The Texas Instruments MAX232IDW is a dual RS-232 transceiver designed for reliable serial communication. It operates from a single 5V supply and supports data rates up to 120Kbps.
The Texas Instruments DS34C86TM/NOPB is a quad CMOS differential line receiver designed for RS-422 and RS-423 communication. It operates over a temperature range of -40°C to 85°C and comes in a 16-SOIC package.