PI74FCT244DTQE Equivalent & Substitute Parts

Part Overview

The PI74FCT244DTQE is a non-inverting buffer logic integrated circuit manufactured by Diodes Incorporated, designed for 2 elements with 4 bits per element and 3-state output capability. This device operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-QSOP package.

The PI74FCT244DTQE is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74FCT244DTQE
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

Substitute parts for the PI74FCT244DTQE are classified into two categories based on substitution criteria:

MFR Recommended Substitutes (Texas Instruments CY74FCT Series)

These parts are manufacturer-recommended alternatives that maintain full electrical and mechanical compatibility with the original PI74FCT244DTQE. The substitution is valid based on the following key 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)
Mounting Type: Surface Mount
Package / Case: 20-SSOP (0.154", 3.90mm Width)

All MFR recommended substitutes are manufactured by Texas Instruments and carry active product status with ROHS3 compliance.

Parametric Equivalents (IDT 74FCT244 Series)

These parts are parametric equivalents that match the electrical specifications and functional characteristics of the PI74FCT244DTQE. The substitution is valid based on the following key parameters:

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)

Parametric equivalents are manufactured by IDT (Integrated Device Technology Inc) and carry active product status.

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Elements	Bits/Element	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range (°C)	Package	RoHS	MSL
PI74FCT244DTQE	Diodes Inc	Obsolete	Buffer, Non-Inverting	2	4	3-State	15, 64	4.75~5.25V	-40~85	20-SSOP	ROHS3	1
CY74FCT2244ATQCT	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	15, 12	4.75~5.25V	-40~85	20-SSOP	ROHS3	2
CY74FCT2244CTQCT	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	15, 12	4.75~5.25V	-40~85	20-SSOP	ROHS3	2
CY74FCT2244TQCT	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	15, 12	4.75~5.25V	-40~85	20-SSOP	ROHS3	2
CY74FCT244ATQCT	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	32, 64	4.75~5.25V	-40~85	20-SSOP	ROHS3	2
CY74FCT244CTQCT	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	32, 64	4.75~5.25V	-40~85	20-SSOP	ROHS3	2
CY74FCT244TQCT	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	32, 64	4.75~5.25V	-40~85	20-SSOP	ROHS3	2
74FCT244ATQG	IDT	Active	Buffer, Non-Inverting	2	4	3-State	15, 64	4.75~5.25V	-40~85	20-SSOP	Not specified	Not specified
74FCT244CTQG	IDT	Active	Buffer, Non-Inverting	2	4	3-State	15, 64	4.75~5.25V	-40~85	20-SSOP	Not specified	Not specified

Engineering Selection Recommendations

For Active Product Continuity

Texas Instruments CY74FCT series parts (CY74FCT2244ATQCT, CY74FCT2244CTQCT, CY74FCT2244TQCT, CY74FCT244ATQCT, CY74FCT244CTQCT, CY74FCT244TQCT) are recommended as primary substitutes. All carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. These parts are available in multiple packaging configurations (Cut Tape and Tape & Reel) to accommodate different procurement and assembly requirements.

For Parametric Equivalence

IDT 74FCT244 series parts (74FCT244ATQG, 74FCT244CTQG) provide parametric equivalence with matching output current specifications (15mA high, 64mA low) identical to the original PI74FCT244DTQE. These parts maintain active product status and are suitable for applications where output current characteristics are critical design parameters.

Compliance Considerations

All recommended substitutes maintain ROHS3 compliance. Texas Instruments substitutes specify Moisture Sensitivity Level 2 (1 Year), compared to the original part's MSL 1 (Unlimited). This difference requires appropriate handling and storage protocols during component procurement and assembly operations.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT2244ATQCT directly replace PI74FCT244DTQE in existing designs?

A: CY74FCT2244ATQCT is a manufacturer-recommended substitute with matching logic type, element count, bit configuration, output type, supply voltage range, and operating temperature range. The 20-SSOP package dimensions are identical. However, the output low current specification differs (12mA versus 64mA), which may affect designs with specific current-sinking requirements. Verify circuit requirements before substitution.

Q: What is the difference between MFR Recommended and Parametric Equivalent classifications?

A: MFR Recommended substitutes are manufacturer-designated alternatives with full electrical and mechanical compatibility. Parametric Equivalents match the electrical specifications and functional characteristics but may not carry manufacturer endorsement. Both categories maintain the core functional parameters: 2 elements, 4 bits per element, 3-state output, 4.75V–5.25V supply, and -40°C to 85°C operating temperature.

Q: Are there packaging differences between substitute options?

A: Yes. Texas Instruments CY74FCT series parts are available in Cut Tape (CT) and Tape & Reel (TR) packaging. IDT 74FCT244 series parts are supplied in Bulk packaging. All maintain the same 20-SSOP physical package dimensions (0.154", 3.90mm Width). Packaging selection depends on procurement volume and assembly line requirements.

Q: How do output current specifications affect substitution decisions?

A: The PI74FCT244DTQE specifies 15mA output high and 64mA output low current. CY74FCT2244 variants specify 15mA high and 12mA low, while CY74FCT244 and IDT 74FCT244 variants match the original 15mA/64mA specification. Applications requiring maximum current-sinking capability should prioritize parts with 64mA low current ratings.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: The original PI74FCT244DTQE carries MSL 1 (Unlimited shelf life). Texas Instruments substitutes carry MSL 2 (1 Year shelf life). MSL 2 components require controlled storage conditions and have a defined shelf life from the manufacturing date. Procurement and inventory management must account for this difference to prevent component degradation.

Q: Are all substitute parts ROHS3 compliant?

A: All MFR Recommended substitutes (Texas Instruments CY74FCT series) explicitly specify ROHS3 compliance. IDT parametric equivalents do not specify RoHS status in the provided data. Verify RoHS compliance documentation with the supplier for IDT parts if regulatory compliance is a design requirement.

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