SN74LVC244APWRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC244APWRG4 is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability in a 20-TSSOP surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a 1.65V to 3.6V supply voltage range with ±24mA output current capability and is rated for -40°C to 125°C operating temperature.

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 SN74LVC244APWRG4 is determined by strict equivalence across the following critical 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 minimum

Substitute parts are categorized into two groups: Parametric Equivalents (identical electrical and mechanical specifications) and Manufacturer Recommended alternatives (functionally equivalent with minor parameter variations).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Voltage - Supply	Current - Output (mA)	Operating Temp (°C)	Grade	Product Status	Packaging
SN74LVC244APWRG4	Texas Instruments	74LVC	1.65V ~ 3.6V	24, 24	-40 ~ 125	Standard	Discontinued	Tape & Reel
CLVC244AQPWRG4Q1	Texas Instruments	74LVC	1.65V ~ 3.6V	24, 24	-40 ~ 125	Automotive (AEC-Q100)	Active	Tape & Reel
SN74LVC244APWR	Texas Instruments	74LVC	1.65V ~ 3.6V	24, 24	-40 ~ 125	Standard	Active	Cut Tape & Digi-Reel
SN74LVC244APWRG3	Texas Instruments	74LVC	1.65V ~ 3.6V	24, 24	-40 ~ 125	Standard	Active	Tape & Reel
SN74LVC244APWT	Texas Instruments	74LVC	1.65V ~ 3.6V	24, 24	-40 ~ 125	Standard	Active	Tape & Reel
SN74LVC244AQPWRQ1	Texas Instruments	74LVC	1.65V ~ 3.6V	24, 24	-40 ~ 125	Automotive (AEC-Q100)	Active	Cut Tape & Digi-Reel
74LCX2244MTCX	Fairchild Semiconductor	74LCX	2V ~ 3.6V	12, 12	-40 ~ 85	Standard	Active	Bulk
74LCX244MTC	onsemi	74LCX	2V ~ 3.6V	24, 24	-40 ~ 85	Standard	Active	Tube
74LCX244MTCX	onsemi	74LCX	2V ~ 3.6V	24, 24	-40 ~ 85	Standard	Active	Cut Tape & Digi-Reel
74LVC2244APW,118	NXP Semiconductors	74LVC	1.2V ~ 3.6V	12, 12	-40 ~ 125	Standard	Active	Bulk
74LVC244APW-Q100J	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	24, 24	-40 ~ 125	Automotive (AEC-Q100)	Active	Tape & Reel

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

SN74LVC244APWR, SN74LVC244APWRG3, and SN74LVC244APWT are direct parametric equivalents to the SN74LVC244APWRG4. All three maintain identical electrical specifications (1.65V ~ 3.6V supply, 24mA output current, -40°C to 125°C operating range) and 20-TSSOP packaging. These parts are currently active in production and available in higher quantities. Selection among these three should be based on packaging preference: Cut Tape & Digi-Reel for individual component procurement or Tape & Reel for production volumes.

Automotive-Grade Alternatives:

CLVC244AQPWRG4Q1 and SN74LVC244AQPWRQ1 are automotive-qualified variants (AEC-Q100) with identical electrical performance to the original part. These are suitable for applications requiring automotive-grade components and are currently in active production status.

Cross-Manufacturer Alternatives:

74LCX244MTCX (onsemi) and 74LCX244MTC (onsemi) maintain the same logic function, element count, and 3-state output configuration with 24mA output current. However, these parts operate across a narrower supply voltage range (2V ~ 3.6V versus 1.65V ~ 3.6V) and support a reduced operating temperature range (-40°C to 85°C versus -40°C to 125°C). These are suitable only for applications that do not require operation below 2V supply or above 85°C.

74LCX2244MTCX (Fairchild Semiconductor) and 74LVC2244APW,118 (NXP Semiconductors) feature reduced output current (12mA versus 24mA) and should be evaluated only if the application's current requirements do not exceed 12mA per output.

Frequently Asked Questions (FAQ)

Q: Can I use 74LCX244MTCX as a direct replacement for SN74LVC244APWRG4?

A: 74LCX244MTCX is functionally compatible for logic operation but has two critical limitations: the supply voltage range is restricted to 2V ~ 3.6V (versus 1.65V ~ 3.6V), and the maximum operating temperature is 85°C (versus 125°C). Use this part only if your application operates within these narrower ranges.

Q: What is the difference between the Texas Instruments 74LVC variants?

A: SN74LVC244APWR, SN74LVC244APWRG3, and SN74LVC244APWT are electrically identical to the original SN74LVC244APWRG4. The differences are in packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and inventory availability. Select based on your procurement method.

Q: Are automotive-grade parts (CLVC244AQPWRG4Q1, SN74LVC244AQPWRQ1) required for non-automotive applications?

A: Automotive-grade parts are not required for non-automotive applications. They are suitable for use in any application but typically carry higher cost. Use standard-grade equivalents unless automotive qualification is a design requirement.

Q: Why do some substitutes have lower output current (12mA)?

A: 74LVC2244APW,118 and 74LCX2244MTCX are designed for lower-power applications. These parts are suitable only if your design requires no more than 12mA per output. Verify your circuit's current requirements before selecting these alternatives.

Q: Can I mix different substitute parts in the same design?

A: All listed parametric equivalents and manufacturer-recommended alternatives are pin-compatible in the 20-TSSOP package. However, ensure that the selected part's electrical specifications (supply voltage range, output current, operating temperature) meet your application requirements. Do not mix parts with different current or temperature ratings in the same circuit unless the design accounts for these differences.

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