Datasheet > LM75/D

LM75/D

更新时间： 2024-11-23 23:47:15

品牌	Logo	应用领域
其他 - ETC		传感器温度传感器监控
页数	文件大小	规格书
12页	87K
描述
2-Wire Serial Temperature Sensor and Monitor

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LM75/D 数据手册

LM75

2-Wire Serial Temperature

Sensor and Monitor

The LM75 is a serially programmable temperature sensor that

notifies the host controller when ambient temperature exceeds a

user–programmed setpoint. Hysteresis is also programmable. The

INT/CMPTR output is programmable as either a simple comparator

for thermostat operation or as a temperature event interrupt.

Communication with the LM75 is accomplished via a two–wire bus

that is compatible with industry standard protocols. This permits

reading the current temperature, programming the setpoint and

hysteresis, and configuring the device.

http://onsemi.com

The LM75 powers up in Comparator Mode with a default setpoint

of 80°C with 5°C hysteresis. Defaults allow independent operation as

a stand–alone thermostat. A shutdown command may be sent via the

2–wire bus to activate the low–power standby mode. Address

selection inputs allow up to eight LM75’s to share the same 2–wire bus

for multi–zone monitoring.

Micro8t

DM SUFFIX

CASE TBD

All registers can be read by the host and the INT/CMPTR output’s

polarity is user programmable. Both polled and interrupt driven

systems are easily accommodated. Small physical size, low installed

cost, and ease of use make the LM75 an ideal choice for implementing

sophisticated system management schemes.

PIN CONFIGURATION

(Top View)

SDA

SCL

LM75

INT/CMPTR 3

GND 4

6 A1

5 A2

Features

• Temperature Sensing: 0.5°C Accuracy (Typ.)

• Operates from: –55°C to +125°C

• Operating Range: 2.7 V – 5.5 V

• Programmable Trip Point and Hysteresis with

Power–up Defaults

ORDERING INFORMATION

• Standard 2–Wire Serial Interface

• Thermal Event Alarm Output Functions as Interrupt or Comparator /

Thermostat Output

See detailed ordering and shipping information on page 10 of

this data sheet.

• Up to 8 LM75’s May Share the Same Bus

• Shutdown Mode for Low Standby Power Consumption

DEVICE MARKING INFORMATION

See general marking information in the device marking

section on page 10 of this data sheet.

• 5.0 V Tolerant I/O at V = 3.0 V

• Low Power 250 µA (Typ.) Operating, 1.0 µA (Typ.)

Shutdown Mode

Typical Applications

• Thermal Protection for High Performance CPUs

• Solid–State Thermometer

• Fire/Heat Alarms

• Thermal Management in Electronic Systems:

Computers

Telecom Racks

Power Supplies / UPS

• Copiers / Office Electronics

• Consumer Electronics / Amplifiers

• Process Control

Semiconductor Components Industries, LLC, 2000

Publication Order Number:

September, 2000 – Rev. 1

LM75/D

12 3 4 5 6 7...12

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