74AHCT240D,112

Buffers, Drivers, Receivers, Transceivers Overview

The Nexperia 74AHCT240D,112 is an octal buffer and line driver featuring inverting logic with three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V. The device provides balanced propagation delays ranging from 1.0 ns to 8.5 ns depending on load conditions. It includes Schmitt-trigger inputs for noise immunity and accepts voltages higher than VCC. ESD protection exceeds 2000 V (HBM) and 1000 V (CDM). Operating temperatures span from -40 °C to +125 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Inverting octal buffer/line driver with three-state outputs controlled by two separate enable signals.
• All inputs feature Schmitt-trigger action to tolerate slower input rise and fall times.
• Inputs are overvoltage tolerant, accepting voltages higher than the supply voltage VCC.
• Operates with TTL input levels while providing high noise immunity.

Buffers, Drivers, Receivers, Transceivers Applications

• Translating signals between mixed voltage environments
• Clock distribution and buffering
• Memory address and data bus drivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix '112' against current Nexperia documentation to confirm packaging details and availability status. Confirm that the SOIC-20 package variant matches your PCB footprint requirements. Check for any recent lifecycle notices regarding obsolescence or last-time buy dates before finalizing procurement plans.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an inverting octal buffer with three-state control is required for 5 V logic systems. The AHCT series ensures compatibility with TTL input thresholds. Ensure the design accommodates the specified operating temperature range and power dissipation limits for the chosen package type.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Nexperia 74AHCT family of high-speed Si-gate CMOS devices. It is functionally similar to the 74HC240 but features TTL-compatible input switching levels. The device is designed for applications requiring fast switching speeds and low power consumption in standard 5 V digital logic environments.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-to-pin replacements include the 74AHCT240PW and 74AHCT240BQ from Nexperia, offering alternative packages such as TSSOP20 and DHVQFN20 respectively. Cross-family equivalents like the 74HC240 may require voltage level adjustments due to different input threshold characteristics.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the 74AHCT240 handle inputs with voltages exceeding VCC?

The inputs are overvoltage tolerant, allowing them to accept voltages higher than the supply voltage VCC without damage, facilitating use in mixed-voltage environments.

What is the effect of the Schmitt-trigger action on the inputs?

The Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times, improving noise immunity compared to standard logic gates.