MC908QT4MPE datasheet(150/184 Pages) FREESCALE

150 / 184 page

Electrical Specifications

MC68HC908QY/QT Family Data Sheet, Rev. 5

150

Freescale Semiconductor

16.3 Functional Operating Range

16.4 Thermal Characteristics

Characteristic

Symbol

Value

Unit

Temp.

Code

Operating temperature range

– 40 to +125

– 40 to +105

– 40 to +85

°C

Operating voltage range

VDD

2.7 to 5.5

—

Characteristic

Symbol

Value

Unit

Thermal resistance

8-pin PDIP

8-pin SOIC

8-pin DFN

16-pin PDIP

16-pin SOIC

16-pin TSSOP

θJA

105

142

173

133

°C/W

I/O pin power dissipation

PI/O

User determined

Power dissipation(1)

1. Power dissipation is a function of temperature.

PD = (IDD x VDD)

+ PI/O = K/(TJ + 273°C)

Constant(2)

2. K constant unique to the device. K can be determined for a known TA and measured PD. With this value of K, PD and TJ

can be determined for any value of TA.

PD x (TA + 273°C)

+ PD

2 x θJA

W/°C

Average junction temperature

TA + (PD x θJA)

°C

Maximum junction temperature

TJM

150

°C

MC908QT4MPE Datasheet(PDF) 150 Page - Freescale Semiconductor, Inc

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