Datasheet > LM64CILQ-F/NOPB

LM64CILQ-F/NOPB

更新时间： 2024-11-25 06:08:59

品牌	Logo	应用领域
美国国家半导体 - NSC		输出元件传感器换能器
页数	文件大小	规格书
29页	370K
描述
Switch/Digital Output Temperature Sensor, DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 1Cel, RECTANGULAR, SURFACE MOUNT, LLP-24

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LM64CILQ-F/NOPB 数据手册

December 2003

LM64

1˚C Remote Diode Temperature Sensor with PWM Fan

Control and 5 GPIO’s

General Description

Key Specifications

n Remote Diode Temperature Accuracy (includes

The LM64 is a remote diode temperature sensor with PWM

fan control. The LM64 accurately measures its own tempera-

ture and that of a remote diode. The LM64 remote tempera-

ture accuracy is factory trimmed for a MMBT3904 diode-

quantization error)

Ambient Temp

30˚C to 50˚C

0˚C to 85˚C

Diode Temp

120˚C to 140˚C

25˚C to 140˚C

Max Error

1.0˚C (max)

3.0˚C (max)

connected transistor with

16˚C offset for high

temperatures. T_{ACTUAL DIODE JUNCTION}= T_LM64+ 16˚C

The LM64 features a PWM, open-drain, fan control output, 5

GPIO (General Purpose Input/Output) and 5 GPD (General

Purpose Default) pins. The 8-step Lookup Table allows for a

non-linear fan speed vs. temperature transfer function often

used to quiet acoustic fan noise.

n Local Temp Accuracy (includes quantization error)

Ambient Temp

Max Error

25˚C to 125˚C

3.0˚C (max)

n Power Supply Requirements

Features

Supply DC Voltage

Supply DC Current

3.0 V to 3.6 V

1.1 mA (typ)

n Accurately senses remote and local diode temperatures

n Integrated PWM fan speed control output

n Programmable 8-step Lookup Table for quieting fans

Applications

ALERT and T_Crit open-drain outputs

n Tachometer input for measuring fan RPM

n 10 bit plus sign remote diode temperature data format,

with 0.125˚C resolution

n SMBus 2.0 compatible interface, supports TIMEOUT

n 5 General Purpose Input/Output pins

n 5 General Purpose Default input pins

n 24-pin LLP package

n Computer Processor Thermal Management

n Graphics Processor Thermal Management

n Voltage Regulator Modules

n Electronic Instrumentation

n Power Supplies

n Projectors

Connection Diagram

20065501

DS200655

www.national.com

12 3 4 5 6 7...29

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