MC74ACT540DTR2G

Overview

The MC74ACT540DTR2G is an octal buffer and line driver from the onsemi 74ACT logic family, housed in a 20-lead TSSOP package. It operates within a supply voltage range of 4.5 V to 5.5 V. The device features non-inverting outputs with three-state capability, allowing for high-impedance isolation when disabled. Key electrical specifications include a propagation delay of 11 ns at 5 V, output drive currents of ±24 mA, and a maximum static current of 8 µA. It supports industrial operating temperatures from -40°C to +85°C.

Feature Summary

• Octal configuration providing eight independent non-inverting buffer channels in a single integrated circuit.
• Three-state output architecture enables direct connection to bus-oriented systems by isolating outputs when disabled.
• TTL-compatible inputs ensure seamless interfacing with standard TTL logic devices without additional level shifting.
• High-drive output capability delivers ±24 mA source and sink currents for robust signal transmission.

Applications

• Memory address and data bus drivers
• Clock distribution circuits
• Bus-oriented microprocessor systems

Procurement Notes

Verify the specific suffix DTR2G corresponds to the TSSOP-20 surface-mount package and tape-and-reel quantity. Confirm RoHS compliance status through official manufacturer documentation or material declarations prior to integration. Ensure the ordering part number matches the required lead-free and halogen-free specifications for your manufacturing process.

Selection Notes

Select this component when an octal, non-inverting buffer with three-state control is required for 5V CMOS applications. It is suitable for designs needing TTL input compatibility and high drive strength. Consider alternative packages like SOIC if pin count or thermal requirements differ. Verify that the 11 ns propagation delay meets the timing constraints of the target system.

Part Context

This device belongs to the MC74ACT series, which combines the speed of Advanced CMOS technology with TTL-compatible inputs. It serves as a digital logic buffer designed for high-density PCB layouts. The octal structure reduces component count compared to using multiple quad buffers, simplifying schematic design and board space allocation for complex digital interfaces.

Replacement Considerations

MC74ACT540DW (SOIC-20 package variant). MC74AC540 (AC series with similar function but different speed/power profile).