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參數(shù)資料
| 型號： | LM94 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | TruTherTM Hardware Monitor with PI Loop Fan Control for Server Management |
| 中文描述： | TruTherTM硬件監(jiān)控的服務器管理與有價證券循環(huán)風扇控制 |
| 文件頁數(shù)： | 20/24頁 |
| 文件大小： | 693K |
| 代理商： | LM94 |
AC Electrical Characteristics
The following limits apply for +3.0 V
DC
to +3.6 V
DC
, unless otherwise noted.
Bold face limits apply for T
A
= T
J
= T
MIN
to
T
MAX
of the operating range;
all other limits T
A
= T
J
= 25C unless otherwise noted.
Symbol
Parameter
Conditions
Typical
(Note 9)
Limits
(Note 10)
Units
(Limits)
FAN RPM-TO-DIGITAL CHARACTERISTICS
Counter Resolution
Number of fan tach pulses count is
based on
Counter Frequency
Accuracy
PWM OUTPUT CHARACTERISTICS
Frequency Tolerances
Duty-Cycle Tolerance
RESET INPUT/OUTPUT CHARACTERISTICS
Output Pulse Width
Upon Power Up
Minimum Input Pulse Width
Reset Output Fall Time
SMBus TIMING CHARACTERISTICS
f
SMBCLK
SMBCLK (Clock) Clock Frequency
14
2
bits
pulses
22.5
kHz
±
6
% (max)
±
6
±
6
% (max)
% (max)
±
2
250
330
10
1
ms (min)
ms (max)
μs (min)
μs (max)
1.6V to 0.4V Logic Levels
10
100
kHz (min)
kHz (max)
t
BUF
SMBus Free Time between Stop and
Start Conditions
Hold time after (Repeated) Start
Condition. After this period, the first
clock is generated.
Repeated Start Condition Setup Time
Stop Condition Setup Time
Data Input Setup Time to SMBCLK
High
Data Output Hold Time after SMBCLK
Low
SMBCLK Low Period
4.7
μs (min)
t
HD;STA
4.0
μs (min)
t
SU;STA
t
SU;STO
t
SU;DAT
4.7
4.0
μs (min)
μs (min)
250
ns (min)
t
HD;DAT
300
1075
4.7
50
4.0
50
1
300
ns (min)
ns (max)
μs (min)
μs (max)
μs (min)
μs (max)
μs (max)
ns (max)
ms
ms (min)
ms (max)
t
LOW
t
HIGH
SMBCLK High Period
t
R
t
F
t
TIMEOUT
Rise Time
Fall Time
Timeout
SMBDAT or SMBCLK low
time required to
reset the Serial Bus
Interface to the Idle State
Time in which a device must be
operational after power-on reset
Capacitance Load on SMBCLK and
SMBDAT
31
25
35
t
POR
V
DD
>
+2.8V
500
ms (max)
C
L
400
pF (max)
L
www.national.com
20
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|---|---|
| LM94021 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Multi-Gain Analog Temperature Sensor |
| LM94021BIMG | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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| LM94021BIMGX | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM94021BIMGX/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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