SN74LVC244APWTG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC244APWTG4 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 device operates across a supply voltage range of 1.65V to 3.6V and is housed in a 20-TSSOP surface mount package. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

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	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC244APWTG4 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Package / Case: 20-TSSOP
Mounting Type: Surface Mount
Current - Output High, Low: 24mA, 24mA (or higher)
Voltage - Supply: Must encompass or exceed 1.65V ~ 3.6V range
Operating Temperature: Must support -40°C ~ 125°C (TA)

Substitute parts are categorized into two groups:

Parametric Equivalents (Texas Instruments 74LVC Series): Parts that match all critical electrical parameters and maintain identical supply voltage and temperature specifications. These include CLVC244AQPWRG4Q1, SN74LVC244APWR, SN74LVC244APWRG3, SN74LVC244APWT, and SN74LVC244AQPWRQ1. Packaging variations (Tape & Reel, Cut Tape, Digi-Reel) do not affect functional equivalence.

Manufacturer Recommended Alternatives: Parts from alternative manufacturers (Fairchild Semiconductor, onsemi, NXP Semiconductors, Nexperia USA Inc.) that maintain the same logic function, element count, bit configuration, and 3-state output. These parts operate within compatible voltage ranges (2V ~ 3.6V or 1.2V ~ 3.6V) and temperature specifications, with output current capabilities of 12mA to 24mA.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Logic Type	Elements / Bits	Output Type	Current (mA)	Voltage Supply	Temp Range	Package	Product Status	Grade
SN74LVC244APWTG4	Texas Instruments	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Discontinued	Standard
CLVC244AQPWRG4Q1	Texas Instruments	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Automotive (AEC-Q100)
SN74LVC244APWR	Texas Instruments	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Standard
SN74LVC244APWRG3	Texas Instruments	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Standard
SN74LVC244APWT	Texas Instruments	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Standard
SN74LVC244AQPWRQ1	Texas Instruments	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Automotive (AEC-Q100)
74LCX2244MTCX	Fairchild Semiconductor	74LCX	Buffer, Non-Inverting	2 / 4	3-State	12, 12	2V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Active	Standard
74LCX244MTC	onsemi	74LCX	Buffer, Non-Inverting	2 / 4	3-State	24, 24	2V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Active	Standard
74LCX244MTCX	onsemi	74LCX	Buffer, Non-Inverting	2 / 4	3-State	24, 24	2V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Active	Standard
74LVC2244APW,118	NXP Semiconductors	74LVC	Buffer, Non-Inverting	2 / 4	3-State	12, 12	1.2V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Standard
74LVC244APW-Q100J	Nexperia USA Inc.	74LVC	Buffer, Non-Inverting	2 / 4	3-State	24, 24	1.2V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active	Automotive (AEC-Q100)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): SN74LVC244APWR, SN74LVC244APWRG3, and SN74LVC244APWT are direct parametric equivalents with active product status and identical electrical characteristics. These parts are recommended for applications requiring no design modification.

For Automotive Applications: CLVC244AQPWRG4Q1, SN74LVC244AQPWRQ1, and 74LVC244APW-Q100J carry AEC-Q100 automotive qualification and maintain full electrical compatibility. These are suitable for automotive-grade designs.

For Alternative Manufacturers: 74LCX244MTCX (onsemi) and 74LCX244MTC (onsemi) provide equivalent functionality with active status. These parts operate within a reduced voltage range (2V ~ 3.6V) and reduced temperature range (-40°C ~ 85°C), requiring verification that application requirements fall within these limits.

74LVC2244APW,118 (NXP Semiconductors) offers extended lower voltage support (1.2V ~ 3.6V) with reduced output current (12mA), suitable for low-power applications.

74LCX2244MTCX (Fairchild Semiconductor) operates at reduced output current (12mA) and narrower voltage/temperature ranges, requiring application-specific validation.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC244APWR as a direct replacement for SN74LVC244APWTG4? A: Yes. SN74LVC244APWR is a parametric equivalent with identical logic type, element count, bit configuration, output type, current ratings, voltage supply range, and operating temperature range. The only difference is packaging format (Cut Tape & Digi-Reel vs. the original packaging).

Q: What is the difference between the Texas Instruments 74LVC and 74LCX series substitutes? A: The 74LCX series (Fairchild, onsemi) operates at a reduced voltage range (2V ~ 3.6V minimum vs. 1.65V) and reduced temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). Verify your application operates within these narrower specifications before substitution.

Q: Are automotive-grade parts (AEC-Q100) compatible with standard applications? A: Yes. Automotive-qualified parts (CLVC244AQPWRG4Q1, SN74LVC244AQPWRQ1, 74LVC244APW-Q100J) meet or exceed standard specifications and are functionally compatible with non-automotive designs. They offer additional reliability qualification.

Q: Why do some substitutes have lower output current ratings (12mA vs. 24mA)? A: 74LVC2244APW,118 (NXP) and 74LCX2244MTCX (Fairchild) are designed for lower-power applications. Verify your circuit's current requirements do not exceed 12mA per output before selecting these parts.

Q: Does the 20-TSSOP package remain consistent across all substitutes? A: Yes. All listed substitutes use the identical 20-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring PCB layout compatibility without modification.

Q: Can I substitute parts with different voltage supply ranges? A: Substitution is valid only if your application's operating voltage falls within the substitute part's specified range. For example, if your circuit operates at 1.5V, only parts supporting 1.2V ~ 3.6V or 1.65V ~ 3.6V are suitable.

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