PI74FCT2244ATS Equivalent & Substitute Parts

Part Overview

The PI74FCT2244ATS is a non-inverting buffer logic IC manufactured by Diodes Incorporated, featuring 2 elements with 4 bits per element and 3-state output capability in a 20-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74FCT2244ATS
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
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PI74FCT2244ATS is determined by the following critical 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
Mounting Type: Surface Mount

Substitute parts must maintain identical electrical functionality and physical package specifications. Output current ratings and operating temperature ranges may vary within acceptable design margins. Parts are grouped by base product number (74FCT244 or 74FCT2244 series) and manufacturer, with consideration for product status and compliance certifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status	RoHS Status
PI74FCT2244ATS	Diodes Incorporated	Buffer, Non-Inverting	2 / 4	3-State	15 / 64	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Obsolete	Non-compliant
74FCT244ATSOG8	IDT	Buffer, Non-Inverting	2 / 4	3-State	15 / 64	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Active	Not specified
CD74FCT244ATM	Harris Corporation	Buffer, Non-Inverting	2 / 4	3-State	15 / 64	4.75 ~ 5.25V	0 ~ 70	20-SOIC	Obsolete	Non-compliant
CD74FCT244ATM96	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	15 / 64	4.75 ~ 5.25V	0 ~ 70	20-SOIC	Active	ROHS3 Compliant
CD74FCT244M	Harris Corporation	Buffer, Non-Inverting	2 / 4	3-State	15 / 64	4.75 ~ 5.25V	0 ~ 70	20-SOIC	Obsolete	Non-compliant
CD74FCT244M96	Harris Corporation	Buffer, Non-Inverting	2 / 4	3-State	15 / 64	4.75 ~ 5.25V	0 ~ 70	20-SOIC	Obsolete	Non-compliant
CY74FCT2244ATSOC	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	15 / 12	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Active	ROHS3 Compliant
CY74FCT2244CTSOC	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	15 / 12	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Active	ROHS3 Compliant
CY74FCT2244TSOC	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	15 / 12	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Active	ROHS3 Compliant
CY74FCT244ATSOC	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32 / 64	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Active	ROHS3 Compliant
CY74FCT244ATSOCT	Cypress Semiconductor Corp	Buffer, Non-Inverting	2 / 4	3-State	32 / 64	4.75 ~ 5.25V	-40 ~ 85	20-SOIC	Active	Not specified

Engineering Selection Recommendations

For new designs and procurement, CD74FCT244ATM96 (Texas Instruments) is the primary recommended substitute. This part maintains full electrical and mechanical compatibility with the PI74FCT2244ATS while offering active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

CY74FCT2244ATSOC, CY74FCT2244CTSOC, and CY74FCT2244TSOC (Texas Instruments) provide extended temperature range operation (-40°C to 85°C) matching the original part specification, with ROHS3 compliance and active status. These variants are suitable for applications requiring the full temperature envelope.

CY74FCT244ATSOC and CY74FCT244ATSOCT offer enhanced output current capability (32mA high, 64mA low) with active product status and extended temperature range, providing design flexibility for higher drive applications within the 20-SOIC package constraint.

74FCT244ATSOG8 (IDT) maintains exact electrical specifications and active product status but lacks specified RoHS certification documentation.

Obsolete alternatives (CD74FCT244ATM, CD74FCT244M, CD74FCT244M96) remain functionally equivalent but present procurement risk due to discontinued status and lack of modern compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PI74FCT2244ATS with any of these substitute parts?

A: Yes, all listed substitutes maintain the same logic type (non-inverting buffer), element count (2 elements, 4 bits each), output type (3-state), supply voltage range (4.75V to 5.25V), and 20-SOIC package specification. Physical and electrical pin compatibility is preserved across all alternatives.

Q: What is the difference between 74FCT244 and 74FCT2244 base product numbers?

A: Both designations refer to functionally equivalent non-inverting buffer ICs within the 74FCT logic family. The variations in part numbering reflect different manufacturer implementations and temperature grade specifications. Electrical functionality and package compatibility remain consistent.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range does not prevent substitution but must be evaluated against application requirements. The PI74FCT2244ATS specifies -40°C to 85°C. Substitutes with 0°C to 70°C range (CD74FCT244 variants) are suitable for applications within that narrower window. Extended temperature variants (CY74FCT2244 series) provide full -40°C to 85°C coverage.

Q: Are there output current differences between substitutes?

A: Yes. The original PI74FCT2244ATS specifies 15mA output high and 64mA output low. Some CY74FCT2244 variants specify 15mA high and 12mA low, while CY74FCT244ATSOC and CY74FCT244ATSOCT provide 32mA high and 64mA low. These variations must be evaluated against circuit load requirements.

Q: What is the significance of RoHS compliance status?

A: ROHS3 compliant parts (CD74FCT244ATM96, CY74FCT2244 series) meet current environmental and hazardous substance restrictions, ensuring regulatory compliance for new product designs and long-term supply chain viability. Non-compliant parts may face procurement restrictions in regulated markets.

Q: Can I use obsolete substitute parts in new designs?

A: Obsolete parts present supply chain risk and are not recommended for new designs. However, they remain functionally equivalent for legacy system maintenance or repair applications where existing inventory is available.

Q: Does packaging type (Tube, Bulk, Tape & Reel) affect electrical compatibility?

A: No. Packaging type affects only procurement and handling logistics. All substitutes in 20-SOIC package are electrically and mechanically identical regardless of packaging format.

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