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AM186 数据表(PDF) 61 Page - Advanced Micro Devices

部件名 AM186
功能描述  High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM
PDF  112 Pages
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM186 数据表(HTML) 61 Page - Advanced Micro Devices

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Am186TMER and Am188TMER Microcontrollers Data Sheet
61
DRAF
T
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.
θ
JA is the sum of θJC and θCA . θJC is the internal
thermal resistance of the assembly.
θ
CA is the case to
ambient thermal resistance.
The variable P is power in watts. Typical power
supply current (ICC) for the Am186ER and Am188ER
microcontrollers is 3.7 mA per MHz of clock frequency.
Figure 16.
Thermal Resistance (
°C/Watt)
Figure 17. Thermal Characteristics Equations
Table 10.
Thermal Characteristics (
°C/Watt)
θ
JA
θ
CA
θ
JC
θ
JA = θJC + θCA
TC
Package/Board
Airflow
(Linear Feet
per Minute)
θ
JC
θ
CA
θ
JA
PQFP/2-Layer
0 fpm
7
38
45
200 fpm
7
32
39
400 fpm
7
28
35
600 fpm
7
26
33
TQFP/2-Layer
0 fpm
10
46
56
200 fpm
10
36
46
400 fpm
10
30
40
600 fpm
10
28
38
PQFP/4-Layer
to 6-Layer
0 fpm
5
18
23
200 fpm
5
16
21
400 fpm
5
14
19
600 fpm
5
12
17
TQFP/4-Layer
to 6-Layer
0 fpm
6
24
30
200 fpm
6
22
28
400 fpm
6
20
26
600 fpm
6
18
24
θ
JA = θJC + θCA
P = ICC ⋅ freq (MHz) ⋅ VCC
TJ = TC + (P ⋅ θJC)
TJ = TA + (P ⋅ θJA)
TC = TJ – (P ⋅ θJC)
TC = TA + (P ⋅ θCA)
TA = TJ – (P ⋅ θJA)
TA = TC – (P ⋅ θCA)



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