Ver 1.3

Oct 28, 2002

TEL: 886-3-5788833

http://www.gmt.com.tw

3

G768B

Global Mixed-mode Technology Inc.

Absolute Maximum Ratings

Vcc to GND……………….………….…….-0.3V to +6V

DXP1, DXP2 to GND……………0.3V to (Vcc + 0.3V)

DXN to GND…………………………...-0.3V to +0.8V

SMBCLK, SMBDATA,

ALERT to GND.-0.3V to +6V

SMBDATA,

ALERT Current…………-1mA to +50mA

DXN Current……………………………..…………±1mA

ESD Protection (SMBCLK, SMBDATA,

ALERT , hu-

man body model)….…………………………….4000V

ESD Protection (other pins, human body

model).2000V

(de-rate 8.30mW/°C above +70°C)…….………667mW

Operating Temperature Range………-10°C to +85°C

Junction Temperature…………………....+150°C

Storage temperature Range…………..-65°C to +165°C

Lead Temperature (soldering,10sec)………….+300°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 opera-

tional sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may

affect device reliability.

Electrical Characteristics

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Temperature Sensor

Temperature Resolution(Note 1)

Monotonicity guaranteed

8

Bits

-5

5

Temperature Error, Remote Diode (Notes 2

and 3)

-3

3

°C

Temperature Error, Local Diode

(Notes 1 and 2)

Including long-term drift

-3.5

3.5

°C

Supply-Voltage Range

4.5

5

5.5

V

Under-voltage Lockout Threshold

Vcc input, disables A/D conversion, rising edge

2.6

2.8

2.95

V

Under-voltage Lockout Hysteresis

50

mV

Power-On Reset Threshold

Vcc , falling edge

1.0

1.7

2.5

V

POR Threshold Hysteresis

50

mV

SMBus static

3

10

Standby Supply Current

Logic inputs forced to Vcc or

GND

Hardware or software

standby, SMBCLK at 10kHz

200

µA

0.25 conv/sec

250

300

Average Operating Supply Current

Auto-convert mode, average

measured over 4sec. Logic

inputs forced to Vcc or GND

2.0 conv/sec

300

350

µA

Conversion Time

From stop bit to conversion complete(all channels)

94

125

156

ms

Conversion Rate Timing Error

Auto-convert mode

-25

25

%

High level

120

160

200

Remote-Diode Source Current

DXP forced to 1.5V

Low level

15

20

25

µA

Fan Controller

Supply voltage

4.5

5

5.5

V

Shutdown current

Both fans’ speed = 0rpm

2

5

µA

MOSFET on resistance

Each channel

0.2

0.25

Ω

Short-circuit current limit

Each channel

0.5

A

Input logic low

VIL

0.8

V

Input logic high

VIH

2.4

V

Average Output current

Each channel

350

mA

FG input Positive-going threshold voltage

1.8

V

FG input Negative-going threshold voltage

0.7

V

FG input Hysteresis voltage

1.1

V