MC74ACT240ML1

Overview

The MC74ACT240ML1 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-lead SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical specifications include a high-level output current of -24 mA and a low-level output current of 24 mA. Propagation delay is specified at 8.5 ns at 5 V. The component supports surface-mount installation and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides eight inverting buffer channels with independent three-state control for bus-oriented applications.
• Utilizes advanced CMOS technology to ensure low static power consumption while maintaining high-speed performance.
• Designed for robust operation with defined output drive capabilities suitable for driving standard TTL or CMOS loads.

Applications

• Clock buffering and distribution in digital systems
• Memory address and data bus drivers
• Carry propagation in arithmetic logic units

Procurement Notes

Verify the specific suffix 'L1' against the manufacturer's latest datasheet to confirm pinout compatibility and package dimensions. Ensure the procurement source provides valid RoHS compliance documentation as required for modern electronic assemblies. Cross-reference the ordering part number with official onsemi catalogs to avoid substitutions that may differ in electrical characteristics or thermal performance.

Selection Notes

Select this component when designing circuits requiring octal inversion with tri-state isolation. It is appropriate for systems operating strictly at 5V logic levels. Consider the SOIC-20 package constraints for PCB layout. Evaluate the 8.5 ns propagation delay against system timing requirements to ensure signal integrity is maintained across the bus structure.

Part Context

This part belongs to the 74ACT series, which bridges the performance gap between older 74LS logic and faster AC technologies. The MC74ACT240ML1 variant specifically offers the octal configuration necessary for wide data buses. It is distinct from non-inverting counterparts like the 74ACT244 and complements other bus transceivers in the same logical family.

Replacement Considerations

Direct functional equivalents include the MC74ACT240MTC in a TSSOP-20 package, though physical footprint differences require board redesign. Verify that any substitute maintains the 3-state output configuration and identical voltage thresholds to prevent logic level mismatches in existing designs.