74ABT240CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT240CSCX is an inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. Designed for 4.5V to 5.5V supply operation, this component is classified as obsolete. Due to its obsolete status, identifying active equivalent and substitute parts is essential for design continuity and procurement reliability.

Substiute Parts

74ABT240CSCX

onsemiIn Stock: 82474ABT240CSCX Datasheet

Current PartRFQ

SN74ABT2240ADW

Texas InstrumentsIn Stock: 1364SN74ABT2240ADW Datasheet

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SN74ABT2240ADWR

Texas InstrumentsIn Stock: 5443SN74ABT2240ADWR Datasheet

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SN74ABT2240ANSR

Texas InstrumentsIn Stock: 2099SN74ABT2240ANSR Datasheet

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SN74ABT240ADW

Texas InstrumentsIn Stock: 2540SN74ABT240ADW Datasheet

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SN74ABT240ANSR

Texas InstrumentsIn Stock: 16174SN74ABT240ANSR Datasheet

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SN74ABT240ADWR

Texas InstrumentsIn Stock: 12587SN74ABT240ADWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ABT240CSCX is determined by the following critical parameters:

• Logic Function: Buffer, Inverting with 2 elements and 4 bits per element
• Output Configuration: 3-State output capability
• Electrical Specifications: 4.5V to 5.5V supply voltage, -40°C to 85°C operating temperature range
• Output Current Ratings: 32mA high, 64mA low (primary specification)
• Package Type: 20-SOIC form factor with 0.295" (7.50mm) width

Substitute parts are grouped into two categories:

Group 1 - Direct Parametric Equivalents (74ABT240 Base): Parts maintaining identical output current specifications (32mA, 64mA) with the same 20-SOIC package footprint. These include SN74ABT240ADW and SN74ABT240ADWR from Texas Instruments.

Group 2 - Functional Equivalents with Modified Output Current (74ABT2240 Base): Parts with identical logic function and package but reduced output current low specification (32mA, 12mA). These include SN74ABT2240ADW and SN74ABT2240ADWR from Texas Instruments.

Group 3 - Package Variant (20-SO): SN74ABT240ANSR and SN74ABT2240ANSR feature a narrower 20-SO package (0.209", 5.30mm width) while maintaining electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Output Current Specifications)

SN74ABT240ADW and SN74ABT240ADWR are the primary substitutes, maintaining 32mA high and 64mA low output current specifications identical to the 74ABT240CSCX. Both are manufactured by Texas Instruments with active product status and ROHS3 compliance. SN74ABT240ADWR is packaged in Cut Tape and Digi-Reel format with 12,575 units in stock, while SN74ABT240ADW is supplied in Tube packaging with 2,470 units available.

For Reduced Output Current Applications

SN74ABT2240ADW and SN74ABT2240ADWR provide functional equivalence with reduced output current low specification (12mA instead of 64mA). These parts are suitable for applications where lower output current is acceptable. SN74ABT2240ADWR offers the highest inventory availability at 5,400 units in Tape & Reel packaging.

For Package Footprint Optimization

SN74ABT240ANSR and SN74ABT2240ANSR feature the narrower 20-SO package (0.209", 5.30mm width) compared to the standard 20-SOIC (0.295", 7.50mm width). These variants are applicable when PCB space constraints require a reduced footprint. SN74ABT240ANSR maintains identical output current specifications with 16,100 units in stock.

All substitute parts from Texas Instruments carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT2240 series parts directly replace the 74ABT240CSCX?

A: SN74ABT2240 parts are functionally equivalent but feature reduced output current low specification (12mA versus 64mA). Direct replacement is possible only if the application circuit does not require the higher 64mA output current. Verify load requirements before substitution.

Q: What is the difference between 20-SOIC and 20-SO packages?

A: The 20-SOIC package measures 0.295" (7.50mm) in width, while the 20-SO package measures 0.209" (5.30mm) in width. Both are surface-mount packages with identical pin counts and electrical compatibility. The narrower 20-SO variant is used when PCB space is limited. Verify PCB footprint compatibility before selecting the package variant.

Q: Are all substitute parts RoHS compliant?

A: All Texas Instruments substitute parts listed are ROHS3 compliant. The original onsemi 74ABT240CSCX RoHS status is not specified in the available data.

Q: What packaging options are available for the SN74ABT240ADWR?

A: SN74ABT240ADWR is supplied in Cut Tape and Digi-Reel packaging format with 12,575 units in stock. Alternative packaging options include Tube (SN74ABT240ADW) and Tape & Reel (SN74ABT240ANSR in 20-SO package).

Q: Which substitute part offers the highest inventory availability?

A: SN74ABT240ANSR provides the highest inventory with 16,100 units in stock, followed by SN74ABT240ADWR with 12,575 units. Both are active products from Texas Instruments.

Q: Are the operating temperature ranges identical across all substitute parts?

A: All parts, including the main component and substitutes, operate across the -40°C to 85°C temperature range. No thermal performance differences exist between the listed alternatives.