74ABT2240CSJX Equivalent & Substitute Parts

Part Overview

The 74ABT2240CSJX is an inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This component operates across a 4.5V to 5.5V supply range and is housed in a 20-SOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT2240CSJX
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, Low	32mA, 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 74ABT2240CSJX 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
Operating Temperature: -40°C ~ 85°C (TA)
Series: 74ABT

Electrical Compatibility Parameters:

Current - Output High: 32mA (fixed requirement)
Current - Output Low: 12mA or 15mA (acceptable variance)

Physical Compatibility Parameters:

Mounting Type: Surface Mount
Package options: 20-SOIC or 20-SO (both compatible with 20-SOP footprint requirements)

Substitute parts are grouped into two categories based on base product number alignment:

Category 1: 74ABT2240 Base (Direct Functional Match) Parts maintaining identical element and bit configuration with active product status and modern compliance certifications.

Category 2: 74ABT240 Base (Functional Variant) Parts with identical logic architecture but different output current specifications (64mA low output current versus 15mA). These require application-level verification of current requirements.

Parameter Comparison

Parameter	74ABT2240CSJX (Main)	SN74ABT2240ADW	SN74ABT2240ADWR	SN74ABT2240ANSR	SN74ABT240ADW	SN74ABT240ADWR	SN74ABT240ANS	SN74ABT240ANSR
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
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	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
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)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)	20-SOIC (0.209", 5.30mm)
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 (74ABT2240 Series - Recommended)

SN74ABT2240ADWR and SN74ABT2240ADW represent the most direct functional equivalents to the 74ABT2240CSJX. Both are manufactured by Texas Instruments, maintain active product status, and comply with ROHS3 standards. The SN74ABT2240ADWR variant offers the highest inventory availability (5400 units) in tape and reel packaging, suitable for automated assembly processes. The SN74ABT2240ADW provides tube packaging for lower-volume applications. Both parts feature output low current of 12mA, which is within acceptable tolerance of the original 15mA specification.

SN74ABT2240ANSR provides an alternative with identical functional parameters and the same 0.209" package width as the original part, maintaining footprint compatibility. This variant is available in tape and reel format with 2040 units in stock.

Secondary Substitutes (74ABT240 Series - Application-Dependent)

SN74ABT240ADWR, SN74ABT240ADW, SN74ABT240ANS, and SN74ABT240ANSR are functionally compatible but feature increased output low current (64mA versus 15mA). These parts are suitable for applications where higher drive capability is beneficial or where the original current specification is not a limiting constraint. SN74ABT240ADWR offers the largest inventory (12575 units) and is available in cut tape and digi-reel packaging.

All substitute parts maintain identical supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 3-state output architecture. All Texas Instruments variants comply with ROHS3 and maintain MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT2240ADWR be used as a direct replacement for 74ABT2240CSJX?

A: Yes. Both parts share identical logic architecture (2-element, 4-bit inverting buffer with 3-state output), supply voltage range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). The output low current differs slightly (12mA versus 15mA), which is within acceptable tolerance for most applications. SN74ABT2240ADWR is active product status with ROHS3 compliance.

Q: What is the difference between 74ABT2240 and 74ABT240 series substitutes?

A: The primary difference is output low current specification. 74ABT2240 variants maintain 12mA output low current, closely matching the original 15mA. 74ABT240 variants provide 64mA output low current, offering higher drive capability. Both series are functionally equivalent in logic operation. Selection depends on application current requirements.

Q: Are package differences between 0.209" and 0.295" width significant?

A: Yes. The 0.209" width package (20-SOIC narrow body) matches the original 74ABT2240CSJX footprint. The 0.295" width package (20-SOIC wide body) requires PCB layout verification. SN74ABT2240ANSR and SN74ABT240ANSR maintain the narrow 0.209" width for direct footprint compatibility. SN74ABT2240ADW, SN74ABT2240ADWR, SN74ABT240ADW, and SN74ABT240ADWR use the wider 0.295" package.

Q: What packaging options are available for high-volume production?

A: Tape and reel (TR) packaging is recommended for automated assembly. SN74ABT2240ADWR (5400 units available) and SN74ABT240ADWR (12575 units available) are both available in tape and reel format. Cut tape and digi-reel options are also available for SN74ABT240ADWR.

Q: Are all substitute parts RoHS compliant?

A: All Texas Instruments substitute parts (SN74ABT2240 and SN74ABT240 series) comply with ROHS3 standards. The original onsemi 74ABT2240CSJX RoHS status is not specified in available documentation.

Q: What is the inventory status for these substitutes?

A: All substitute parts are listed as active product status with current inventory. SN74ABT240ADWR has the highest availability (12575 units), followed by SN74ABT2240ADWR (5400 units). Availability should be verified with suppliers for specific procurement timelines.

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