74LVC2244AD,112 Equivalent & Substitute Parts

Part Overview

The 74LVC2244AD,112 is a non-inverting buffer logic IC manufactured by Nexperia USA Inc., featuring 2 elements with 4 bits per element and 3-state output capability. This device operates across a supply voltage range of 1.2V to 3.6V and is housed in a 20-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC2244AD,112
Manufacturer	Nexperia USA Inc.
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	12mA, 12mA
Voltage - Supply	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVC2244AD,112 is determined by the following critical parameters:

Functional Equivalence: Logic type (Buffer, Non-Inverting), number of elements (2), bits per element (4), and output type (3-State) must remain identical.

Electrical Compatibility: Supply voltage range must encompass or match the original specification (1.2V ~ 3.6V). Output current capability (12mA minimum per channel) must be met or exceeded. Operating temperature range must support the application requirements.

Package Compatibility: The 20-SOIC package footprint is mandatory for direct PCB replacement without layout modifications.

Compliance Requirements: RoHS3 compliance is required for regulatory adherence. MSL rating of 1 (Unlimited) is preferred to match the original part's moisture handling characteristics.

Substitute parts are grouped into two categories: direct functional equivalents from the 74LVC series (same base architecture) and compatible alternatives from the 74LCX series (enhanced electrical performance with extended voltage or temperature ranges).

Parameter Comparison

Parameter	74LVC2244AD,112	SN74LVC2244ADWR	SN74LVC244ADW	CLVC244AQDWRG4Q1	MC74LCX244DWR2G	74LCX244WM
Manufacturer	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	onsemi
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2	2	2
Bits per Element	4	4	4	4	4	4
Output Type	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	12mA, 12mA	12mA, 12mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	1.2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	2V ~ 5.5V	2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Package / Case	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Primary Substitutes (74LVC Series - Direct Functional Match):

SN74LVC2244ADWR and SN74LVC2244ADW from Texas Instruments are the closest functional equivalents, maintaining the original 12mA output current specification and 74LVC2244 base architecture. Both are active products with ROHS3 compliance and MSL-1 rating. SN74LVC2244ADWR is packaged in Tape & Reel format, while SN74LVC2244ADW is supplied in Tube packaging. Operating temperature range is limited to -40°C ~ 85°C, which is narrower than the original part's -40°C ~ 125°C specification.

Secondary Substitutes (74LVC Series - Enhanced Performance):

SN74LVC244ADW and SN74LVC244ADWR from Texas Instruments provide enhanced output current capability (24mA vs. 12mA) while maintaining the full -40°C ~ 125°C operating temperature range. These parts are functionally compatible and support the same supply voltage range (1.65V ~ 3.6V). The increased output current provides design margin for applications requiring higher drive capability.

Automotive-Grade Alternative:

CLVC244AQDWRG4Q1 from Texas Instruments is an automotive-qualified variant (AEC-Q100) with 24mA output current and full -40°C ~ 125°C temperature range. This part is suitable for automotive and industrial applications requiring enhanced reliability certification.

Extended Voltage Range Alternatives (74LCX Series):

MC74LCX244DWR2G and MC74LCX244DWG from onsemi extend the supply voltage range to 2V ~ 5.5V, enabling use in systems with higher voltage rails. These parts deliver 24mA output current and support -55°C ~ 125°C operating temperature. The 74LCX series represents a different logic family with enhanced electrical performance but maintains functional compatibility.

74LCX244WM from onsemi provides 24mA output current within the 2V ~ 3.6V supply range and -40°C ~ 85°C operating temperature. This part is suitable for standard 3.3V logic applications.

Selection Criteria:

For direct replacement in existing designs, select SN74LVC2244ADWR or SN74LVC2244ADW to maintain electrical and thermal specifications. For applications requiring extended temperature operation, select SN74LVC244ADW or CLVC244AQDWRG4Q1. For systems with higher supply voltages or extended temperature extremes, select MC74LCX244DWR2G. All recommended substitutes are active products with current manufacturing support and full RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC244ADW as a direct replacement for 74LVC2244AD,112?

A: SN74LVC244ADW is functionally compatible and maintains the same logic architecture, package, and supply voltage range. However, it differs in output current (24mA vs. 12mA) and operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C for the 2244 variant). Verify that your application does not depend on the narrower temperature range of the 2244 series before substitution.

Q: What is the difference between 74LVC and 74LCX series buffers?

A: Both series provide non-inverting buffer functionality in identical 20-SOIC packages. The 74LVC series operates within 1.2V ~ 3.6V (or 1.65V ~ 3.6V depending on variant), while 74LCX series extends to 2V ~ 5.5V. The 74LCX series is suitable for applications requiring higher supply voltage compatibility. Output current specifications vary by specific part number within each series.

Q: Is MSL rating important for my application?

A: MSL (Moisture Sensitivity Level) rating indicates the component's sensitivity to moisture absorption during storage and handling. MSL-1 (Unlimited) parts like the original 74LVC2244AD,112 have no moisture-related storage restrictions. MSL-3 (168 Hours) parts require baking before reflow if storage exceeds 168 hours in standard humidity conditions. Select MSL-1 parts if your supply chain involves extended storage periods without controlled humidity.

Q: Can I substitute a 74LCX244 for a 74LVC2244 in a 1.2V application?

A: No. The 74LCX244 series minimum supply voltage is 2V, which exceeds the 1.2V lower limit of the original 74LVC2244AD,112. The 74LVC2244 series is required for applications operating below 2V. Verify your system's minimum supply voltage before selecting a substitute.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel packaging formats. All maintain the same 20-SOIC footprint. Select packaging based on your procurement and assembly process requirements. Tape & Reel format is standard for high-volume automated assembly.

Q: Are all recommended substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions. The original 74LVC2244AD,112 is also ROHS3 compliant.

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