TEXAS INSTRUMENTS
差分线形驱动器, 8 驱动器
MAXIM INTEGRATED PRODUCTS
收发器, RS232, 4.5V-5.5V电源, 8驱动器, PLCC-44
ANALOG DEVICES
芯片, RS232/RS423驱动器, 八路, 116KBPS, PLCC28
EXAR
芯片, 收发器 8通道 带DCE/DTE