RS232 transceiver with 3/5 channel count
The ST75185CTR is a full-duplex RS232 transceiver from STMicroelectronics, integrating three drivers and five receivers in a single 20-TSSOP package. Data rate is rated at 120 Kbps — enough for standard 115200 baud and below, but not for high-speed RS232 applications above that ceiling.
Supply and temperature envelope
For industrial or automotive environments, look for a wider-temperature sibling.
Package and hand-solderability
The supplier device package is 20-TSSOP; the footprint matches standard TSSOP-20 land patterns. No exposed pad, so thermal management is through the PCB copper alone.