MC74ACT540DW

Overview

The MC74ACT540DWG is an octal buffer and line driver manufactured by onsemi, belonging to the 74ACT logic series. It features eight non-inverting inputs and outputs 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 specifications include a maximum propagation delay of 7.5 ns at 5 V, with output drive capabilities of -24 mA for high-level current and 24 mA for low-level current. Static current is specified at 8 uA, while operating power consumption reaches 80 uA. The component supports surface mount installation and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides octal buffering and line driving functionality with non-inverting signal paths.
• Features three-state outputs allowing direct connection to bus-oriented systems.
• Compatible with TTL input levels when operated at standard 5 V supply voltages.

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffer circuits
• Memory register drives

Procurement Notes

Verify the specific suffix against the ordered part number, as the provided data references MC74ACT540DWG. Confirm moisture sensitivity level (MSL) ratings and reflow soldering profiles prior to assembly. Ensure the procurement source provides valid RoHS compliance documentation consistent with the manufacturer's current environmental declarations.

Selection Notes

Select this component for applications requiring high-speed octal buffering with TTL-compatible input thresholds. The ACT series offers faster switching speeds compared to standard AC devices while maintaining CMOS noise immunity. Verify that the system load capacitance remains within limits to maintain the specified 7.5 ns propagation delay performance at the target operating frequency.

Part Context

This component is part of the broader 74ACT family of high-speed CMOS logic devices produced by onsemi. It serves as a functional equivalent to other octal buffers in the industry, designed for use in digital systems requiring robust signal integrity and bus interfacing capabilities. The device integrates eight independent channels into a single compact package.

Replacement Considerations

MC74ACT540DWR2G is a tape-and-reel variant of the same logical function. Cross-reference with MC74AC540DWG for AC-series alternatives, noting differences in speed and voltage compatibility.