MC74ACT240DTR2

Overview

The MC74ACT240DTR2 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-TSSOP surface-mount package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical specifications include a propagation delay of 8.5 ns at 5 V, high-level output current of -24 mA, and low-level output current of 24 mA. Static current is specified at 4 uA, with a maximum power dissipation of 200 mW.

Feature Summary

• Provides octal buffering with three-state output control for bus-oriented communication systems.
• Features inverting logic polarity to support signal inversion requirements in digital circuits.
• Utilizes advanced CMOS technology to ensure low static power consumption during operation.

Applications

• Bus-oriented systems requiring signal buffering and direction control
• Clock drivers for distributing timing signals across multiple loads
• Memory address decoding and data register interfacing

Procurement Notes

Verify the complete part number MC74ACT240DTR2 against official onsemi documentation to confirm the specific suffix and revision level. Ensure the procurement source provides valid RoHS compliance certificates as indicated in manufacturer records. Cross-reference the datasheet revision date to guarantee alignment with current manufacturing specifications and pinout configurations before integration into design projects.

Selection Notes

Select this component when designing 5 V logic systems requiring octal buffering with three-state outputs. The 74ACT series offers speed comparable to LS TTL but with CMOS power efficiency. Consider the 20-TSSOP package for space-constrained applications. Verify that the operating temperature range of -40 C to +85 C meets environmental requirements for the target application.

Part Context

This component belongs to the 74ACT logic family, which bridges the performance gap between standard CMOS and TTL technologies. It is part of onsemi's extensive portfolio of logic integrated circuits designed for general-purpose digital applications. The octal configuration allows for efficient handling of wide data buses or parallel signal paths in complex electronic systems.

Replacement Considerations

The MC74ACT240DTR2 is listed as obsolete. Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult current onsemi catalogs for equivalent active components or consider redesigning with available alternatives that match the 74ACT specification and TSSOP-20 footprint.

FAQ

What is the logic polarity of the MC74ACT240DTR2?

The MC74ACT240DTR2 has inverting logic polarity, meaning the output state is the complement of the input state.

Does the MC74ACT240DTR2 have three-state outputs?

Yes, the device features three-state outputs, allowing it to be disconnected from the bus when not actively driving signals.