Ver: 2.7

Dec 23, 2005

TEL: 886-3-5788833

http://www.gmt.com.tw

1

G751

Global Mixed-mode Technology Inc.

Digital Temperature Sensor and Thermal Watchdog

with Two-Wire Interface

Features

SMBus interface

Separate open-drain output pin operates as

interrupt or comparator at output

Register readback capability

Power up defaults permit stand-alone opera-

tion as thermostat

Shutdown mode to minimize power con-

sumption

Up to 8 G751s can be connected to a single

bus

Key Specifications

Supply Voltage

3.0V to 5.5V

Supply Current

operating

280µA (typ)

1mA (max)

shutdown

2µA(typ)

Temperature Accuracy

-25°C to 100°C

±2°C (max)

-55°C to 125°C

±3°C (max)

Applications

System Thermal Management

Personal Computers

Office Electronics

Electronic Test Equipment

Pin Configuration

General Description

The G751 is a temperature sensor, Delta-Sigma

analog-to-digital converter, and digital over- tem-

perature detector with SMBus interface. The host

can query the G751 at any time to read temperature.

The open-drain Over temperature Shutdown (O.S.)

output becomes active when the temperature ex-

ceeds a programmable limit. This pin can operate in

either “Comparator” or “Interrupt” mode.

The host can program both the temperature alarm

for G751-2.

Ordering Information

ORDER

NUMBER

ORDER

NUMBER

(Pb free)

PACKAGE

G751-1P1

G751-1P1f

50°C/45°C

SOP-8

G751-2P1

G751-2P1f

80°C/75°C

SOP-8

G751-2P8

G751-2P8f

80°C/75°C

MSOP-8

G751-2RD

G751-2RDf

80°C/75°C

TDFN3X3-8

P1: SOP-8; P8: MSOP-8; RD: TDFN3X3-8

Typical Application

SMBDATA

SOP-8/MSOP-8

G751

+Vs

A0

A1

A2

SMBCLK

O.S.

GND

G751

+V

Typical Bypass 0.1µF

(Unless mounted close

to Processor)

To Processor

Interrupt Line

O.S. Set for active low for

wire OR’d multiple

interrupt line

Address(Set as

desired)

Interface

8

3

O.S. Out

4

7

6

5

1

2

A0

A1

A2

SMBDATA

SMBCLK

TDFN3X3-8

1

2

3

4

8

7

6

5

Thermal

Pad

G751

1

2

3

4

8

7

6

5

SMBDATA

SMBCLK

O.S.

GND

+Vs

A0

A1

A2

Note: Recommend connecting the Thermal Pad to the GND or let it keep floating.

SMBDATA

SOP-8/MSOP-8

G751

+Vs

A0

A1

A2

SMBCLK

O.S.

GND

G751

+V

Typical Bypass 0.1µF

(Unless mounted close

to Processor)

To Processor

Interrupt Line

O.S. Set for active low for

wire OR’d multiple

interrupt line

Address(Set as

desired)

Interface

8

3

O.S. Out

4

7

6

5

1

2

A0

A1

A2

SMBDATA

SMBCLK

TDFN3X3-8

1

2

3

4

8

7

6

5

Thermal

Pad

G751

1

2

3

4

8

7

6

5

SMBDATA

SMBCLK

O.S.

GND

+Vs

A0

A1

A2

Note: Recommend connecting the Thermal Pad to the GND or let it keep floating.