74LCX240FT(AE)

Overview

The Toshiba Semiconductor and Storage 74LCX240FT(AE) is a low-voltage octal bus buffer with inverted outputs, housed in a TSSOP-20B package. It operates within a supply voltage range of 1.65 V to 3.6 V. The device features high-speed performance with a maximum propagation delay of 6.5 ns at 3.0 V to 3.6 V. It provides a minimum output current of 24 mA at 3.0 V. Inputs and outputs are 5-V tolerant, allowing interface with 5-V environments. The component includes power-down protection on all inputs and outputs.

Feature Summary

• Inverting 3-state octal bus buffer design
• 5-V tolerant inputs and outputs for mixed-voltage interfacing
• Power-down protection on all I/O pins
• Pin and function compatibility with 74LVC/ALVC series

Applications

• 3-state memory address drivers
• Low-voltage (3.3 V) system data buffering
• Mixed-voltage signal translation between 3.3 V and 5 V domains

Procurement Notes

Verify the specific ordering suffix AE against the manufacturer's official documentation to confirm exact packaging or material specifications. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Confirm RoHS compliance status and environmental declarations prior to finalizing orders. Cross-reference the part number with the latest datasheet revision to ensure alignment with current manufacturing standards.

Selection Notes

Select this component when an inverting octal buffer is required for 3.3 V logic systems interfacing with 5 V peripherals. The 5-V tolerance feature simplifies level shifting without additional circuitry. Consider the 6.5 ns propagation delay for high-speed applications. Verify that the TSSOP-20B package fits the target PCB layout constraints. Ensure input signals remain within the specified voltage limits to maintain reliability.

Part Context

This device belongs to the 74LCX family of low-voltage CMOS digital integrated circuits. It serves as a direct functional replacement for similar octal buffers in the 74LVC and 74ALVC families due to pin compatibility. The LCX series is optimized for low-power operation while maintaining high-speed performance suitable for modern portable and battery-powered electronic devices.

Replacement Considerations

The datasheet explicitly states pin and function compatibility with the 74LVC/ALVC 240 type. No other specific substitute part numbers are documented in the provided source material.