G751_05 Datasheet, PDF (1/12 Pages) Global Mixed-mode Technology Inc – Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface

Global Mixed-mode Technology Inc.
G751
Digital Temperature Sensor and Thermal Watchdog
with Two-Wire Interface
Features
„ SMBus interface
„ Programmable Trip Point (T_OS) and Hysteresis
(T_HYST)
„ 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
„ Supply Current operating
shutdown
„ Temperature Accuracy
-25°C to 100°C
-55°C to 125°C
3.0V to 5.5V
280µA (typ)
1mA (max)
2µA(typ)
±2°C (max)
±3°C (max)
Applications
„ System Thermal Management
„ Personal Computers
„ Office Electronics
„ Electronic Test Equipment
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
threshold (T_OS) and the temperature at which the
alarm condition goes away (T_HYST). In addition, the
host can read back the contents of the G751's T_OS
and T_HYST registers. The sensor powers up in Com-
parator mode with default thresholds of 50°C T_OS
45°C T_HYST. for G751-1 and 80°C T_OS , 75°C T_HYST
for G751-2.
Ordering Information
ORDER
NUMBER
ORDER
NUMBER
(Pb free)
T_OS T_HYST
G751-1P1 G751-1P1f 50°C/45°C
G751-2P1 G751-2P1f 80°C/75°C
G751-2P8 G751-2P8f 80°C/75°C
G751-2RD G751-2RDf 80°C/75°C
P1: SOP-8; P8: MSOP-8; RD: TDFN3X3-8
PACKAGE
SOP-8
SOP-8
MSOP-8
TDFN3X3-8
Pin Configuration
Typical Application
G751
G751
SMBDATA 1
SMBCLK 2
O.S. 3
GND 4
8 +Vs SMBDATA 1
7 A0
6 A1
SMBCLK 2
O.S. 3
5 A2
GND 4
Thermal
Pad
8 +Vs
7 A0
6 A1
5 A2
SOP-8/MSOP-8
TDFN3X3-8
Note: Recommend connecting the Thermal Pad to the GND or let it keep floating.
Address(Set as
desired)
7
A0 ₆
A1 ₅
A2
1
SMBDATA
Interface
2
SMBCLK
+V_S 3V to 5.5V
8
Typical Bypass 0.1µF
(Unless mounted close
to Processor)
G751
3
To Processor
O.S. Out Interrupt Line
4
O.S. Set for active low for
wire OR’d multiple
interrupt line
Ver: 2.7
Dec 23, 2005
TEL: [phone]
http://www.gmt.com.tw
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