DS18S20+ Dallas Semiconductor, DS18S20+ Datasheet

DS18S20+

Manufacturer Part Number

DS18S20+

Description

Thermometer; Digital, -55 to 125 C Range, 9 Bit Resolution, 1-Wire Output, TO-92

Manufacturer

Dallas Semiconductor

Datasheet

1.DS18S20.pdf (4 pages)

Specifications of DS18S20+

Body Style

TO-92

Brand/series

DS18S20

Function

Thermostat

Output

Voltage

Primary Type

Thermostat

Range, Measurement

125 °C

Termination

Solder

Voltage, Supply

5.5 V

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

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FEATURES

DESCRIPTION

The DS18S20 digital thermometer provides 9-bit Celsius temperature measurements and has an alarm

function with nonvolatile user-programmable upper and lower trigger points. The DS18S20

communicates over a 1-Wire bus that by definition requires only one data line (and ground) for

communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C

and is accurate to ±0.5°C over the range of –10°C to +85°C. In addition, the DS18S20 can derive power

directly from the data line (“parasite power”), eliminating the need for an external power supply.

Each DS18S20 has a unique 64-bit serial code, which allows multiple DS18S20s to function on the same

1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18S20s distributed over a

large area. Applications that can benefit from this feature include HVAC environmental controls,

temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and

control systems.

Unique 1-Wire

Port Pin for Communication

Each Device has a Unique 64-Bit Serial Code

Stored in an On-Board ROM

Multidrop Capability Simplifies Distributed

Temperature Sensing Applications

Requires No External Components

Can Be Powered From Data Line. Power

Supply Range is 3.0V to 5.5V

Measures Temperatures from -55°C to

+125°C (-67°F to +257°F)

±0.5°C Accuracy from -10°C to +85°C

9-Bit Thermometer Resolution

Converts Temperature in 750ms (max)

User-Definable Nonvolatile (NV) Alarm

Settings

Alarm Search Command Identifies and

Addresses Devices Whose Temperature is

Outside Programmed Limits (Temperature

Alarm Condition)

Applications Include Thermostatic Controls,

Industrial Systems, Consumer Products,

Thermometers, or Any Thermally Sensitive

System

Interface Requires Only One

PIN CONFIGURATIONS

(BOTTOM VIEW)

1-Wire Digital Thermometer

(DS18S20)

DALLAS

DS1820

1 2 3

TO-92

2 3

N.C.

High-Precision

SO (150 mils)

(DS18S20Z)

DS18S20

N.C.

GND

Related parts for DS18S20+

DS18S20+ Summary of contents

Page 1

FEATURES ® Unique 1-Wire Interface Requires Only One Port Pin for Communication Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM Multidrop Capability Simplifies Distributed Temperature Sensing Applications Requires No External Components Can Be Powered From ...

Page 2

... ORDERING INFORMATION PART DS18S20 DS18S20+ DS18S20/T&R DS18S20+T&R DS18S20-SL/T&R DS18S20-SL+T&R DS18S20Z DS18S20Z+ DS18S20Z/T&R DS18S20Z+T&R +Denotes a lead-free package. A “+” will appear on the top mark of lead-free packages. T&R = Tape and reel. * TO-92 packages in tape and reel can be ordered with straight or formed leads. Choose “SL” for straight leads. Bulk TO-92 orders are straight leads only ...

Page 3

ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground.....................................................................-0.5V to +6.0V Operating Temperature Range...........................................................................................-55°C to +125°C Storage Temperature Range ..............................................................................................-55°C to +125°C Solder Temperature .......................................................Refer to the IPC/JEDEC J-STD-020 Specification. Reflow Oven Temperature ................................................................................................................+220°C These are stress ratings ...

Page 4

AC ELECTRICAL CHARACTERISTICS—NV MEMORY PARAMETER NV Write Cycle Time EEPROM Writes EEPROM Data Retention AC ELECTRICAL CHARACTERISTICS PARAMETER Temperature Conversion Time Time to Strong Pullup On Time Slot Recovery Time Write 0 Low Time Write 1 Low Time Read Data ...

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