DS7640 Datasheet - National Semiconductor

DS7640 Quad NOR Unified Bus Receiver

The DS7640 and DS8640 are quad 2-input receivers designed for use in bus organized data transmission systems interconnected by terminated 120X impedance lines The external termination is intended to be 180X resistor from the bus to the a 5V logic supply together with a 390X resistor from the bus to .

DS7640 Features

* Y Y Y Y Y Y Low input current with normal VCC or VCC e 0V (30 mA typ) High noise immunity (1 1V typ) Temperature-insensitive input thresholds track bus logic levels TTL compatible output Matched optimized noise immunity for ‘‘1’’ and ‘‘0’’ levels High speed (19 ns typ) Connection Diagram Dual-In

DS7640_NationalSemiconductor.pdf