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MAX6641AUB94

更新时间： 2024-09-16 02:51:03
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美信 - MAXIM /
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17页 474K
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SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller

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MAX6641AUB94 数据手册

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19-3304; Rev 1; 4/06  
SMBus-Compatible Temperature Monitor with  
Automatic PWM Fan-Speed Controller  
General Description  
Features  
The MAX6641 temperature sensor and fan controller  
accurately measures the temperature of its own die and  
the temperature of a remote pn junction. The device  
reports temperature values in digital form using a 2-wire  
serial interface. The remote pn junction is typically the  
emitter-base junction of a common-collector pnp on a  
CPU, FPGA, or ASIC.  
♦ Tiny 3mm x 5mm µMAX Package  
♦ Thermal Diode Input  
♦ Local Temperature Sensor  
♦ Open-Drain PWM Output for Fan Drive  
♦ Programmable Fan Control Characteristics  
♦ Automatic Fan Spin-Up Ensures Fan Start  
The 2-wire serial interface accepts standard System  
Management Bus (SMBus)TM write byte, read byte,  
send byte, and receive byte commands to read the  
temperature data and program the alarm thresholds.  
The temperature data controls a PWM output signal to  
adjust the speed of a cooling fan, thereby minimizing  
noise when the system is running cool, but providing  
maximum cooling when power dissipation increases.  
The device also features an over-temperature alarm  
output to generate interrupts, throttle signals, or shut  
down signals. The MAX6641 operates from supply volt-  
ages in the 3.0V to 5.5V range and typically consumes  
500µA of supply current.  
♦ ±±1C ꢀemote Temperature Accuracy ꢁ(+61C to  
(±451C)  
♦ Controlled ꢀate of Change Ensures Unobtrusive  
Fan-Speed Adjustments  
♦ Temperature Monitoring Begins at Power-On for  
Fail-Safe System Protection  
♦ OT Output for Throttling or Shutdown  
The MAX6641 is available in a slim 10-pin µMAX® pack-  
age and is available over the -40°C to +125°C automo-  
tive temperature range.  
Ordering Information  
PIN-  
SMBus  
PKG  
PAꢀT  
PACKAGE  
ADDꢀESS  
CODE  
Applications  
Desktop Computers  
Notebook Computers  
Workstations  
MAX6641AUB90  
MAX6641AUB92  
MAX6641AUB94  
MAX6641AUB96  
10 µMAX  
10 µMAX  
10 µMAX  
10 µMAX  
1001 000x  
1001 001x  
1001 010x  
1001 011x  
U10-2  
U10-2  
U10-2  
U10-2  
Note: All devices are specified over the -40°C to +125°C tem-  
perature range.  
Servers  
Networking Equipment  
Industrial  
Pin Configuration  
TOP VIEW  
Typical Application Circuit appears at end of data sheet.  
I.C.  
DXN  
DXP  
GND  
OT  
1
2
3
4
5
10 PWMOUT  
9
8
7
6
V
CC  
MAX6641  
SMBDATA  
SMBCLK  
I.C.  
µMAX  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
SMBus is a trademark of Intel Corp.  
________________________________________________________________ Maxim Integrated Products  
±
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
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MAX6641AUB94 替代型号

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