TC74VHC541FK(EL,K)

Overview

The TC74VHC541FK is an octal bus buffer fabricated with silicon gate C2MOS technology, providing non-inverted, three-state outputs. It operates within a supply voltage range of 2.0 V to 5.5 V and supports input voltages from 0 V to 5.5 V regardless of the supply level. The device features high-speed operation with typical propagation delays of 3.5 ns at 5 V and low power dissipation with a maximum quiescent current of 4 µA. It includes power-down protection on all inputs and offers balanced propagation delays.

Feature Summary

• Advanced high-speed CMOS octal bus buffer with non-inverting, three-state outputs
• Input protection circuit enabling 0 V to 5.5 V compatibility independent of supply voltage
• Power-down protection provided on all inputs to prevent device destruction during mismatched supply conditions
• Pin and function compatible with 74ALS540/541 equivalents

Applications

• Interface between 5 V and 3 V systems
• Battery backup system architectures
• Octal bus buffering applications requiring high speed and low power

Procurement Notes

Verify the specific package suffix FK corresponds to the VSSOP-20 form factor as detailed in the official Toshiba datasheet. Confirm that the ordering information matches the exact part number TC74VHC541FK(EL,K,F) or similar variants to ensure correct pinout and physical dimensions for your PCB layout requirements.

Selection Notes

Select this component when designing circuits that require interfacing between different voltage domains, specifically 5 V and 3 V systems. It is suitable for applications demanding high-speed data transfer with minimal power consumption. Ensure unused inputs are tied to either VCC or GND to maintain normal operation and prevent undefined states.

Part Context

This device belongs to the TC74VHC540/541 series of advanced high-speed CMOS octal bus buffers. The TC74VHC541 variant specifically provides non-inverted outputs, whereas the TC74VHC540 provides inverted outputs. Both share identical electrical characteristics and packaging options, differing only in logic polarity.

Replacement Considerations

The datasheet explicitly states pin and function compatibility with the 74ALS540/541 series. Designers may consider these equivalent bipolar Schottky TTL devices for direct replacement if system constraints allow for higher power dissipation.