Datasheet > LM80

LM80

更新时间： 2024-09-23 22:31:11

品牌	Logo	应用领域
美国国家半导体 - NSC		微处理器监控
页数	文件大小	规格书
29页	438K
描述
Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor

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LM80 数据手册

June 1999

LM80

Serial Interface ACPI-Compatible Microprocessor System

Hardware Monitor

n WATCHDOG comparison of all monitored values

n Separate input to show status in Interrupt Status

General Description

The LM80 provides 7 positive voltage inputs, temperature

measurement, fan speed measurement, and hardware

as the LM56 or LM75

™

monitoring on an I C

interface. The LM80 performs

n I²C Serial Bus interface compatibility

™

WATCHDOG comparisons of all measured values and an

open-drain interrupt output becomes active when any values

exceed programmed limits. A Chassis Intrusion input is pro-

vided to monitor and reset an external circuit designed to

latch a chassis intrusion event.

n Shutdown mode to minimize power consumption

n Programmable RST_OUT/OS pin: RST_OUT provides a

Reset output; OS provides an Interrupt Output activated

by an Overtemperature Shutdown event

The LM80 is especially suited to interface to both linear and

digital temperature sensors. The 10 mV LSB and 2.56 volt

input range is ideal for accepting inputs from a linear sensor

such as the LM50. The BTI is used as an input from either

digital or thermostat sensors such as LM75 and LM56.

Key Specifications

n Voltage monitoring Error

1% (max)

n Temperature Error

−25˚C to +125˚C

3˚C (max)

The LM80’s 2.8V to 5.75V supply voltage range, low supply

current, and I²C interface make it ideal for a wide range of

applications. These include hardware monitoring and protec-

tion applications in personal computers, electronic test

equipment, and office electronics.

n Supply Voltage Range

n Supply Current

2.8V to

5.75V

Operating:

Shutdown:

0.2 mA typ

15 µA typ

8 Bits

n ADC Resolution

Features

n Temperature sensing

n Temperature Resolution

0.5˚C

n 7 positive voltage inputs

n 2 programmable fan speed monitoring inputs

n 10 mV LSB and 2.56V input range accepts outputs from

linear temperature sensors such as the LM50

n Chassis Intrusion Detector input

Applications

n System Thermal and Hardware Monitoring for Servers

and PCs

n Office Electronics

n Electronic Test Equipment and Instrumentation

Typical Application

DS100040-1

# Indicates Active Low (“Not”)

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

™

WATCHDOG is a trademark of National Semiconductor Corporation.

C^®is a registered trademark of the Philips Corporation.

DS100040

www.national.com

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与LM80相关器件

型号	品牌	获取价格	描述	数据表
LM80_01	NSC	获取价格	Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor
LM8003	UTC	获取价格	3 SIRENS AND MACHINE GUN WITH 2 LEDS
LM8003_15	UTC	获取价格	3 SIRENS AND MACHINE GUN WITH 2 LEDS
LM8031_SERIES	ETC	获取价格
LM8050I	ONSEMI	获取价格	TRANSISTOR 800 mA, 25 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, TO-226, 3 PIN, BIP Gener
LM8050I/D	ETC	获取价格	Amplifier Transistors
LM8050J	ONSEMI	获取价格	800mA, 25V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, TO-226, 3 PIN
LM8051_SERIES	ETC	获取价格
LM8061	ETC	获取价格
LM8062	ETC	获取价格

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