ON Semiconductor MC74ACT244DW: Octal Buffer/Line Driver with 3-State Outputs

The ON Semiconductor MC74ACT244DW is a high-performance, octal buffer and line driver designed to be used in applications requiring high speed and low power consumption. This integrated circuit is part of the ACT series, which is well-known for its robustness and versatility in a wide range of digital applications. The MC74ACT244DW is particularly suitable for driving bus lines or buffer memory address registers due to its high drive capability and effective isolation of the inputs from the outputs.

This device features eight non-inverting buffers with 3-state outputs, allowing for connection to a bus-oriented system without the risk of bus contention. Each buffer has a separate output-enable (OE) input, which controls the state of the corresponding output. When OE is low, the output is active and reflects the input signal; when OE is high, the output is in a high-impedance state, effectively isolating it from the bus.

The MC74ACT244DW operates over a wide voltage range of 4.5V to 5.5V, making it compatible with TTL levels while offering the speed and drive capabilities of CMOS technology. This dual-width, surface-mount device is housed in a 20-pin SOIC package, ensuring a compact footprint suitable for space-constrained applications.

Key features of the MC74ACT244DW include:

• Octal non-inverting buffer/line driver with 3-state outputs
• Separate output-enable (OE) inputs for each buffer
• High drive capability: 24mA at the outputs
• Wide operating voltage range: 4.5V to 5.5V
• Compatible with TTL input and output voltage levels
• Low power consumption: ICC reduced by 50%
• Designed for bidirectional asynchronous communication
• 20-pin SOIC package for space-saving applications

Applications for the MC74ACT244DW are diverse and include bus driving, memory address driving, buffer memory systems, and input/output port expansion. Its ability to isolate bus lines during power-up and power-down sequences also makes it an excellent choice for preventing bus contention during these critical periods. With its high-performance features, the MC74ACT244DW from ON Semiconductor is an ideal choice for designers looking for a reliable and efficient solution for their digital interfacing needs.