is the sum of
P R E L I M I N A R Y
P=I
T
T
T
T
T
T
JA
J
J
C
C
A
A
=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
C
A
J
C
J
A
0 fpm
0 fpm
0 fpm
0 fpm
JC
–( P
+( P
+ ( P
–( P
JC
+( P
–( P
freq (MHz)
,
+
CA
JA
JC
JC
CA
CA
JA
The variable P is power in watts. Typical power supply
current (I
)
)
)
)
)
)
Figure 13. Thermal Resistance( C/Watt)
45
39
35
33
56
46
40
38
23
21
19
17
30
28
26
24
JA
V
CC
CC)
is TBD mA per MHz of clock frequency.
10
10
10
10
7
7
7
7
5
5
5
5
6
6
6
6
JC
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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