DS18B20 by Maxim Integrated is a 12-bit digital temperature sensor with 1-Wire interface. It operates b/w -55 to 125°C, with ±0.5°C accuracy. Commonly used in applications requiring precise temperature monitoring like HVAC systems and industrial automation.
ULN2803ADWRG4 by Texas Instruments is a peripheral driver with 8 functions, open-collector output, and built-in transient protection. It operates b/w -40 to 85 °C with a max supply voltage of 3 V. Ideal for applications requiring sink current flow direction in a small outline package style.