74LVC240ADTR2G Equivalent & Substitute Parts

Part Overview

The 74LVC240ADTR2G is a logic buffer IC manufactured by onsemi, featuring inverting 2-element, 4-bit per element architecture with 3-state output capability. This device operates across a 1.2V to 3.6V supply voltage range and is housed in a 20-TSSOP surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

74LVC240ADTR2G

onsemiIn Stock: 87074LVC240ADTR2G Datasheet

Current PartRFQ

MC74LCX240DTR2G

onsemiIn Stock: 3986MC74LCX240DTR2G Datasheet

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SN74LVC240ADBR

Texas InstrumentsIn Stock: 2869SN74LVC240ADBR Datasheet

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SN74LVC240APW

Texas InstrumentsIn Stock: 2269SN74LVC240APW Datasheet

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SN74LVC240APWT

Texas InstrumentsIn Stock: 1739SN74LVC240APWT Datasheet

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SN74LVCZ240APW

Texas InstrumentsIn Stock: 1309SN74LVCZ240APW Datasheet

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SN74LVCZ240APWR

Texas InstrumentsIn Stock: 1091SN74LVCZ240APWR Datasheet

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SN74LVCZ240APWT

Texas InstrumentsIn Stock: 752SN74LVCZ240APWT Datasheet

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74LVC240APW,118

NXP SemiconductorsIn Stock: 4294474LVC240APW,118 Datasheet

Parametric EquivalentRFQ

74LVC240APW/AUJ

NXP USA Inc.In Stock: 86374LVC240APW/AUJ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVC240ADTR2G is determined by the following critical parameters:

• Logic Function: Buffer, Inverting with 2 elements and 4 bits per element
• Output Configuration: 3-State output capability
• Output Current: 24mA high and low
• Package Type: 20-TSSOP surface mount form factor
• Supply Voltage Range: Minimum 1.2V to 3.6V maximum
• Operating Temperature Range: -40°C to 125°C
• Compliance: ROHS3 compliant, MSL Level 1

Substitute parts are grouped into two categories:

Direct Substitutes maintain identical or superior electrical specifications within the same 20-TSSOP package, with supply voltage ranges that encompass or exceed the original specification (1.2V ~ 3.6V) and operating temperature ranges of -40°C to 125°C.

Parametric Equivalents provide the same logic function and output characteristics but may operate within narrower voltage or temperature ranges, or use alternative packaging formats. These parts are suitable when the application requirements fall within their specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement:

The 74LVC240APW,118 (NXP Semiconductors) and 74LVC240APW/AUJ (NXP USA Inc.) are the preferred direct substitutes. Both maintain the identical supply voltage range (1.2V ~ 3.6V) and operating temperature range (-40°C ~ 125°C) as the original 74LVC240ADTR2G, with active product status and ROHS3 compliance. These parts are available in the same 20-TSSOP package and provide equivalent electrical performance.

Secondary Substitutes with Operational Constraints:

The SN74LVC240APW and SN74LVC240APWT (Texas Instruments) are suitable substitutes when the application operates within a minimum supply voltage of 1.65V. Both maintain the full -40°C to 125°C operating temperature range and are available in 20-TSSOP packaging with active product status.

The SN74LVC240ADBR (Texas Instruments) provides equivalent electrical performance but uses a 20-SSOP package (0.209" width) instead of 20-TSSOP. This substitution requires PCB layout modification and is suitable only when package footprint changes are acceptable.

Limited Substitutes with Reduced Operating Range:

The MC74LCX240DTR2G (onsemi) and SN74LVCZ240 series (Texas Instruments) operate within narrower voltage ranges (2V ~ 3.6V and 2.7V ~ 3.6V respectively) and reduced temperature ranges (-40°C ~ 85°C). These parts are suitable only for applications that do not require operation below 2V supply voltage or above 85°C ambient temperature.

Frequently Asked Questions (FAQ)

Q: Can the 74LVC240ADTR2G be directly replaced with any of these substitutes?

A: The 74LVC240APW,118 and 74LVC240APW/AUJ provide direct replacement capability with identical electrical specifications and packaging. The SN74LVC240APW and SN74LVC240APWT are direct replacements if your application operates at supply voltages of 1.65V or higher. All other substitutes have operational constraints that must be evaluated against your specific application requirements.

Q: What is the difference between 20-TSSOP and 20-SSOP packaging?

A: The 20-TSSOP package has a 0.173" width (4.40mm), while the 20-SSOP package has a 0.209" width (5.30mm). These are physically different footprints and require different PCB layouts. The SN74LVC240ADBR uses the wider 20-SSOP package and cannot be used as a drop-in replacement without PCB modification.

Q: Why do some substitutes have narrower supply voltage ranges?

A: The 74LCX and 74LVCZ series are designed for specific voltage operating windows. The MC74LCX240DTR2G operates from 2V minimum, and the 74LVCZ series operates from 2.7V minimum. These parts are suitable only if your application does not require operation at lower supply voltages.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the original 74LVC240ADTR2G.

Q: Which substitute has the best availability?

A: The 74LVC240APW,118 (NXP Semiconductors) has the highest inventory level at 42,885 pieces in stock, followed by the MC74LCX240DTR2G at 3,970 pieces. Both are active products with established supply chains.