Dallas DS18B20 1-Wire Digital Temperature Sensor IC, TO-92, 3-Pin, -55°C to +125°C
3 in stock
Dallas DS18B20 1-Wire digital temperature sensor IC in a 3-pin TO-92 through-hole package. Programmable 9- to 12-bit resolution with 3.0V to 5.5V supply.
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Dallas DS18B20 1-Wire Digital Temperature Sensor IC
The Dallas-marked DS18B20 is a programmable-resolution digital temperature sensor IC using the 1-Wire interface. The three-pin TO-92 device provides direct digital temperature measurements and supports individually addressed multidrop sensor networks.
Its selectable 9- to 12-bit resolution, nonvolatile alarm thresholds, and optional parasite-power operation make it useful for embedded temperature monitoring, thermostatic control, industrial systems, and distributed sensing.
Specifications:
- Part Number: DS18B20
- Package: 3-pin TO-92 through-hole
- Interface: 1-Wire digital
- Supply Voltage: 3.0V to 5.5V
- Operating Temperature Range: -55°C to +125°C
- Accuracy: ±0.5°C from -10°C to +85°C
- Resolution: 9 to 12 bit user-selectable
- 12-Bit Conversion Time: 750ms maximum
- Pinout: GND, DQ, VDD
- Addressing: Unique 64-bit ROM code
Features & Benefits:
- Single-data-line 1-Wire communication supports compact digital temperature-sensing designs.
- Unique device addressing allows multiple DS18B20 sensors to share one bus.
- Selectable resolution provides a practical tradeoff between conversion speed and measurement granularity.
- User-programmable high and low temperature alarms are retained in nonvolatile memory.
- Supports local 3.0V to 5.5V power or parasite-power operation for suitable 1-Wire installations.
Specifications
| Legacy Marking | DALLAS 18B20 |
|---|---|
| Component Type | Programmable-resolution 1-Wire digital thermometer / temperature sensor IC |
| Package Type | TO-92, 3-pin |
| Mounting Type | Through-hole |
| Pin Count | 3 |
| Interface | 1-Wire |
| Output Type | Digital |
| Supply Voltage | 3.0V to 5.5V |
| Operating Temperature Range | -55°C to +125°C |
| Accuracy | ±0.5°C from -10°C to +85°C |
| Full-Range Thermometer Error | ±2°C from -55°C to +125°C |
| Resolution | 9 to 12 bit user-selectable |
| Conversion Time | 750ms maximum |
| Active Current | 1mA typical; 1.5mA maximum |
| Standby Current | 750nA typical; 1000nA maximum |
| 1-Wire Family Code | 28h |
| Multidrop Capability | Yes |
| Parasite Power | Supported |
| Nonvolatile Memory | EEPROM for TH, TL, and configuration registers |
| EEPROM Endurance | 50,000 writes |
| EEPROM Data Retention | 10 years |
| Default Resolution | 12 bit at power-up |
| Storage Temperature Range | -55°C to +125°C |
| Solder Temperature | 260°C for 10 seconds |
| RoHS Compliant | Yes |
| Applications | HVAC environmental controls; building/equipment/machinery temperature monitoring; process monitoring and control; thermostatic controls; industrial systems; consumer products; thermometers; thermally sensitive systems |
| Operational Notes | Use external VDD rather than parasite power above +100°C; parasite-power conversions/EEPROM writes require a strong 1-Wire pullup; VDD is grounded in parasite-power mode |
| Recommended Replacement | DS18B20+ |
| Chip Family | DS18B20 |
| Data Protocol | 1-Wire |
| Long Term Drift | < 0.2°C per year |
| Max Lead Temperature | 260°C for 10 seconds |
| Name | Dallas DS18B20 Temperature Sensor |
| Operating Current | 1mA |
| Part Number | 18B20 |
| Pin Configuration | VDD, DQ, GND |
| Programmable Alerts | Yes |
| Reliable Non-volatile Memory | Yes |
| Sensor Type | Temperature |
| Temperature Range | -55°C to +125°C |
| Thermometer Error | ±0.5°C |
| Unique Serial Code | 64-bit |
| Usable in Harsh Environments | Yes |
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29 Pomp Road
Chester, New Hampshire 03036-4231
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