MC74ACT240NG

Overview

The MC74ACT240NG is an octal buffer and line driver from the 74ACT logic family, manufactured by onsemi. It features eight inverting outputs with three-state capability, housed in a 20-pin PDIP 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 8.5 ns at 5 V, high-level output current of -24 mA, and low-level output current of 24 mA. It functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides octal buffering and line driving capabilities with inverting logic function
• Features three-state outputs for effective bus line management and isolation
• Compatible with standard TTL input levels while utilizing CMOS technology

Applications

• Clock driver circuits requiring signal inversion and buffering
• Memory address drivers for bus interface applications
• Control signal routing in digital systems

Procurement Notes

Verify the specific suffix 'NG' corresponds to the PDIP-20 package configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor declarations prior to procurement. Ensure the ordering part number matches the required pinout and mechanical dimensions for your PCB layout design.

Selection Notes

Select this component when an octal inverting buffer with three-state control is required for 5V logic systems. The ACT series offers faster switching speeds compared to standard HC series devices. Consider the PDIP-20 package if through-hole mounting is necessary for the application environment. Verify that the 24 mA drive current meets the load requirements of the connected circuitry.

Part Context

This part belongs to the 74ACT240 family of octal buffers and line drivers. It shares functional similarities with other members like the 74ACT244 but differs in polarity and package options. The ACT series is designed for high-speed applications, bridging the performance gap between older TTL and modern CMOS technologies within the same voltage domain.

Replacement Considerations

Check for cross-reference parts such as the MC74ACT240MTC for surface-mount alternatives. Verify pin compatibility and electrical parameters before substituting with generic 74ACT240 equivalents from other manufacturers.