74ABT2240CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT2240CSCX is a logic buffer IC manufactured by onsemi, featuring inverting 2-element, 4-bit per element architecture with 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

74ABT2240CSCX

onsemiIn Stock: 94974ABT2240CSCX Datasheet

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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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SN74ABT240ADWR

Texas InstrumentsIn Stock: 12587SN74ABT240ADWR Datasheet

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SN74ABT240ANSR

Texas InstrumentsIn Stock: 16174SN74ABT240ANSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Logic Type: Buffer, Inverting (must match)
• Number of Elements: 2 (must match)
• Number of Bits per Element: 4 (must match)
• Output Type: 3-State (must match)
• Voltage - Supply: 4.5V ~ 5.5V (must match)
• Operating Temperature: -40°C ~ 85°C (must match)
• Mounting Type: Surface Mount (must match)
• Package / Case: 20-SOIC or 20-SO (compatible footprints)

Substitute parts are grouped into two categories based on package compatibility:

Category A - Direct Package Match (20-SOIC): SN74ABT2240ADW, SN74ABT2240ADWR, SN74ABT240ADW, SN74ABT240ADWR

Category B - Compatible Package Variant (20-SO): SN74ABT2240ANSR, SN74ABT240ANSR

Parameter Comparison

Engineering Selection Recommendations

All Texas Instruments substitute parts listed maintain active product status and ROHS3 compliance, providing long-term availability and environmental regulatory alignment. Selection between substitute options depends on specific application requirements:

For direct functional replacement with identical package footprint: SN74ABT2240ADW or SN74ABT2240ADWR are preferred, as they maintain the 74ABT2240 base product number and 20-SOIC package dimensions matching the original 74ABT2240CSCX.

For applications tolerating higher output low current: SN74ABT240ADW or SN74ABT240ADWR provide 64mA output low current versus the original 15mA specification, suitable for applications requiring increased drive capability.

For space-constrained designs: SN74ABT2240ANSR or SN74ABT240ANSR offer the narrower 20-SO package (0.209" width) as an alternative to the standard 20-SOIC footprint, provided PCB layout accommodates the package variant.

For production volume requirements: SN74ABT240ADWR and SN74ABT240ANSR offer the highest inventory availability in tape and reel packaging formats, supporting automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT240 series parts directly replace SN74ABT2240 series parts?

A: SN74ABT240 and SN74ABT2240 parts share identical logic type, element count, bit configuration, output type, voltage supply range, and operating temperature specifications. The primary difference is output low current: SN74ABT240 provides 64mA versus SN74ABT2240's 12mA to 15mA. Direct substitution is functionally valid when the higher output current does not create circuit design conflicts.

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

A: Both are 20-pin surface mount packages with identical pin configurations and electrical compatibility. The primary difference is package width: 20-SOIC measures 0.295" (7.50mm) while 20-SO measures 0.209" (5.30mm). PCB layout and footprint design determine package compatibility for a specific application.

Q: Are all substitute parts ROHS3 compliant?

A: All Texas Instruments substitute parts listed carry ROHS3 compliance certification. The original onsemi 74ABT2240CSCX RoHS status is not specified in available documentation.

Q: What packaging formats are available for production orders?

A: SN74ABT2240ADW and SN74ABT240ADW are supplied in tube packaging. SN74ABT2240ADWR, SN74ABT240ADWR, SN74ABT2240ANSR, and SN74ABT240ANSR are supplied in tape and reel or cut tape formats suitable for automated assembly.

Q: Does output current difference affect circuit compatibility?

A: Output current specifications define maximum drive capability. SN74ABT240 series parts with 64mA output low current provide higher drive capability than the original 15mA specification. Applications designed for the original 15mA specification will operate with SN74ABT240 substitutes. Applications requiring specific current limiting or impedance matching should evaluate whether increased drive capability affects signal integrity or power dissipation.