74HCT240D-Q100,118

Overview

The Nexperia 74HCT240D-Q100,118 is an octal buffer and line driver with inverting outputs and three-state capabilities. It belongs to the HCT logic family, designed for TTL-compatible input levels while operating on CMOS technology. The device features two independent output enable controls, allowing configuration as a single 8-bit buffer or two 4-bit buffers. It is qualified under AEC-Q100 standards for automotive applications. The component operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a SO20 package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards
• Inverting octal buffer functionality with three-state outputs
• Dual output enable pins for flexible bus interface control
• TTL-compatible input thresholds for mixed-voltage system integration

Applications

• Automotive electronic control unit (ECU) signal buffering
• Industrial data bus interface drivers
• Telecommunications infrastructure signal routing
• Test equipment logic level translation

Procurement Notes

Verify the specific suffix 'Q100' confirms automotive grade qualification status against the official Nexperia datasheet. Ensure the SO20 package dimensions match the target PCB footprint requirements. Confirm RoHS compliance details are current per the latest manufacturing notices. Validate that the HCT logic family inputs align with the system's 5V logic levels.

Selection Notes

Select this component when inverting octal buffering with three-state isolation is required in automotive environments. The HCT series ensures compatibility with standard TTL logic inputs. Consider the dual enable structure for managing complex bus topologies. Verify thermal performance specifications if operating near the upper temperature limits.

Part Context

This part is part of the 74HCT240 family of octal buffers. It shares functional similarities with non-inverting variants like the 74HCT244 but provides inverted logic output. The Q100 designation distinguishes it from commercial grade parts by meeting stricter automotive reliability and quality standards defined by the Automotive Electronics Council.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified octal inverters such as the 74HCT244D-Q100 if non-inverting logic is acceptable. Cross-reference pinouts and electrical characteristics carefully when replacing with components from different manufacturers.