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G767 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc

Part No. G767
Description  Remote/Local Temperature Sensor with SMBus Serial Interface
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Maker  GMT [Global Mixed-mode Technology Inc]
Homepage  http://www.gmt.com.tw
Logo GMT - Global Mixed-mode Technology Inc

G767 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc

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Ver: 2.5
Dec 14, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G767
Global Mixed-mode Technology Inc.
Remote/Local Temperature Sensor with SMBus
Serial Interface
Features
Two Channels: Measures Both Remote and
Local Temperatures
No Calibration Required
SMBus 2-Wire Serial Interface
Programmable Under/Overtemperature Alarms
Supports SMBus Alert Response
Accuracy:
±2°C (+60°C to + 100°C, local)
±3°C (-40°C to +125°C, local)
±3°C (+60°C to +100°C, remote)
3µA (typ) Standby Supply Current
70µA (max) Supply Current in Auto- Convert
Mode
+3V to +5.5V Supply Range
Small, 16-Pin SSOP 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 G767 is a precise digital thermometer that reports
the temperature of both a remote sensor and its own
package. The remote sensor is a diode-connected
transistor typically a low-cost, easily mounted 2N3904
NPN type-that replace conventional thermistors or
thermocouples. Remote accuracy is ±3°C for multiple
transistor manufacturers, with no calibration needed.
The remote channel can also measure the die tem-
perature of other ICs, such as microprocessors, that
contain an on-chip, diode-connected transistor.
The 2-wire serial interface accepts standard System
Management Bus (SMBusTM) 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 two’s-complement format.
Measurements can be done automatically and
autonomously, 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 supply-current drain.
The G767 is available in a small, 16-pin SSOP sur-
face-mount package.
Ordering Information
ORDER
NUMBER
ORDER NUMBER
(Pb free)
TEMP.
RANGE
PACKAGE
G767
G767f
-55°C to +125°C
SSOP-16
Pin Configuration
Typical Operating Circuit
0.1µF
200Ω
3V TO 5.5V
Vcc
STBY
DXP
DXN
SMBCLK
SMBDATA
ALERT
10k EACH
CLOCK
DATA
INTERRUPT
TO µC
ADD0 ADD1 GND
2200pF
2N3904
SMBDATA
1
2
3
4
5
6
7
8
N.C.
Vcc
DXP
DXN
N.C.
ADD1
GND
GND
16
15
14
13
12
11
10
9
N.C
STBY
SMBCLK
N.C.
ALERT
ADD0
N.C.
SSOP-16
G767
0.1µF
200Ω
3V TO 5.5V
Vcc
STBY
DXP
DXN
SMBCLK
SMBDATA
ALERT
10k EACH
CLOCK
DATA
INTERRUPT
TO µC
ADD0 ADD1 GND
2200pF
2N3904
0.1µF
200Ω
3V TO 5.5V
Vcc
STBY
DXP
DXN
SMBCLK
SMBDATA
ALERT
10k EACH
CLOCK
DATA
INTERRUPT
TO µC
ADD0 ADD1 GND
2200pF
2N3904
SMBDATA
1
2
3
4
5
6
7
8
N.C.
Vcc
DXP
DXN
N.C.
ADD1
GND
GND
16
15
14
13
12
11
10
9
N.C
STBY
SMBCLK
N.C.
ALERT
ADD0
N.C.
SSOP-16
G767


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