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NCT72

更新时间： 2024-09-19 01:10:43
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
20页 255K
描述
Temperature Monitor with Series Resistance Cancellation

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NCT72 数据手册

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NCT72  
+15C Temperature Monitor  
with Series Resistance  
Cancellation  
The NCT72 is a dual-channel digital thermometer and  
undertemperature/overtemperature alarm, intended for use in PCs and  
thermal management systems. It is pin and register compatible with the  
NCT1008 but the NCT72 allows the user to pull the ALERT pin to  
1.8 V without increasing the device Idd. A feature of the NCT72 is  
series resistance cancellation, where up to 1.5 kW (typical) of resistance  
in series with the temperature monitoring diode can be automatically  
cancelled from the temperature result, allowing noise filtering. The  
NCT72 has a configurable ALERT output and an extended, switchable  
temperature measurement range.  
www.onsemi.com  
WDFN8  
DFN8  
CASE 511AT  
CASE 506BJ  
PIN ASSIGNMENT  
The NCT72 can measure the temperature of a remote thermal diode  
accurate to 1°C and the ambient temperature accurate to 3°C. The  
temperature measurement range defaults to 0°C to +127°C, compatible  
with the NCT1008, but it can be switched to a wider measurement range  
of −64°C to +191°C.  
1
8
7
6
5
V
SCLK  
DD  
2
3
4
D+  
D−  
SDATA  
ALERT/  
THERM2  
The NCT72 communicates over a 2-wire serial interface, compatible  
2
THERM  
GND  
with system management bus (SMBus/I C) standards. The default  
2
SMBus/I C address of the NCT72 is 0x4C. An NCT72D is available  
(Top View)  
2
with an SMBus/I C address of 0x4D. This is useful if more than one  
2
NCT72 is used on the same SMBus/I C.  
MARKING DIAGRAMS  
An ALERT output signals when the on-chip or remote temperature is  
out of range. The THERM output is a comparator output that allows  
on/off control of a cooling fan. The ALERT output can be reconfigured  
as a second THERM output, if required.  
1
7xMG  
G
Features  
WDFN8  
• On-chip and Remote Temperature Sensor  
• 0.25°C Resolution/1°C Accuracy on Remote Channel  
• 1°C Resolution/1°C Accuracy on Local Channel  
• Series Resistance Cancellation Up to 1.5 kW  
7x = Device Code (Where x = C or D)  
M
= Date Code  
G
= Pb-Free Package  
(Note: Microdot may be in either location)  
• Extended, Switchable Temperature Measurement Range  
0°C to +127°C (Default) or –64°C to +191°C  
• Pin and Register Compatible with NCT1008  
• Remote THERM Limit of 108°C  
1
8
NCT  
72x  
ALYWG  
2
• 2-wire SMBus/I C Serial Interface with SMBus Alert Support  
G
• Programmable Over/Undertemperature Limits  
• Offset Registers for System Calibration  
• Up to Two Overtemperature Fail-safe THERM Outputs  
• Small 8-lead DFN  
DFN8  
x
= C or D  
A
L
= Assembly Location  
= Wafer Lot  
Y
W
G
= Year  
= Work Week  
= Pb-Free Package  
• 240 mA Operating Current, 5 mA Standby Current  
• Compatible with 1.8 V Logic  
• These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS  
(Note: Microdot may be in either location)  
Compliant  
Applications  
ORDERING INFORMATION  
• Smart Phones  
See detailed ordering and shipping information in the package  
dimensions section on page 18 of this data sheet.  
• Desktop and Notebook Computers  
• Smart Batteries  
© Semiconductor Components Industries, LLC, 2012  
1
Publication Order Number:  
June, 2017 − Rev. 5  
NCT72/D  
1234567...20

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