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參數(shù)資料
| 型號： | G771 |
| 廠商： | Global Mixed-mode Technology Inc. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Two Remote Temperature Sensors with SMBus Serial Interface and System Reset Circuit |
| 中文描述： | 兩個遠程溫度傳感器，帶有SMBus串行接口和系統(tǒng)復(fù)位電路 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大小： | 268K |
| 代理商： | G771 |
Ver 0.2 Preliminary
Dec 11, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G771
Global Mixed-mode Technology Inc.
Two Remote Temperature Sensors with SMBus
Serial Interface and System Reset Circuit
Features
Measures Two Remote Temperatures
No Calibration Required
SMBus 2-Wire Serial Interface
Programmable Under/Over-temperature Alarms
Programmable Thermal Shutdown Signal
Supports SMBus Alert Response
Accuracy: ±5°C (-40°C to + 125°C, remote)
±3°C (+60°C to + 100°C, remote)
4.5V to 5.5V Supply Range
Precision Monitoring of 5V Power-Supply
Voltage
140ms Min Power-On Reset Pulse Width
RESET Output
Guaranteed RESET Valid to VCC=1V
Power Supply Transient Immunity
No External Components needed for reset
function
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
Pin Configuration
General Description
The G771 contains a precise digital thermometer, a
system-reset circuit, and a programmable thermal
shutdown signal.
The thermometer reports the temperature of 2 remote
sensors. The remote sensors are diode-connected
transistors
typically
a
low-cost,
easily
mounted
2N3904 NPN type that replace conventional thermis-
tors or thermocouples. Remote accuracy is ±5°C for
multiple transistor manufacturers, with no calibration
needed. The remote channel can also measure the die
temperature of other ICs, such as microprocessors,
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 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.
Ordering Information
PART*
TEMP. RANGE
PIN-PACKAGE
G771
-55°C to +125°C
16SSOP
TH_SHUT(push-pull)
NC
SMBDATA
1
2
3
4
5
6
7
8
NC
Vcc
DXP1
DXN
DXP2
DGND
AGND
16
15
14
13
12
11
10
9
SMBCLK
NC
ALERT
NC
RESET
16Pin SSOP
NC
G771
TH_SHUT(push-pull)
NC
SMBDATA
1
2
3
4
5
6
7
8
NC
Vcc
DXP1
DXN
DXP2
DGND
AGND
16
15
14
13
12
11
10
9
SMBCLK
NC
ALERT
NC
RESET
16Pin SSOP
NC
G771
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