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參數(shù)資料
| 型號： | LM81CIMTX-3 |
| 英文描述： | Single-Ended Data Acquisition System |
| 中文描述： | 單端數(shù)據(jù)采集系統(tǒng) |
| 文件頁數(shù)： | 1/33頁 |
| 文件大?。?/td> | 414K |
| 代理商： | LM81CIMTX-3 |
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LM81
Serial Interface ACPI-Compatible Microprocessor System
Hardware Monitor
General Description
The LM81 is a highly integrated data acquisition system for
hardware monitoring of servers, Personal Computers, or
virtually any microprocessor-based system. In a PC, the
LM81 can be used to monitor power supply voltages,
temperatures, and fan speeds.Actual values for these inputs
can be read at any time. Programmable WATCHDOG limits
in the LM81 activate a fully programmable and maskable
interrupt system with two outputs (INT and T_CRIT_).
The LM81 has an on-chip digital output temperature sensor
with 9-bit or 12-bit resolution, a 6 analog input ADC with 8-bit
resolution and an 8-bit DAC. Two fan tachometer outputs
can be measured with the LM81’s FAN1 and FAN2 inputs.
The DAC, with a 0 to 1.25V output voltage range, can be
used for fan speed control. Additional inputs are provided for
Chassis Intrusion detection circuits, and VID monitor inputs.
The LM81 has a Serial Bus interface that is compatible with
SMBus
.
Features
n
Temperature sensing
n
6 positive voltage inputs with scaling resistors to monitor
+5V, +12V, +3.3V, +2.5V, Vccp power supplies directly
n
8-bit DAC output for controlling fan speed
n
2 fan speed monitoring inputs
n
Chassis Intrusion detector input
n
WATCHDOG comparison of all monitored values
n
SMBus 1.0 (LM81C) and 1.1 (LM81B) Serial Bus
interface compatibility
n
LM81B has improved voltage monitoring accuracy
n
VID0-VID4 monitoring inputs
Key Specifications
j
Voltage Monitoring Error
j
Temperature Error
40C to +125C
j
Supply Voltage Range
j
Supply Current
j
ADC and DAC Resolution
j
Temperature Resolution
+2% or
±
1.2% (max)
±
3C (max)
2.8V to 3.8V
0.4 mA (typ)
8 Bits
0.5C
Applications
n
System Thermal and Hardware Monitoring for Servers
and PCs
n
Office Electronics
n
Electronic Test Equipment and Instrumentation
Typical Application
SMBus
is a trademark of the Intel Corporation.
DS100072-1
#
Indicates Active Low (“Not”)
October 2000
L
2001 National Semiconductor Corporation
DS100072
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM81CIMTX-3/NOPB | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| LM81CIMTX-32 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Serial Interface ACPI-Compatible Microprocessor System |
| LM81DH12 | 功能描述:基本/快動開關(guān) Foot Switch RoHS:否 制造商:Omron Electronics 觸點形式:SPDT 執(zhí)行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級:IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel |
| LM8-1M.5M.1 | 制造商:Banner Engineering 功能描述:LM8-1M.5M.1 LOGIC MOD MULTIBM |
| LM81-S | 功能描述:基本/快動開關(guān) Foot Switch RoHS:否 制造商:Omron Electronics 觸點形式:SPDT 執(zhí)行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級:IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel |
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