Part Details for DS18B20 by Dallas Semiconductor
Results Overview of DS18B20 by Dallas Semiconductor
- Distributor Offerings: (2 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (0 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
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Applications
Environmental Monitoring
Industrial Automation
Smart Cities
Agriculture Technology
DS18B20 Information
DS18B20 by Dallas Semiconductor is a Temperature Sensor.
Temperature Sensors are under the broader part category of Sensors/Transducers.
Sensors and transducers detect and measure physical quantities like temperature, pressure, and force, converting them into electrical signals for various applications. Read more about Sensors/Transducers on our Sensors/Transducers part category page.
Price & Stock for DS18B20
| Part # | Distributor | Description | Stock | Price | Buy | |
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Bristol Electronics | 5 |
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RFQ | ||
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Vyrian | Sensors & Transducers | 899 |
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RFQ |
Part Details for DS18B20
DS18B20 CAD Models
DS18B20 Part Data Attributes
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DS18B20
Dallas Semiconductor
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Datasheet
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DS18B20
Dallas Semiconductor
Serial Switch/Digital Sensor, 12 Bit(s), 0.50Cel, Round, 3 Pin, Surface Mount, TO-92, 3 PIN
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | DALLAS SEMICONDUCTOR | |
| Package Description | TO-92, 3 PIN | |
| Reach Compliance Code | unknown | |
| Accuracy-Max (Cel) | 0.5 Cel | |
| Housing | PLASTIC | |
| JESD-609 Code | e0 | |
| Mounting Feature | SURFACE MOUNT | |
| Number of Bits | 12 | |
| Number of Terminals | 3 | |
| Operating Current-Max | 1 mA | |
| Operating Temperature-Max | 125 °C | |
| Operating Temperature-Min | -55 °C | |
| Output Interface Type | 1-WIRE INTERFACE | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Equivalence Code | SIP3,.1,50 | |
| Package Shape/Style | ROUND | |
| Sensors/Transducers Type | TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL | |
| Supply Voltage-Max | 5.5 V | |
| Supply Voltage-Min | 3 V | |
| Surface Mount | YES | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Termination Type | SOLDER |
DS18B20 Frequently Asked Questions (FAQ)
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Theoretically, up to 255 devices can be connected to a single bus, but in practice, the maximum number is limited by the bus capacitance and the pull-up resistor value. A good rule of thumb is to limit the number of devices to 10-20 per bus.
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In rare cases, multiple DS18B20 devices may have the same ROM code. To handle this, use the 'strong pull-up' method during the ROM search process, which involves temporarily connecting the DQ pin to VCC through a low-value resistor (e.g., 1 kΩ) to ensure that only one device responds to the ROM search command.
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The recommended cable length for DS18B20 devices is up to 100 meters (330 feet), but it can be extended up to 300 meters (1000 feet) with proper bus termination and cable selection. The minimum cable length is not specified, but it's recommended to use a minimum of 10 cm (4 inches) to ensure reliable operation.
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While the DS18B20 can operate from 3.0V to 5.5V, it's recommended to use a 3.3V or 3.0V power supply to ensure reliable operation and minimize power consumption. Using a 5V power supply may cause the device to consume more power than necessary and may affect its accuracy.
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To ensure proper power-on reset, connect a 0.1 μF capacitor between VCC and GND. For parasite power mode, connect a 2 kΩ to 10 kΩ resistor between VCC and DQ, and ensure that the bus is pulled up to VCC through a resistor (e.g., 4.7 kΩ) during the power-on reset period.