74AHCT240D,118 Equivalent & Substitute Parts

Part Overview

The 74AHCT240D,118 is an inverting buffer logic IC manufactured by Nexperia USA Inc., designed for 5.5V operation with 2 elements, 4 bits per element, and 3-state output capability. This part is currently active in production with 764 units in stock. Alternative models are necessary to address supply chain flexibility, manufacturer preferences, automotive qualification requirements, or specific packaging needs while maintaining electrical and mechanical compatibility.

Substiute Parts

74AHCT240D,118

Nexperia USA Inc.In Stock: 85274AHCT240D,118 Datasheet

Current PartRFQ

74AHCT240D-Q100J

Nexperia USA Inc.In Stock: 89674AHCT240D-Q100J Datasheet

Parametric EquivalentRFQ

MC74VHCT240ADWRG

onsemiIn Stock: 1265MC74VHCT240ADWRG Datasheet

SimilarRFQ

SN74AHCT240DW

Texas InstrumentsIn Stock: 1084SN74AHCT240DW Datasheet

SimilarRFQ

SN74AHCT240DWR

Texas InstrumentsIn Stock: 1683SN74AHCT240DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AHCT240D,118 is determined by the following critical parameters:

• Logic Function: Buffer, Inverting with 2 elements and 4 bits per element
• Output Configuration: 3-State output
• Electrical Performance: 8mA output current (high and low), 4.5V ~ 5.5V supply voltage
• Package Compatibility: 20-SOIC form factor with 0.295" width and 7.50mm height
• Surface Mount: All substitutes must be surface mount technology
• Compliance: ROHS3 compliance required

Substitute parts are grouped into two categories:

Parametric Equivalents (identical electrical and mechanical specifications):

• 74AHCT240D-Q100J (Nexperia, automotive qualified AEC-Q100)
• SN74AHCT240DWR (Texas Instruments, active status)

Similar Parts (compatible function with minor specification variations):

• MC74VHCT240ADWRG (onsemi, 74VHCT series, operating temperature -40°C ~ 85°C)
• SN74AHCT240DW (Texas Instruments, discontinued at DiGi Electronics)

Parameter Comparison

Engineering Selection Recommendations

First Choice - Parametric Equivalents:

SN74AHCT240DWR (Texas Instruments) is the recommended primary substitute. It maintains identical electrical specifications, operating temperature range (-40°C ~ 125°C), MSL rating (1), and package configuration. Product status is active with 1623 units in stock, ensuring supply continuity.

74AHCT240D-Q100J (Nexperia) is the recommended choice for automotive applications requiring AEC-Q100 qualification. All electrical and mechanical parameters match the main part, with active product status and 811 units available.

Secondary Choice - Compatible Alternative:

MC74VHCT240ADWRG (onsemi) provides functional compatibility with identical logic configuration and output current specifications. The operating temperature range is reduced to -40°C ~ 85°C, and MSL is rated at 3 (168 Hours) versus 1 (Unlimited). This part is suitable for applications not requiring the extended temperature range of the main part. Stock availability is 1169 units.

Not Recommended:

SN74AHCT240DW (Texas Instruments) is discontinued at DiGi Electronics and should not be selected for new designs despite meeting all electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use MC74VHCT240ADWRG as a direct replacement for 74AHCT240D,118?

A: MC74VHCT240ADWRG is functionally compatible for applications operating within -40°C ~ 85°C. If your application requires operation above 85°C, this part is not suitable. The MSL rating difference (3 versus 1) may affect moisture handling during storage and assembly. Verify your operating temperature requirements before selection.

Q: What is the difference between 74AHCT240D-Q100J and 74AHCT240D,118?

A: Both parts are electrically and mechanically identical. The 74AHCT240D-Q100J includes AEC-Q100 automotive qualification, making it suitable for automotive applications. Select this variant if automotive compliance is required.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitutes use the 20-SOIC package with 0.295" width and 7.50mm height, ensuring PCB footprint compatibility.

Q: Why is SN74AHCT240DW listed if it is discontinued?

A: SN74AHCT240DW is included for reference purposes only. It meets all electrical and mechanical specifications but is discontinued at DiGi Electronics. Use SN74AHCT240DWR (active status) instead.

Q: What does MSL rating mean for component selection?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption limits during storage and assembly. MSL 1 (Unlimited) allows indefinite storage without baking. MSL 3 (168 Hours) requires baking if exposed to moisture for more than 168 hours. For standard manufacturing environments, both ratings are acceptable; verify your assembly process requirements.

Q: Can I mix different manufacturers in the same design?

A: Yes. All listed parts meet identical electrical specifications and package requirements. Mixing manufacturers is acceptable from an electrical standpoint. Verify your supply chain and quality assurance procedures support multiple sources.