74LVC2244ADB,112 Equivalent & Substitute Parts

Part Overview

The 74LVC2244ADB,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. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement continuity. The 74LVC series provides low-voltage CMOS logic buffering suitable for applications requiring signal isolation and drive capability across 1.2V to 3.6V supply ranges.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC2244ADB,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-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74LVC2244ADB,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 constant across all substitutes.

Electrical Compatibility: Supply voltage range, output current capability, and operating temperature range define the operational envelope. The original part operates from 1.2V to 3.6V; substitutes must support the application's actual supply voltage.

Package Compatibility: The original 20-SSOP package (5.30mm width) can be substituted with equivalent or compatible packages (20-TSSOP, 20-TVSOP) provided PCB layout accommodates the physical dimensions.

Product Status: Active substitutes ensure long-term availability and manufacturing support, whereas the obsolete status of the original part creates procurement risk.

Substitute parts are grouped into two categories:

Same Package (20-SSOP): SN74LVC2244ADBQR, SN74LVC2244ADBR — direct footprint compatibility
Alternative Packages (20-TSSOP, 20-TVSOP): 74LCX2244MTCX, 74LCX244MTC, 74LCX244MTCX, CLVC244AQPWRG4Q1, SN74LVC2244ADGVR, SN74LVC2244APW, SN74LVC2244APWR, SN74LVC2244APWT — functional equivalence with package variation

Parameter Comparison

Part Number	Manufacturer	Logic Type	Output Current (mA)	Supply Voltage (V)	Temp Range (°C)	Package	Product Status
74LVC2244ADB,112	Nexperia USA Inc.	Buffer, Non-Inverting	12, 12	1.2 ~ 3.6	-40 ~ 125	20-SSOP	Obsolete
SN74LVC2244ADBR	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65 ~ 3.6	-40 ~ 85	20-SSOP	Active
SN74LVC2244ADBQR	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65 ~ 3.6	-40 ~ 85	20-SSOP	Active
74LCX2244MTCX	Fairchild Semiconductor	Buffer, Non-Inverting	12, 12	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74LCX244MTC	onsemi	Buffer, Non-Inverting	24, 24	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74LCX244MTCX	onsemi	Buffer, Non-Inverting	24, 24	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
CLVC244AQPWRG4Q1	Texas Instruments	Buffer, Non-Inverting	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Active
SN74LVC2244ADGVR	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65 ~ 3.6	-40 ~ 85	20-TVSOP	Active
SN74LVC2244APW	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65 ~ 3.6	-40 ~ 85	20-TSSOP	Active
SN74LVC2244APWR	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65 ~ 3.6	-40 ~ 85	20-TSSOP	Active
SN74LVC2244APWT	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65 ~ 3.6	-40 ~ 85	20-TSSOP	Active

Engineering Selection Recommendations

Direct Package Replacement (Recommended for Minimal Redesign):

SN74LVC2244ADBR and SN74LVC2244ADBQR maintain the 20-SSOP package footprint, enabling direct PCB substitution without layout modification. Both are manufactured by Texas Instruments and carry active product status with ROHS3 compliance. The supply voltage range narrows from 1.2V–3.6V to 1.65V–3.6V; applications operating below 1.65V require alternative selection. Operating temperature range reduces to -40°C–85°C, suitable for commercial and industrial environments.

Alternative Package Options (For New Designs or Layout Flexibility):

SN74LVC2244APW, SN74LVC2244APWR, and SN74LVC2244APWT provide 20-TSSOP packaging with identical electrical specifications to the SSOP variants. These parts accommodate applications where package footprint flexibility exists. CLVC244AQPWRG4Q1 extends the operating temperature to -40°C–125°C and increases output current to 24mA, suitable for automotive-grade applications requiring AEC-Q100 qualification.

Higher Output Current Variants:

74LCX244MTC and 74LCX244MTCX (onsemi) and 74LCX2244MTCX (Fairchild) deliver 24mA output current versus the original 12mA specification. These parts are appropriate for applications requiring increased drive capability. Supply voltage minimum rises to 2.0V, restricting use in sub-2V systems.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard manufacturing and storage protocols. Active product status across all substitutes guarantees procurement availability and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC2244ADBR as a direct replacement for 74LVC2244ADB,112?

A: Yes, for applications operating within 1.65V–3.6V supply range and -40°C–85°C temperature limits. The 20-SSOP package is identical, requiring no PCB layout changes. The original part's 1.2V minimum supply voltage is not supported; applications requiring sub-1.65V operation require alternative selection.

Q: What is the difference between 20-SSOP and 20-TSSOP packages?

A: Both are 20-pin surface-mount packages with different body widths. 20-SSOP measures 5.30mm width; 20-TSSOP measures 4.40mm width. Substitution requires PCB layout verification to confirm pad spacing and clearance compatibility. These packages are not interchangeable without layout modification.

Q: Why do some substitutes have 24mA output current instead of 12mA?

A: Output current capability is a design parameter that varies by manufacturer and product line. Higher current variants (24mA) provide increased drive capability for applications requiring stronger signal buffering. Lower current requirements are satisfied by either specification; higher current capability does not create incompatibility.

Q: Is CLVC244AQPWRG4Q1 suitable for automotive applications?

A: CLVC244AQPWRG4Q1 carries AEC-Q100 automotive qualification and operates across -40°C–125°C, meeting automotive temperature and reliability standards. Non-automotive variants lack this qualification and are not approved for automotive use.

Q: What does "obsolete" product status mean for the original part?

A: Obsolete status indicates the manufacturer has discontinued production and support. Existing inventory may be available through distributors, but long-term procurement is not guaranteed. Active substitutes ensure design continuity and future availability.

Q: Can I substitute a part with higher supply voltage range?

A: Yes, provided the application's actual supply voltage falls within the substitute's specified range. A part rated 1.65V–3.6V operates correctly in systems using 3.3V or 5V supplies, but not in systems requiring 1.2V operation.

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