The NXP HEF40244BT: A High-Performance Octal Buffer/Line Driver for Bus Interface Applications

The NXP HEF40244BT is a monolithic integrated circuit fabricated with the proven HEF CMOS technology. It serves as an octal buffer/line driver with 3-state outputs, designed to function as a high-performance, non-inverting interface between data lines and system buses. Each of its eight independent channels is capable of both sourcing and sinking significant current, making it ideal for driving highly capacitive or relatively low-impedance loads.

A key feature is the two active-low output enable inputs (OE1 and OE2), each controlling four buffers. When a respective OE input is held high, those outputs are placed in a high-impedance state, effectively disconnecting them from the bus and allowing other devices to drive the line without contention. This 3-state capability is fundamental for constructing shared bus architectures in microprocessors, memory systems, and various digital data paths.

ICGOOODFIND: The HEF40244BT is a robust and efficient solution for bus interfacing, offering high drive strength and essential 3-state control for conflict-free operation in complex digital systems.

Keywords: 3-State Outputs, Octal Buffer, Line Driver, Bus Interface, High-Impedance State