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Keyestudio 10Pcs/lot Original DS18B20 TO-92 Temperature Sensor Digital 18B20 Chip IC DIY Electronic

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The DS18B20 digital thermometer provides 9-bit to 12-bit 
Celsius 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. 
Each DS18B20 has a unique 64-bit serial code, which 
allows multiple DS18B20s to function on the same 1-Wire 
bus. Thus, it is simple to use one microprocessor to 
control many DS18B20s distributed over a large area. 


● Unique 1-Wire Interface Requires Only One Port 
Pin for Communication
● Reduce Component Count with Integrated 
Temperature Sensor and EEPROM
• Measures Temperatures from -55°C to +125°C 
(-67°F to +257°F)
• ±0.5°C Accuracy from -10°C to +85°C
• Programmable Resolution from 9 Bits to 12 Bits
• No External Components Required
● Parasitic Power Mode Requires Only 2 Pins for 
Operation (DQ and GND)
● Simplifies Distributed Temperature-Sensing 
Applications with Multidrop Capability
• Each Device Has a Unique 64-Bit Serial Code 
Stored in On-Board ROM
● Flexible User-Definable Nonvolatile (NV) Alarm Settings 
with Alarm Search Command Identifies Devices with 
Temperatures Outside Programmed Limits
● Available in 8-Pin SO (150 mils), 8-Pin µSOP, and 
3-Pin TO-92 Packages

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