2N2222A by Texas Instruments is a small signal NPN bipolar junction transistor (BJT) with a max collector-emitter voltage of 40V and a max collector current of 0.8A. It is commonly used for switching applications due to its fast turn on/off times (35ns/285ns) and high transition frequency (300MHz).
FTDI's FT232RQ-REEL is a USB bus controller with 32 terminals, operating at 3.3-5.25V. It supports data transfer rates up to 60MBps and clock frequency of 12.02MHz, suitable for RS232/RS422/RS485 interfaces in various applications like industrial automation and communication systems.
LP2950CDT-3.3G by Onsemi is a fixed positive single output LDO regulator with a nominal output voltage of 3.3V and max output current of 0.1A. It has a small outline package style, operates at temperatures ranging from -40 to 125 °C, and is suitable for applications requiring low dropout voltage and precise voltage regulation in electronic circuits.
ULN2803ADW by Texas Instruments is a peripheral driver with 8 functions, open-collector output characteristics, and built-in transient protections. It operates b/w -40 to 85 °C and has a max supply voltage of 3 V. Ideal for applications requiring buffer or inverter-based peripheral drivers with sink current flow direction.