74F244MSAX Equivalent & Substitute Parts

Part Overview

The 74F244MSAX is a non-inverting buffer logic integrated circuit manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74F244MSAX

onsemiIn Stock: 106774F244MSAX Datasheet

Current PartRFQ

SN74F244DBR

Texas InstrumentsIn Stock: 2793SN74F244DBR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F244MSAX is determined by strict equivalence across the following critical parameters:

• Logic function: Non-inverting buffer with identical element and bit configuration (2 elements, 4 bits per element)
• Output architecture: 3-state output capability
• Electrical specifications: Supply voltage range 4.5V to 5.5V
• Package format: 20-SSOP surface mount package with matching physical dimensions
• Operating temperature range: 0°C to 70°C

The SN74F244DBR from Texas Instruments satisfies all substitution criteria. Both parts implement the 74F logic family standard, share identical functional architecture, and are housed in equivalent 20-SSOP packages. The substitute maintains full electrical and mechanical compatibility within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN74F244DBR is the direct functional equivalent for the obsolete 74F244MSAX. Both components share identical logic architecture, electrical specifications, and package geometry. The Texas Instruments SN74F244DBR maintains active product status, ensuring long-term availability and supply chain continuity.

The SN74F244DBR carries RoHS3 compliance certification, meeting current environmental and regulatory standards. Both parts are classified as REACH Unaffected and carry EAR99 export classification.

Output current specifications differ slightly: the SN74F244DBR provides 15mA output high current compared to 3mA for the 74F244MSAX, while output low current remains at 64mA for both devices. This difference represents an improvement in drive capability and does not restrict substitution in standard applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74F244DBR directly replace the 74F244MSAX without circuit modification?

A: Yes. Both parts implement identical logic functions, operate within the same supply voltage range (4.5V to 5.5V), share the same 20-SSOP package footprint, and support the same operating temperature range (0°C to 70°C). No circuit modifications are required for direct substitution.

Q: What is the significance of the difference in output high current (3mA vs. 15mA)?

A: The SN74F244DBR provides higher output drive capability. This represents an enhancement that improves signal integrity and fan-out capacity. Applications designed for the 74F244MSAX will operate correctly with the increased drive current of the substitute.

Q: Are there any compliance or certification differences between these parts?

A: The SN74F244DBR carries RoHS3 compliance certification. Both parts are REACH Unaffected and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The substitute meets current environmental standards while maintaining regulatory equivalence.

Q: Why is the 74F244MSAX classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The SN74F244DBR from Texas Instruments provides continued access to this logic function through an active, supported product line.

Q: Are the packages physically identical?

A: Yes. Both parts use the 20-SSOP package with identical physical dimensions (0.209" width, 5.30mm). PCB footprints and land patterns are interchangeable.