LM81CIMTX-3 供应商
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LM81CIMTX-3
品牌：TI 封装/批号：原厂原装/22+ -
LM81CIMTX-3
品牌：NS/ELNAF 封装/批号：TSSOP/1804+ -
LM81CIMTX-3
品牌：NSC 封装/批号：TSSOP-24P/0 -
LM81CIMTX-3/NOPB
品牌：TI(德州仪器) 封装/批号：TSSOP-24/2022+ -
LM81CIMTX-3/NOPB
品牌：NSC 封装/批号：SSOP/23+
LM81CIMTX-3 属性参数
- 制造商：National Semiconductor (TI)
- 监测电压：2.5 V, 3.3 V, 5 V, 12 V
- 输出类型：Active High, Active Low, Open Drain
- 人工复位：Not Resettable
- 监视器：Watchdog
- 电池备用开关：No Backup
- Supply Voltage - Max：3.8 V
- Supply Voltage - Min：2.8 V
- 电源电流（典型值）：400 uA
- 最大工作温度：+ 125 C
- 安装风格：SMD/SMT
- 封装 / 箱体：TSSOP
- 封装：Reel
- 最小工作温度：- 40 C
- 功率失效检测：No
- 工厂包装数量：2500
产品特性
- Temperature Sensing
- 6 Positive Voltage Inputs with Scaling Resistors to Monitor +5V, +12V, +3.3V, +2.5V, Vccp Power Supplies Directly
- 8-Bit DAC Output for Controlling Fan Speed
- 2 Fan Speed Monitoring Inputs
- Chassis Intrusion Detector Input
- WATCHDOG Comparison of all Monitored Values
- SMBus 1.0 (LM81C) and 1.1 (LM81B) Serial Bus Interface Compatibility
- LM81B has Improved Voltage Monitoring Accuracy
- VID0-VID4 Monitoring Inputs
- Voltage Monitoring Error: +2% or ±1.2% (max)
- Temperature Error −40˚C to +125˚C ± 3˚C (max)
- −40˚C to +125˚C ± 3˚C (max)
- Supply Voltage Range: 2.8V to 3.8V
- Supply Current: 0.4 mA (typ)
- ADC and DAC Resolution: 8 Bits
- Temperature Resolution: 0.5°C
产品概述
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. Serial Bus Timing Diagram
LM81CIMTX-3 数据手册
LM81CIMTX-3/NOPB
LM81CIMTX-3 电路图
