HCS12 datasheet(87/126 Pages) NXP

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Device User Guide — 9S12KT256DGV1/D V01.09

Freescale Semiconductor

NOTE:

Instead of specifying ambient temperature all parameters are specified for the more

meaningful silicon junction temperature. For power dissipation calculations refer

to Section A.1.8 Power Dissipation and Thermal Characteristics.

A.1.8 Power Dissipation and Thermal Characteristics

Power dissipation and thermal characteristics are closely related. The user must assure that the maximum

operating junction temperature is not exceeded. The average chip-junction temperature (TJ) in °C can be

obtained from:

Table A-4 Operating Conditions

Rating

Symbol

Min

Typ

Max

Unit

I/O, Regulator and Analog Supply Voltage

VDD5

3.15

3.3/5

5.5

Internal Logic Supply Voltage1

NOTES:

1. The device contains an internal voltage regulator to generate the logic and PLL supply out of the I/O supply. The

absolute maximum ratings apply when this regulator is disabled and the device is powered from an external

source.

VDD

2.35

2.5

2.75

PLL Supply Voltage (1)

VDDPLL

2.35

2.5

2.75

Voltage Difference VDDX to VDDA

∆

VDDX

-0.1

0.1

Voltage Difference VSSX to VSSR and VSSA

∆

VSSX

-0.1

0.1

Oscillator

fosc

0.5

MHz

Bus Frequency

fbus

0.5

MHz

MC9S12K-FamilyC/MC9S12KT256C

Operating Junction Temperature Range

-40

100

°C

Operating Ambient Temperature Range 2

2. Please refer to Section A.1.8 Power Dissipation and Thermal Characteristics for more details about the rela-

tion between ambient temperature TA and device junction temperature TJ.

-40

°C

MC9S12K-FamilyV/MC9S12KT256V

Operating Junction Temperature Range

-40

120

°C

Operating Ambient Temperature Range (2)

-40

105

°C

MC9S12K-FamilyM/MC9S12KT256M

Operating Junction Temperature Range

-40

140

°C

Operating Ambient Temperature Range (2)

-40

125

°C

•

()

Junction Temperature, [

°C ]

Ambient Temperature, [

°C ]

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