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PDF NCT7717U Data sheet ( Hoja de datos )
| Número de pieza | NCT7717U | |
| Descripción | Thermal Sensor IC | |
| Fabricantes | nuvoton | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NCT7717U (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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NCT7717U
Nuvoton
Thermal Sensor IC
Date: Jan./11/2011 Revision: 1.11
1 page  
NCT7717U
1. GENERAL DESCRIPTION
NCT7717U is an one on-chip local thermal sensor with high accuracy, a 8-bit ADC (Analog-to-Digital
Converter) is built inside NCT7717U to convert the monitored temperature value with 1C resolution.
The NCT7717U supports an independent over temperature protection signal to activate system
protection and hardware thermal shutdown via the ALERT# pin.
The NCT7717U is a high precision, low-power consumption IC supporting SMBus TM interface, which
is specifically designed for the PC, Notebook applications, and any embedded environments. Its
available package is 5-pin SOT23, with the working voltage of 3.3V.
2. FEATURES
2.1 Monitoring Items - Temperature
One on-chip thermal sensor
Measure temperature with high accuracy
Two’s complement data format, 1C resolution
2.2 General
Alert point supports Hardware Power-on Setting
I2C® Compatible System Management bus (SMBusTM)
3.3V±5% VDD operation
2.3 Package
SOT-23-5 Lead Free (ROHS Compliant) and Halogen Free Package
3. KEY SPECIFICATIONS
PARAMETER
RATING
-40C to +125C (TA)
Local temperature range and accuracy
Supply voltage
Typ. 2C (20C~40C)
Max. 3C (-40C~125C) *1
3.3V ± 5%
Operating supply current
700 uA typ.
ADC resolution include sign bit
8 Bits
*1 Guaranteed by design from -40~125 degreeC.
Release Date: Jan, 2011
- 1 - Version: 1.11
5 Page 
NCT7717U
7.2 Register Detail
7.2.1 Register：Local Diode Temperature Readout
Location : Address 00h
Type : Read Only
Power on default value : 00
BIT 7 6 5 4 3 2 1 0
NAME
Local Diode Temperature Readout Value. The real temperature value calculation is
referred to TEMPERATURE MEASUREMENT DATA FORMAT.
VALUE SIGN
64
32
16
8
4
2
1
7.2.2 Register：Alert Status
Location : Address 02h
Type : Read Only
Power on default value : 00
BIT 7
6 543210
NAME ADC_Busy STS_LTHA
Reserved
DEFAULT
0
0
BIT FLAG NAME
DESCRIPTION
7 ADC_Busy If set to ‘1’ indicates ADC is busy converting.
6
STS_LTHA
If set to ‘1’ indicates a measured Local Diode Temperature Higher than
Local High set point (High Limit).
7.2.3 Register：Configuration
Location : Read = Address 03h Write = Address 09h
Type : Read/Write
Power on default value : 21
BIT 7
6 5432
NAME ALERT_MSK STOP_Mnt
Reserved
DEFAULT
0
0
10
EN_FaultQueue
1
BIT DESCRIPTION
7 ALERT_MSK – ALERT# function is enable
Release Date: Jan, 2011
- 7 - Version: 1.11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet NCT7717U.PDF ] | |
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