74HCT240D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT240D,652 is a logic buffer IC manufactured by Nexperia USA Inc., featuring inverting 2-element, 4-bit per element architecture with 3-state output capability. This component operates across a 4.5V to 5.5V supply range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74HCT240D,652

Nexperia USA Inc.In Stock: 105374HCT240D,652 Datasheet

Current PartRFQ

CD74HCT240M

Harris CorporationIn Stock: 1264CD74HCT240M Datasheet

SimilarRFQ

CD74HCT240M96

Texas InstrumentsIn Stock: 1074CD74HCT240M96 Datasheet

SimilarRFQ

MM74HCT240WM

Fairchild SemiconductorIn Stock: 4430MM74HCT240WM Datasheet

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MM74HCT240WMX

Fairchild SemiconductorIn Stock: 8221MM74HCT240WMX Datasheet

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SN74HCT240DW

Texas InstrumentsIn Stock: 2142SN74HCT240DW Datasheet

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SN74HCT240DWR

Texas InstrumentsIn Stock: 3260SN74HCT240DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT240D,652 is determined by the following critical parameters:

• Logic Function: Buffer, Inverting configuration with 2 elements and 4 bits per element
• Output Architecture: 3-State output capability
• Electrical Specifications: 4.5V to 5.5V supply voltage and 6mA output current ratings
• Package Type: 20-SOIC surface mount package with 0.295" width (7.50mm)
• Base Product Series: 74HCT logic family

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional equivalence within the 74HCT logic family. Variations in operating temperature range, output current capacity, product status, and compliance certifications are noted but do not affect primary substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD74HCT240M96 (Texas Instruments)

This part is the preferred substitute due to active product status and ROHS3 compliance. It maintains identical electrical specifications (6mA output current, 4.5V–5.5V supply) and package configuration. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin compared to the original part.

Secondary Recommendation: SN74HCT240DWR (Texas Instruments)

This actively produced part offers ROHS3 compliance and identical electrical performance to the original 74HCT240D,652. It is available in Cut Tape and Digi-Reel packaging formats, supporting both prototype and production volume requirements.

Alternative Options: MM74HCT240WM and MM74HCT240WMX (Fairchild Semiconductor)

Both Fairchild parts are actively manufactured with ROHS3 compliance. Output current specifications are slightly elevated (7.2mA versus 6mA), which remains within acceptable design margins for most applications. Operating temperature range is limited to -40°C to 85°C, making these suitable for standard industrial and commercial temperature environments.

Not Recommended: CD74HCT240M (Harris Corporation)

Although functionally equivalent, this part carries RoHS non-compliance status and obsolete product classification, limiting its suitability for new designs requiring regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can the 74HCT240D,652 be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts maintain the core 74HCT logic family specifications: 2-element, 4-bit inverting buffer architecture with 3-state output, 4.5V–5.5V supply operation, and 20-SOIC package configuration. Direct pin-for-pin substitution is supported.

Q: What is the significance of the output current difference between 6mA and 7.2mA?

A: The MM74HCT240WM and MM74HCT240WMX variants provide 7.2mA output current versus the standard 6mA specification. This represents a 20% increase in drive capability and does not create compatibility issues in applications designed for the original 6mA rating. Designs requiring the exact 6mA specification should select CD74HCT240M96, SN74HCT240DW, or SN74HCT240DWR.

Q: Why is the operating temperature range different across substitute parts?

A: Temperature range variations reflect different manufacturing and qualification standards applied by each semiconductor manufacturer. The original 74HCT240D,652 operates from -40°C to 125°C. Substitute parts with narrower ranges (-40°C to 85°C) are suitable for standard industrial applications. Parts with extended ranges (-55°C to 125°C) provide additional thermal margin for demanding environments.

Q: Are all substitute parts RoHS compliant?

A: Most substitute parts carry ROHS3 compliance certification. The CD74HCT240M (Harris Corporation) is RoHS non-compliant and should be avoided in applications requiring regulatory compliance documentation. MM74HCT240WMX compliance status is not specified in available data.

Q: What packaging formats are available for these substitute parts?

A: Packaging varies by manufacturer and part number. CD74HCT240M96 is supplied in Tape & Reel format. SN74HCT240DWR is available in Cut Tape and Digi-Reel formats. MM74HCT240WM and MM74HCT240WMX are supplied in bulk packaging. Selection should align with procurement volume and assembly process requirements.

Q: Is the 20-SOIC package identical across all substitute parts?

A: Yes. All substitute parts use the 20-SOIC package with 0.295" width (7.50mm). PCB footprint and assembly specifications are identical, supporting direct board-level substitution without layout modifications.