74AC241SC Equivalent & Substitute Parts

Part Overview

The 74AC241SC is a Buffer, Non-Inverting 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 2V to 6V supply voltage range with ±24mA output current capability. The part is currently classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the 74AC241SC is determined by strict alignment with the following electrical and mechanical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 24mA, 24mA
Voltage - Supply: 2V ~ 6V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 20-SOIC (0.295", 7.50mm Width)

Substitute parts are categorized as follows:

Parametric Equivalents share all electrical specifications and identical package dimensions. These parts are direct functional replacements.

Direct Manufacturer Variants are alternative packaging formats (Tape & Reel) of the same base part number from different manufacturers, maintaining full electrical and mechanical compatibility.

Similar Parts may include minor package variations (such as 20-SO vs. 20-SOIC width differences) but retain all core electrical parameters.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Voltage (V)	Temp Range (°C)	Package	Product Status
74AC241SC	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SOIC (0.295")	Obsolete
74AC244SC	Fairchild Semiconductor	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SOIC (0.295")	Active
MC74AC244DWG	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SOIC (0.295")	Active
SN74AC241DWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SOIC (0.295")	Active
SN74AC241NSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SO (0.209")	Active
SN74AC241DW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SOIC (0.295")	Last Time Buy
SN74AC244DW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	2 ~ 6	-40 ~ 85	20-SOIC (0.295")	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compatibility)

74AC244SC (Fairchild Semiconductor) and MC74AC244DWG (onsemi) are parametric equivalents with Active product status. Both maintain identical electrical specifications and 20-SOIC package dimensions. MC74AC244DWG carries RoHS3 compliance and MSL-3 moisture sensitivity rating.

SN74AC241DWR (Texas Instruments) is an Active direct variant of the 74AC241 base part number, supplied in Tape & Reel format. This part maintains full electrical and mechanical compatibility with identical 20-SOIC packaging.

Secondary Substitutes (Limited Availability)

SN74AC241DW (Texas Instruments) is classified as Last Time Buy, indicating limited future availability. Full electrical and mechanical compatibility is maintained.

SN74AC244DW (Texas Instruments) is Discontinued at DiGi Electronics, restricting procurement channels despite full parametric equivalence.

Package Variant Consideration

SN74AC241NSR (Texas Instruments) features a 20-SO package with reduced width (0.209" vs. 0.295"), suitable only for designs with flexible PCB layout requirements or existing 20-SO footprints.

Frequently Asked Questions (FAQ)

Q: Can 74AC244SC directly replace 74AC241SC?

A: Yes. Both parts share identical electrical specifications (2 elements, 4 bits per element, 3-state output, 24mA drive current, 2V–6V supply, -40°C to 85°C operating range) and 20-SOIC package dimensions. The primary difference is manufacturer (Fairchild vs. onsemi) and product status (Active vs. Obsolete).

Q: What is the difference between 74AC241 and 74AC244 base part numbers?

A: Within the 74AC logic family, both 74AC241 and 74AC244 are buffer configurations with identical electrical parameters specified in this reference. Substitution between these base numbers is valid when all other parameters align.

Q: Is SN74AC241NSR compatible with existing 74AC241SC PCB layouts?

A: SN74AC241NSR uses a 20-SO package (0.209" width) versus the 74AC241SC 20-SOIC package (0.295" width). PCB footprint compatibility depends on design layout. Verify footprint dimensions before substitution.

Q: Which substitute offers the best long-term availability?

A: MC74AC244DWG (onsemi) and 74AC244SC (Fairchild Semiconductor) both carry Active product status. MC74AC244DWG includes RoHS3 compliance certification, supporting regulatory requirements for new designs.

Q: Are there compliance differences between substitutes?

A: MC74AC244DWG carries RoHS3 compliance and MSL-3 moisture sensitivity. SN74AC241DWR and SN74AC241DW carry RoHS3 compliance and MSL-1 moisture sensitivity. 74AC244SC compliance information is limited to REACH Unaffected status. Verify specific compliance requirements for your application.

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