ZT3243F Low Power +3V to +5.5V, 3D/5R 1000kbps RS2.
ZT3243F - (ZT3241F / ZT3243F) 3D/5R 1000kbps RS232 Transceivers
ZT3241F - (ZT3241F / ZT3243F) 3D/5R 1000kbps RS232 Transceivers