74HC367D

The MAX232 device is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/EIA-232-F voltage levels from a single 5V supply. Each receiver converts TIA/EIA-232-F inputs to 5V TTL/CMOS levels. These receivers have a typical threshold of 1.3 V, a typical hysteresis of 0.5V, and can accept ±30V inputs. Each driver converts TTL/CMOS input levels into TIA/EIA-232-F levels. Brand : Texas Instruments DATASHEET

The LM2576HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V, 12V, 15V and adjustable output versions. Brand : HTC DATASHEET

The LM29300 are high current, high accuracy, low-dropout voltage regulators. Using process with a PNP pass element, these requlators feature 350mV (full load) dropout voltages and very low ground current. Brand : HTC DATASHEET

The ILX3232 is a 3.3V powered EIA/TIA-232 and V.28/V.24 communication interface with low power requirements, high data-rate capabilities. ILX3232 has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3.3vVto 5.5V supplies. The device requires only four small 0.1 µF standard external capacitors for operations from 3.3V supply. Brand : IK SEMICON DATASHEET