Bus Driver Type B684

Summary: The B684 is a dual-purpose, non-inverting bus driver designed to provide standard logic levels and a -3V power supply. It is intended to drive large numbers of inverter and diode loads or 90-ohm cables. The device features two types of outputs: a "Direct" output for short-distance, heavy-load driving (capable of ±40 mA) and a "Resistor" output designed for terminated 93-ohm or 100-ohm cables. The document provides specific electrical specifications, including power consumption requirements for loaded and unloaded states, input capacitance (8 pf), and a propagation delay of approximately 30 nsec. Proper grounding and termination practices are noted to ensure circuit stability.