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MAX6642_0910

更新时间： 2024-09-15 11:15:19
品牌 Logo 应用领域
美信 - MAXIM 传感器温度传感器
页数 文件大小 规格书
14页 151K
描述
±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm

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MAX6642_0910 数据手册

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19-2920; Rev 3; 10/09  
±±1°C ꢀMꢁusꢂ°oꢃpatiꢄle ꢅeꢃoteꢆ/ocal  
Teꢃperature ꢀensor with Overteꢃperature Alarꢃ  
MAX642  
General Description  
Features  
The MAX6642 precise, two-channel digital temperature  
sensor accurately measures the temperature of its own  
die and a remote PN junction and reports the tempera-  
ture data over a 2-wire serial interface. The remote PN  
junction is typically a substrate PNP transistor on the  
die of a CPU, ASIC, GPU, or FPGA. The remote PN  
junction can also be a discrete diode-connected small-  
signal transistor.  
o Dual Channel: Measures Remote and Local  
Temperature  
o +0.25°C Resolution  
o High Accuracy 1°C (max) (Remote) and  
2°C (Local) from +60°C to +100°C  
o Measures Remote Temperature Up to +150°C  
o Programmable Overtemperature Alarm  
The 2-wire serial interface accepts standard system  
management bus (SMBus™), Write Byte, Read Byte,  
Send Byte, and Receive Byte commands to read the  
temperature data and to program the alarm thresholds.  
To enhance system reliability, the MAX6642 includes an  
SMBus timeout. The temperature data format is 10 bit  
with the least significant bit (LSB) corresponding to  
+0.25°C. The ALERT output asserts when the local or  
remote overtemperature thresholds are violated. A fault  
queue may be used to prevent the ALERT output from  
setting until two consecutive faults have been detected.  
Temperature Thresholds  
o SMBus/I2C-Compatible Interface  
o Tiny TDFN Package with Exposed Pad  
Ordering Inforꢃation  
PART  
TEMP RANGE  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
6 TDFN-EP*  
6 TDFN-EP*  
6 TDFN-EP*  
6 TDFN-EP*  
6 TDFN-EP*  
6 TDFN-EP*  
6 TDFN-EP*  
6 TDFN-EP*  
MAX6642ATT90-T  
MAX6642ATT92-T  
MAX6642ATT94-T  
MAX6642ATT96-T  
MAX6642ATT98-T  
MAX6642ATT9A-T  
MAX6642ATT9C-T  
MAX6642ATT9E-T  
Measurements can be done autonomously or in a sin-  
gle-shot mode.  
Remote accuracy is 1°C maꢀimum error between  
+60°C and +100°C. The MAX6642 operates from -40°C  
to +125°C, and measures remote temperatures  
between 0°C and +150°C. The MAX6642 is available in  
a 6-pin TDFN package with an eꢀposed pad.  
T = Tape and reel.  
*EP = Eꢀposed pad.  
Applications  
Desktop Computers  
Notebook Computers  
Servers  
Pin Configuration and Functional Diagram appear at end of  
data sheet.  
Typical Operating °ircuit  
Thin Clients  
Test and Measurement  
Workstations  
3.3V  
0.1μF  
47Ω  
Graphic Cards  
ꢀelector Guide  
10kΩ EACH  
V
CC  
TOP  
MARK  
PART  
MEASURED TEMP RANGE  
2200pF  
MAX6642  
SDA  
DATA  
DXP  
MAX6642ATT90-T  
MAX6642ATT92-T  
MAX6642ATT94-T  
MAX6642ATT96-T  
MAX6642ATT98-T  
MAX6642ATT9A-T  
MAX6642ATT9C-T  
MAX6642ATT9E-T  
0°C to +150°C  
0°C to +150°C  
0°C to +150°C  
0°C to +150°C  
0°C to +150°C  
0°C to +150°C  
0°C to +150°C  
0°C to +150°C  
AFC  
AFD  
AFE  
AFF  
AEW  
AFG  
AFH  
AFI  
SCLK  
CLOCK  
ALERT  
INTERRUPT TO μP  
GND  
μP  
SMBus is a trademark of Intel Corp.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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