SN74LVC2244ADWRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC2244ADWRE4 is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This 20-SOIC surface mount device operates across a 1.65V to 3.6V supply voltage range and is designed for low-voltage digital signal buffering applications.

The SN74LVC2244ADWRE4 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers, offering identical or enhanced electrical characteristics within compatible package configurations. Substitution is necessary to maintain design continuity and ensure component availability for production and repair applications.

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	12mA, 12mA
Voltage - Supply	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

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)
Mounting Type: Surface Mount

Electrical Parameter Tolerance:

Supply Voltage Range: Must encompass or be compatible with 1.65V ~ 3.6V
Output Current: Must meet or exceed 12mA per output
Operating Temperature: Must support -40°C ~ 85°C minimum

Substitute parts are grouped into two categories:

Category 1 - Direct Parametric Equivalents (74LVC Series): Parts maintaining identical electrical specifications and voltage range compatibility with the original SN74LVC2244ADWRE4.

Category 2 - Enhanced Specification Substitutes (74LCX Series): Parts with increased output current capability (24mA) and extended voltage range (2V ~ 5.5V), providing superior performance margins while maintaining functional compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Output Current (mA)	Supply Voltage Range	Operating Temperature	Package	Product Status
SN74LVC2244ADWRE4	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65V ~ 3.6V	-40°C ~ 85°C	20-SOIC	Discontinued
SN74LVC2244ADWR	Texas Instruments	Buffer, Non-Inverting	12, 12	1.65V ~ 3.6V	-40°C ~ 85°C	20-SOIC	Active
74LVC2244AD,118	NXP USA Inc.	Buffer, Non-Inverting	12, 12	1.2V ~ 3.6V	-40°C ~ 125°C	20-SOIC	Active
74LCX244WM	onsemi	Buffer, Non-Inverting	24, 24	2V ~ 3.6V	-40°C ~ 85°C	20-SOIC	Active
74LCX244WMX	Fairchild Semiconductor	Buffer, Non-Inverting	24, 24	2V ~ 3.6V	-40°C ~ 85°C	20-SOIC	Active
MC74LCX244DWG	onsemi	Buffer, Non-Inverting	24, 24	2V ~ 5.5V	-55°C ~ 125°C	20-SOIC	Active
MC74LCX244DWR2G	onsemi	Buffer, Non-Inverting	24, 24	2V ~ 5.5V	-55°C ~ 125°C	20-SOIC	Active

Engineering Selection Recommendations

First Priority - Direct Equivalent: SN74LVC2244ADWR (Texas Instruments) is the primary substitute. This part maintains identical electrical specifications and voltage range as the discontinued SN74LVC2244ADWRE4, with the only difference being packaging format (Tape & Reel vs. Tube). Active product status ensures long-term availability. Both parts are ROHS3 compliant with unlimited moisture sensitivity rating.

Secondary Priority - Extended Specification Substitute: 74LVC2244AD,118 (NXP USA Inc.) provides identical output current and logic function with an extended operating temperature range (-40°C ~ 125°C) and lower minimum supply voltage (1.2V). This part is ROHS3 compliant and currently active. Selection is appropriate when extended temperature performance is required.

Performance-Enhanced Alternatives: 74LCX244WM, 74LCX244WMX, MC74LCX244DWG, and MC74LCX244DWR2G offer doubled output current capability (24mA) and extended voltage ranges. These 74LCX series parts are suitable for applications requiring higher drive capability or wider supply voltage tolerance. All are active products with ROHS3 compliance. MC74LCX244DWG and MC74LCX244DWR2G provide the widest operating temperature range (-55°C ~ 125°C).

All substitute parts maintain identical functional architecture (2 elements, 4 bits per element, 3-state output) and 20-SOIC package compatibility, ensuring direct PCB-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC2244ADWR be used as a direct replacement for SN74LVC2244ADWRE4?

A: Yes. SN74LVC2244ADWR is a direct parametric equivalent with identical electrical specifications, supply voltage range, output current, and operating temperature. The difference is packaging format (Tape & Reel vs. Tube). Both are 20-SOIC surface mount devices with identical pinout and functional behavior.

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

A: The 74LVC series operates at 1.65V ~ 3.6V with 12mA output current. The 74LCX series operates at 2V ~ 5.5V with 24mA output current. Both maintain identical logic function and 20-SOIC package. The 74LCX series provides higher drive capability and wider voltage range tolerance.

Q: Is the NXP 74LVC2244AD,118 compatible with the original part?

A: Yes. The NXP part maintains identical output current (12mA) and logic function. It offers an extended operating temperature range (-40°C ~ 125°C) and lower minimum supply voltage (1.2V). It is suitable for applications requiring enhanced temperature performance while maintaining the same electrical drive characteristics.

Q: Can I use MC74LCX244DWR2G in place of SN74LVC2244ADWRE4?

A: Yes, with performance enhancement. MC74LCX244DWR2G provides doubled output current (24mA vs. 12mA) and extended voltage range (2V ~ 5.5V). The extended operating temperature (-55°C ~ 125°C) exceeds the original specification. This part is suitable for applications requiring higher drive capability or wider environmental tolerance.

Q: What packaging formats are available for these substitute parts?

A: Substitute parts are available in Tape & Reel (TR), Tube, and Bulk packaging formats. All maintain the 20-SOIC surface mount package. Selection of packaging format depends on production volume and assembly process requirements. Electrical and functional specifications remain identical across all packaging options.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting environmental and hazardous substance restrictions. Compliance status is maintained across all manufacturers and packaging formats.

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