MC74ACT541MELG

Overview

The MC74ACT541MELG is an octal buffer and line driver from onsemi's 74ACT logic family, housed in a 20-lead SOEIAJ package. It features eight non-inverting channels with three-state outputs, enabling efficient bus sharing. The device operates within a supply voltage range of 4.5V to 5.5V and supports industrial temperatures from -40°C to +85°C. Key electrical specifications include a propagation delay of 7.5ns at 5V, symmetric output drive currents of ±24mA, and low static current consumption of 4µA.

Feature Summary

• Three-state outputs allow multiple drivers to share a common bus without signal contention when disabled.
• TTL-compatible inputs ensure direct interfacing with standard TTL logic circuits.
• High-drive capability provides ±24mA source and sink currents for robust signal transmission.

Applications

• Memory address buffering and driving
• Clock distribution networks
• Bus-oriented transceivers

Procurement Notes

Verify the specific package marking and date code against the manufacturer's latest datasheet to confirm authenticity. Ensure the procurement channel is authorized to guarantee compliance with RoHS standards and lead-free requirements. Cross-reference the part number suffix with official documentation to validate the exact pinout and electrical characteristics before integration.

Selection Notes

Select this component for designs requiring high-speed data transfer with minimal power consumption. The ACT series offers performance comparable to AC logic while maintaining TTL input compatibility. Consider the SOEIAJ package dimensions for PCB layout constraints and verify that the load capacitance does not exceed limits that would degrade the 7.5ns propagation delay specification.

Part Context

This device belongs to the MC74ACT541 series, which includes variants like MC74ACT541DTG and MC74ACT541DTR2G. These parts share identical logical functions and electrical parameters but differ in packaging styles such as TSSOP or SOEIAJ. The series is designed for general-purpose digital applications requiring reliable octal buffering in compact surface-mount formats.

Replacement Considerations

MC74ACT541DTG and MC74ACT541DTR2G are functionally equivalent alternatives within the same product family. Verify that the substitute package type fits the existing footprint and that any minor differences in thermal resistance or pin pitch do not impact the mechanical assembly.

FAQ

What is the logic polarity of the MC74ACT541MELG?

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

How does the three-state feature benefit bus systems?

It allows the outputs to enter a high-impedance state when disabled, effectively disconnecting the device from the bus to prevent interference with other active drivers.