PI74FCT244CTQE Equivalent & Substitute Parts

Part Overview

The PI74FCT244CTQE is a non-inverting buffer logic IC manufactured by Diodes Incorporated, featuring 2 elements with 4 bits per element and 3-state output capability. This component operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-QSOP package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74FCT244CTQE
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)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PI74FCT244CTQE 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
Voltage - Supply: 4.75V ~ 5.25V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 20-SSOP (0.154", 3.90mm Width)

Substitute parts are grouped into two categories:

MFR Recommended Substitutes (Texas Instruments CY74FCT series): These parts are manufactured by Texas Instruments and maintain full electrical and mechanical compatibility with the original PI74FCT244CTQE. All MFR recommended substitutes are active products with ROHS3 compliance and are available in multiple packaging options (Cut Tape and Tape & Reel).

Parametric Equivalents (IDT 74FCT244 series): These parts from Integrated Device Technology Inc meet all core electrical parameters and package specifications. They function as direct parametric replacements while maintaining the same 20-QSOP package footprint.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range	Package	Status
PI74FCT244CTQE	Diodes Inc	Buffer, Non-Inverting	2	4	3-State	15, 64	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Obsolete
CY74FCT2244ATQCT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15, 12	4.75V ~ 5.25V	-40°C ~ 85°C	20-SSOP	Active
CY74FCT2244CTQCT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15, 12	4.75V ~ 5.25V	-40°C ~ 85°C	20-SSOP	Active
CY74FCT2244TQCT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15, 12	4.75V ~ 5.25V	-40°C ~ 85°C	20-SSOP	Active
CY74FCT244ATQCT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32, 64	4.75V ~ 5.25V	-40°C ~ 85°C	20-SSOP	Active
CY74FCT244CTQCT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32, 64	4.75V ~ 5.25V	-40°C ~ 85°C	20-SSOP	Active
CY74FCT244TQCT	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	32, 64	4.75V ~ 5.25V	-40°C ~ 85°C	20-SSOP	Active
74FCT244ATQG	IDT	Buffer, Non-Inverting	2	4	3-State	15, 64	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Active
74FCT244CTQG	IDT	Buffer, Non-Inverting	2	4	3-State	15, 64	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Active

Engineering Selection Recommendations

For Active Product Continuity: Texas Instruments CY74FCT series parts (CY74FCT2244ATQCT, CY74FCT2244CTQCT, CY74FCT2244TQCT, CY74FCT244ATQCT, CY74FCT244CTQCT, CY74FCT244TQCT) are recommended as primary substitutes. All are active products with ROHS3 compliance and MSL 2 (1 Year) rating. These parts are available in multiple packaging formats including Cut Tape (CT) and Tape & Reel (TR) options, providing flexibility for both prototype and production quantities.

For Parametric Equivalence: IDT 74FCT244ATQG and 74FCT244CTQG maintain identical output current specifications (15mA high, 64mA low) to the original PI74FCT244CTQE and operate within the same supply voltage and temperature ranges. Both are active products available in bulk packaging.

Current Output Considerations: Texas Instruments CY74FCT2244 variants specify 15mA high and 12mA low output current, which differs from the original 64mA low specification. Texas Instruments CY74FCT244 variants (ATQCT, CTQCT, TQCT) specify 32mA high and 64mA low, providing closer alignment to the original specifications. Application requirements should determine whether the reduced output current of CY74FCT2244 variants is acceptable.

Compliance and Certification: All recommended substitutes maintain ROHS3 compliance and EAR99 ECCN classification consistent with the original part. Moisture sensitivity levels range from MSL 1 (unlimited) for the original to MSL 2 (1 Year) for active substitutes, requiring standard handling procedures during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PI74FCT244CTQE with any Texas Instruments CY74FCT substitute?

A: Yes, all Texas Instruments CY74FCT series parts listed are direct substitutes. However, verify output current requirements for your application. CY74FCT2244 variants provide 12mA low output current, while CY74FCT244 variants provide 64mA low output current, matching the original specification.

Q: What is the difference between 20-QSOP and 20-SSOP packaging?

A: Both packages are 20-pin surface mount packages with 0.154" (3.90mm) width. The QSOP designation indicates a specific supplier device package format. Physical footprint compatibility is maintained across all listed substitutes.

Q: Are the IDT 74FCT244 parts (74FCT244ATQG, 74FCT244CTQG) equivalent to the Texas Instruments parts?

A: IDT 74FCT244 parts are parametric equivalents meeting all core electrical specifications and package requirements. They differ in manufacturer and packaging format (bulk vs. tape/reel). Both are active products suitable for new designs.

Q: What does MSL 2 (1 Year) mean compared to the original MSL 1?

A: MSL 2 (1 Year) indicates the component can be stored in standard conditions for up to one year before assembly. The original MSL 1 (Unlimited) allows indefinite storage. Standard moisture control procedures during assembly remain necessary for MSL 2 components.

Q: Which substitute should I choose for new production designs?

A: For new designs, select from active Texas Instruments CY74FCT series parts. CY74FCT244CTQCT and CY74FCT244TQCT are available in high quantities (4089 and 1842 units respectively) and support both Cut Tape and Tape & Reel packaging for production volumes.

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