The STMicroelectronics ST3222CTR is a full duplex transceiver supporting RS232 protocol. It operates within a 3V to 5.5V range and comes in a 20-TSSOP package.
The Texas Instruments TRS3223CPWR is a full transceiver with 2 drivers and 2 receivers, designed for RS232 communication. It operates from a 3V to 5.5V supply and supports data rates up to 250kbps.