RS-232 transceiver in 20-TSSOP — supply range and noise margin
The MAX3224EUP+ is a full-duplex RS-232 transceiver with two drivers and two receivers, operating from a 3V to 5.5V supply rail. It handles data rates up to 250kbps, which covers standard UART communication for industrial control, point-of-sale terminals, and embedded debug ports. Receiver hysteresis is specified at 500 mV — this filters noise on long cable runs or in electrically noisy enclosures where ground shifts can corrupt single-ended RS-232 signals. The hysteresis threshold means a 500 mV dead band around the switching point, reducing false edges from coupled transients.
Package, temperature grade, and board-fit
Housed in a 20-TSSOP (4.40 mm width) surface-mount package, the MAX3224EUP+ fits standard PCB footprints for serial interface ICs.