MC74HCT240ADT1R2

Overview

The MC74HCT240ADT1R2 is an octal buffer and line driver featuring inverting logic with three-state outputs, manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes the HCT logic series for compatibility with TTL inputs. The device is housed in a 20-TSSOP surface-mount package. Key electrical specifications include a propagation delay of 28 ns at 5 V, high-level output current of -7.2 mA, and low-level output current of 7.2 mA. It supports an operating temperature range from -55 °C to +125 °C.

Feature Summary

• Octal configuration providing eight independent inverting buffer channels
• Three-state output capability enabling bus-oriented systems
• HCT logic compatibility ensuring direct interface with TTL signals

Applications

• Bus-oriented memory and address drivers
• Clock distribution circuits
• Data register buffering

Procurement Notes

Verify the specific suffix 'DT1R2' confirms the TSSOP-20 package and tape-and-reel shipping format. Ensure the component meets the required industrial temperature grade (-55 °C to +125 °C) for your application environment. Cross-reference the manufacturer part number with official datasheets to confirm pinout and electrical characteristics match system requirements before procurement.

Selection Notes

Select this component when an octal inverting buffer with three-state outputs is required for 5 V logic systems. The HCT series ensures compatibility with standard TTL input levels. Consider the TSSOP-20 package for space-constrained PCB layouts. Verify that the 28 ns propagation delay at 5 V meets the timing constraints of the target digital circuit design.

Part Context

This component belongs to the MC74HCT240A family of octal buffers and line drivers. It shares functional similarities with other devices in the 74HCT logic family but is distinguished by its specific inverting polarity and three-state output control. The device is designed for high-speed digital applications requiring robust signal driving capabilities within standard 5 V power supply environments.

Replacement Considerations

Compatible substitutes include MM74HCT240MTC and MC74HCT240ADTR2G. Verify package type (TSSOP vs SOIC) and shipping format (Reel vs Tube) when substituting. Ensure the replacement maintains the same HCT logic family and three-state functionality.