The MC74ACT244DWR2G: A High-Performance Octal Interface Solution from onsemi

In the realm of digital systems design, efficient and robust data bus management is paramount. The onsemi MC74ACT244DWR2G stands as a quintessential component for this critical task. This integrated circuit is an octal buffer and line driver fabricated with advanced CMOS technology, offering a versatile solution for bus-oriented applications requiring high drive current and three-state output control.

Housed in a space-saving SOIC-20 wide body package, the device features eight non-inverting buffers separated into two groups of four. Each group is controlled by its own Output Enable (OE) input. When the OE pin is held low, the corresponding outputs are active and reflect the data present at the input pins. When OE is driven high, those outputs enter a high-impedance state (Hi-Z), effectively disconnecting from the bus. This three-state capability is fundamental for preventing data collisions and facilitating bidirectional communication on shared bus architectures.

A key attribute of the MC74ACT244DWR2G is its ACT performance, which provides TTL-compatible input thresholds while delivering robust CMOS output swings. This ensures seamless interfacing with both older TTL logic families and modern microprocessors. The device is capable of sinking up to 24 mA of current, making it exceptionally effective for driving highly capacitive loads and long transmission lines, such as those found in backplanes and distributed networks. Furthermore, its operation is specified over a wide voltage range, typically from 4.5V to 5.5V, aligning with standard 5V system power supplies.

Engineers frequently deploy this buffer in a multitude of scenarios, including memory address driving, general-purpose bus buffering, and as an interface between a microprocessor and its peripheral devices. Its robust design and high-noise immunity characteristics make it a reliable choice for industrial and automotive environments where signal integrity is crucial.

ICGOODFIND: The onsemi MC74ACT244DWR2G is a high-speed, high-drive octal buffer essential for system integrity, providing critical isolation and amplification for data buses in complex digital systems.

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