S12SCIV2SLASHD datasheet(93/130 Pages) FREESCALE

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MC9S12H256 Device User Guide — V01.18

A.1.7 Operating Conditions

This chapter describes the operating conditions of the device. Unless otherwise noted those conditions

apply to all the following data.

NOTE:

Please refer to the temperature rating of the device (C, V, M) with regards to the

ambient temperature TA and the junction temperature TJ. 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

4.5

5.25

Digital Logic Supply Voltage 1

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 2

VDDPLL

2.35

2.5

2.75

Voltage Difference VDDX to VDDR and 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

MC9S12H256C, MC9S12H128C

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

MC9S12H256V, MC9S12H128V

Operating Junction Temperature Range

–40

–

120

°C

Operating Ambient Temperature Range 2

–40

105

°C

MC9S12H256M, MC9S12H128M

Operating Junction Temperature Range

–40

–

140

°C

Operating Ambient Temperature Range 2

–40

125

°C

Freescale Semiconductor, Inc.

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