74LVC244AD,112 Equivalent & Substitute Parts

Part Overview

The 74LVC244AD,112 is a non-inverting buffer IC manufactured by Nexperia USA Inc., featuring 2 elements with 4 bits per element and 3-state output capability. Designed for low-voltage CMOS logic applications, this component operates across a 1.2V to 3.6V supply range with 24mA output drive capability. The part is currently classified as obsolete, making identification of functionally equivalent substitutes essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC244AD,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	24mA, 24mA
Voltage - Supply	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVC244AD,112 is determined by the following critical parameters:

Primary Matching Criteria:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Output Current: 24mA minimum (High and Low)

Secondary Compatibility Factors:

Voltage Supply Range: Must encompass or overlap with 1.2V ~ 3.6V
Operating Temperature Range: Must support -40°C ~ 125°C minimum
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on functional equivalence and active product status. Category 1 includes direct functional equivalents with identical or superior electrical specifications and active manufacturing status. Category 2 includes parts with compatible logic function but reduced output current or narrower operating temperature ranges, suitable for applications with relaxed performance requirements.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Current (mA)	Voltage Supply (V)	Temp Range (°C)	Package	Status
74LVC244AD,112	Nexperia USA Inc.	Buffer, Non-Inverting	2	4	24, 24	1.2 ~ 3.6	-40 ~ 125	20-SOIC	Obsolete
SN74LVC244ADW	Texas Instruments	Buffer, Non-Inverting	2	4	24, 24	1.65 ~ 3.6	-40 ~ 125	20-SOIC	Active
SN74LVC2244ADWR	Texas Instruments	Buffer, Non-Inverting	2	4	12, 12	1.65 ~ 3.6	-40 ~ 85	20-SOIC	Active
CLVC244AQDWRG4Q1	Texas Instruments	Buffer, Non-Inverting	2	4	24, 24	1.65 ~ 3.6	-40 ~ 125	20-SOIC	Active
74LCX244WM	onsemi	Buffer, Non-Inverting	2	4	24, 24	2.0 ~ 3.6	-40 ~ 85	20-SOIC	Active
74LCX244WMX	Fairchild Semiconductor	Buffer, Non-Inverting	2	4	24, 24	2.0 ~ 3.6	-40 ~ 85	20-SOIC	Active
MC74LCX244DWR2G	onsemi	Buffer, Non-Inverting	2	4	24, 24	2.0 ~ 5.5	-55 ~ 125	20-SOIC	Active
MC74LVX244DWR2G	onsemi	Buffer, Non-Inverting	2	4	4, 4	2.0 ~ 3.6	-40 ~ 85	20-SOIC	Active

Engineering Selection Recommendations

Tier 1 - Direct Functional Equivalents (Recommended Primary Substitutes):

SN74LVC244ADW (Texas Instruments) provides the closest functional match with identical 24mA output current, matching operating temperature range (-40°C ~ 125°C), and active product status. Supply voltage range of 1.65V ~ 3.6V encompasses the original specification. ROHS3 compliance and unlimited moisture sensitivity level ensure compatibility with existing manufacturing processes.

CLVC244AQDWRG4Q1 (Texas Instruments) offers identical electrical performance with automotive-grade qualification (AEC-Q100) and active status. This variant is suitable for applications requiring automotive-level reliability and traceability.

Tier 2 - Compatible Substitutes with Performance Trade-offs:

MC74LCX244DWR2G (onsemi) extends the supply voltage range to 5.5V and operating temperature to -55°C, providing broader environmental tolerance. The 24mA output current matches the original specification. This part is suitable for applications requiring extended temperature or voltage operating margins.

74LCX244WM and 74LCX244WMX maintain 24mA output current and 20-SOIC packaging but operate within 2.0V ~ 3.6V supply range and -40°C ~ 85°C temperature range. These parts are appropriate for applications not requiring the full 1.2V lower supply limit or 125°C upper temperature operation.

Not Recommended:

SN74LVC2244ADWR exhibits reduced output current (12mA vs. 24mA) and narrower operating temperature range (-40°C ~ 85°C). This part is unsuitable for applications requiring the original 24mA drive capability or full temperature range.

MC74LVX244DWR2G provides only 4mA output current, insufficient for applications requiring 24mA drive capability.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC244ADW directly replace the 74LVC244AD,112 in existing designs?

A: Yes. SN74LVC244ADW maintains identical logic function, output current (24mA), operating temperature range (-40°C ~ 125°C), and 20-SOIC package. The supply voltage range (1.65V ~ 3.6V) encompasses the original 1.2V ~ 3.6V specification. No design modifications are required.

Q: What is the difference between 74LVC244 and 74LVC2244 variants?

A: The 74LVC2244 is a reduced-drive variant with 12mA output current compared to 24mA in the 74LVC244. The 74LVC2244 also operates within a narrower temperature range (-40°C ~ 85°C). Selection depends on whether the application requires full 24mA drive capability.

Q: Are onsemi 74LCX244 parts compatible with the original Nexperia 74LVC244AD,112?

A: 74LCX244 variants maintain identical logic function, element count, bit configuration, and 20-SOIC packaging. However, the supply voltage minimum is 2.0V (vs. 1.2V in the original), and operating temperature range is limited to -40°C ~ 85°C. These parts are compatible for applications operating within these constraints.

Q: What does the automotive-grade CLVC244AQDWRG4Q1 offer compared to standard 74LVC244 parts?

A: CLVC244AQDWRG4Q1 carries AEC-Q100 automotive qualification, providing enhanced traceability and reliability assurance for automotive applications. Electrical specifications match SN74LVC244ADW, with identical 24mA output current and -40°C ~ 125°C operating range.

Q: Can MC74LCX244DWR2G be used in applications requiring 1.2V minimum supply voltage?

A: No. MC74LCX244DWR2G operates with a 2.0V minimum supply voltage. Applications requiring 1.2V operation must use parts with lower supply voltage minimums, such as SN74LVC244ADW (1.65V minimum) or the original 74LVC244AD,112 (1.2V minimum).

Q: Why is output current a critical selection parameter?

A: Output current determines the maximum load-driving capability. The original 74LVC244AD,112 provides 24mA. Parts with reduced output current (such as 12mA or 4mA variants) cannot reliably drive equivalent loads. Applications must verify that substitute parts provide sufficient current for connected logic or interface circuits.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed carry ROHS3 compliance, ensuring compatibility with modern manufacturing and environmental regulations. Moisture sensitivity levels vary; most maintain MSL 1 (unlimited) or MSL 3 (168 hours), consistent with the original specification.

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