TC74LCX540FT(EL,M)

Overview

The TC74LCX540FT(EL,M) is a low-voltage octal bus buffer manufactured by Toshiba Semiconductor and Storage. It features inverted logic with three-state outputs and operates within a supply voltage range of 1.65 V to 3.6 V. The device provides high-speed performance with a maximum propagation delay of 6.5 ns at 3.0 V to 3.6 V. It supports an output current of 24 mA minimum at 3.0 V and includes power-down protection on all inputs and outputs. The component utilizes a TSSOP-20 surface-mount package.

Feature Summary

• Provides inverting octal bus buffering with three-state outputs controlled by two active-low enables.
• Features 5-V tolerant inputs and outputs, allowing safe interfacing between 3.3-V systems and 5-V environments.
• Includes power-down protection circuits on all inputs and outputs to prevent excessive current draw during power-off states.

Applications

• Driving 3-state memory address buses
• Clock distribution buffers
• Bus-oriented transmissions

Procurement Notes

Verify the specific ordering suffix (EL,M) against official Toshiba documentation to confirm the exact tape-and-reel packaging configuration and manufacturing date code. Ensure compliance with RoHS directives and check for any end-of-life notices or obsolescence warnings prior to finalizing procurement plans.

Selection Notes

Select this component when designing low-voltage 3.3-V systems requiring high-speed data transfer with minimal power consumption. It serves as a direct pin-compatible replacement for standard 74-series octal buffers, facilitating upgrades from older logic families without altering board layout constraints.

Part Context

This part belongs to the TC74LCX series of low-voltage CMOS logic integrated circuits. The LCX family is engineered specifically for 3.3-V applications, offering superior speed-to-power efficiency compared to traditional HC or HCT logic families while maintaining compatibility with standard digital interfaces.

Replacement Considerations

Pin and function compatible with 74AC, 74VHC, 74HC, 74F, 74ALS, and 74LS 540 types.