5 pc. Lots of Motorola MC3487P 

Quad EIA-422 Line Driver with 3-State Outputs

•Four Independent Driver Chains 
•Three-State Outputs 
•PNP High Impedance Inputs (PIA Compatible) 
•Fast Propagation Times (Typical 15 ns) 
•TTL Compatible 
•Single 5.0 V Supply Voltage 
•Output Rise and Fall Times Less Than 20 ns

 Plastic DIP-16 package

New old Stock