MC74ACT240MR1

Overview

The MC74ACT240MR1 is an octal buffer and line driver manufactured by onsemi, belonging to the ACT logic series. 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 high-level and low-level output currents of 24 mA each, a maximum propagation delay of 8.5 ns at 5 V, and a static current of 4 uA. It 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 capabilities for bus-oriented applications
• Features inverting three-state outputs to facilitate efficient bus management
• Delivers strong drive performance with 24 mA source and sink current capabilities
• Ensures TTL-compatible input levels for seamless integration with standard logic families

Applications

• Memory address drivers
• Clock signal distribution
• Bus-oriented transmitters and receivers

Procurement Notes

Verify the specific suffix MR1 against official datasheets to confirm tape-and-reel packaging and quantity specifications. Ensure the component matches the required ACT series characteristics and SOIC-20 footprint. Cross-reference manufacturer part numbers directly with onsemi documentation to avoid substitution errors. Confirm RoHS compliance status through official environmental declarations before procurement.

Selection Notes

Select this component when designing systems requiring octal buffering with inverting functionality and three-state control. The ACT series offers improved speed compared to older logic families while maintaining TTL compatibility. Consider the 24 mA drive strength for driving heavy capacitive loads or long bus lines. Verify that the operating voltage range aligns with the system's 5 V power supply architecture.

Part Context

This component is part of the broader 74ACT240 family of octal buffers and line drivers. It shares functional similarities with other variants like the 74ACT240MTC but differs in packaging and reel specifications. The ACT series is designed to replace slower logic families in high-density digital circuits, offering faster switching speeds and reduced power consumption relative to legacy technologies.

Replacement Considerations

Direct substitutes may include other manufacturers' 74ACT240 variants in compatible packages. Verify pinout compatibility and electrical parameters such as propagation delay and output current. Ensure that any replacement maintains the same inverting logic function and three-state output behavior.