RS232 Transceiver IC, 235Kbps, 3V-5.5V, Full Duplex, SSOP
Single-Chip RS-232 Transceiver, 4-Channel, 5.5V, 1mA, SSOP-16
MAX3221EAE-T, 5V, 235Kbps, Full-Duplex, RS-232 Receiver, SSOP-16