74FCT2244ATSOG Equivalent & Substitute Parts

Part Overview

The 74FCT2244ATSOG 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 operates at 4.75V to 5.25V supply voltage with an operating temperature range of -40°C to 85°C in a 20-SOIC surface mount package.

The 74FCT2244ATSOG is classified as Last Time Buy, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

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, 12mA
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 of the 74FCT2244ATSOG is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Voltage - Supply: 4.75V ~ 5.25V

Allowable Variations:

Current - Output High, Low: Substitute parts may have equal or higher output current ratings
Operating Temperature: Substitute parts may have narrower temperature ranges (0°C ~ 70°C acceptable for applications not requiring full -40°C ~ 85°C range)
Product Status: Active or Obsolete parts acceptable based on application requirements
RoHS Compliance: ROHS3 Compliant preferred; RoHS non-compliant parts available for legacy applications
Packaging Format: Tube, Tape & Reel (TR), or Bulk acceptable

All substitute parts listed share the base product number 74FCT244 and maintain functional equivalence within the 74FCT logic family.

Parameter Comparison

Part Number	Manufacturer	Current - Output High, Low (mA)	Operating Temperature (°C)	Product Status	RoHS Status	Packaging	Inventory (Pcs)
74FCT2244ATSOG	Renesas Electronics	15, 12	-40 ~ 85	Last Time Buy	ROHS3 Compliant	Tube	981
CD74FCT244ATM	Harris Corporation	15, 64	0 ~ 70	Obsolete	RoHS non-compliant	Tube	22662
CD74FCT244ATM96	Texas Instruments	15, 64	0 ~ 70	Active	ROHS3 Compliant	Tape & Reel (TR)	1632
CD74FCT244M	Harris Corporation	15, 64	0 ~ 70	Obsolete	RoHS non-compliant	Tube	72349
CD74FCT244M96	Harris Corporation	15, 64	0 ~ 70	Obsolete	RoHS non-compliant	Bulk	3100
CY74FCT244ATSOC	Texas Instruments	32, 64	-40 ~ 85	Active	ROHS3 Compliant	Tube	1185
CY74FCT244ATSOCT	Cypress Semiconductor	32, 64	-40 ~ 85	Active	Not specified	Bulk	4400
CY74FCT244CTSOC	Texas Instruments	32, 64	-40 ~ 85	Active	ROHS3 Compliant	Tube	2954
CY74FCT244DTSOC	Texas Instruments	32, 64	0 ~ 70	Active	ROHS3 Compliant	Tube	1607
CY74FCT244DTSOCT	Texas Instruments	32, 64	0 ~ 70	Active	ROHS3 Compliant	Tape & Reel (TR)	2701
CY74FCT244TSOC	Texas Instruments	32, 64	-40 ~ 85	Active	ROHS3 Compliant	Tube	1028

Engineering Selection Recommendations

For Full Temperature Range Applications (-40°C ~ 85°C):

Select from Active status parts with extended temperature range: CY74FCT244ATSOC, CY74FCT244ATSOCT, CY74FCT244CTSOC, or CY74FCT244TSOC. These parts maintain ROHS3 compliance and provide higher output current capability (32mA high, 64mA low) compared to the original 74FCT2244ATSOG specification.

For Standard Temperature Range Applications (0°C ~ 70°C):

CY74FCT244DTSOC and CY74FCT244DTSOCT are Active status alternatives with ROHS3 compliance. CD74FCT244ATM96 from Texas Instruments is also Active and ROHS3 compliant, available in Tape & Reel packaging.

For Legacy or Non-RoHS Constrained Applications:

CD74FCT244M and CD74FCT244ATM from Harris Corporation are available in Obsolete status with high inventory levels (72349 and 22662 units respectively), though these are RoHS non-compliant.

Packaging Considerations:

Tube packaging is standard for most alternatives. Tape & Reel (TR) format is available for CD74FCT244ATM96, CY74FCT244DTSOCT, and CY74FCT244TSOC for automated assembly operations. Bulk packaging is available for CD74FCT244M96 and CY74FCT244ATSOCT.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74FCT2244ATSOG with any of the listed substitutes?

A: Yes, all listed parts maintain functional equivalence as non-inverting buffers with 2 elements, 4 bits per element, and 3-state output in 20-SOIC packaging. However, verify that your application tolerates the operating temperature range and output current specifications of the selected substitute.

Q: What is the difference between CD74FCT244 and CY74FCT244 variants?

A: Both are 74FCT244 base products from different manufacturers (Harris/Texas Instruments for CD series; Cypress/Texas Instruments for CY series). All maintain the same logic function and package. The primary differences are output current ratings, temperature ranges, and product status.

Q: Why do some substitutes have higher output current (32mA/64mA vs. 15mA/12mA)?

A: Higher output current ratings indicate enhanced drive capability. These parts are functionally compatible and can directly replace the original part. Applications requiring the original current specifications will operate within the substitute's capability envelope.

Q: Are Obsolete status parts acceptable for new designs?

A: Obsolete parts (CD74FCT244 series from Harris) are suitable only for replacement or repair of existing equipment. For new designs, select from Active status parts: CY74FCT244 series from Texas Instruments or Cypress Semiconductor.

Q: What is the significance of the temperature range suffix (A, C, D)?

A: Temperature range suffixes indicate operating temperature specifications. "A" and "C" variants support -40°C ~ 85°C; "D" variants support 0°C ~ 70°C. Select based on your application's thermal requirements.

Q: Does packaging format affect electrical performance?

A: No. Tube, Tape & Reel, and Bulk packaging formats contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements and volume handling.

Q: Are all substitutes ROHS3 compliant?

A: No. Active status parts from Texas Instruments and Cypress (CY74FCT244 series) are ROHS3 compliant. Obsolete Harris parts (CD74FCT244 series) are RoHS non-compliant. Verify compliance requirements for your application.

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