AM29240EH AMD [Advanced Micro Devices], AM29240EH Datasheet - Page 33

• Manufacturer Part Number: AM29240EH
• Description: Enhanced High-Performance RISC Microcontrollers
• Manufacturer: AMD [Advanced Micro Devices]

SWITCHING TEST CIRCUIT
THERMAL CHARACTERISTICS
The Am29240EH microcontroller series is specified for
operation with case temperature ranges for a commercial
temperature device. Case temperature is measured at
the top center of the PQFP package as shown in Figure
13.
*All outputs except MEMCLK. MEMCLK is tested with I
Note:
Figure 13. Thermal Resistance — C/Watt
É É É É
V
JA
JA
=
T
VREF = 1.5 V
Table 2. Thermal Characteristics ( C/Watt) Surface Mounted
C
JC
JC
+
Parameter
CA
JC
JA
CA
CA
Am29240 EH Microcontroller Series
Junction-to-Ambient
Junction-to-Case
Case-to-Ambient
V
V
L
H
P R E L I M I N A R Y
I
OL
I
OH
OL
= 3.2 mA *
= 400 A *
= 20 mA and I
The various temperatures and thermal resistances can
be determined using the equations shown in Figure 14
along with information given in Table 2. (The variable P
is power in watts.)
Figure 14. Thermal Characteristics Equations
C
OH
L
= –20mA.
Am29240EH Microcontroller
C/Watt
P = I
T
T
T
T
T
T
38
30
JA
A
A
8
J
J
C
C
Pin Under Test
= T
= T
= T
= T
= T
= T
=
CCOP
A
C
A
J
C
J
JC
+ P
– P
+ P
– P
+ P
– P
+
freq V
CA
JA
JA
JC
JC
CA
CA
CC
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