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Global Mixed-mode Technology Inc.

G766

Remote Temperature Sensor with SMBus Serial

Interface

Features

Single Channel: Measures Remote CPU Tem-

perature

No Calibration Required

SMBus 2-Wire Serial Interface

Programmable Under/Overtemperature Alarms

Supports SMBus Alert Response

Accuracy:

鹵3擄C (+60擄C to +100擄C, remote)

3碌A(chǔ) (typ) Standby Supply Current

300碌A(chǔ) (max) Supply Current in Auto- Convert

Mode

+3V to +5.5V Supply Range

Small, 10-Pin MSOP Package

General Description

The G766 is a precise digital thermometer that reports

the temperature of a remote sensor. The remote sen-

sor is a diode-connected transistor typically a low-cost,

easily mounted 2N3904 NPN type-that replace con-

ventional thermistors or thermocouples. Remote ac-

curacy is 鹵3擄C for multiple transistor manufacturers,

with no calibration needed. The G766 can also meas-

ure the die temperature of other ICs, such as micro-

processors, that contain an on-chip, diode-connected

transistor.

The 2-wire serial interface accepts standard System

Management Bus (SMBus

TM

) Write Byte, Read Byte,

Send Byte, and Receive Byte commands to program

the alarm thresholds and to read temperature data.

The data format is 7 bits plus sign, with each bit cor-

responding to 1擄C, in twos-complement format. Meas-

urements can be done automatically and autono-

mously, with the conversion rate programmed by the

user or programmed to operate in a single-shot mode.

The adjustable rate allows the user to control the sup-

ply-current drain.

The G766 is available in a small, 10-pin MSOP sur-

face-mount package.

Applications

Desktop and Notebook

Computers

Smart Battery Packs

LAN Servers

Industrial Controls

Central Office

Telecom Equipment

Test and Measurement

Multi-Chip Modules

Ordering Information

PART*

G766

TEMP. RANGE

-55擄C to +125擄C

PIN PACKAGE

10-MSOP

Pin Configuration

Typical Operating Circuit

G766

ADD0

ADD1

GND

DXN

DXP

1

2

3

4

5

10

9

8

7

6

ALERT

3V TO 5.5V

0.1 碌F

200

惟

Vcc

STBY

10k EACH

SMBDATA

DXP

SMBCLK

SMBDATA

CLOCK

DATA

INTERRUPT

TO 碌C

SMBCLK

STBY

2N3904

2200pF

ADD0 ADD1 GND

DXN

ALERT

Vcc

10 Pin MSOP

Ver 1.0

Dec 11, 2001

TEL: 886-3-5788833

http://www.gmt.com.tw

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• G766
  英文版
  Remote Temperature Sensor with SMBus Serial Interface
  ETC
  G766
• G766
  英文版
  Remote Temperature Sensor with SMBus Serial Interface
  ETC [ETC]
  G766

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