EXAR
线路接收器, RS232/RS485, 3驱动器, 4.75V-5.25电源, SOIC-28
INTERSIL
收发器, RS232/RS485, 2驱动器, 3.15V至3.45V, QFN-40
收发器, RS232/RS485, 2驱动器, 4.5V至5.5V, QFN-40
LINEAR TECHNOLOGY
收发器, 串行, 4.75V-5.25电源, SSOP-24