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參數(shù)資料
| 型號(hào)： | LM81BIMT-3 |
| 英文描述： | DATA ACQ SYSTEM|6-CHANNEL|8-BIT|TSSOP|24PIN|PLASTIC |
| 中文描述： | 數(shù)據(jù)ACQ木材系統(tǒng)| 6聲道| 8位| TSSOP封裝| 24針|塑料 |
| 文件頁數(shù)： | 1/33頁 |
| 文件大小： | 388K |
| 代理商： | LM81BIMT-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, tem-
peratures, 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
DS100072-1
#
Indicates Active Low (“Not”)
February 2002
L
2002 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 |
|---|---|
| LM81BIMT-3/NOPB | 功能描述:監(jiān)控電路 Improved Syst HW Mon RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| LM81BIMT-3/NOPB | 制造商:Texas Instruments 功能描述:, Resolution (Bits):8, Data Interface:Se |
| LM81BIMTX-3 | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| LM81BIMTX-3/NOPB | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| LM81C1MTX-3 | 制造商:Texas Instruments 功能描述: |
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