EXAR
芯片, 收发器, RS-232, 5.5V, SSOP-28
INTERSIL
芯片, 全双工收发器, RS-422 / RS-485
NVE
芯片, 收发器, RS485, 5MBPS, 5V, SOIC-16
芯片, 收发器, RS-232, 5.5V, SSOP-16