The ADM5170 is an octal line driver suitable for digital communication systems with data rates up to 116 kB/s. Input TTL or CMOS signal levels are inverted and translated into either EIA RS-232E or RS-423A signal levels depending on the status of the Mode Select inputs MS+ and MS. With both Mode Select inputs at GND, RS-423 operation is selected while with MS+ connected to VDD and MS connected to V SS, RS-232 operation is selected.