This manual describes the DS18B20 digital temperature sensor, a 3‑pin TO‑92 device produced by Dallas. It outlines the sensor's temperature range of –55 °C to +125 °C, supply voltage of 3 V‑5.5 V, programmable resolution of 9‑12 bits, and its ability to be paralleled on a single bus.
The document details the one‑wire communication protocol, including ROM and function commands, timing diagrams for read/write operations, and example assembly code for initializing, reading, and configuring the sensor. It also includes programming notes for setting alarm thresholds and resolution. This manual is written in Chinese.
| Temperature range | -55 °C to +125 °C |
|---|---|
| Supply voltage | 3 V ~ 5.5 V |
| Resolution | 0.0625 °C (12‑bit) |
| Package | TO‑92, 3‑pin |
| Programmable bits | 9‑12 bits |
It operates from –55 °C up to +125 °C.
Multiple DS18B20 devices can be paralleled on a 3‑wire (VDD, DQ, GND) or 2‑wire (DQ, GND) bus.
The sensor works with a supply voltage between 3 V and 5.5 V.