CD74FCT244M Equivalent & Substitute Parts

Part Overview

The CD74FCT244M is a non-inverting buffer logic IC manufactured by Texas Instruments, designed for 5.25V operation in a 20-SOIC surface mount package. This component functions as a 2-element, 4-bit buffer with 3-state output capability, providing signal buffering and line driving in digital logic applications. The part is currently in Last Time Buy status, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for ongoing production and maintenance applications.

Substiute Parts

CD74FCT244M

Texas InstrumentsIn Stock: 1794CD74FCT244M Datasheet

Current PartRFQ

CD74FCT244M96

Harris CorporationIn Stock: 3142CD74FCT244M96 Datasheet

MFR RecommendedRFQ

CD74FCT244ATM

Harris CorporationIn Stock: 22718CD74FCT244ATM Datasheet

Parametric EquivalentRFQ

74FCT244ATSOG

IDT, Integrated Device Technology IncIn Stock: 145874FCT244ATSOG Datasheet

MFR RecommendedRFQ

74FCT244ATSOG8

IDT, Integrated Device Technology IncIn Stock: 407474FCT244ATSOG8 Datasheet

MFR RecommendedRFQ

74FCT244CTSOG

IDT, Integrated Device Technology IncIn Stock: 221774FCT244CTSOG Datasheet

MFR RecommendedRFQ

SN74S241DW

Texas InstrumentsIn Stock: 1046SN74S241DW Datasheet

Parametric EquivalentRFQ

SN74S244DW

Texas InstrumentsIn Stock: 1019SN74S244DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74FCT244M are classified based on strict electrical and mechanical parameter alignment. The substitution criteria are:

Critical Parameters for Substitution:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Current - Output High, Low: 15mA, 64mA
• Voltage - Supply: 4.75V ~ 5.25V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Substitution Categories:

MFR Recommended Substitutes – Parts recommended by manufacturers with identical electrical specifications and package footprint, differing primarily in product status or compliance certifications.

Parametric Equivalents – Parts meeting all critical electrical and mechanical parameters but from different manufacturers or series, maintaining full functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Active Production:

The IDT 74FCT244 series parts (74FCT244ATSOG, 74FCT244ATSOG8, 74FCT244CTSOG) are the primary recommendation. These parts maintain Active product status, ensuring long-term availability and supply chain stability. All three variants meet the electrical and mechanical requirements of the CD74FCT244M while offering an extended operating temperature range of -40°C ~ 85°C, providing greater thermal margin for demanding applications.

For RoHS3 Compliance Requirements:

The SN74S241DW and SN74S244DW from Texas Instruments are ROHS3 compliant alternatives. Both parts are electrically equivalent to the CD74FCT244M and maintain the same 20-SOIC package footprint. The SN74S241DW is currently Active, while SN74S244DW carries Last Time Buy status. These parts operate within the same 0°C ~ 70°C temperature range as the original part.

For Legacy System Maintenance:

The CD74FCT244ATM (Harris Corporation) provides a direct parametric equivalent with identical electrical specifications and packaging. However, this part is Obsolete and RoHS non-compliant, limiting its use to legacy systems where RoHS compliance is not required and inventory availability is confirmed.

Avoid:

The CD74FCT244M96 (Harris Corporation) is Obsolete and RoHS non-compliant. Use only if existing inventory is available and RoHS compliance is not a design requirement.

Frequently Asked Questions (FAQ)

Q: Can I use 74FCT244ATSOG as a direct replacement for CD74FCT244M in existing designs?

A: Yes. The 74FCT244ATSOG meets all critical electrical parameters (logic type, element count, bit configuration, output type, current ratings, and supply voltage) and uses the identical 20-SOIC package. The extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) provides additional thermal margin. No circuit modifications are required.

Q: What is the difference between 74FCT244ATSOG, 74FCT244ATSOG8, and 74FCT244CTSOG?

A: All three parts are functionally equivalent with identical electrical specifications and packaging. The differences are in manufacturer part numbering conventions and packaging configurations (Bulk packaging for all three). Selection between these variants should be based on inventory availability and supplier preference, as electrical performance is identical.

Q: Are the SN74S241DW and SN74S244DW compatible with CD74FCT244M?

A: Yes. Both parts are parametric equivalents meeting all critical electrical and mechanical specifications. Both are ROHS3 compliant and currently available (SN74S241DW is Active; SN74S244DW is Last Time Buy). The primary difference is the series designation (74S versus 74FCT), which does not affect functional compatibility in this application.

Q: Why is the CD74FCT244M in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing production. This necessitates identifying and qualifying substitute parts to ensure design continuity. The recommended IDT 74FCT244 variants provide long-term availability with Active product status.

Q: Can I use obsolete parts like CD74FCT244ATM as substitutes?

A: Obsolete parts may be used only if existing inventory is confirmed available and RoHS compliance is not a design requirement. For new production or designs requiring RoHS3 compliance, use Active or Last Time Buy parts from the recommended list.

Q: Does the 20-SOIC package footprint remain identical across all substitute parts?

A: Yes. All substitute parts use the 20-SOIC (0.295", 7.50mm Width) package. PCB layout and footprint designs require no modification when substituting between these parts.

Q: What is the significance of the extended temperature range in IDT parts?

A: The IDT 74FCT244 variants operate from -40°C ~ 85°C compared to the CD74FCT244M range of 0°C ~ 70°C. This extended range provides greater thermal margin and allows use in applications with wider operating temperature requirements without circuit redesign.