|
MC9S12E256 Datasheet, PDF (565/602 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers | |||
|
◁ |
Appendix A Electrical Characteristics
Two cases with internal voltage regulator enabled and disabled must be considered:
1. Internal Voltage Regulator disabled
PINT = IDD â
VDD + IDDPLL â
VDDPLL + IDDA â
VDDA
â PIO =
RDSON â
IIOi2
i
Which is the sum of all output currents on I/O ports associated with VDDX and VDDM.
For RDSON is valid:
RDSON
=
V-----O-----L--;for outputs driven low
IOL
respectively
RDSON
=
-V----D----D-----5-----â----V-----O-----H-- ;for outputs
IOH
driven
high
2. Internal voltage regulator enabled
PINT = IDDR â
VDDR + IDDA â
VDDA
IDDR is the current shown in Table A-8 and not the overall current flowing into VDDR, which
additionally contains the current flowing into the external loads with output high.
â PIO =
RDSON â
IIOi2
i
Which is the sum of all output currents on I/O ports associated with VDDX and VDDR.
Table A-5. Thermal Package Characteristics1
Num C
Rating
Symbol Min
1
T Thermal Resistance LQFP112, single sided PCB2
θJA
â
2
T Thermal Resistance LQFP112, double sided PCB
θJA
â
with 2 internal planes3
3
T Junction to Board LQFP112
4
T Junction to Case LQFP112
5
T Junction to Package Top LQFP112
6
T Thermal Resistance QFP 80, single sided PCB
7
T Thermal Resistance QFP 80, double sided PCB
with 2 internal planes
θJB
â
θJC
â
ΨJT
â
θJA
â
θJA
â
8
T Junction to Board QFP80
θJB
â
9
T Junction to Case QFP80
θJC
â
10
T Junction to Package Top QFP80
ΨJT
â
1 The values for thermal resistance are achieved by package simulations
2 PC Board according to EIA/JEDEC Standard 51-3
3 PC Board according to EIA/JEDEC Standard 51-7
Typ
Max Unit
â
54
°oC/W
â
41
oC/W
â
31
°oC/W
â
11
oC/W
â
2
oC/W
â
51
°oC/W
â
41
oC/W
â
27
°oC/W
â
14
oC/W
â
3
oC/W
MC9S12E256 Data Sheet, Rev. 1.08
Freescale Semiconductor
565
|
▷ |