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G751_05 Datasheet

  • G751_05

  • Digital Temperature Sensor and Thermal Watchdog with Two-Wir...

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Global Mixed-mode Technology Inc.
G751
Digital Temperature Sensor and Thermal Watchdog
with Two-Wire Interface
General Description
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
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
鈥淐omparator鈥?/div>
or
鈥淚nterrupt鈥?/div>
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擄C T
OS
45擄C T
HYST.
for G751-1 and 80擄C T
OS
, 75擄C T
HYST
for G751-2.
Key Specifications
Supply Voltage
Supply Current
operating
3.0V to 5.5V
280碌A(chǔ) (typ)
1mA (max)
2碌A(chǔ)(typ)
鹵2擄C
(max)
鹵3擄C
(max)
shutdown
Temperature Accuracy
-25擄C to 100擄C
-55擄C to 125擄C
Ordering Information
ORDER
NUMBER
G751-1P1
G751-2P1
G751-2P8
G751-2RD
ORDER
NUMBER
(Pb free)
G751-1P1f
G751-2P1f
G751-2P8f
G751-2RDf
T
OS
T
HYST
50擄C/45擄C
80擄C/75擄C
80擄C/75擄C
80擄C/75擄C
PACKAGE
SOP-8
SOP-8
MSOP-8
TDFN3X3-8
Applications
System Thermal Management
Personal Computers
Office Electronics
Electronic Test Equipment
P1: SOP-8; P8: MSOP-8; RD: TDFN3X3-8
Pin Configuration
Typical Application
+V
S
3V to 5.5V
Typical Bypass 0.1碌F
(Unless mounted close
to Processor)
G751
SMBDATA
SMBCLK
O.S.
GND
1
2
3
4
8
7
6
5
+Vs SMBDATA
A0
A1
A2
SMBCLK
O.S.
GND
1
2
3
4
G751
7
8
Thermal
Pad
7
6
5
+Vs
A0
A1
A2
Address(Set as
desired)
A0
A1
A2
1
SMBDATA
Interface
2
SMBCLK
6
5
8
G751
3
O.S. Out
To Processor
Interrupt Line
SOP-8/MSOP-8
TDFN3X3-8
4
O.S. Set for active low for
wire OR鈥檇 multiple
interrupt line
Note: Recommend connecting the Thermal Pad to the GND or let it keep floating.
Ver: 2.7
Dec 23, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1

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