The MAX242CWN is a transceiver IC from Analog Devices / Maxim Integrated, featuring RS232 protocol with 2/2 drivers and receivers. It operates on a 4.5V to 5.5V supply.
The Texas Instruments TRS222CDWR is a 5-V dual RS-232 transceiver designed for reliable serial communication. It offers ±15kV ESD protection on RS-232 bus pins.