74ABT244CSC Equivalent & Substitute Parts

Part Overview

The 74ABT244CSC is a non-inverting buffer logic integrated circuit manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74ABT244 series provides buffering functionality suitable for applications requiring signal isolation and drive capability in 5V logic systems. Substitute parts maintain electrical and mechanical compatibility while offering active product status from alternative manufacturers.

Key Parameters

Parameter	Specification
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)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on electrical and mechanical parameter alignment:

Direct Substitutes (Identical Electrical Parameters) Direct substitutes maintain all key electrical specifications: 2 elements, 4 bits per element, 3-state output, 32mA/64mA output current, 4.5V–5.5V supply voltage, and -40°C to 85°C operating temperature. These parts differ only in manufacturer, product status (active vs. obsolete), packaging format (tube, tape & reel), or RoHS compliance status. Package dimensions remain 20-SOIC (0.295", 7.50mm Width).

Similar Substitutes (Package Variant) Similar substitutes maintain all electrical specifications but use alternative package designations (20-SO vs. 20-SOIC). The 20-SO package (0.209", 5.30mm Width) represents a narrower variant of the same SOIC family. These parts are functionally equivalent but require PCB layout verification for pin-to-pad alignment.

Parametric Equivalents (Different Base Product Number) Parametric equivalents belong to the 74ABT241 series rather than 74ABT244. While maintaining identical electrical specifications (2 elements, 4 bits per element, 3-state output, 32mA/64mA current, supply voltage, and temperature range), the base product number differs. These parts are functionally compatible but represent a different logic configuration and should be selected only when 74ABT244-specific functionality is not required.

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Elements / Bits	Output Type	Current (High/Low)	Supply Voltage	Temp Range	Package	RoHS Status
74ABT244CSC	onsemi	Obsolete	Buffer, Non-Inverting	2 / 4	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Not Specified
SN74ABT244ADW	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	ROHS3 Compliant
SN74ABT244ADWR	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	ROHS3 Compliant
74ABT244D,623	Nexperia USA Inc.	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO (0.295")	ROHS3 Compliant
SN74ABT244ANSR	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO (0.209")	ROHS3 Compliant
SN74ABT2244ADW	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	ROHS3 Compliant
SN74ABT2244ADWR	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	ROHS3 Compliant
SN74ABT2244ANS	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO (0.209")	ROHS3 Compliant
SN74ABT2244ANSR	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO (0.209")	ROHS3 Compliant
SN74ABT241ADW	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications) Select SN74ABT244ADW or SN74ABT244ADWR from Texas Instruments. Both maintain 32mA/64mA output current specifications and 20-SOIC (0.295", 7.50mm Width) package dimensions. Both are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

For Package-Variant Applications The 74ABT244D,623 (Nexperia) and SN74ABT244ANSR (Texas Instruments) provide equivalent electrical performance with 20-SO package variants. The Nexperia part uses standard 0.295" width; the Texas Instruments part uses narrower 0.209" width. PCB layout verification is required to confirm pin-to-pad compatibility before selection.

For Output Current Derating Applications The SN74ABT2244 series (ADW, ADWR, ANS, ANSR variants) reduces output low current from 64mA to 12mA while maintaining 32mA output high current. These parts are suitable only when reduced sink current meets application requirements. All variants are ROHS3 compliant and active.

For Parametric Equivalence The SN74ABT241ADW provides identical electrical specifications (2 elements, 4 bits, 3-state output, 32mA/64mA current) with active status and ROHS3 compliance. Selection requires confirmation that 74ABT241 logic configuration meets functional requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT244ADW directly replace 74ABT244CSC without PCB modification? A: Yes. SN74ABT244ADW maintains identical electrical specifications and 20-SOIC (0.295", 7.50mm Width) package dimensions. No PCB layout changes are required.

Q: What is the difference between 20-SOIC and 20-SO packages? A: Both are surface-mount packages with 20 pins. The primary difference is package width: 20-SOIC (0.295", 7.50mm) is standard width, while 20-SO (0.209", 5.30mm) is narrower. Pin pitch and electrical specifications remain identical. PCB footprint verification is required before substituting between variants.

Q: Why do SN74ABT2244 parts show different output current specifications? A: SN74ABT2244 variants reduce output low current from 64mA to 12mA. This represents a different product variant within the 74ABT buffer family. Selection depends on whether your application can operate with reduced sink current capability.

Q: Is ROHS3 compliance required for my application? A: ROHS3 compliance is mandatory for products sold in the European Union and many other regions. All active substitute parts listed are ROHS3 compliant. The original 74ABT244CSC (obsolete) does not specify RoHS status.

Q: What is the difference between tube and tape & reel packaging? A: Tube packaging is suitable for manual assembly and small-volume production. Tape & reel packaging is optimized for automated pick-and-place assembly. Electrical specifications and component performance are identical; packaging choice depends on assembly process requirements.

Q: Can I use SN74ABT241ADW as a substitute for 74ABT244CSC? A: SN74ABT241ADW maintains identical electrical specifications and package dimensions. However, the base product number differs (74ABT241 vs. 74ABT244), indicating different internal logic configuration. Substitution is valid only if your circuit does not depend on 74ABT244-specific functionality.

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