DS75LVU+T&R【PDF 1/13 页】IC SENSOR TEMP DIGITAL 8MSOP

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112006

DS75LV

Digital Thermometer and Thermostat

www.maxim-ic.com

DESCRIPTION

This low-voltage (1.7V to 3.7V) digital thermometer

and thermostat provides 9-, 10-, 11-, or 12-bit digital

temperature readings over a -55癈 to +125癈 range

with ?癈 accuracy over a -25癈 to +100癈 range. At

power-up, the DS75LV defaults to 9-bit resolution for

software compatibility with the LM75. Communication

with the DS75LV is achieved through a simple 2-wire

serial interface. Three address pins allow up to eight

DS75LV devices to operate on the same 2-wire bus,

which greatly simplifies distributed temperature-

sensing applications.

The DS75LV thermostat has a dedicated open-drain

output (O.S.) and programmable fault tolerance,

which allows the user to define the number of

consecutive error conditions that must occur before

O.S is activated. There are two thermostatic

operating modes that control thermostat operation

based on user-defined trip-points (T

and T

HYST

A block diagram of the DS75LV is shown in Figure 1

and detailed pin descriptions are given in Table 1.

APPLICATIONS

Personal Computers

Cellular Base Stations

Office Equipment

Any Thermally Sensitive System

PIN CONFIGURATION

FEATURES

Operating Range from 1.7V to 3.7V

Temperature Measurements Require No

External Components

Measures Temperatures from -55?/SPAN>C to +125?/SPAN>C

(-67癋 to +257癋)

?SPAN class="pst DS75LVU-T-R_2292862_8">2?/SPAN>C Accuracy Over a -25?/SPAN>C to +100?/SPAN>C Range

Thermometer Resolution is User-

Configurable from 9 (Default) to 12 Bits (0.5癈

to 0.0625癈 Resolution)

9-Bit Conversion Time is 25ms (Max)

Thermostatic Settings are User-Definable

Data Read/Write Occurs Through a 2-Wire

Serial Interface (SDA and SCL Pins)

Data Lines Filtered Internally for Noise

Immunity (50ns Deglitch)

Bus Timeout Feature Prevents Lockup

Problems on 2-Wire Interface

Multidrop Capability Simplifies Distributed

Temperature-Sensing Applications

Pin/Software Compatible with the LM75

Available in 8-Pin ?SPAN class="pst DS75LVU-T-R_2292862_8">SOP (?SPAN class="pst DS75LVU-T-R_2292862_8">MAX) and SO

Packages

ORDERING INFORMATION

PART

TEMP RANGE PIN-PACKAGE

DS75LVS+

-55癈 to +125癈

DS75LV

(150-mil) 8-SO

DS75LVS+T&R

-55癈 to +125癈

DS75LV

(150-mil) 8-SO,

2500 Piece

Tape-and-Reel

DS75LVU+

-55癈 to +125癈

DS75LV

8-礢OP

(礛AX)

DS75LVU+T&R

-55癈 to +125癈

DS75LV

8-礢OP

(礛AX), 3000

Piece Tape-

and-Reel

Ordering Information continued at the end of the data sheet.

DS75LVSSO (150 mils)

GND

O.S.

GND

O.S.

DS75LVU糞OP/糓AX

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