SN74AHCT240DW Equivalent & Substitute Parts

Part Overview

The SN74AHCT240DW is a Buffer, Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This 20-SOIC surface mount device operates across a 4.5V to 5.5V supply voltage range and is rated for -40°C to 125°C operating temperature. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production needs.

Substiute Parts

SN74AHCT240DW

Texas InstrumentsIn Stock: 1084SN74AHCT240DW Datasheet

Current PartRFQ

SN74AHCT240DWR

Texas InstrumentsIn Stock: 1683SN74AHCT240DWR Datasheet

DirectRFQ

74AHCT240D,118

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

UpgradeRFQ

74AHCT240D-Q100J

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

MFR RecommendedRFQ

MC74VHCT240ADWRG

onsemiIn Stock: 1265MC74VHCT240ADWRG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74AHCT240DW is determined by strict equivalence across the following critical parameters:

• Logic Type: Buffer, Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Current - Output High, Low: 8mA, 8mA
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into three categories based on manufacturer and product status: Direct manufacturer alternatives from Texas Instruments, upgrade options from Nexperia USA Inc., and manufacturer-recommended alternatives from onsemi.

Parameter Comparison

Engineering Selection Recommendations

SN74AHCT240DWR is the primary direct substitute, maintaining identical electrical specifications and operating temperature range (-40°C to 125°C) while offering active product status and Tape & Reel packaging for production environments.

74AHCT240D,118 and 74AHCT240D-Q100J from Nexperia USA Inc. are functionally equivalent alternatives with active status. The 74AHCT240D-Q100J variant includes AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components.

MC74VHCT240ADWRG from onsemi is a manufacturer-recommended alternative with identical electrical performance. This part operates within a reduced temperature range (-40°C to 85°C) and carries Moisture Sensitivity Level 3 (168 Hours), compared to MSL 1 (Unlimited) for other substitutes. Selection of this part requires verification that the application's operating temperature does not exceed 85°C.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT240DWR directly replace SN74AHCT240DW?

A: Yes. Both parts are electrically identical with matching logic type, element count, bit configuration, output type, current ratings, supply voltage, and operating temperature range. The primary difference is packaging format: SN74AHCT240DWR is supplied in Tape & Reel format versus tube packaging for the original part.

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

A: Both parts are electrically equivalent. The 74AHCT240D-Q100J includes AEC-Q100 automotive qualification and is designated for automotive applications. Selection depends on application requirements for automotive-grade certification.

Q: Why does MC74VHCT240ADWRG have a lower maximum operating temperature?

A: MC74VHCT240ADWRG operates to 85°C maximum, compared to 125°C for other substitutes. This part is suitable only for applications where the operating temperature remains below 85°C. Verify thermal requirements before selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original SN74AHCT240DW specification.

Q: What packaging formats are available?

A: SN74AHCT240DW was supplied in tube packaging. All active substitute parts are available in Tape & Reel format, standard for production environments.