ADM5170

a FEATURES Eight Single Ended Line Drivers in One Package Meets EIA Standard RS-232E, RS-423A and CCITT V.10/X.26 Resistor Programmable Slew Rate Wide Supply Voltage Range Low Power CMOS 3-State Outputs TTL/CMOS Compatible Inputs Output Short Circuit Protection Available in 28-Pin DIP/PLCC Low Power Replacement for UC5170C APPLICATIONS High Speed Communication Computer I-O Ports Peripherals High Speed Modems Printers Logic Level Translation Octal, RS-232/RS-423 Line Driver ADM5170 FUNCTIONAL BLOCK DIAGRAM ADM5170 AI A AO BI B BO CI C CO DI D DO EI E EO FI F FO GENERAL DESCRIPTION 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. The output slew rates may be controlled using an external resistor connected between the SRA (Slew Rate Adjust) pin and GND. Resistor values between 2 k Ω and 10 kΩ may be selected giving a slew rate which can be adjusted from 10 V/ µs to 2.2 V/µs. This adjustment of the slew rate allows tailoring of the output characteristics to suit the interface cable being used. The outputs may be disabled using the EN (Enable Input). This feature permits sharing of ...