SN74HCT244PW Equivalent & Substitute Parts

Part Overview

The SN74HCT244PW is a non-inverting buffer logic integrated circuit 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 currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HCT244 series maintains consistent functional specifications across multiple manufacturers, enabling direct substitution based on electrical and mechanical parameter alignment.

Substiute Parts

SN74HCT244PW

Texas InstrumentsIn Stock: 2179SN74HCT244PW Datasheet

Current PartRFQ

SN74HCT244PWR

Texas InstrumentsIn Stock: 16444SN74HCT244PWR Datasheet

DirectRFQ

MC74HCT244ADTR2G

onsemiIn Stock: 4545MC74HCT244ADTR2G Datasheet

DirectRFQ

74HCT123D,653

NXP SemiconductorsIn Stock: 3673574HCT123D,653 Datasheet

MFR RecommendedRFQ

74HCT244PW,118

Nexperia USA Inc.In Stock: 216974HCT244PW,118 Datasheet

MFR RecommendedRFQ

74HCT244PW-Q100,11

Nexperia USA Inc.In Stock: 318874HCT244PW-Q100,11 Datasheet

MFR RecommendedRFQ

MM74HCT244MTCX

onsemiIn Stock: 15996MM74HCT244MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCT244PW is determined by strict alignment of 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
• Voltage - Supply: 4.5V ~ 5.5V
• Current - Output High, Low: 6mA, 6mA (or higher)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: direct functional equivalents with identical electrical specifications, and manufacturer-recommended alternatives that maintain core functionality within the 74HCT244 series. All listed substitutes meet or exceed the original part's electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74HCT244PWR (Texas Instruments)

The SN74HCT244PWR is the direct equivalent from the original manufacturer with identical electrical specifications and active product status. This part maintains the same operating temperature range (-40°C ~ 85°C) and current ratings (6mA, 6mA) as the original SN74HCT244PW. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tube), which does not affect functional compatibility. With 16,397 units in stock, this represents the most readily available option.

Secondary Substitutes: 74HCT244PW,118 and 74HCT244PW-Q100,11 (Nexperia USA Inc.)

Both Nexperia parts maintain identical electrical specifications with extended operating temperature range (-40°C ~ 125°C), providing enhanced thermal performance. The 74HCT244PW-Q100,11 variant includes AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components. Both parts are active and available in Tape & Reel packaging.

Alternative Substitute: MC74HCT244ADTR2G (onsemi)

The onsemi part provides the widest operating temperature range (-55°C ~ 125°C) and is active with 4,507 units in stock. Output current is rated at 7.2mA (versus 6mA), exceeding the original specification and providing additional drive capability margin.

Consideration: MM74HCT244MTCX (onsemi)

This part features slightly elevated output current (7.2mA, 7.2mA) and maintains the original operating temperature range. It is suitable for applications where additional output drive current provides design margin.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT244PWR be used as a direct replacement for SN74HCT244PW?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, logic type, element count, bit configuration, output type, supply voltage, and current ratings. The packaging format differs (Cut Tape & Digi-Reel® versus Tube), but this does not affect functional compatibility on the circuit board.

Q: What is the difference between the Nexperia and onsemi substitutes?

A: All Nexperia and onsemi substitutes maintain the core 74HCT244 functional specification. The primary differences are operating temperature range and output current ratings. Nexperia parts extend the upper operating temperature to 125°C, while onsemi parts provide either extended temperature range (-55°C ~ 125°C) or elevated output current (7.2mA). Select based on your application's thermal and drive requirements.

Q: Is the 74HCT244PW-Q100,11 suitable for automotive applications?

A: Yes. The 74HCT244PW-Q100,11 carries AEC-Q100 automotive qualification, making it appropriate for automotive-grade designs. It maintains identical electrical specifications to the original part with extended operating temperature range.

Q: Does the 20-TSSOP package remain consistent across all substitutes?

A: Yes. All listed substitutes use the 20-TSSOP (0.173", 4.40mm Width) package, ensuring mechanical and pin compatibility with the original SN74HCT244PW.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original part's environmental and regulatory status.