mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 1186

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Appendix A Electrical Characteristics
1. The values for thermal resistance are achieved by package simulations
2. Junction to ambient thermal resistance, θ
3. Junction to ambient thermal resistance, θ
4. Junction to case thermal resistance was simulated to be equivalent to the measured values using the cold plate technique with
5. Thermal characterization parameter Ψ
1186
Num
10
11
12
13
14
15
horizontal configuration in natural convection.
horizontal configuration in natural convection.
the cold plate temperature used as the “case” temperature. This basic cold plate measurement technique is described by MIL-
STD 883D, Method 1012.1. This is the correct thermal metric to use to calculate thermal performance when the package is
being used with a heat sink.
case as defined in JESD51-2. Ψ
enviroment.
1
2
3
4
5
6
7
8
9
C
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
Thermal resistance LQFP144, single sided PCB
Thermal resistance LQFP144, double sided PCB
with 2 internal planes
Junction to Board LQFP 144
Junction to Case LQFP 144
Junction to Package Top LQFP144
Thermal resistance LQFP112, single sided PCB
Thermal resistance LQFP112, double sided PCB
with 2 internal planes
Junction to Board LQFP112
Junction to Case LQFP112
Junction to Package Top LQFP112
Thermal resistance LQFP 64, single sided PCB
Thermal resistance LQFP 64, double sided PCB
with 2 internal planes
Junction to Board LQFP 64
Junction to Case LQFP 64
Junction to Package Top LQFP 64
Table A-5. Thermal Package Characteristics (
3
(3)
3
JT
Rating
is a useful value to use to estimate junction temperature in a steady state customer
MC9S12XF - Family Reference Manual, Rev.1.19
(4)
4
JT
4
is the “resistance” from junction to reference point thermocouple on top center of the
JA
JA
was simulated to be equivalent to the JEDEC specification JESD51-2 in a
was simulated to be equivalent to the JEDEC specification JESD51-7 in a
(5)
5
5
LQFP144
LQFP112
LQFP64
2
2
(2)
Symbol
Ψ
Ψ
Ψ
θ
θ
θ
θ
θ
θ
θ
θ
θ
θ
θ
θ
JC
JC
JC
JA
JA
JB
JA
JA
JB
JA
JA
JB
JT
JT
JT
MC9S12XF
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
512
)
(1)
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Freescale Semiconductor
Max
48
40
28
49
40
28
62
44
27
10
9
2
9
2
2
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Unit