DS18B20U+

DS18B20U+ is a one‑wire digital temperature sensor (Maxim/Dallas family). It provides direct temperature readings without an external ADC and uses a unique 64‑bit ROM address on a shared 1‑Wire bus.
Key points
- Interface: 1‑Wire bus with master/slave communication; supports multiple devices on one line; family code 0x28.
- Power: Vdd 3–5.5 V or parasite power via the data line (with pull‑up).
- Temperature range: –55°C to +125°C.
- Resolution: 9–12 bits (0.5°C to 0.0625°C increments); typical accuracy about ±0.5°C in the -10°C to +85°C range.
- Memory: scratchpad with temperature LSB/MSB, alarm thresholds (TH/TL), and configuration (resolution).
- Operations: start with Convert T, then Read Scratchpad to get the temperature; optional alarm search.
- Packaging: available in various packages (TO‑92, SOT‑23, etc.).
- Applications: data logging, HVAC, automotive, IoT, hobby projects.
Quick start: connect Vdd/GND/Data (with pull‑up), use a 1‑Wire library to issue Convert T and Read Scratchpad.

DS18B20U+ is a Maxim/Dallas 1-Wire digital thermometer in a TO-92 package. Its functional equivalents are other DS18B20-family parts: the standard DS18B20 (TO-92) and DS18B20U in similar packaging. Any other vendor’s DS18B20-compatible 1-Wire temperature sensors can substitute, as long as they implement the DS18B20’s protocol and 9–12 bit resolution. Note: DS18S20 is a different, older 1-Wire device (9-bit) and not a direct drop-in.

DS18B20U+ features (1-Wire digital thermometer):
- 1-Wire interface, 3-pin (Vdd, DQ, GND); can be parasite-powered or externally supplied (3–5.5 V).
- Temperature range: -55°C to +125°C.
- Resolution: programmable 9–12 bits (0.5°C, 0.25°C, 0.125°C, 0.0625°C).
- Accuracy: typical about ±0.5°C (-10°C to +85°C); max ≈±1°C over full range.
- Conversion times: 9-bit ≈ 93.75 ms; 12-bit ≈ 750 ms (depends on resolution).
- 64-bit ROM code with family code 0x28; supports multiple devices on one 1-Wire bus.
- Scratchpad memory (9 bytes) containing temperature, TH/TL alarm thresholds, configuration, and CRC.
- Alarm functionality: high/low temperature limits and alarm flag (Alarm Search).
- Data integrity: CRC check for scratchpad data.
- Low-pin, low-power operation; requires pull-up on DQ; strong pull-up during parasite-power conversions.
- Available in common packages (e.g., TO-92) and variants.

- Pin count: 3 pins (TO-92 "U+" package)
- Function: 1-Wire digital temperature sensor
Pinout (viewing the flat face toward you, pins left to right):
1 = GND, 2 = DQ (data line), 3 = VDD (power).

Manufacturer: Maxim Integrated Products (originally Dallas Semiconductor); the brand is now part of Analog Devices.
What kind of company: a global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (including sensor and temperature-sensing ICs).

Key application areas for DS18B20U+ (1-Wire digital temperature sensor):
- Environmental monitoring: weather stations, air quality, indoor climate
- HVAC and building automation: temperature control and monitoring
- Industrial process control and equipment monitoring
- Data logging and scientific experiments (remote sensing, logging over time)
- IoT/embedded systems: Arduino, Raspberry Pi, microcontroller projects
- Cold-chain and refrigeration: monitor temperatures for perishables
- Agriculture/greenhouse and hydroponics: climate and soil-temp sensing
- Smart home devices and consumer electronics requiring precise, digital temp readouts
Features suitable for these: digital output, multi-sensor bus, low power, simple wiring.

DS18B20U+ comes in the TO-92 3‑pin plastic package (the standard transistor-style package).