G768B View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

G768B

Remote/Local Temperature Sensor/ 2 Fan Controllers with SMBus Serial Interface and System Reset Circuit

Unspecified 

Global Mixed-mode Technology Inc.

G768B

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

Continuous Power Dissipation (TA= +70°C) SSOP

(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

(Vcc = + 5V, TA = 60°C, unless otherwise noted.)

PARAMETER

CONDITIONS

Temperature Sensor

Temperature Resolution(Note 1)

Monotonicity guaranteed

Temperature Error, Remote Diode (Notes 2 TR = 0°C to +125°C

and 3)

TR = 60°C to +100°C

Temperature Error, Local Diode

(Notes 1 and 2)

Including long-term drift

TA = +60°C to +100°C

Supply-Voltage Range

Under-voltage Lockout Threshold

Vcc input, disables A/D conversion, rising edge

Under-voltage Lockout Hysteresis

Power-On Reset Threshold

Vcc , falling edge

POR Threshold Hysteresis

Standby Supply Current

Logic inputs forced to Vcc or

GND

SMBus static

Hardware or software

standby, SMBCLK at 10kHz

Average Operating Supply Current

Auto-convert mode, average 0.25 conv/sec

measured over 4sec. Logic

inputs forced to Vcc or GND

2.0 conv/sec

Conversion Time

From stop bit to conversion complete(all channels)

Conversion Rate Timing Error

Auto-convert mode

Remote-Diode Source Current

DXP forced to 1.5V

High level

Low level

Fan Controller

Supply voltage

VCC

Shutdown current

Both fans’ speed = 0rpm

MOSFET on resistance

Each channel

Short-circuit current limit

Each channel

Input logic low

VIL

Input logic high

VIH

Average Output current

Each channel

FG input Positive-going threshold voltage

VCC=5V

FG input Negative-going threshold voltage

VCC=5V

FG input Hysteresis voltage

VCC=5V

MIN TYP MAX UNITS

8

Bits

-5

5

°C

-3

3

-3.5

3.5 °C

4.5 5 5.5 V

2.6 2.8 2.95 V

50

mV

1.0 1.7 2.5 V

50

mV

3 10

200

µA

250 300

µA

300 350

94 125 156 ms

-25

25 %

120 160 200 µA

15 20 25

4.5 5 5.5 V

2 5 µA

0.2 0.25 Ω

0.5

A

0.8 V

2.4

V

350 mA

1.8

V

0.7

V

1.1

V

Ver 1.3

Oct 28, 2002

TEL: 886-3-5788833

http://www.gmt.com.tw

3

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