CD74HCT240M Equivalent & Substitute Parts

Part Overview

The CD74HCT240M is a Buffer, Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This device operates across a 4.5V to 5.5V supply range and is housed in a 20-SOIC surface mount package. The part is currently in Last Time Buy status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

CD74HCT240M

Texas InstrumentsIn Stock: 1169CD74HCT240M Datasheet

Current PartRFQ

CD74HCT240M96

Texas InstrumentsIn Stock: 1074CD74HCT240M96 Datasheet

MFR RecommendedRFQ

MM74HCT240WM

Fairchild SemiconductorIn Stock: 4430MM74HCT240WM Datasheet

DirectRFQ

74HCT02PW,118

NXP SemiconductorsIn Stock: 3199574HCT02PW,118 Datasheet

MFR RecommendedRFQ

74HCT240D,653

Nexperia USA Inc.In Stock: 385774HCT240D,653 Datasheet

MFR RecommendedRFQ

74HCT240D-Q100,118

NXP USA Inc.In Stock: 616474HCT240D-Q100,118 Datasheet

MFR RecommendedRFQ

MM74HCT240WMX

Fairchild SemiconductorIn Stock: 8221MM74HCT240WMX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT240M is determined by the following critical parameters:

Core Functional Parameters:

• Logic Type: Buffer, Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)

Acceptable Variation Parameters:

• Current - Output High, Low: Up to 7.2mA (original specifies 6mA)
• Operating Temperature: Minimum -40°C acceptable (original specifies -55°C minimum)
• Packaging Format: Tube, Tape & Reel (TR), or Bulk
• Product Status: Active preferred over Last Time Buy

Substitute parts must maintain identical functional specifications and package dimensions. Variations in output current and operating temperature range are acceptable provided they do not reduce system performance margins. Packaging format differences do not affect electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD74HCT240M96

CD74HCT240M96 is the manufacturer-recommended direct equivalent from Texas Instruments. It maintains identical electrical specifications including 6mA output current and -55°C to 125°C operating temperature range. The part is in Active product status, ensuring long-term availability. The only difference is packaging format (Tape & Reel versus Tube), which does not affect electrical performance. This part is preferred for new designs and ongoing production.

Secondary Recommendation: 74HCT240D,653

74HCT240D,653 from Nexperia USA Inc. provides full functional equivalence with identical output current (6mA) and extended upper operating temperature limit (-40°C to 125°C). This part is in Active status and available in Tape & Reel packaging. It is suitable for applications where the extended upper temperature range provides additional margin.

Tertiary Recommendation: 74HCT240D-Q100,118

74HCT240D-Q100,118 from NXP USA Inc. is qualified to AEC-Q100 automotive standards and maintains identical electrical specifications. This part is appropriate for automotive and mission-critical applications requiring automotive-grade qualification. Operating temperature range is -40°C to 125°C.

Alternative Consideration: MM74HCT240WM and MM74HCT240WMX

MM74HCT240WM and MM74HCT240WMX from Fairchild Semiconductor provide functional equivalence with higher output current capability (7.2mA versus 6mA). These parts are suitable for applications requiring increased drive capability. Operating temperature range is limited to -40°C to 85°C, which may not be acceptable for extended temperature applications. Both parts are in Active status.

Frequently Asked Questions (FAQ)

Q: Can I substitute CD74HCT240M with CD74HCT240M96?

A: Yes. CD74HCT240M96 is the manufacturer-recommended equivalent from Texas Instruments. Both parts share identical electrical specifications and 20-SOIC package dimensions. The difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance.

Q: What is the difference between the Fairchild parts (MM74HCT240WM and MM74HCT240WMX) and the original CD74HCT240M?

A: The Fairchild parts provide higher output current (7.2mA versus 6mA), which increases drive capability. However, they have a narrower operating temperature range (-40°C to 85°C versus -55°C to 125°C). These parts are suitable only for applications that do not require the extended low-temperature performance of the original part.

Q: Is the 74HCT02PW,118 a suitable substitute?

A: No. The 74HCT02PW,118 is a NOR gate IC with fundamentally different logic function. It is not functionally equivalent to the CD74HCT240M buffer inverter and cannot be used as a substitute.

Q: Can I use 74HCT240D-Q100,118 in non-automotive applications?

A: Yes. The 74HCT240D-Q100,118 is AEC-Q100 qualified, meaning it meets automotive standards. This qualification does not restrict its use in non-automotive applications. It is a valid substitute for any application using the CD74HCT240M.

Q: Does packaging format (Tube, Tape & Reel, Bulk) affect electrical compatibility?

A: No. Packaging format affects only procurement, handling, and assembly processes. All substitute parts in this list maintain identical electrical performance regardless of packaging format.

Q: Which substitute part should I choose for a new design?

A: CD74HCT240M96 is recommended for new designs. It is the manufacturer-recommended equivalent from Texas Instruments, maintains all original specifications, and is in Active product status, ensuring long-term availability and support.