CD74FCT240DTQM

Overview

The CD74FCT240DTQM is an octal inverting buffer and line driver manufactured by Harris Corporation. It belongs to the FCT (Fast CMOS Technology) series, utilizing BiCMOS technology for high-speed performance. The device features three-state outputs and operates within a supply voltage range of 4.5V to 5.5V. It is housed in a 20-pin QSOP surface-mount package and 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 for effective bus line management
• BiCMOS construction ensuring fast switching speeds and low power consumption

Applications

• High-speed data bus buffering applications
• Clock distribution networks requiring signal inversion
• Memory interface circuits demanding fast transition times

Procurement Notes

Verify the manufacturer origin as Harris Corporation or its successors, noting that Intersil and Renesas have acquired related assets. Confirm the specific QSOP package variant matches the DTQM suffix requirements. Check RoHS compliance status as older Harris production may not meet current environmental standards. Ensure the component is sourced from authorized distributors to avoid counterfeit parts given the legacy nature of the product line.

Selection Notes

Select this component when an octal inverting buffer with three-state outputs is required for high-speed digital interfaces. The FCT technology offers superior speed compared to standard HCT logic while maintaining CMOS compatibility. Consider the wide industrial temperature range if the application involves harsh environments. Verify that the 20-pin QSOP footprint fits the target PCB design constraints.

Part Context

This part is part of the broader CD74HCT/CD74FCT family of logic devices originally developed by Harris Semiconductor. The FCT series was designed to bridge the gap between TTL speed and CMOS power efficiency. Harris Corporation's semiconductor division was later acquired by Intersil, which subsequently merged with Renesas Electronics, affecting the current manufacturing lineage and support structure for these legacy components.

Replacement Considerations

Compatible substitutes include the CD74FCT240E and CD74FCT240ATM. These alternatives share identical logical functions and pinouts but may differ in package type or specific electrical characteristics such as propagation delay. Verify that any replacement maintains the same three-state output behavior and supply voltage requirements.