74LVC244ADB,112 Equivalent & Substitute Parts

Part Overview

The 74LVC244ADB,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 component operates across a supply voltage range of 1.2V to 3.6V and is housed in a 20-SSOP package with a width of 5.30mm. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC244ADB,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-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LVC244ADB,112 is determined by the following critical parameters:

Logic Function: Buffer, Non-Inverting with 2 elements and 4 bits per element
Output Configuration: 3-State output capability
Output Current Capability: 24mA high and low drive current
Supply Voltage Range: Minimum 1.2V support required
Operating Temperature Range: -40°C to 125°C minimum
Package Compatibility: 20-SSOP or 20-TSSOP footprints (both 20-pin configurations)

Substitute parts are grouped into two categories based on package type and electrical specifications:

Category 1 - Same Package (20-SSOP): Parts maintaining the original 20-SSOP footprint with equivalent electrical performance.

Category 2 - Alternative Package (20-TSSOP): Parts with identical logic function and electrical specifications but in the narrower 20-TSSOP package (0.173", 4.40mm width), which is mechanically compatible on PCBs designed for SSOP spacing.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Current (mA)	Supply Voltage	Temp Range (°C)	Package	Status
74LVC244ADB,112	Nexperia USA Inc.	Buffer, Non-Inverting	2 / 4	24, 24	1.2V ~ 3.6V	-40 ~ 125	20-SSOP	Obsolete
74LVC244APW,118	Nexperia USA Inc.	Buffer, Non-Inverting	2 / 4	24, 24	1.2V ~ 3.6V	-40 ~ 125	20-TSSOP	Active
74LCX244MTCX	onsemi	Buffer, Non-Inverting	2 / 4	24, 24	2V ~ 3.6V	-40 ~ 85	20-TSSOP	Active
74LCX244MTC	onsemi	Buffer, Non-Inverting	2 / 4	24, 24	2V ~ 3.6V	-40 ~ 85	20-TSSOP	Active
74LCX2244MTCX	Fairchild Semiconductor	Buffer, Non-Inverting	2 / 4	12, 12	2V ~ 3.6V	-40 ~ 85	20-TSSOP	Active
CLVC244AQPWRG4Q1	Texas Instruments	Buffer, Non-Inverting	2 / 4	24, 24	1.65V ~ 3.6V	-40 ~ 125	20-TSSOP	Active
SN74LVC2244ADBQR	Texas Instruments	Buffer, Non-Inverting	2 / 4	12, 12	1.65V ~ 3.6V	-40 ~ 85	20-SSOP	Active
SN74LVC2244ADBR	Texas Instruments	Buffer, Non-Inverting	2 / 4	12, 12	1.65V ~ 3.6V	-40 ~ 85	20-SSOP	Active
SN74LVC2244ADGVR	Texas Instruments	Buffer, Non-Inverting	2 / 4	12, 12	1.65V ~ 3.6V	-40 ~ 85	20-TVSOP	Active
SN74LVC2244APW	Texas Instruments	Buffer, Non-Inverting	2 / 4	12, 12	1.65V ~ 3.6V	-40 ~ 85	20-TSSOP	Active
SN74LVC2244APWR	Texas Instruments	Buffer, Non-Inverting	2 / 4	12, 12	1.65V ~ 3.6V	-40 ~ 85	20-TSSOP	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement (Same Package)

74LVC244APW,118 from Nexperia USA Inc. is the direct functional equivalent in 20-TSSOP package. It maintains identical electrical specifications (24mA output current, 1.2V to 3.6V supply range, -40°C to 125°C operating temperature) and is currently in active production status with unlimited moisture sensitivity rating.

Alternative Selections - Package Variants

For designs requiring the original 20-SSOP footprint, SN74LVC2244ADBR or SN74LVC2244ADBQR from Texas Instruments provide active production alternatives. Both are ROHS3 compliant and maintain the 20-SSOP package. Note that these parts specify 12mA output current (reduced from 24mA) and operate to -40°C to 85°C, which may require circuit verification if higher drive current or extended temperature operation is required.

Automotive-Grade Option

CLVC244AQPWRG4Q1 from Texas Instruments is qualified to AEC-Q100 automotive standards and operates across 1.65V to 3.6V with 24mA output current and -40°C to 125°C temperature range in 20-TSSOP package.

Lower Current Alternatives

74LCX244MTCX and 74LCX244MTC from onsemi provide 24mA output current in 20-TSSOP package but operate only to -40°C to 85°C and require minimum 2V supply voltage. 74LCX2244MTCX from Fairchild Semiconductor offers the same package but with reduced 12mA output current.

All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can 74LVC244APW,118 directly replace 74LVC244ADB,112 on the PCB?

A: 74LVC244APW,118 is functionally equivalent but uses 20-TSSOP package (0.173" width) versus the original 20-SSOP (0.209" width). Both are 20-pin configurations with identical pin assignments. PCB footprints designed for SSOP spacing will accommodate TSSOP components. Verify your PCB layout supports the narrower package width.

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

A: Both are non-inverting buffer logic families with identical pin configurations and logic function. The 74LVC series (Nexperia, Texas Instruments) supports lower supply voltage starting at 1.2V, while 74LCX series (onsemi, Fairchild) requires minimum 2V supply. Select based on your circuit's minimum supply voltage requirement.

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

A: Output current capability determines the maximum load that can be driven. The 74LVC2244 variants from Texas Instruments provide 12mA per output. If your circuit requires 24mA drive capability, select parts explicitly rated for 24mA output current (74LVC244APW,118, 74LCX244MTCX, 74LCX244MTC, or CLVC244AQPWRG4Q1).

Q: Are there temperature range limitations with substitute parts?

A: The original 74LVC244ADB,112 operates to 125°C. Most Texas Instruments 74LVC2244 variants operate only to 85°C. If your application requires -40°C to 125°C operation, select 74LVC244APW,118 (Nexperia) or CLVC244AQPWRG4Q1 (Texas Instruments automotive grade).

Q: What does "3-State Output" mean for substitution purposes?

A: 3-State output means the buffer can drive high, drive low, or enter a high-impedance state. All listed substitutes maintain this functionality, enabling bus-sharing applications. Verify your circuit design uses the output enable control pins appropriately.

Q: Is ROHS3 compliance important for my selection?

A: All listed substitute parts are ROHS3 compliant, meeting current environmental regulations for lead-free and restricted substance requirements. This is standard for active production components.

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