Product Summary

The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

Parametrics

DS18B20 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground: -0.5V to +6.0V; (2)Operating Temperature Range: -55℃ to +125℃; (3)Storage Temperature Range: -55℃ to +125℃; (4)Reflow Oven Temperature: +220℃.

Features

DS18B20 features: (1)Unique 1-Wire interface requires only one port pin for communication; (2)Each device has a unique 64-bit serial code stored in an onboard ROM; (3)Multidrop capability simplifies distributed temperature sensing applications; (4)Requires no external components; (5)Can be powered from data line Power supply range is 3.0V to 5.5V; (6)Measures temperatures from -55℃ to +125℃ ; (7)±0.5℃ accuracy from 10℃ to +85℃; (8)Thermometer resolution is user-selectable from 9 to 12 bits; (9)Converts temperature to 12-bit digital word in 750ms (max.); (10)User-definable nonvolatile (NV) alarm settings.

Diagrams

DS18B20 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS18B20
DS18B20

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20/T&R
DS18B20/T&R

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20+
DS18B20+

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1: $3.59
1-25: $2.39
25-50: $1.45
50-100: $1.42
DS18B20+PAR
DS18B20+PAR

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1: $3.59
1-25: $2.39
25-50: $1.45
50-100: $1.42
DS18B20+T&R
DS18B20+T&R

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1: $2.74
1-25: $2.06
25-50: $2.00
50-100: $1.81
DS18B20-PAR
DS18B20-PAR

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20-PAR/T&R
DS18B20-PAR/T&R

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20-PAR+T&R
DS18B20-PAR+T&R

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1585: $1.27
1585-2000: $1.27