MM74HCT244WMX Equivalent & Substitute Parts

Part Overview

The MM74HCT244WMX is a non-inverting buffer logic integrated circuit manufactured by onsemi, designed for applications requiring 2-element, 4-bit per element buffering with 3-state output capability. This device operates across a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package. The part is currently active in production and widely available in inventory.

Substitute parts become necessary when the primary part number reaches end-of-life status, when specific packaging formats are unavailable, or when alternative manufacturers' equivalent devices offer improved lead times or cost advantages while maintaining functional compatibility.

Substiute Parts

MM74HCT244WMX

onsemiIn Stock: 1973MM74HCT244WMX Datasheet

Current PartRFQ

MC74HCT244ADWG

onsemiIn Stock: 2499MC74HCT244ADWG Datasheet

SimilarRFQ

MC74HCT244ADWR2G

onsemiIn Stock: 1758MC74HCT244ADWR2G Datasheet

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74HCT244D,653

Nexperia USA Inc.In Stock: 683574HCT244D,653 Datasheet

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CD74HCT244M

Texas InstrumentsIn Stock: 2026CD74HCT244M Datasheet

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CD74HCT244M96

Texas InstrumentsIn Stock: 5446CD74HCT244M96 Datasheet

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SN74HCT244DW

Texas InstrumentsIn Stock: 71659SN74HCT244DW Datasheet

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SN74HCT244DWR

Texas InstrumentsIn Stock: 6506SN74HCT244DWR Datasheet

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SN74HCT244NSR

Texas InstrumentsIn Stock: 3122SN74HCT244NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HCT244WMX is determined by the following critical parameters:

Functional Equivalence Requirements:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Voltage - Supply: 4.5V ~ 5.5V (mandatory range)
• Base Product Number: 74HCT244 (same logic family)

Mechanical Compatibility:

• Package / Case: 20-SOIC form factor (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Performance Considerations:

• Current - Output High, Low: Substitute parts must meet or exceed 6mA minimum
• Operating Temperature: Substitute parts must support at least -40°C ~ 85°C range
• Moisture Sensitivity Level: MSL 1 or MSL 3 acceptable

All substitute parts listed maintain the same base product number (74HCT244) and are manufactured by onsemi or equivalent tier-1 semiconductor manufacturers (Texas Instruments, Nexperia USA Inc.), ensuring design and functional compatibility with the original specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Equivalent Temperature Range):

SN74HCT244DWR and SN74HCT244NSR from Texas Instruments are direct functional equivalents with active product status. Both maintain the -40°C ~ 85°C operating temperature range matching the MM74HCT244WMX and are available in Cut Tape & Digi-Reel® packaging. SN74HCT244DWR offers higher inventory availability (6,437 units) compared to SN74HCT244NSR (3,100 units).

Extended Temperature Range Alternatives:

MC74HCT244ADWR2G and CD74HCT244M96 provide extended operating temperature ranges (-55°C ~ 125°C) while maintaining ROHS3 compliance and active product status. MC74HCT244ADWR2G is available in Tape & Reel format with 1,740 units in stock. CD74HCT244M96 is available in Cut Tape & Digi-Reel® format with 5,368 units in stock and MSL 1 rating.

Nexperia Alternative:

74HCT244D,653 from Nexperia USA Inc. provides extended temperature capability (-40°C ~ 125°C) with MSL 1 rating and highest inventory availability (6,782 units). This part is available in Tape & Reel packaging.

Discontinued Parts (Not Recommended for New Designs):

CD74HCT244M and SN74HCT244DW are discontinued at DiGi Electronics and should not be selected for new production designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I substitute MM74HCT244WMX with any 74HCT244 variant?

A: No. Substitution is limited to parts with identical logic configuration (2-element, 4-bit per element, non-inverting buffer, 3-state output), 20-SOIC package format, and 4.5V ~ 5.5V supply voltage range. Output current specifications must meet or exceed 6mA minimum. Operating temperature range must support at least -40°C ~ 85°C.

Q: What is the difference between Cut Tape & Digi-Reel® and Tube packaging?

A: Cut Tape & Digi-Reel® packaging is supplied on continuous tape suitable for automated pick-and-place assembly equipment. Tube packaging contains loose components in a plastic tube and is typically used for manual assembly or lower-volume applications. Both formats contain identical die and are functionally equivalent.

Q: Why do some substitutes have lower output current ratings (6mA vs 7.2mA)?

A: The MM74HCT244WMX specifies 7.2mA output current, while most substitute parts specify 6mA. Both ratings are within the 74HCT244 logic family specification and are functionally compatible. Applications requiring the full 7.2mA output current should verify substitute part datasheets for specific load requirements.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification. MSL ratings vary between MSL 1 (unlimited shelf life) and MSL 3 (168 hours), which affects storage and handling requirements but does not impact functional performance.

Q: Which substitute offers the best inventory availability?

A: 74HCT244D,653 from Nexperia USA Inc. offers the highest inventory availability with 6,782 units in stock, followed by CD74HCT244M96 with 5,368 units and SN74HCT244DWR with 6,437 units.

Q: Can I use parts with extended temperature ranges (-55°C ~ 125°C) as direct replacements?

A: Yes. Parts with extended temperature ranges are fully compatible as direct replacements. Extended temperature capability provides additional design margin for applications operating at temperature extremes, with no functional or electrical disadvantages for standard -40°C ~ 85°C applications.