MAX6678ATP90 datasheet(2/19 Pages) MAXIM

Part #	MAX6678ATP90

Description	2-Channel Temperature Monitor with Dual Automatic PWM Fan-Speed Controller and Five GPIOs

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Manufacturer	MAXIM [Maxim Integrated Products]

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2-Channel Temperature Monitor with Dual Automatic

PWM Fan-Speed Controller and Five GPIOs

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = +3.0V to +5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VCC to GND ..............................................................-0.3V to +6V

OT, SMBDATA, SMBCLK, PWMOUT_,

GPIO_ to GND ......................................................-0.3V to +6V

DXP_ to GND ..........................................-0.3V to + (VCC + 0.3V)

DXN to GND ..........................................................-0.3V to +0.8V

PRESET_ to GND ....................................-0.3V to + (VCC + 0.3V)

SMBDATA,

OT, PWMOUT_ Current....................-1mA to +50mA

DXN Current .......................................................................±1mA

ESD Protection (all pins, Human Body Model) ..................2000V

Continuous Power Dissipation (TA = +70°C)

20-Pin QSOP (derate 9.1mW/°C above +70°C).......... 727mW

20-Pin TQFN (derate 34.5mW/°C above +70°C) .......2759mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature ......................................................+150°C

Storage Temperature Range ............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Supply Voltage Range

VCC

+3.0

+5.5

V

Operating Current

IS

Interface inactive, ADC active

0.5

1

mA

+25°C

≤ TR ≤ +125°C,

TA = 60°C

±1

VCC = 3.3V

0°C

≤ TR ≤ +145°C,

+25°C

≤ TA ≤ +100°C

±3

External Temperature Error,

VCC = 3.3V

0°C

≤ TR ≤ +145°C,

0°C

≤ TA ≤ +125°C

±4

°C

+25°C

≤ TR ≤ +100°C

±2.5

Internal Temperature Error

VCC = +3.3V

0°C

≤ TA ≤ +125°C

±4

°C

1°C

Temperature Resolution

8

Bits

Conversion Time

200

250

300

ms

PWM Frequency Tolerance

(Note 1)

-20

+20

%

High level

80

100

120

Remote-Diode Sourcing Current

Low level

8

10

12

µA

DXN Source Voltage

0.7

V

DIGITAL INPUTS AND OUTPUTS

Output Low Voltage (Sink Current)

(

OT, GPIO_, SMBDATA, PWMOUT_)

VOL

IOUT = 6mA

0.4

V

Output High Leakage Current

(

OT, GPIO_, SMBDATA, PWMOUT_)

IOH

1µA

VCC = 3V to 3.6V

0.8

Logic-Low Input Voltage (SMBDATA,

SMBCLK, PRESET_, GPIO_)

VIL

VCC = 3.6V to 5.5V

0.8

V

VCC = 3V to 3.6V

2.1

Logic-High Input Voltage (SMBDATA,

SMBCLK, PRESET_, GPIO_)

VIH

VCC = 3.6V to 5.5V

2.1

V

Input Leakage Current

1µA

Input Capacitance

CIN

5pF

SMBus TIMING

Serial Clock Frequency

fSCLK

100

kHz

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