74LVC244ADB,118 Equivalent & Substitute Parts

Part Overview

The 74LVC244ADB,118 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 system design and procurement.

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	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74LVC244ADB,118 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: 24mA drive capability (high and low)
Supply Voltage Range: Minimum 1.2V to 3.6V maximum
Operating Temperature: -40°C to 125°C
Package Compatibility: 20-SSOP or 20-TSSOP form factors

Substitute parts are grouped into two categories based on package type and electrical specifications. Parts maintaining the 20-SSOP package with identical electrical parameters provide direct pin-compatible substitution. Parts utilizing the 20-TSSOP package (0.173" width) offer functional equivalence with different physical footprint characteristics. The 74LCX series variants operate at reduced output current (12mA) and narrower supply voltage range (2V minimum), requiring design verification for current-limited applications.

Parameter Comparison

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

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

74LVC244APW,118 from Nexperia USA Inc. provides the closest functional match with identical electrical specifications and active product status. This part maintains 24mA output current and 1.2V to 3.6V supply voltage range. The transition from 20-SSOP to 20-TSSOP package requires PCB layout modification but maintains electrical equivalence.

CLVC244AQPWRG4Q1 from Texas Instruments offers automotive-grade qualification (AEC-Q100) with 24mA output current and extended temperature range (-40°C to 125°C). Supply voltage minimum is 1.65V, which is compatible with the original 1.2V to 3.6V specification for most applications.

Secondary Substitutes (Reduced Output Current)

SN74LVC2244ADBR and SN74LVC2244ADBQR from Texas Instruments maintain the 20-SSOP package format with reduced output current of 12mA. These parts are suitable for applications where lower drive current is acceptable. Supply voltage range of 1.65V to 3.6V covers the majority of the original specification.

Functional Equivalents (Package Variation)

74LCX244MTCX and 74LCX244MTC from onsemi provide 24mA output current in 20-TSSOP package with 2V to 3.6V supply voltage range. Operating temperature is limited to -40°C to 85°C. These parts are suitable for designs not requiring the full 1.2V minimum supply voltage or extended upper temperature range.

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

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

A: No. While electrically equivalent, 74LVC244APW,118 uses 20-TSSOP package (4.40mm width) versus the original 20-SSOP package (5.30mm width). PCB footprint modification is required. Pin count and signal assignments remain identical.

Q: What is the difference between 74LCX244 and 74LVC244 series?

A: The 74LCX series operates at 2V to 3.6V supply voltage, while 74LVC244 operates at 1.2V to 3.6V. The 74LCX series is suitable for 3.3V and higher systems. The 74LVC series supports lower voltage applications including 1.8V and 2.5V systems.

Q: Are SN74LVC2244 parts compatible with the original 74LVC244ADB,118?

A: SN74LVC2244 parts feature reduced output current (12mA versus 24mA) and narrower operating temperature range (-40°C to 85°C versus -40°C to 125°C). Electrical compatibility depends on application current requirements and temperature specifications. Design verification is necessary.

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

A: 74LVC244APW,118 from Nexperia and CLVC244AQPWRG4Q1 from Texas Instruments both carry active product status with high inventory levels, ensuring sustained availability for production and procurement planning.

Q: Does package type affect electrical performance?

A: No. 20-SSOP, 20-TSSOP, and 20-TVSOP packages are functionally equivalent for this logic buffer. Package selection is determined by PCB layout constraints and manufacturing capabilities. Electrical specifications remain identical across package variants of the same part series.

Q: What is the significance of MSL rating in substitute selection?

A: All listed substitutes maintain MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling requirements are identical to the original part, simplifying supply chain management and manufacturing processes.

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