RS-232 line driver and receiver for 3V to 5.5V rails
The MAX3243CWI+ is a full-duplex RS-232 transceiver packing three drivers and five receivers into a single 28-SOIC package. It handles data rates up to 120Kbps across a supply range of 3V to 5.5V, making it a straight drop-in for mixed-voltage serial ports on industrial controllers, point-of-sale terminals, and embedded PC peripherals. The 300 mV receiver hysteresis cleans up noisy RS-232 lines — edges that jitter within that band won't toggle the output, which saves the UART from false start-bit detections on long cable runs in factory-floor environments.
28-SOIC footprint and board-fit
Surface-mount assembly with no exposed pad — standard reflow profile for JEDEC MSL-1 parts applies. The tube packaging means it feeds through most pick-and-place feeders without a reel change.