CD74FCT244ATM Equivalent & Substitute Parts

Part Overview

The CD74FCT244ATM is a non-inverting buffer logic IC manufactured by Texas Instruments, designed for 2 element, 4-bit per element configurations with 3-state output capability. This device operates at 4.75V to 5.25V supply voltage and is packaged in a 20-SOIC surface mount package. The part is currently in Last Time Buy status, indicating limited future availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring this buffer functionality.

Key Parameters

Parameter	Value
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
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD74FCT244ATM are classified based on strict electrical and mechanical parameter alignment:

Substitution Criteria:

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

Grouping Categories:

MFR Recommended Substitutes (Preferred): Parts recommended by manufacturers with active product status and full compliance certifications.
Parametric Equivalents: Parts meeting all electrical and mechanical parameters but with different product status or compliance profiles.

Parameter Comparison

Part Number	Manufacturer	Series	Packaging	Product Status	Operating Temperature	RoHS Status	Inventory (Pcs)
CD74FCT244ATM	Texas Instruments	74FCT	Tube	Last Time Buy	0°C ~ 70°C	ROHS3 Compliant	948
CD74FCT244ATM96	Texas Instruments	74FCT	Tape & Reel (TR)	Active	0°C ~ 70°C	ROHS3 Compliant	1632
CD74FCT244M	Harris Corporation	74FCT	Tube	Obsolete	0°C ~ 70°C	RoHS non-compliant	72349
74FCT244ATSOG	IDT, Integrated Device Technology Inc	74FCT	Bulk	Active	-40°C ~ 85°C	Not specified	1392
74FCT244ATSOG8	IDT, Integrated Device Technology Inc	74FCT	Bulk	Active	-40°C ~ 85°C	Not specified	4033
74FCT244CTSOG	IDT, Integrated Device Technology Inc	74FCT	Bulk	Active	-40°C ~ 85°C	Not specified	4033
SN74S241DW	Texas Instruments	74S	Tube	Active	0°C ~ 70°C	ROHS3 Compliant	1002
SN74S244DW	Texas Instruments	74S	Tube	Last Time Buy	0°C ~ 70°C	ROHS3 Compliant	950

Engineering Selection Recommendations

Primary Recommendation: CD74FCT244ATM96

The CD74FCT244ATM96 is the manufacturer-recommended substitute. It is electrically and mechanically identical to the CD74FCT244ATM, with identical operating temperature range (0°C ~ 70°C) and ROHS3 compliance. The primary difference is packaging format (Tape & Reel vs. Tube) and active product status, ensuring long-term availability. This part is suitable for direct replacement in all applications.

Secondary Recommendations: 74FCT244ATSOG, 74FCT244ATSOG8, 74FCT244CTSOG

These IDT parts meet all electrical and mechanical parameters and maintain active product status. They offer an extended operating temperature range (-40°C ~ 85°C), providing additional thermal margin for demanding environments. Bulk packaging may require adjustment to procurement workflows. These parts are suitable for applications where extended temperature operation is beneficial or required.

Parametric Equivalent: SN74S241DW

The SN74S241DW is a parametric equivalent from Texas Instruments with active product status and ROHS3 compliance. It operates within the same temperature range (0°C ~ 70°C) and meets all electrical specifications. The 74S series designation indicates a different logic family generation. This part is suitable for applications where family consistency is not a design constraint.

Not Recommended: CD74FCT244M

The CD74FCT244M (Harris Corporation) is obsolete and RoHS non-compliant. While parametrically equivalent, its obsolete status and non-compliance with modern environmental standards make it unsuitable for new designs or long-term supply assurance.

Not Recommended: SN74S244DW

The SN74S244DW is in Last Time Buy status, similar to the original CD74FCT244ATM. While it meets all electrical and mechanical parameters, its limited availability makes it unsuitable as a primary substitute strategy.

Frequently Asked Questions (FAQ)

Q: Can CD74FCT244ATM96 be used as a direct replacement for CD74FCT244ATM?

A: Yes. Both parts are electrically and mechanically identical, with the same operating temperature range (0°C ~ 70°C), supply voltage (4.75V ~ 5.25V), output current specifications (15mA, 64mA), and 20-SOIC package. The only difference is packaging format (Tape & Reel vs. Tube). CD74FCT244ATM96 has active product status, ensuring continued availability.

Q: What is the difference between the 74FCT and 74S series buffers?

A: Both series meet the same electrical and mechanical parameters for this application. The 74S series represents an earlier logic family generation. Selection between them depends on design requirements and supply chain preferences. Both are functionally compatible for the specified parameters.

Q: Are the IDT parts (74FCT244ATSOG, 74FCT244ATSOG8, 74FCT244CTSOG) suitable for my application?

A: Yes, if your application can accommodate the extended operating temperature range (-40°C ~ 85°C). These parts meet all electrical and mechanical parameters. The primary consideration is packaging format (Bulk vs. Tube/Tape & Reel), which may affect procurement and handling procedures.

Q: Why is CD74FCT244M not recommended despite high inventory?

A: The CD74FCT244M is obsolete and RoHS non-compliant. Obsolete status indicates no future manufacturing, creating long-term supply risk. Non-compliance with ROHS3 standards may conflict with regulatory requirements in many markets and applications.

Q: What packaging formats are available, and does it matter?

A: Available formats are Tube, Tape & Reel (TR), and Bulk. All formats contain the same die and electrical specifications. Selection depends on manufacturing processes: Tube and Tape & Reel are suitable for automated pick-and-place assembly, while Bulk packaging may require manual handling or specialized equipment. Verify compatibility with your assembly process before selection.

Q: Can I use SN74S244DW instead of CD74FCT244ATM?

A: Yes, electrically and mechanically. However, SN74S244DW is in Last Time Buy status, indicating limited future availability. For long-term supply assurance, CD74FCT244ATM96 or the active IDT alternatives are preferred.

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