SN74LVC244APWRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC244APWRE4 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 for the SN74LVC244APWRE4 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 (TA)

Substitute parts are categorized into two groups:

Parametric Equivalents (Texas Instruments 74LVC Series): Parts with identical electrical specifications, supply voltage range, and temperature rating. These include CLVC244AQPWRG4Q1, SN74LVC244APWR, SN74LVC244APWRG3, SN74LVC244APWT, and SN74LVC244AQPWRQ1. Differences are limited to packaging format (Tape & Reel, Cut Tape, or Bulk) and product status (Active vs. Discontinued).

Manufacturer Recommended Alternatives (74LCX Series and Extended Range): Parts from alternative manufacturers (Fairchild Semiconductor, onsemi, NXP Semiconductors, Nexperia USA Inc.) that maintain the core functional specification but may have reduced supply voltage range (2V minimum instead of 1.65V) or reduced operating temperature range (-40°C to 85°C instead of 125°C). These include 74LCX2244MTCX, 74LCX244MTC, 74LCX244MTCX, 74LVC2244APW,118, and 74LVC244APW-Q100J.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status
SN74LVC244APWRE4	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	1.65 ~ 3.6V	-40 ~ 125	20-TSSOP	Discontinued
CLVC244AQPWRG4Q1	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	1.65 ~ 3.6V	-40 ~ 125	20-TSSOP	Active
SN74LVC244APWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	1.65 ~ 3.6V	-40 ~ 125	20-TSSOP	Active
SN74LVC244APWRG3	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	1.65 ~ 3.6V	-40 ~ 125	20-TSSOP	Active
SN74LVC244APWT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	1.65 ~ 3.6V	-40 ~ 125	20-TSSOP	Active
SN74LVC244AQPWRQ1	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	1.65 ~ 3.6V	-40 ~ 125	20-TSSOP	Active
74LCX2244MTCX	Fairchild Semiconductor	Buffer, Non-Inverting	2	4	3-State	12, 12	2.0 ~ 3.6V	-40 ~ 85	20-TSSOP	Active
74LCX244MTC	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	2.0 ~ 3.6V	-40 ~ 85	20-TSSOP	Active
74LCX244MTCX	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	2.0 ~ 3.6V	-40 ~ 85	20-TSSOP	Active
74LVC2244APW,118	NXP Semiconductors	Buffer, Non-Inverting	2	4	3-State	12, 12	1.2 ~ 3.6V	-40 ~ 125	20-TSSOP	Active
74LVC244APW-Q100J	Nexperia USA Inc.	Buffer, Non-Inverting	2	4	3-State	24, 24	1.2 ~ 3.6V	-40 ~ 125	20-TSSOP	Active

Engineering Selection Recommendations

Direct Replacements (Highest Compatibility):

SN74LVC244APWR, SN74LVC244APWRG3, SN74LVC244APWT, and SN74LVC244AQPWRQ1 are direct parametric equivalents from Texas Instruments with identical electrical specifications and temperature ratings. These parts differ only in packaging format (Cut Tape, Tape & Reel, or Bulk) and are all in Active product status with substantial inventory availability. Selection among these should be based on procurement packaging requirements and lead time.

CLVC244AQPWRG4Q1 is an automotive-grade equivalent (AEC-Q100 qualified) with identical electrical specifications. This part is suitable for applications requiring automotive qualification and is currently in Active status.

Alternative Manufacturer Options:

74LCX244MTCX (onsemi) and 74LCX244MTC (onsemi) maintain full output current capability (24mA) but operate within a reduced supply voltage range (2.0V minimum instead of 1.65V) and reduced temperature range (-40°C to 85°C instead of 125°C). These are suitable for applications not requiring the extended low-voltage or high-temperature performance of the original part.

74LCX2244MTCX (Fairchild Semiconductor) provides reduced output current (12mA) with the same voltage and temperature limitations as the onsemi alternatives. This part is appropriate only for applications with lower current drive requirements.

74LVC2244APW,118 (NXP Semiconductors) offers extended low-voltage operation (1.2V minimum) but with reduced output current (12mA) and maintains the full temperature range (-40°C to 125°C). This part is suitable for low-voltage applications with moderate current requirements.

74LVC244APW-Q100J (Nexperia USA Inc.) is an automotive-grade part (AEC-Q100 qualified) with full output current capability, extended low-voltage operation (1.2V minimum), and full temperature range support. This part is the most versatile alternative for automotive applications requiring extended operating parameters.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC244APWR as a direct replacement for SN74LVC244APWRE4?

A: Yes. SN74LVC244APWR is a parametric equivalent with identical electrical specifications, supply voltage range (1.65V ~ 3.6V), operating temperature range (-40°C ~ 125°C), and output current capability (24mA). The only difference is packaging format. Both are Texas Instruments 74LVC series parts.

Q: What is the difference between the Texas Instruments 74LVC equivalents and the onsemi 74LCX alternatives?

A: The primary differences are supply voltage range and operating temperature range. Texas Instruments 74LVC parts operate from 1.65V minimum, while onsemi 74LCX parts operate from 2.0V minimum. Additionally, 74LCX parts are rated only to 85°C maximum, compared to 125°C for 74LVC parts. Output current capability is identical at 24mA for both series.

Q: Is the CLVC244AQPWRG4Q1 suitable for automotive applications?

A: Yes. CLVC244AQPWRG4Q1 carries AEC-Q100 automotive qualification and maintains identical electrical specifications to the original SN74LVC244APWRE4. It is appropriate for automotive-grade designs requiring this certification.

Q: Why do some substitute parts have lower output current ratings?

A: The 74LCX2244MTCX (Fairchild) and 74LVC2244APW,118 (NXP) are specified with 12mA output current instead of 24mA. These parts are suitable only for applications with lower current drive requirements. If your design requires 24mA output current, select alternatives with matching current specifications.

Q: Can I use 74LCX244MTCX in a design requiring operation below 2.0V?

A: No. The 74LCX244MTCX minimum supply voltage is 2.0V. If your design requires operation at 1.65V, select a Texas Instruments 74LVC part or the NXP 74LVC2244APW,118 or Nexperia 74LVC244APW-Q100J, which support lower voltage operation.

Q: What packaging options are available for the active equivalents?

A: Active equivalents are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel® (SN74LVC244APWR, SN74LVC244AQPWRQ1), Tape & Reel (TR) (CLVC244AQPWRG4Q1, SN74LVC244APWRG3, SN74LVC244APWT), and Bulk (74LVC2244APW,118). Select based on your procurement and assembly requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Most substitute parts are RoHS3 compliant. Verify compliance status for specific part numbers in your procurement documentation, as compliance may vary by manufacturer and part variant.

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