MAXIM INTEGRATED PRODUCTS
收发器, RS232, 4.5V-5.25V电源, 5驱动器, WSOIC-28
收发器RS232, RS422, RS485, 3V-5.5V电源, 2驱动器, SSOP-20
EXAR
芯片, 收发器, RS232/485, 可编程, 28WSOIC