MC74ACT541N

Overview

The MC74ACT541N is an octal buffer and line driver manufactured by onsemi, belonging to the 74ACT logic series. It features eight non-inverting channels with three-state outputs, designed for memory address driving, clock distribution, and bus-oriented transmission. The device utilizes a flow-through architecture where inputs and outputs are positioned on opposite sides of the package, facilitating microprocessor interface and improved PCB density. It operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL-compatible inputs and providing output source/sink currents of 24 mA.

Feature Summary

• Three-state outputs allow isolation from the bus when not enabled
• Flow-through pinout arrangement simplifies microprocessor interfacing
• TTL-compatible inputs ensure compatibility with standard logic families
• Non-inverting signal path preserves input data polarity

Applications

• Memory and address drivers
• Clock drivers
• Bus-oriented transmitter/receivers
• Microprocessor output ports

Procurement Notes

Verify the package type matches requirements, as the 'N' suffix typically indicates a DIP-20 package, whereas other suffixes like 'DTG' or 'DWG' denote surface-mount variants. Confirm RoHS compliance status and lead-free certification through official datasheets or manufacturer declarations before procurement. Ensure the specific lot date code meets project timelines.

Selection Notes

Select this component when a non-inverting octal buffer with high drive capability is required. The ACT series offers faster propagation delays compared to standard AC series while maintaining CMOS power efficiency. Verify that the application requires a DIP-20 through-hole package; if surface mount is needed, consider the DWG or DTG suffix alternatives. Ensure the system voltage remains within the 4.5 V to 5.5 V operating range.

Part Context

This part is part of the MC74AC(T)540/541 family of octal buffers. It serves as the non-inverting counterpart to the MC74ACT540. Functionally similar to the MC74AC244 and MC74ACT244, it differs primarily in its flow-through pinout configuration, which optimizes layout for high-density boards. It is widely used in digital systems requiring robust signal buffering and bus management.

Replacement Considerations

Compatible substitutes include MC74ACT540 (inverted output), MC74AC541 (AC series speed), and MC74ACT244 (similar function, different pinout). Cross-reference with Fairchild/ON Semiconductor equivalents such as 74ACT541. Verify package compatibility and electrical parameters before substitution.