MEC1322 datasheet(395/456 Pages) MICROCHIP

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DS00001719D-page 395

MEC1322

37.3

Thermal Characteristics

37.4

Power Consumption

TABLE 37-8:

THERMAL OPERATING CONDITIONS

Rating

Symbol

Min.

Typical

Max.

Unit

Consumer Temperature Devices

Operating Junction Temperature Range

—

+125

°C

Operating Ambient Temperature Range - Commercial

0—

+70

°C

Operating Ambient Temperature Range - Industrial

-40

—

+85

°C

Power Dissipation:

Internal Chip Power Dissipation:

PINT = VCC1 x IVCC1 from Table 37-10

(e.g., 3.45V x 9.75mA = 33.64mW)

I/O Pin Power Dissipation:

I/O = S (({VCC1 – VOH} x IOH) + S (VOL x IOL))

PINT + PI/O

Maximum Allowed Power Dissipation

PDMAX

(TJ – TA)/

θJA

TABLE 37-9:

THERMAL PACKAGING CHARACTERISTICS

Characteristics

Symbol Typical

Max.

Unit

Notes

Package Thermal Resistance, 128-pin VTQFP

θJA

51.0

—

°C/W

θJC

25.0

—

°C/W

Package Thermal Resistance, 132-pin DQFN

θJA

28.0

—

°C/W

θJC

5.0

—

°C/W

Package Thermal Resistance, 144-pin WFBGA

θJA

50.0

—

°C/W

θJC

17.0

—

°C/W

Note 1:

Junction to ambient thermal resistance, Theta-JA (

θJA) and Junction to case thermal resistance, Theta-JC

(

θJC) numbers are achieved by package simulations.

TABLE 37-10: VCC1 SUPPLY CURRENT, I_VCC1

VCC2 VCC1

System

State

48 MHz

Ring

Oscillator

Frequency

Typical

(3.3V,

250 C)

Max

(3.465V,

700 C)

Max

(3.465V,

850 C)

Units

Comments

48MHz

8.50

9.75

10.25

FULL ON, 48MHz, LPC Clock ON

12MHz

6.00

8.00

8.50

FULL ON, 12MHz, LPC Clock ON

3MHz

5.50

7.00

7.50

FULL ON, 3MHz, LPC Clock ON

1MHz

5.00

6.50

7.00

FULL ON, 1MHz, LPC Clock ON

12MHz

3.00

3.70

4.25

Heavy Sleep 1, LPC Clock ON

Off

0.80

1.50

2.10

Heavy Sleep 2, LPC Clock ON

Off

0.50

1.25

1.85

Heavy Sleep 3, LPC Clock ON

Off

48MHz

7.75

9.25

9.75

FULL ON (48MHz), LPC Clock Off

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