DS18B20 Programmable Resolution One-Wire Temperature Sensor
The DS18B20 digital thermometer provides 9 to 12-bit resolution temperature measurements, with a programmable non-volatile temperature alarm setting. It communicates via a one-wire protocol, requiring only one data pin and ground. The temperature range is -55C to +125C (-67F to +257F), with an accuracy of 0.4C in the -10C to 70C range. It supports parasitic power mode, drawing power directly from the data line, eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial number, allowing multiple devices to be connected in a network on the same one-wire bus, controlled by a single processor. This makes it ideal for applications like HVAC, building and equipment monitoring, grain temperature monitoring, and industrial process control.
Product Attributes
- Brand: HUAXUANYANG
- Origin: Shenzhen HuaXuanYang Electronics CO.,LTD
- Model: DS18B20
- Website: www.hxymos.com
Application Scenarios
- Temperature Control
- Industrial Systems
- Consumer Products
- Grain Temperature Monitoring
- Thermometers
- Any heat-sensing system
Technical Specifications
| Feature | Specification |
| Interface | One-Wire |
| Serial Number | Unique 64-bit |
| Power Supply | 2.5V to 5.5V (via data line or VDD pin) |
| Temperature Range | -55C to +125C (-67F to +257F) |
| Accuracy | 0.4C (from -10C to 70C) |
| Resolution | 9 to 12-bit, selectable |
| Temperature Conversion Time | <750ms (at 12-bit resolution) |
| Alarm Function | User-definable non-volatile temperature alarm settings, alarm search command |
| ESD Protection | HBM 8000V, MM 800V |
| Package | TO-92 (3-pin) |
| CRC Generator | Yes (for data integrity) |
| Memory | 64-bit ROM, scratchpad SRAM, EEPROM for TH, TL, and configuration registers |
| Configuration Register | Sets temperature resolution (9, 10, 11, or 12 bits) |
| Parasitic Power Mode | Supported (VDD pin must be connected to ground) |
| Operating Current (Parasitic Mode) | Up to 1.5mA during temperature conversion or EEPROM data transfer |
| Strong Pull-up | Required for parasitic power during temperature conversion or EEPROM copy |
| Default Power-on State | Low power standby |
| Default Temperature Register Value (Power-on Reset) | +85C |
| Default Configuration (Power-on) | R0=1, R1=1 (12-bit resolution) |
2509181606_HXY-MOSFET-DS18B20_C5451632.pdf
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