MC74ACT541M

Overview

The MC74ACT541M is an octal buffer and line driver from the onsemi ACT logic series, housed in a 20-pin SOIC package. It features non-inverting outputs with three-state capability, allowing for high-impedance isolation when disabled. The device operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL-compatible inputs for direct interfacing with legacy logic families. Key electrical parameters include a maximum propagation delay of 7.5 ns at 5 V, output drive currents of ±24 mA, and a static current of 8 µA. It functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Flow-through architecture with inputs and outputs positioned on opposite sides of the package to facilitate microprocessor interface and PCB layout density.
• Three-state outputs enable bus-oriented transmission by isolating the device from the bus when the output enable signals are inactive.
• TTL-compatible input thresholds allow direct connection to Transistor-Transistor Logic circuits without additional level shifting.

Applications

• Memory and address drivers
• Clock signal distribution
• Bus-oriented transmitter and receiver circuits

Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the selected variant matches the required operating temperature range and packaging style for your assembly process. Cross-reference ordering information with authorized distributors to confirm current availability and compliance status.

Selection Notes

Select this component when a non-inverting octal buffer with flow-through pin configuration is required for high-density board layouts. The ACT series offers improved speed compared to standard AC devices while maintaining CMOS power efficiency. Consider the dual output enable pins for flexible bus control strategies in complex digital systems.

Part Context

This part belongs to the 74ACT541 family of octal buffers, functionally similar to the 74AC541 but with TTL-compatible inputs. It serves as a key component in digital logic designs requiring robust signal driving capabilities and bus isolation. The flow-through design distinguishes it from other octal buffers like the 74AC244, optimizing trace routing for processor interfaces.

Replacement Considerations

MC74ACT541DWG

FAQ

What is the logic polarity of the MC74ACT541?

The MC74ACT541 provides non-inverting (true) output logic, meaning the output state follows the input state directly.

How does the flow-through architecture benefit circuit design?

By placing inputs on one side of the package and outputs on the opposite side, the flow-through architecture simplifies PCB routing and allows for greater board density, particularly when interfacing with microprocessors.