PI74FCT244ATS Equivalent & Substitute Parts

Part Overview

The PI74FCT244ATS is a non-inverting buffer logic IC manufactured by Diodes Incorporated, designed for 5.25V operation with 2 elements and 4 bits per element in a 20-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 74FCT244 series provides 3-state output capability with specified output current ratings suitable for digital logic buffering applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74FCT244ATS
Manufacturer	Diodes Incorporated
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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the PI74FCT244ATS is determined by strict electrical and mechanical compatibility across the following parameters:

Logic type: Buffer, Non-Inverting
Number of elements: 2
Number of bits per element: 4
Output type: 3-State
Supply voltage range: 4.75V ~ 5.25V
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Mounting type: Surface Mount

Substitute parts must maintain identical or compatible output current specifications (15mA high, 64mA low) and operate within the specified supply voltage and temperature ranges. Parts with different base product numbers (74FCT2244 series) or output current ratings outside the specified range are listed but require application-level verification due to parameter deviations.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Output Current (High/Low)	Operating Temp	Product Status	RoHS Status
PI74FCT244ATS	Diodes Incorporated	Buffer, Non-Inverting	15mA / 64mA	-40°C ~ 85°C	Obsolete	Non-compliant
CD74FCT244ATM	Harris Corporation	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Obsolete	Non-compliant
74FCT244ATSOG8	IDT, Integrated Device Technology Inc	Buffer, Non-Inverting	15mA / 64mA	-40°C ~ 85°C	Active	Not specified
CD74FCT244ATM96	Texas Instruments	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Active	ROHS3 Compliant
CD74FCT244M	Harris Corporation	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Obsolete	Non-compliant
CD74FCT244M96	Harris Corporation	Buffer, Non-Inverting	15mA / 64mA	0°C ~ 70°C	Obsolete	Non-compliant
CY74FCT2244ATSOC	Texas Instruments	Buffer, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant
CY74FCT2244CTSOC	Texas Instruments	Buffer, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant
CY74FCT2244TSOC	Texas Instruments	Buffer, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant
CY74FCT244ATSOC	Texas Instruments	Buffer, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	Active	ROHS3 Compliant
CY74FCT244ATSOCT	Cypress Semiconductor Corp	Buffer, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	Active	Not specified

Engineering Selection Recommendations

Direct substitutes maintaining full parameter compatibility with the PI74FCT244ATS include 74FCT244ATSOG8 (IDT), CD74FCT244ATM (Harris), CD74FCT244M (Harris), and CD74FCT244M96 (Harris). These parts share identical output current specifications (15mA high, 64mA low) and 20-SOIC packaging.

For applications requiring active product status and modern compliance, CD74FCT244ATM96 (Texas Instruments) is ROHS3 compliant and maintains full electrical compatibility, though operating temperature range is limited to 0°C ~ 70°C compared to the original -40°C ~ 85°C specification.

CY74FCT244ATSOC (Texas Instruments) and CY74FCT244ATSOCT (Cypress Semiconductor) provide active status with extended temperature range (-40°C ~ 85°C) and ROHS3 compliance, but feature elevated output high current (32mA) compared to the original specification.

Parts designated as 74FCT2244 series (CY74FCT2244ATSOC, CY74FCT2244CTSOC, CY74FCT2244TSOC) operate with reduced output low current (12mA) and represent a different base product variant requiring application verification.

Frequently Asked Questions (FAQ)

Q: Can CD74FCT244ATM96 be used as a direct replacement for PI74FCT244ATS in all applications?

A: CD74FCT244ATM96 maintains identical output current specifications and 20-SOIC packaging. However, its operating temperature range (0°C ~ 70°C) is narrower than the original (-40°C ~ 85°C). Applications requiring full temperature range operation must use alternatives such as 74FCT244ATSOG8 or CY74FCT244ATSOC.

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

A: The 74FCT2244 series (CY74FCT2244ATSOC, CY74FCT2244CTSOC, CY74FCT2244TSOC) features reduced output low current specification (12mA) compared to the 74FCT244 series (64mA). These represent different product variants and require circuit-level analysis to confirm compatibility.

Q: Are there RoHS-compliant alternatives available?

A: Yes. CD74FCT244ATM96 (Texas Instruments) and CY74FCT244ATSOC (Texas Instruments) are both ROHS3 compliant. CY74FCT244ATSOC additionally maintains the full -40°C ~ 85°C operating temperature range of the original part.

Q: Does packaging differ between substitute parts?

A: All listed substitute parts use 20-SOIC (0.295", 7.50mm Width) surface mount packaging, maintaining mechanical compatibility with the original PI74FCT244ATS.

Q: Which substitute offers the best availability and active product status?

A: CY74FCT244ATSOC (Texas Instruments) combines active product status, ROHS3 compliance, full temperature range operation (-40°C ~ 85°C), and 20-SOIC packaging. Output current specifications differ (32mA high vs. 15mA original), requiring application verification.

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