CD74HCT240PWT Equivalent & Substitute Parts

Part Overview

The CD74HCT240PWT 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-TSSOP surface mount device operates across a 4.5V to 5.5V supply range and is rated for -55°C to 125°C operating temperature. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substiute Parts

CD74HCT240PWT

Texas InstrumentsIn Stock: 1575CD74HCT240PWT Datasheet

Current PartRFQ

CD74HCT240PWR

Texas InstrumentsIn Stock: 951CD74HCT240PWR Datasheet

Parametric EquivalentRFQ

74HCT240PW,118

NXP USA Inc.In Stock: 313474HCT240PW,118 Datasheet

MFR RecommendedRFQ

74HCT240PW-Q100,11

Nexperia USA Inc.In Stock: 114374HCT240PW-Q100,11 Datasheet

MFR RecommendedRFQ

MM74HCT240MTCX

Fairchild SemiconductorIn Stock: 6770MM74HCT240MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT240PWT 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), Voltage Supply Range (4.5V ~ 5.5V), Package Type (20-TSSOP), and Mounting Type (Surface Mount). All identified substitute parts maintain these core electrical and mechanical specifications. Output current ratings and operating temperature ranges may vary within acceptable limits for the 74HCT240 product family, provided the substitute meets or exceeds the minimum requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT240PWR is the primary parametric equivalent, manufactured by Texas Instruments with identical electrical specifications and Active product status. This part maintains full compatibility with the original CD74HCT240PWT design while offering improved long-term availability.

74HCT240PW,118 (NXP USA Inc.) and 74HCT240PW-Q100,11 (Nexperia USA Inc.) are Active alternatives with equivalent core functionality. The NXP variant is available in Bulk packaging, while the Nexperia variant includes AEC-Q100 automotive qualification and ROHS3 compliance certification, suitable for applications requiring automotive-grade components.

MM74HCT240MTCX (Fairchild Semiconductor) provides functional equivalence with higher output current capability (7.2mA versus 6mA) and Active status. This part operates within a narrower temperature range (-40°C to 85°C) compared to the original specification, requiring thermal environment verification before selection.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT240PWR directly replace CD74HCT240PWT in existing designs? A: Yes. CD74HCT240PWR maintains identical electrical parameters, package type, and mounting specifications. The primary difference is product status transition from Last Time Buy to Active, ensuring continued availability.

Q: What is the difference between Tape & Reel and Bulk packaging options? A: Tape & Reel packaging is suitable for automated assembly processes and provides moisture protection during storage and handling. Bulk packaging is typically used for manual assembly or lower-volume applications. Both packaging types contain identical components.

Q: Is the 74HCT240PW-Q100,11 suitable for non-automotive applications? A: Yes. AEC-Q100 qualification exceeds standard commercial requirements and provides additional reliability assurance. This part is fully compatible with non-automotive designs.

Q: Why does MM74HCT240MTCX have higher output current ratings? A: The Fairchild variant specifies 7.2mA output current versus 6mA for other variants. This represents a manufacturing characteristic difference within the 74HCT240 product family. Designs rated for 6mA operation are compatible with this higher-current variant.

Q: What is the impact of the narrower operating temperature range in MM74HCT240MTCX? A: The Fairchild part operates from -40°C to 85°C, compared to -55°C to 125°C for the original. Verify that your application's thermal environment falls within this range before selection.

Q: Are all substitute parts ROHS3 compliant? A: CD74HCT240PWT, CD74HCT240PWR, and 74HCT240PW-Q100,11 are explicitly ROHS3 compliant. Compliance status for 74HCT240PW,118 and MM74HCT240MTCX was not provided in the specification data.