TEXAS INSTRUMENTS
线路驱动器, RS422, 4驱动器, 3V-3.6电源, QFN-16
INTERSIL
芯片, 驱动器, RS232, QFN-16
EXAR
芯片, 收发器, RS-232, 5.5V, QFN-32
LINEAR TECHNOLOGY
收发器, 串行, 3驱动器, 4.75V-5.25电源, QFN-38