MC74LCX541DTG

Overview

The MC74LCX541DTG is a low-voltage CMOS octal buffer with flow-through pinout and 3-state non-inverting outputs. It operates from a 1.65 V to 5.5 V supply, featuring 5 V-tolerant inputs and outputs for direct interface with 5 V TTL logic. The device provides balanced output sink and source capability of 24 mA at 3 V. Propagation delay ranges from 5.9 ns to 10.3 ns depending on voltage. It supports live insertion, guarantees high impedance when VCC = 0 V via IOFF, and exhibits near-zero static supply current.

Feature Summary

• Flow-through architecture allows input and output signals to traverse the package in a straight line, simplifying PCB layout for bus-oriented applications.
• 5 V tolerant I/O enables safe interfacing between low-voltage devices and legacy 5 V systems without level shifting components.
• High-impedance state isolation ensures zero power consumption during power-down or disabled states, supporting live insertion protocols.

Applications

• Memory address driving
• TTL level bus oriented transceiver applications
• Clock distribution buffers

Procurement Notes

Verify the DTG suffix corresponds to the TSSOP-20 package before ordering. Confirm RoHS compliance requirements match the Pb-Free designation. Ensure operating voltage aligns with the 1.65 V to 5.5 V range. Check automotive qualification needs against standard vs -Q suffix variants.

Selection Notes

Select this component for designs requiring bidirectional data flow across a single IC footprint. Ideal for replacing older 74ACT series parts where lower power consumption is critical. Consider the 5 V tolerance feature if mixing voltage domains within the same system bus.

Part Context

This part belongs to the MC74LCX family of low-voltage CMOS logic devices. It shares functional similarities with the MC74LCX244 but utilizes a flow-through pin configuration instead of parallel input/output placement. This specific model represents the non-inverting variant within the octal buffer category.

Replacement Considerations

MC74LCX244DTG (parallel I/O), SN74LVC541ADWR (similar LVC technology). Verify package compatibility and voltage tolerance specifications when substituting.

FAQ

What is the maximum input voltage allowed?

The DC input voltage can withstand up to 6.5 V, allowing safe operation with 5 V logic levels despite lower supply voltages.

How does the device handle power-down conditions?

The IOFF specification guarantees that outputs enter a high-impedance state when VCC is 0 V, preventing back-powering of the device.