MC74ACT541NG

Overview

The MC74ACT541NG is an octal buffer and line driver manufactured by onsemi, belonging to the 74ACT logic family. 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 located on opposite sides of the package, facilitating microprocessor interface and PCB layout density. It operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL-compatible inputs and providing high drive currents of 24 mA source and sink capability.

Feature Summary

• Three-state outputs allow isolation from the bus when disabled
• Flow-through pinout arrangement simplifies microprocessor interfacing
• TTL-compatible inputs ensure compatibility with standard logic families
• High output drive current supports direct loading of multiple devices

Applications

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

Procurement Notes

Verify the specific package type associated with the NG suffix against official datasheets, as it may differ from common SOIC or TSSOP variants. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Ensure the supplier provides traceability documentation matching the manufacturer's specifications for industrial-grade reliability.

Selection Notes

Select this component when a non-inverting octal buffer with three-state control is required for high-density board layouts. The ACT series offers faster propagation delays compared to AC series while maintaining CMOS power efficiency. Verify that the system voltage remains within the 4.5 V to 5.5 V range to ensure proper logic threshold operation and signal integrity.

Part Context

This part belongs to the MC74AC(T)540/541 series of octal buffers. The 'A' denotes AC speed characteristics, while 'T' indicates TTL-compatible input thresholds. The '541' variant specifically provides non-inverting outputs, contrasting with the inverting 540 version. These devices share functional similarities with the 240 and 244 series but utilize a distinct flow-through pin configuration.

Replacement Considerations

MC74ACT541DWG

FAQ

What is the function of the two output enable pins?

The device features two output enable (OE) pins. When either OE pin is high, all outputs enter a high-impedance state, isolating them from the bus. Outputs are active only when both OE pins are low.

How does the flow-through architecture benefit PCB design?

The flow-through architecture places inputs on one side of the package and outputs on the opposite side. This arrangement allows for straighter signal traces and easier routing around microprocessors, increasing board density and simplifying layout.