MC74ACT540DWG

Overview

The MC74ACT540DWG is an octal buffer and line driver from the 74ACT logic series, manufactured by onsemi. It features eight inverting outputs with three-state capability, housed in a 20-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a maximum static current of 8 uA and output drive currents of 24 mA for both high and low states. Propagation delay is specified at 10.5 ns at 5 V. It supports industrial operating temperatures from -40°C to +85°C.

Feature Summary

• Three-state outputs allow isolation from the bus when not selected
• TTL-compatible inputs ensure direct interface with TTL logic circuits
• Through-bone architecture places inputs and outputs on opposite sides for simplified PCB layout

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transceivers

Procurement Notes

Verify the complete part number including suffixes such as DWG against official datasheets to confirm package type and tape-and-reel options. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Cross-reference the manufacturer's latest revision history to ensure component availability and functional equivalence with previous orders.

Selection Notes

Select this component when TTL compatibility is required alongside CMOS performance. The through-bone pinout facilitates dense board layouts compared to standard parallel I/O configurations. Ensure the system power supply remains strictly within the 4.5 V to 5.5 V range to maintain signal integrity and prevent damage to the internal circuitry.

Part Context

This device belongs to the MC74ACT family of octal buffers. It serves as the inverting counterpart to the MC74ACT541. Functionally similar devices include the MC74AC240 and MC74AC244, though those lack the specific through-bone input-output arrangement that distinguishes the 540/541 series for microprocessor interface applications.

Replacement Considerations

MC74ACT541DWR2G

FAQ

Is the MC74ACT540DWG inverting or non-inverting?

It is an inverting buffer, meaning the output state is the logical complement of the input.

What is the propagation delay at 5V?

The typical propagation delay is 10.5 ns when operated at a 5 V supply voltage.