Motorolas Quad EIA–422 Driver features four independent driver chains which comply with EIA Standards for the Electrical Characteristics of Balanced Voltage Digital Interface Circuits. The outputs are three–state structures which are forced to a high impedance state when the appropriate output control pin reaches a logic zero condition. All input pins are PNP buffered to minimize input loading for either logic one or logic zero inputs. In addition, internal circuitry assures a high impedance output state during the transition between power up and power down. A summary of MC3487 features include:

• 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
• DS 3487 Provides Second Source