74FCT244CTSOG8 Equivalent & Substitute Parts

Part Overview

The 74FCT244CTSOG8 is a non-inverting buffer logic IC manufactured by Renesas Electronics Corporation, featuring 2 elements with 4 bits per element and 3-state output capability. This device is classified as Last Time Buy, indicating limited availability from the original manufacturer. The 20-SOIC surface mount package provides standard pinout compatibility across the 74FCT244 series. Substitute parts are necessary due to product status constraints and to ensure design flexibility across multiple sourcing channels and manufacturing lifecycles.

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	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT244CTSOG8 is determined by the following critical parameters: logic type (Buffer, Non-Inverting), number of elements (2), bits per element (4), output type (3-State), supply voltage range (4.75V ~ 5.25V), package type (20-SOIC), and mounting type (Surface Mount). Parts are grouped into two categories based on operational temperature range and output current specifications. Category A includes parts with extended temperature range (-40°C ~ 85°C) and matching output current (15mA high, 64mA low). Category B includes parts with commercial temperature range (0°C ~ 70°C) or alternative output current ratings. All substitute parts maintain identical pinout and functional equivalence within their respective categories.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Output Current (High/Low)	Operating Temperature	Product Status	RoHS Status	Packaging
74FCT244CTSOG8	Renesas Electronics	Buffer, Non-Inverting	15mA / 64mA	-40°C ~ 85°C	Last Time Buy	ROHS3 Compliant	Tape & Reel (TR)
74FCT244ATSOG8	IDT	Buffer, Non-Inverting	15mA / 64mA	-40°C ~ 85°C	Active	Not specified	Bulk
CD74FCT244ATM	Harris Corporation	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Obsolete	RoHS non-compliant	Tube
CD74FCT244ATM96	Texas Instruments	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Active	ROHS3 Compliant	Tape & Reel (TR)
CD74FCT244M	Harris Corporation	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Obsolete	RoHS non-compliant	Tube
CD74FCT244M96	Harris Corporation	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Obsolete	RoHS non-compliant	Bulk
CY74FCT2244ATSOC	Texas Instruments	Buffer, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT2244CTSOC	Texas Instruments	Buffer, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT2244TSOC	Texas Instruments	Buffer, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT244ATSOC	Texas Instruments	Buffer, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT244ATSOCT	Cypress Semiconductor	Buffer, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	Active	Not specified	Bulk

Engineering Selection Recommendations

For applications requiring extended temperature operation (-40°C ~ 85°C) with matching output current specifications (15mA high, 64mA low), the 74FCT244ATSOG8 from IDT provides direct parametric equivalence with Active product status. The CD74FCT244ATM96 from Texas Instruments offers ROHS3 compliance and Active status but operates within the commercial temperature range (0°C ~ 70°C), suitable for non-extended temperature applications. Parts from Harris Corporation (CD74FCT244ATM, CD74FCT244M, CD74FCT244M96) are classified as Obsolete and RoHS non-compliant, limiting their use to legacy system maintenance or applications without RoHS requirements.

The CY74FCT2244 series variants (CY74FCT2244ATSOC, CY74FCT2244CTSOC, CY74FCT2244TSOC) maintain extended temperature range and ROHS3 compliance but feature reduced output low current (12mA versus 64mA), requiring verification that load requirements do not exceed this specification. The CY74FCT244ATSOC and CY74FCT244ATSOCT variants provide enhanced output high current (32mA) with extended temperature range and ROHS3 compliance, suitable for applications with higher drive requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 74FCT244CTSOG8 with any part from the substitute list?

A: Direct substitution depends on your application's temperature and current requirements. The 74FCT244ATSOG8 provides identical electrical specifications and extended temperature range. Parts with commercial temperature range (0°C ~ 70°C) are suitable only for applications not requiring extended temperature operation. Parts with different output current ratings require verification that your load specifications are compatible.

Q: What is the difference between the 74FCT244 and 74FCT2244 series?

A: The 74FCT2244 series variants (CY74FCT2244ATSOC, CY74FCT2244CTSOC, CY74FCT2244TSOC) feature reduced output low current (12mA) compared to the standard 74FCT244 series (64mA). This difference may affect circuit performance in applications with heavy load requirements. Verify your specific load current demands before selecting a 74FCT2244 variant.

Q: Are all substitute parts RoHS compliant?

A: No. The CD74FCT244ATM, CD74FCT244M, and CD74FCT244M96 parts from Harris Corporation are RoHS non-compliant. The 74FCT244ATSOG8, CD74FCT244ATM96, CY74FCT2244ATSOC, CY74FCT2244CTSOC, CY74FCT2244TSOC, and CY74FCT244ATSOC are ROHS3 compliant. Verify RoHS compliance requirements for your application before selection.

Q: What packaging options are available?

A: The 74FCT244CTSOG8 is supplied in Tape & Reel (TR) packaging. Substitute parts are available in Tape & Reel (TR), Tube, and Bulk packaging formats. Packaging selection affects handling, storage, and assembly processes. Verify your manufacturing process requirements before selecting a packaging option.

Q: Why is the 74FCT244CTSOG8 marked as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer (Renesas Electronics) is discontinuing production. Existing inventory is available, but no future production is planned. Substitute parts with Active status from alternative manufacturers ensure long-term design continuity and supply chain reliability.

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