74LVC544AD,118 Equivalent & Substitute Parts

Part Overview

The 74LVC544AD,118 is an inverting transceiver IC manufactured by NXP USA Inc., designed for logic-level signal inversion and buffering applications. This device features 1 element with 8 bits per element, 3-state output capability, and operates across a supply voltage range of 1.2V to 3.6V. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

74LVC544AD,118

NXP USA Inc.In Stock: 77974LVC544AD,118 Datasheet

Current PartRFQ

SN74LVT574DWR

Texas InstrumentsIn Stock: 2214SN74LVT574DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVC544AD,118 is determined by the following critical parameters:

• Logic Function: Transceiver with inverting capability and 3-state output
• Bit Configuration: 1 element, 8 bits per element
• Output Drive Capability: Minimum 24mA output current (high and low)
• Supply Voltage Range: Compatibility within 1.2V to 3.6V operating window
• Package Type: Surface mount SOIC package with 7.50mm width
• Operating Temperature Range: -40°C to 125°C minimum
• Compliance: ROHS3 and REACH compliance required

The identified substitute, SN74LVT574DWR, operates as a D-type flip-flop with tri-state output in the 74LVT logic family. While functionally distinct from the inverting transceiver topology, this device provides equivalent 8-bit data handling, 3-state output capability, and compatible electrical characteristics within overlapping supply voltage and temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

The 74LVC544AD,118 is obsolete and no longer in active production. The SN74LVT574DWR is an active product from Texas Instruments with equivalent 8-bit data handling and 3-state output architecture. Both devices maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards.

Key considerations for selection:

• Supply Voltage: The SN74LVT574DWR operates at 2.7V minimum, compared to 1.2V for the 74LVC544AD,118. Applications requiring sub-2.7V operation cannot use this substitute.
• Operating Temperature: The 74LVC544AD,118 supports extended temperature operation to 125°C, while the SN74LVT574DWR is rated to 85°C maximum. High-temperature applications may require alternative solutions.
• Output Current: The SN74LVT574DWR provides higher output drive capability (32mA/64mA vs. 24mA/24mA), suitable for applications requiring increased fan-out or lower impedance loads.
• Package Footprint: The SN74LVT574DWR uses a 20-pin SOIC package versus the 24-pin SOIC of the main part, requiring PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVT574DWR directly replace the 74LVC544AD,118 without circuit modification?

A: Direct pin-for-pin replacement is not possible due to different package pin counts (20-SOIC vs. 24-SOIC). Circuit redesign and PCB layout changes are required. Additionally, functional differences between inverting transceiver and D-type flip-flop topologies must be evaluated for application compatibility.

Q: What is the minimum supply voltage difference between these parts?

A: The 74LVC544AD,118 operates from 1.2V minimum, while the SN74LVT574DWR requires 2.7V minimum. Applications operating below 2.7V cannot use the substitute without additional voltage regulation or alternative component selection.

Q: Are both parts compliant with current environmental and regulatory standards?

A: Yes. Both the 74LVC544AD,118 and SN74LVT574DWR are ROHS3 compliant and REACH unaffected, meeting current environmental regulations. Both carry MSL Level 1 rating, indicating unlimited shelf life under controlled storage conditions.

Q: How do the output drive capabilities compare?

A: The SN74LVT574DWR provides higher output current (32mA high, 64mA low) compared to the 74LVC544AD,118 (24mA high, 24mA low). This increased drive capability allows the substitute to support higher fan-out and lower impedance load applications.

Q: What is the temperature operating range limitation?

A: The 74LVC544AD,118 supports -40°C to 125°C operation, while the SN74LVT574DWR is limited to -40°C to 85°C. Applications requiring operation above 85°C cannot use the substitute.