74ACT244SJX Equivalent & Substitute Parts

Part Overview

The 74ACT244SJX is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

The 74ACT244 series provides buffering functionality suitable for applications requiring signal isolation and drive capability in 5V logic systems. Due to the obsolete status of the 74ACT244SJX, active production alternatives within the same functional family are available to maintain design continuity.

Substiute Parts

74ACT244SJX

onsemiIn Stock: 362574ACT244SJX Datasheet

Current PartRFQ

74ACT244MTCX

onsemiIn Stock: 206074ACT244MTCX Datasheet

SimilarRFQ

74ACT244SCX

onsemiIn Stock: 949874ACT244SCX Datasheet

SimilarRFQ

CD74ACT244M96

Texas InstrumentsIn Stock: 2027CD74ACT244M96 Datasheet

SimilarRFQ

SN74ACT244DW

Texas InstrumentsIn Stock: 7278SN74ACT244DW Datasheet

SimilarRFQ

SN74ACT244DWR

Texas InstrumentsIn Stock: 93153SN74ACT244DWR Datasheet

SimilarRFQ

SN74ACT244MNSREP

Texas InstrumentsIn Stock: 2291SN74ACT244MNSREP Datasheet

SimilarRFQ

SN74ACT241NSR

Texas InstrumentsIn Stock: 3434SN74ACT241NSR Datasheet

Parametric EquivalentRFQ

SN74ACT244NSR

Texas InstrumentsIn Stock: 2425SN74ACT244NSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT244SJX is determined by the following critical parameters that must remain constant across all equivalent parts:

• 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: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• Series: 74ACT

Substitute parts are grouped by package type, as the 74ACT244SJX uses a 20-SOP package. Direct functional equivalents are available in alternative package configurations (20-TSSOP, 20-SOIC) from both onsemi and Texas Instruments, all maintaining identical electrical specifications and logic functionality.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the 74ACT244SJX, select from active production parts with identical package specifications or compatible alternatives:

Same Package (20-SOP): SN74ACT244MNSREP and SN74ACT244NSR both provide the same 20-SOIC (0.209", 5.30mm Width) package as the original 74ACT244SJX. Both are active production parts with ROHS3 compliance and unlimited moisture sensitivity rating.

Alternative Packages: The 74ACT244MTCX (20-TSSOP) and 74ACT244SCX (20-SOIC wider variant) from onsemi, along with CD74ACT244M96 and SN74ACT244DWR from Texas Instruments, provide functionally equivalent alternatives in different package footprints. These options are suitable when PCB layout accommodates alternative package geometries.

Compliance Consideration: All active substitute parts carry ROHS3 compliance certification, meeting modern regulatory requirements. The original 74ACT244SJX carries REACH Unaffected status, consistent with all substitute options.

Inventory Availability: SN74ACT244DWR offers the highest inventory level (93,100 pcs) among active alternatives, providing supply chain stability for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the 74ACT244SJX be directly replaced with any of these substitute parts?

A: Direct replacement depends on package compatibility. SN74ACT244MNSREP and SN74ACT244NSR use the same 20-SOP package footprint as the 74ACT244SJX. Alternative packages (20-TSSOP, 20-SOIC) require PCB layout verification to confirm pin spacing and mounting area compatibility.

Q: What is the difference between the onsemi and Texas Instruments versions?

A: Both manufacturers produce functionally equivalent 74ACT244 logic buffers with identical electrical specifications. Differences exist only in package options, product status, and inventory availability. Selection should be based on package requirements and supply chain preferences.

Q: Are there any temperature range differences between substitutes?

A: SN74ACT244MNSREP operates across an extended temperature range of -55°C ~ 125°C, compared to the standard -40°C ~ 85°C range of the 74ACT244SJX and most other substitutes. This extended range is suitable for industrial and automotive applications requiring broader temperature performance.

Q: What does "3-State Output" mean for this buffer?

A: 3-State output capability allows the buffer to operate in three states: logic high, logic low, and high-impedance (disabled). This enables multiple drivers to share a common bus without contention when properly controlled.

Q: Is the 74ACT244 series suitable for new designs?

A: Yes. Active production alternatives such as SN74ACT244DWR, CD74ACT244M96, and 74ACT244SCX are suitable for new designs. The 74ACT series remains widely used in legacy and new applications requiring 5V logic buffering with 3-state output capability.

Q: What packaging format should I select for high-volume production?

A: For high-volume applications, SN74ACT244DWR in Cut Tape (CT) & Digi-Reel packaging offers the largest available inventory (93,100 pcs) and active production status, ensuring consistent supply and cost efficiency.