AM186ER-25KCW AMD [Advanced Micro Devices], AM186ER-25KCW Datasheet - Page 61

• Manufacturer Part Number: AM186ER-25KCW
• Description: High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM
• Manufacturer: AMD [Advanced Micro Devices]

THERMAL CHARACTERISTICS
TQFP Package
The Am186ER and Am188ER microcontrollers are
specified for operation with case temperature ranges
from 0 C to +100 C for a commercial temperature
device. Case temperature is measured at the top
center of the package as shown in Figure 16. The
various temperatures and thermal resistances can be
determined using the equations in Figure 17 with
information given in Table 10.
thermal resistance of the assembly.
ambient thermal resistance.
JA
is the sum of
JC
and
Am186
Package/Board
PQFP/2-Layer
TQFP/2-Layer
PQFP/4-Layer
to 6-Layer
TQFP/4-Layer
to 6-Layer
CA
Figure 17. Thermal Characteristics Equations
Table 10. Thermal Characteristics ( C/Watt)
.
TM
ER and Am188
JC
CA
is the internal
is the case to
P = I
T
T
T
T
T
T
JA
A
A
J
J
C
C
(Linear Feet
per Minute)
= T
= T
= T
= T
= T
= T
=
TM
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
CC
0 fpm
0 fpm
0 fpm
0 fpm
ER Microcontrollers Data Sheet
C
A
C
J
J
A
JC
– (P
+ (P
+ (P
– (P
– (P
+ (P
freq (MHz) V
+
The variable P is power in watts. Typical power
supply current (I
microcontrollers is 3.7 mA per MHz of clock frequency.
CA
JA
JA
JC
CA
JC
CA
Figure 16. Thermal Resistance ( C/Watt)
)
)
)
)
)
)
10
10
10
10
7
7
7
7
5
5
5
5
6
6
6
6
JC
CC
38
32
28
26
46
36
30
28
18
16
14
12
24
22
20
18
CA
CC
) for the Am186ER and Am188ER
JA
JA
=
45
39
35
33
56
46
40
38
23
21
19
17
30
28
26
24
JA
T
JC
C
+
JC
CA
CA
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