74ABT2240CSJ Equivalent & Substitute Parts

Part Overview

The 74ABT2240CSJ 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 across a 4.5V to 5.5V supply range and is rated for -40°C to 85°C operating temperature. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT2240CSJ
Manufacturer	onsemi
Series	74ABT
Logic Type	Buffer, Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High	32mA
Current - Output Low	15mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT2240CSJ is determined by the following critical parameters:

Functional Equivalence Requirements:

Logic Type: Buffer, Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)

Package Compatibility Considerations:

Primary substitute group: 20-SOIC (0.295", 7.50mm Width) - mechanically compatible with footprint adaptation
Secondary substitute group: 20-SO (0.209", 5.30mm Width) - direct footprint match

Output Current Specifications: The 74ABT2240CSJ specifies 32mA output high and 15mA output low. Substitute parts with equal or higher output current ratings maintain functional compatibility. Parts with 32mA/12mA or 32mA/64mA ratings are electrically suitable for applications within the original design envelope.

Base Product Number Variants: The 74ABT2240 base product number encompasses both 2-element and single-element buffer configurations. Parts designated as 74ABT240 represent single-element variants and are included as extended substitutes where application requirements permit functional adaptation.

Parameter Comparison

Parameter	74ABT2240CSJ (Main)	SN74ABT2240ADW	SN74ABT2240ADWR	SN74ABT2240ANSR	SN74ABT240ADW	SN74ABT240ADWR	SN74ABT240ANS	SN74ABT240ANSR
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Series	74ABT	74ABT	74ABT	74ABT	74ABT	74ABT	74ABT	74ABT
Logic Type	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting
Number of Elements	2	2	2	2	2	2	2	2
Number of Bits per Element	4	4	4	4	4	4	4	4
Output Type	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	32mA, 15mA	32mA, 12mA	32mA, 12mA	32mA, 12mA	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Direct Functional Equivalents):

SN74ABT2240ANSR and SN74ABT2240ADW are the preferred substitutes for the 74ABT2240CSJ. Both parts maintain identical functional specifications including 2-element, 4-bit architecture with 3-state output. SN74ABT2240ANSR is supplied in Tape & Reel packaging with 2040 units in stock, while SN74ABT2240ADW is supplied in Tube packaging with 1305 units available. Both are manufactured by Texas Instruments with Active product status and ROHS3 compliance.

SN74ABT2240ADWR provides the same functional specification in Tape & Reel format with significantly higher inventory availability (5400 units), making it suitable for high-volume procurement requirements.

Secondary Substitutes (Extended Compatibility):

SN74ABT240ADW, SN74ABT240ADWR, SN74ABT240ANS, and SN74ABT240ANSR represent the single-element 74ABT240 variant. These parts maintain identical electrical specifications and operating parameters but feature a different base product number. Selection of these parts requires design verification to confirm that single-element buffer functionality meets application requirements.

Compliance and Availability:

All Texas Instruments substitutes carry Active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. The 74ABT2240CSJ's obsolete status necessitates transition to one of these active alternatives for new designs and ongoing production support.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT240 series parts directly replace the 74ABT2240CSJ?

A: SN74ABT240 parts are functionally compatible within the 74ABT logic family and maintain identical electrical specifications. However, the base product number difference indicates a single-element configuration versus the 2-element architecture of the 74ABT2240. Design verification is required to confirm that application requirements are met by the single-element variant.

Q: What is the difference between the 20-SOIC (0.209", 5.30mm Width) and 20-SOIC (0.295", 7.50mm Width) packages?

A: Both are 20-pin SOIC packages but differ in body width. The 0.209" width package matches the original 74ABT2240CSJ footprint. The 0.295" width package requires PCB footprint adaptation. SN74ABT2240ANSR maintains the original 0.209" width for direct footprint compatibility, while SN74ABT2240ADW and SN74ABT2240ADWR use the wider 0.295" package.

Q: Are there output current differences between substitute options?

A: Yes. The 74ABT2240CSJ specifies 32mA output high and 15mA output low. SN74ABT2240 variants specify 32mA/12mA, while SN74ABT240 variants specify 32mA/64mA. All ratings are electrically compatible for standard logic applications within the original design envelope.

Q: What packaging formats are available for the SN74ABT2240 substitutes?

A: SN74ABT2240ADW is supplied in Tube packaging. SN74ABT2240ADWR is supplied in Tape & Reel (TR) format. SN74ABT2240ANSR is supplied in Tape & Reel (TR) format. Packaging selection depends on procurement volume and assembly process requirements.

Q: Are all substitutes ROHS3 compliant?

A: All Texas Instruments substitutes listed carry ROHS3 compliance certification. The original 74ABT2240CSJ does not specify RoHS status. Substitution with ROHS3-compliant parts ensures regulatory alignment for new designs and production transitions.

Q: What is the inventory status for these substitutes?

A: SN74ABT2240ADWR has the highest availability with 5400 units in stock. SN74ABT2240ADW has 1305 units available. SN74ABT2240ANSR has 2040 units available. SN74ABT240ADWR has 12575 units in stock. Inventory levels support both prototype and production-volume requirements.

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