74ABT244CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT244CSCX is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. Housed in a 20-SOIC package, this component operates across a 4.5V to 5.5V supply voltage range with output drive capabilities of 32mA high and 64mA low. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT244CSCX
Manufacturer	onsemi
Series	74ABT
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT244CSCX is determined by strict adherence to the following parameters:

Critical Matching Parameters:

Logic Type: Buffer, Non-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)
Current - Output High, Low: 32mA, 64mA
Mounting Type: Surface Mount
Series: 74ABT

Package Considerations: Substitutes are grouped into two categories based on package specifications:

20-SOIC (0.295", 7.50mm Width): Direct mechanical and electrical equivalents
20-SO (0.209", 5.30mm Width): Narrower package variant with identical electrical specifications

Parts meeting all critical electrical parameters are classified as direct substitutes regardless of packaging variant, provided the physical dimensions are compatible with the application's PCB layout.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current High/Low (mA)	Voltage Supply	Temp Range	Package	Status	RoHS
74ABT244CSCX	onsemi	Buffer, Non-Inverting	2	4	3-State	32/64	4.5-5.5V	-40 to 85°C	20-SOIC (7.50mm)	Obsolete	N/A
SN74ABT244ADW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/64	4.5-5.5V	-40 to 85°C	20-SOIC (7.50mm)	Active	ROHS3
SN74ABT244ADWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/64	4.5-5.5V	-40 to 85°C	20-SOIC (7.50mm)	Active	ROHS3
SN74ABT244ANSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/64	4.5-5.5V	-40 to 85°C	20-SO (5.30mm)	Active	ROHS3
SN74ABT241ADWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/64	4.5-5.5V	-40 to 85°C	20-SOIC (7.50mm)	Active	ROHS3
74ABT244D,623	Nexperia USA Inc.	Buffer, Non-Inverting	2	4	3-State	32/64	4.5-5.5V	-40 to 85°C	20-SO (7.50mm)	Active	ROHS3
SN74ABT2244ADW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/12	4.5-5.5V	-40 to 85°C	20-SOIC (7.50mm)	Active	ROHS3
SN74ABT2244ADWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/12	4.5-5.5V	-40 to 85°C	20-SOIC (7.50mm)	Active	ROHS3
SN74ABT2244ANS	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/12	4.5-5.5V	-40 to 85°C	20-SO (5.30mm)	Active	ROHS3
SN74ABT2244ANSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32/12	4.5-5.5V	-40 to 85°C	20-SO (5.30mm)	Active	ROHS3

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes):

Parts matching all electrical parameters including output current specifications (32mA high, 64mA low) are:

SN74ABT244ADW (Texas Instruments, Tube packaging)
SN74ABT244ADWR (Texas Instruments, Tape & Reel packaging)
SN74ABT244ANSR (Texas Instruments, 20-SO package variant)
74ABT244D,623 (Nexperia USA Inc., Tape & Reel packaging)
SN74ABT241ADWR (Texas Instruments, alternative base product number)

All recommended substitutes carry Active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

Secondary Alternatives (Reduced Output Current):

Parts designated as SN74ABT2244 variants feature reduced output low current (12mA versus 64mA). These are suitable only when application circuit design accommodates lower sink current capability:

SN74ABT2244ADW
SN74ABT2244ADWR
SN74ABT2244ANS
SN74ABT2244ANSR

Packaging Selection:

For PCB layouts requiring the standard 20-SOIC (0.295", 7.50mm width) footprint, select from SN74ABT244ADW, SN74ABT244ADWR, or SN74ABT241ADWR. For applications compatible with the narrower 20-SO (0.209", 5.30mm width) package, SN74ABT244ANSR and 74ABT244D,623 provide equivalent electrical performance with reduced board space requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT2244 series parts directly replace the 74ABT244CSCX?

A: SN74ABT2244 variants are not direct electrical equivalents. While they maintain identical logic configuration, element count, and bit width, the output low current is specified at 12mA compared to the 64mA requirement of the 74ABT244CSCX. Substitution is permissible only if circuit design analysis confirms adequate performance with reduced sink current capability.

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

A: Both packages contain 20 pins with identical pin assignments and electrical function. The primary distinction is physical width: 20-SOIC measures 0.295 inches (7.50mm) while 20-SO measures 0.209 inches (5.30mm). Package selection depends on PCB layout constraints and available footprint space. Electrical performance is identical between variants.

Q: Why is the 74ABT244CSCX classified as obsolete?

A: Obsolete status indicates the original manufacturer (onsemi) has discontinued production. Active equivalent alternatives from Texas Instruments and Nexperia USA Inc. provide identical or superior electrical specifications with confirmed long-term availability and regulatory compliance.

Q: Are all recommended substitutes ROHS3 compliant?

A: All active substitute parts listed carry ROHS3 compliance certification. The original 74ABT244CSCX does not specify RoHS status due to its obsolete classification. Substitution with ROHS3-compliant alternatives ensures regulatory alignment for new designs and production.

Q: What packaging options are available for the SN74ABT244 series?

A: Texas Instruments supplies SN74ABT244 in two packaging formats: Tube (ADW variant) and Tape & Reel (ADWR variant). Both contain identical die and electrical specifications. Packaging selection is determined by production volume requirements and inventory management protocols.

Q: Can SN74ABT241ADWR substitute for 74ABT244CSCX despite different base product numbers?

A: Yes. SN74ABT241ADWR meets all critical electrical parameters: 2 elements, 4 bits per element, 3-state output, 32mA/64mA current specifications, and identical voltage and temperature ranges. The base product number difference reflects internal architecture variations that do not affect functional equivalence for this application.

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