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G766 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. G766
Description  Remote Temperature Sensor with SMBus Serial Interface
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Maker  ETC1 [List of Unclassifed Manufacturers]
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G766 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

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Ver 1.0
Dec 11, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
1
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:
±3°C (+60°C to +100°C, remote)
3µA (typ) Standby Supply Current
300µA (max) Supply Current in Auto- Convert
Mode
+3V to +5.5V Supply Range
Small, 10-Pin MSOP Package
Applications
Desktop and Notebook
Central Office
Computers
Telecom Equipment
Smart Battery Packs
Test and Measurement
LAN Servers
Multi-Chip Modules
Industrial Controls
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 ±3°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°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.
Ordering Information
PART*
TEMP. RANGE
PIN PACKAGE
G766
-55°C to +125°C
10-MSOP
Pin Configuration
Typical Operating Circuit
SMBDATA
1
2
3
4
5
ADD0
ADD1
DXN
DXP
GND
10
9
8
7
6
SMBCLK
STBY
ALERT
10 Pin MSOP
Vcc
G766
SMBDATA
1
2
3
4
5
ADD0
ADD1
DXN
DXP
GND
10
9
8
7
6
SMBCLK
STBY
ALERT
10 Pin MSOP
Vcc
G766
0.1 µF
200Ω
3V TO 5.5V
Vcc
STBY
DXP
DXN
SMBCLK
SMBDATA
ALERT
10k EACH
CLOCK
DATA
INTERRUPT
TO µC
ADD0 ADD1 GND
2200pF
2N3904
0.1 µF
200Ω
3V TO 5.5V
Vcc
STBY
DXP
DXN
SMBCLK
SMBDATA
ALERT
10k EACH
CLOCK
DATA
INTERRUPT
TO µC
ADD0 ADD1 GND
2200pF
2N3904


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