MAC7200 datasheet(941/976 Pages) FREESCALE

941 / 976 page

Power Dissipation and Thermal Characteristics

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

863

A.4.2

Oscillator Pins

The pins EXTAL and XTAL are dedicated to the oscillator and operate from VDDPLL at a nominal level

of 3.3V.

A.4.3

PLL Pins

The pin XFC is dedicated to the PLL and operates at a nominal level of 3.3V.

A.5

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.

Note that the JEDEC specification reserves the symbol RθJA or θJA (Theta-JA) strictly for junction-to-

ambient thermal resistance on a 1s test board in natural convection environment. RθJMA or θJMA

(Theta-JMA) will be used for both junction-to-ambient on a 2s2p test board in natural convection and for

junction-to-ambient with forced convection on both 1s and 2s2p test boards. It is anticipated that the

generic name,

JA, will continue to be commonly used.

The average chip-junction temperature (TJ) in °C is obtained from:

Eqn. A-1

Internal Pull Up Device Current,

tested at V

Min.

IPUH

—

μA

Internal Pull Down Device Current,

tested at V

Min.

IPDH

——

150

μA

D10

Internal Pull Down Device Current,

tested at V

Max.

IPDL

—

μA

D11

Input Capacitance

Cin

—2

—

1. Refer to Section A.6, “Power Supply” for definition of VSS5 and VDD5.

2. Maximum leakage current occurs at maximum operating temperature. Current decreases by approximately one-half for

each 8°C to 12°C in the temperature range from 50°C to 125°C.

Table A-7. Oscillator Characteristics

Num C

Rating

Symbol

Min

Typ

Max

Unit

D Input Capacitance (EXTAL, XTAL pins)

CIN

——

D EXTAL Pin Input High Voltage1

1. In External Clock Model.

VIH,EXTAL

0.75 x VDDPLL

—

VDDPLL+ 0.4

D EXTAL Pin Input Low Voltage1

VIL,EXTAL

VDDPLL - 0.4

—

0.25 x VDDPLL

D EXTAL Pin Input Hysteresis1

VHYS,EXTAL

200

Table A-6. 5V I/O Characteristics (Continued)

Conditions shown in Table A-5 unless otherwise noted

⋅

MAC7200 Datasheet(PDF) 941 Page - Freescale Semiconductor, Inc

MAC7200 Datasheet(HTML) 941 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL