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參數(shù)資料
| 型號(hào)： | LM85 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Hardware Monitor with Integrated Fan Control |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | QSOP-24 |
| 文件頁數(shù)： | 3/26頁 |
| 文件大?。?/td> | 261K |
| 代理商： | LM85 |
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Pin Descriptions
(Continued)
Symbol
Remote1+
Pin
18
Typ
Name and Function/Connection
Positive input (current source) from the first remote thermal diode.
Serves as the positive input into the A/D. Connected to
THERMDA pin of Pentium processor or the base of a diode
connected MMBT3904 NPN transistor.
Negative input (current sink) from the first remote thermal diode.
Serves as the negative input into the A/D. Connected to
THERMDC pin of Pentium processor or the emmiter of a diode
connected MMBT3904 NPN transistor.
Positive input (current source) from the first remote thermal diode.
Serves as the positive input into the A/D. Connected to
THERMDA pin of Pentium processor or the base of a diode
connected MMBT3904 NPN transistor.
Negative input (current sink) from the first remote thermal diode.
Serves as the negative input into the A/D. Connected to
THERMDC pin of Pentium processor or the emmiter of a diode
connected MMBT3904 NPN transistor.
Input for monitoring tachometer output of fan 1.
Input for monitoring tachometer output of fan 2.
Input for monitoring tachometer output of fan 3.
Input for monitoring tachometer output of fan 4. If in Address
Select Mode, determines the SMBus address of the LM85.
Fan speed control 1. When in XOR tree test mode, functions as
XOR Tree output.
Fan speed control 2.
R
Remote Thermal
Diode Positive
Input
Remote1
17
Remote Thermal
Diode Negative
Input
Remote2+
16
Remote Thermal
Diode Positive
Output
Remote2
15
Remote Thermal
Diode Negative
Input
F
T
I
TACH1
TACH2
TACH3
11
12
9
14
Digital Input
Digital Input
Digital Input
Digital Input
TACH4/Address
Select
PWM1/xTest
Out
PWM2
F
C
24
Digital Open-Drain
Output
Digital Open-Drain
Output
Digital Open-Drain
Output
10
PWM3/Address
Enable
13
Fan speed control 3. Pull to ground at power on to enable
Address Select Mode (Address Select pin controls SMBus
address of the device).
L
www.national.com
3
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